extends CharacterBody3D
class_name PlayerMovementController

signal chain_updated(count: int, bonus: float)

@export var params: MovementParams = preload("res://movement/movement_params.gd").new()

var _machine: MovementStateMachine = null
var head_pivot: Node3D = null  # FPSCameraRig node
var camera: Camera3D = null
var flashlight: SpotLight3D = null
var _damage_layer: CanvasLayer = null

# Third-person view toggle (local player only). The first-person camera keeps
# handling aim/firing; the toggle only changes which camera renders and whether
# the owner sees their own model.
var third_person: bool = false
var _tp_camera: Camera3D = null

# Health and Shield
var max_health: float = 100.0
var health: float = 100.0
var max_shield: float = 100.0
var shield: float = 100.0
var time_since_last_damage: float = 0.0
var death_count: int = 0
var is_dead: bool = false

# UI
var health_bar: ProgressBar
var shield_bar: ProgressBar
var health_label: Label
var shield_label: Label
var death_screen: Control

var ragdoll_instance: Node3D
# Audio
var footstep_player: AudioStreamPlayer
var footstep_streams: Array = []
var land_player: AudioStreamPlayer
var _remote_footstep_timer: float = 0.0

# Networked one-shot animation actions (reload/throw): the owner bumps the
# sequence; remote peers play the named action when it changes.
@export var synced_action: String = ""
@export var synced_action_seq: int = 0
var _last_action_seq: int = 0
var _was_reloading: bool = false
## Ammo count last frame — a drop means we fired, which kicks the owner's
## own third-person model (remote shooters go through server_play_fire_effects).
var _last_local_ammo: int = -1
var dash_player: AudioStreamPlayer
var recent_attackers: Dictionary = {} # attacker_id: timestamp
var hit_player: AudioStreamPlayer
var slide_player: AudioStreamPlayer
var wallrun_player: AudioStreamPlayer
var wind_player: AudioStreamPlayer
var jump_player: AudioStreamPlayer
var double_jump_player: AudioStreamPlayer
var vault_player: AudioStreamPlayer

var grapple_shoot_player: AudioStreamPlayer
var grapple_latch_player: AudioStreamPlayer
var grapple_swing_player: AudioStreamPlayer

# UI
var hit_marker: Control
var _hit_marker_tween: Tween
var reload_ring: Control

var grenades: int = 2
var is_holding_grenade: bool = false
var trajectory_mesh: MultiMeshInstance3D

# Grapple
var grapple_rope: MeshInstance3D

# ── Multiplayer Sync Variables ─────────────────────────────────────────────
# These are written by the authority each frame and replicated to remote peers
# via the MultiplayerSynchronizer properties.
# Movement is CLIENT-AUTHORITATIVE: the owning peer simulates locally and
# broadcasts position/velocity; remote peers interpolate toward it (see
# _process). The server stays authoritative for health, shield, and kills.
var synced_movement_state: String = "idle"
var synced_movement_speed: float = 0.0
var synced_is_crouching: bool = false
var synced_position: Vector3 = Vector3.ZERO
var synced_velocity: Vector3 = Vector3.ZERO
var synced_is_ads: bool = false
var synced_wall_side: float = 0.0  # -1 wall left, +1 wall right (wall-run lean)
var synced_is_dancing: bool = false  # dance emote (B), shown on the model

# Anime speed-lines overlay (local player only)
var _speedlines: ColorRect = null
var _speedline_burst: float = 0.0
@export var synced_skin_id: String = ""
@export var synced_weapon_path: String = ""

# Remote interpolation tuning
const NET_LERP_RATE := 18.0        # exponential smoothing rate for remote players
const NET_SNAP_DISTANCE := 6.0     # teleport if desync exceeds this (respawns etc.)
const NET_EXTRAPOLATION := 0.05    # seconds of velocity extrapolation

var skinned_model: Node3D = null
var _applied_skin_id: String = "__none__"
@export var synced_grapple_point: Vector3 = Vector3.ZERO
@export var synced_is_grapple_shooting: bool = false

# For homing rocket
@export var synced_is_targeting: bool = false
@export var synced_homing_target_pos: Vector3 = Vector3.ZERO

var synced_loadout_p1: String = ""
var synced_loadout_p2: String = ""
var synced_loadout_sp: String = ""
var synced_loadout_melee: String = ""
var synced_loadout_ready: bool = false

func _ready() -> void:
	var sm := _ensure_machine()
	if sm:
		sm.player = self
		sm.params = params
		sm.movement_event.connect(_on_movement_event)

	# Find camera rig
	head_pivot = get_node_or_null("HeadPivot")
	if head_pivot:
		camera = head_pivot.get_node_or_null("Camera3D")
		
		if camera:
			flashlight = SpotLight3D.new()
			flashlight.spot_range = 100.0
			flashlight.spot_angle = 35.0
			flashlight.light_energy = 5.0 
			flashlight.light_volumetric_fog_energy = 0.0 # Prevents the blinding fog glare and laggy trails
			flashlight.shadow_enabled = false 
			flashlight.position = Vector3(0, 0, 0) 
			flashlight.visible = false
			camera.add_child(flashlight)

	_setup_audio()
	_setup_grapple()
	_setup_grenade_trajectory()
	
	if is_multiplayer_authority():
		_damage_layer = CanvasLayer.new()
		add_child(_damage_layer)
		_setup_hit_marker()
		_setup_hud()
		_setup_speedlines()
	else:
		call_deferred("_hide_remote_weapons")

	set_process(true)
	if is_multiplayer_authority():
		set_physics_process(true)
		var skin_mgr = get_node_or_null("/root/SkinManager")
		if skin_mgr:
			synced_skin_id = skin_mgr.active_skin_id
		synced_position = position
		_setup_third_person_camera()
	# Build the visual model for whatever skin is selected (remote peers get
	# the id via the synchronizer and rebuild in _process when it arrives).
	_apply_skin_model(synced_skin_id)


## Over-the-shoulder camera for the local player, on a spring arm so it doesn't
## clip through walls. The first-person camera still exists and handles firing;
## this one only renders when third_person is on.
func _setup_third_person_camera() -> void:
	if not head_pivot or not is_instance_valid(camera):
		return
	# Chain: head_pivot > OrbitPivot (Alt free-look, springs back to zero)
	#        > ShoulderOffset (camera right of the spine — the character sits
	#        slightly LEFT of screen centre, Fortnite-style) > SpringArm.
	var orbit := Node3D.new()
	orbit.name = "OrbitPivot"
	head_pivot.add_child(orbit)

	var shoulder := Node3D.new()
	shoulder.name = "ShoulderOffset"
	shoulder.position = Vector3(0.55, 0.12, 0.0)
	orbit.add_child(shoulder)

	var boom := SpringArm3D.new()
	boom.name = "ThirdPersonBoom"
	boom.spring_length = 2.6
	boom.margin = 0.3
	boom.collision_mask = 1  # environment only
	boom.add_excluded_object(get_rid())
	# Aim the arm up-and-back from the shoulder so the camera sits behind/above.
	boom.rotation_degrees = Vector3(14, 0, 0)
	shoulder.add_child(boom)

	_tp_camera = Camera3D.new()
	_tp_camera.name = "ThirdPersonCamera"
	_tp_camera.fov = camera.fov
	_tp_camera.current = false
	# Never render the first-person viewmodel layer (20) — otherwise the gun
	# and arms float in front of the third-person view.
	_tp_camera.cull_mask &= ~(1 << 19)
	boom.add_child(_tp_camera)


## Toggle between first- and third-person. Firing keeps using the first-person
## camera, so aim is unchanged; only rendering and self-visibility change.
func set_third_person(on: bool) -> void:
	if not is_multiplayer_authority():
		return
	third_person = on
	if is_instance_valid(_tp_camera):
		_tp_camera.fov = SettingsManager.world_fov # stay in sync with settings
		_tp_camera.current = on
	if is_instance_valid(camera):
		camera.current = not on
	# Reveal / hide the owner's own model.
	var visual = get_visual_model()
	if visual and visual.has_method("set_owner_visible"):
		visual.set_owner_visible(on)
	# Hide the first-person weapon viewmodel in third person (it would float in
	# the middle of the screen); the third-person weapon on the model shows.
	if is_instance_valid(camera):
		var wman = camera.get_node_or_null("WeaponManager")
		if wman and "canvas_layer" in wman and is_instance_valid(wman.canvas_layer):
			wman.canvas_layer.visible = not on

## Returns the node that visually represents this player (skinned GLB model
## if the active skin has one, otherwise the procedural HumanoidModel).
func get_visual_model() -> Node3D:
	if is_instance_valid(skinned_model):
		return skinned_model
	return get_node_or_null("HumanoidModel")

## Swap the visual model to match a skin id. GLB skins replace the procedural
## model entirely; color skins tint the procedural model.
func _apply_skin_model(skin_id: String) -> void:
	_applied_skin_id = skin_id
	var humanoid = get_node_or_null("HumanoidModel")
	var old = get_node_or_null("SkinnedModel")
	if old:
		remove_child(old)
		old.queue_free()
	skinned_model = null

	var skin_mgr = get_node_or_null("/root/SkinManager")
	var skin = skin_mgr.get_skin(skin_id) if skin_mgr else null
	var has_model: bool = skin != null and skin.model_path != "" \
		and (ResourceLoader.exists(skin.model_path) or FileAccess.file_exists(skin.model_path))

	if has_model:
		var model := SkinnedPlayerModel.new()
		model.name = "SkinnedModel"
		model.model_path = skin.model_path
		# Owner gets the first-person body view (head hidden, fully animated);
		# everyone else sees the full third-person model.
		model.first_person_mode = is_multiplayer_authority()
		model.position = Vector3(0, -0.9, 0)  # capsule center -> feet
		add_child(model)
		skinned_model = model
		if humanoid:
			humanoid.visible = false
	else:
		if humanoid:
			humanoid.visible = not is_dead
			if skin and humanoid.has_method("_apply_color"):
				humanoid._apply_color(skin.color_tint)

func _hide_remote_weapons() -> void:
	if camera:
		var wman = camera.get_node_or_null("WeaponManager")
		if wman:
			wman.visible = false
			wman.process_mode = Node.PROCESS_MODE_DISABLED
			var cv = wman.get("canvas_layer")
			if cv:
				cv.visible = false

func _setup_audio() -> void:
	footstep_player = AudioStreamPlayer.new()
	footstep_player.bus = "SFX"
	for path in ["res://assets/sounds/footstep.wav", "res://assets/sounds/footstep_01.wav",
			"res://assets/sounds/footstep_02.wav", "res://assets/sounds/footstep_03.wav",
			"res://assets/sounds/footstep_04.wav"]:
		if ResourceLoader.exists(path):
			footstep_streams.append(load(path))
	footstep_player.stream = footstep_streams[0] if not footstep_streams.is_empty() else null
	add_child(footstep_player)

	land_player = AudioStreamPlayer.new()
	land_player.bus = "SFX"
	land_player.stream = load("res://assets/sounds/land.wav")
	add_child(land_player)
	
	jump_player = AudioStreamPlayer.new()
	jump_player.bus = "SFX"
	jump_player.stream = load("res://assets/sounds/jump.wav")
	add_child(jump_player)
	
	double_jump_player = AudioStreamPlayer.new()
	double_jump_player.bus = "SFX"
	jump_player.bus = "SFX"
	double_jump_player.stream = load("res://assets/sounds/double_jump.wav")
	add_child(double_jump_player)
	
	vault_player = AudioStreamPlayer.new()
	vault_player.bus = "SFX"
	vault_player.stream = load("res://assets/sounds/vault.wav")
	add_child(vault_player)
	
	dash_player = AudioStreamPlayer.new()
	dash_player.bus = "SFX"
	dash_player.stream = load("res://assets/sounds/dash.wav")
	dash_player.volume_db = -5.0
	add_child(dash_player)
	
	hit_player = AudioStreamPlayer.new()
	hit_player.bus = "SFX"
	hit_player.stream = load("res://assets/sounds/hit_confirm.wav")
	hit_player.max_polyphony = 8
	add_child(hit_player)
	
	slide_player = AudioStreamPlayer.new()
	slide_player.bus = "SFX"
	slide_player.stream = load("res://assets/sounds/slide.wav")
	slide_player.volume_db = -10.0
	add_child(slide_player)
	
	wallrun_player = AudioStreamPlayer.new()
	wallrun_player.bus = "SFX"
	wallrun_player.stream = load("res://assets/sounds/wallrun.wav")
	wallrun_player.volume_db = -10.0
	add_child(wallrun_player)
	
	wind_player = AudioStreamPlayer.new()
	wind_player.bus = "Wind"
	wind_player.stream = load("res://assets/sounds/wind.wav")
	wind_player.volume_db = -80.0 # Start silent
	add_child(wind_player)
	wind_player.play()
	
	grapple_shoot_player = AudioStreamPlayer.new()
	grapple_shoot_player.bus = "SFX"
	grapple_shoot_player.stream = load("res://assets/sounds/dash.wav")
	grapple_shoot_player.volume_db = -5.0
	grapple_shoot_player.pitch_scale = 1.5
	add_child(grapple_shoot_player)
	
	grapple_latch_player = AudioStreamPlayer.new()
	grapple_latch_player.bus = "SFX"
	grapple_latch_player.stream = load("res://assets/sounds/hit_confirm.wav")
	grapple_latch_player.pitch_scale = 0.8
	add_child(grapple_latch_player)
	
	grapple_swing_player = AudioStreamPlayer.new()
	grapple_swing_player.bus = "SFX"
	grapple_swing_player.stream = load("res://assets/sounds/wind.wav")
	grapple_swing_player.pitch_scale = 1.5
	grapple_swing_player.volume_db = -80.0
	add_child(grapple_swing_player)
	grapple_swing_player.play()

func _setup_speedlines() -> void:
	_speedlines = ColorRect.new()
	_speedlines.name = "SpeedLines"
	_speedlines.set_anchors_preset(Control.PRESET_FULL_RECT)
	_speedlines.mouse_filter = Control.MOUSE_FILTER_IGNORE
	var mat := ShaderMaterial.new()
	mat.shader = load("res://assets/shaders/speed_lines.gdshader")
	mat.set_shader_parameter("intensity", 0.0)
	_speedlines.material = mat
	_damage_layer.add_child(_speedlines)


func _setup_hit_marker() -> void:
	hit_marker = Control.new()
	hit_marker.set_anchors_preset(Control.PRESET_CENTER)
	hit_marker.modulate.a = 0.0 # Hidden by default
	_damage_layer.add_child(hit_marker)
	
	# Draw an X perfectly centered
	var length = 12
	var thickness = 2
	for angle in [PI/4, 3*PI/4, 5*PI/4, 7*PI/4]:
		var rect = ColorRect.new()
		rect.color = Color.WHITE
		rect.size = Vector2(length, thickness)
		rect.pivot_offset = rect.size / 2.0
		# Center the rect itself at (0,0) before offset
		var center_pos = -rect.size / 2.0
		# Move it outward along the angle so it doesn't cover the exact center dot
		rect.position = center_pos + Vector2(cos(angle), sin(angle)) * (length / 2.0)
		rect.rotation = angle
		hit_marker.add_child(rect)

	# Reload Ring
	reload_ring = load("res://ui/reload_ring.gd").new()
	reload_ring.set_anchors_preset(Control.PRESET_CENTER)
	_damage_layer.add_child(reload_ring)

func _setup_grapple() -> void:
	grapple_rope = MeshInstance3D.new()
	var rope_mesh = CylinderMesh.new()
	rope_mesh.top_radius = 0.04
	rope_mesh.bottom_radius = 0.04
	rope_mesh.height = 1.0 # Will be scaled dynamically
	
	var mat = StandardMaterial3D.new()
	mat.albedo_color = Color(0.1, 0.1, 0.1) # Dark grey cable
	mat.roughness = 0.8
	rope_mesh.material = mat
	
	grapple_rope.mesh = rope_mesh
	grapple_rope.visible = false
	get_tree().current_scene.call_deferred("add_child", grapple_rope)

func _setup_grenade_trajectory() -> void:
	trajectory_mesh = MultiMeshInstance3D.new()
	var mm = MultiMesh.new()
	mm.transform_format = MultiMesh.TRANSFORM_3D
	mm.instance_count = 60
	trajectory_mesh.multimesh = mm
	var dot_mesh = SphereMesh.new()
	dot_mesh.radius = 0.05
	dot_mesh.height = 0.1
	var dot_mat = StandardMaterial3D.new()
	dot_mat.albedo_color = Color(1.0, 1.0, 1.0, 0.5)
	dot_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
	dot_mat.shading_mode = BaseMaterial3D.SHADING_MODE_UNSHADED
	dot_mesh.material = dot_mat
	trajectory_mesh.multimesh.mesh = dot_mesh
	trajectory_mesh.visible = false
	get_tree().current_scene.call_deferred("add_child", trajectory_mesh)

var _last_hit_sound_time: int = 0

func spawn_damage_number(amount: float, hit_pos: Vector3) -> void:
	if not camera or not _damage_layer: return
	
	var label = load("res://ui/floating_damage_text.gd").new()
	label.text = str(round(amount))
	label.add_theme_font_size_override("font_size", 24)
	label.add_theme_color_override("font_color", Color(1.0, 0.6, 0.1))
	label.add_theme_color_override("font_outline_color", Color(0, 0, 0, 0.8))
	label.add_theme_constant_override("outline_size", 4)
	
	# Small random offset in 3D space so multiple pellets don't perfectly overlap
	var offset = Vector3(randf_range(-0.4, 0.4), randf_range(-0.4, 0.4), randf_range(-0.4, 0.4))
	label.target_pos = hit_pos + offset
	label.camera = camera
	
	_damage_layer.add_child(label)
	
	# Only play the hit sound and flash the marker once per frame (or roughly every 16ms)
	# This prevents the shotgun from stacking 8 hit sounds in a single frame.
	var now = Time.get_ticks_msec()
	if now - _last_hit_sound_time > 10:
		_last_hit_sound_time = now
		hit_player.play()
		
		if _hit_marker_tween and _hit_marker_tween.is_valid():
			_hit_marker_tween.kill()
			
		hit_marker.modulate.a = 1.0
		_hit_marker_tween = create_tween()
		_hit_marker_tween.tween_property(hit_marker, "modulate:a", 0.0, 0.4)

func apply_impulse(force: Vector3) -> void:
	velocity += force
	# Force an upward launch to break ground contact
	if force.y > 0.1:
		# Tiny upward bump helps move_and_slide detach from the floor
		global_position.y += 0.1

@rpc("any_peer", "call_local", "reliable")
func server_apply_impulse(force: Vector3) -> void:
	if not multiplayer.is_server(): return
	var sender = multiplayer.get_remote_sender_id()
	if sender != 1 and sender != str(name).to_int(): return
	# Movement is client-authoritative, so the impulse must land on the peer
	# that simulates this body.
	if is_multiplayer_authority():
		apply_impulse(force)
	else:
		authority_apply_impulse.rpc_id(get_multiplayer_authority(), force)

@rpc("any_peer", "call_local", "reliable")
func authority_apply_impulse(force: Vector3) -> void:
	if multiplayer.has_multiplayer_peer() and not multiplayer.multiplayer_peer is OfflineMultiplayerPeer:
		if multiplayer.get_remote_sender_id() != 1: return
	if is_multiplayer_authority():
		apply_impulse(force)

func take_damage(amount: float, _hit_pos: Vector3, _source: Node3D = null, impulse: Vector3 = Vector3.ZERO) -> void:
	var attacker_id = 0
	var weapon_name = "Killed"
	
	if _source:
		if _source.has_method("get_multiplayer_authority"):
			attacker_id = _source.get_multiplayer_authority()
		elif "owner_player" in _source and _source.owner_player:
			attacker_id = int(str(_source.owner_player.name))
		elif _source is CharacterBody3D:
			attacker_id = int(str(_source.name))
			
		if _source.has_method("get_weapon_name"):
			weapon_name = _source.get_weapon_name()
			
	# If this is singleplayer offline, just call it directly
	if not multiplayer.has_multiplayer_peer() or multiplayer.multiplayer_peer is OfflineMultiplayerPeer:
		rpc_take_damage(amount, _hit_pos, attacker_id, weapon_name, impulse)
	else:
		# Tell the server to handle the damage and broadcast it to everyone!
		server_take_damage.rpc_id(1, amount, _hit_pos, attacker_id, weapon_name, impulse)

@rpc("any_peer", "call_local", "unreliable")
func server_play_fire_effects(origin: Vector3, target_or_dir: Vector3, weapon_name: String, is_hitscan: bool) -> void:
	if not multiplayer.is_server(): return
	rpc_play_fire_effects.rpc(origin, target_or_dir, weapon_name, is_hitscan)

@rpc("any_peer", "call_local", "unreliable")
func rpc_play_fire_effects(origin: Vector3, target_or_dir: Vector3, _weapon_name: String, is_hitscan: bool) -> void:
	# Local player already spawned effects locally with 0 latency
	if is_multiplayer_authority(): return

	# Positional gunshot for the remote shooter — occlusion + reflections via
	# AudioManager make it locatable ("that came from behind the wooden wall").
	var am = get_tree().root.get_node_or_null("AudioManager")
	if am:
		var sid: String = am.weapon_sound_id(_weapon_name)
		if sid != "" and am.has_sound(sid):
			am.play_3d(sid, origin)

	# Visible shot kick on the remote shooter's model
	var rv = get_visual_model()
	if rv and rv.has_method("add_gun_recoil"):
		rv.add_gun_recoil()

	if is_hitscan:
		# Spawn a standalone tracer directly into the scene
		_spawn_remote_tracer(origin, target_or_dir)
	else:
		# Spawn a visual-only projectile flying from origin along the direction
		_spawn_remote_projectile(origin, target_or_dir, _weapon_name)

func _spawn_remote_tracer(origin: Vector3, target: Vector3) -> void:
	HitscanTracer.spawn_bolt(get_tree().current_scene, origin, target)

func _spawn_remote_projectile(origin: Vector3, fire_dir: Vector3, weapon_name: String) -> void:
	# Try to find the actual weapon to spawn its custom projectile so it looks identical!
	if camera:
		var wman = camera.get_node_or_null("WeaponManager")
		if wman:
			var target_weapon = null
			for w in wman.weapons.values():
				if "weapon_name" in w and w.weapon_name == weapon_name:
					target_weapon = w
					break
			if target_weapon and target_weapon.has_method("_spawn_custom_projectile"):
				target_weapon._spawn_custom_projectile(origin, fire_dir)
				return
				
	# Generic fallback if weapon not found (e.g. joined late and weapons didn't build yet)
	var proj = Node3D.new()
	proj.name = "RemoteProjectile"
	
	if weapon_name == "Plasma Gun":
		var mesh_instance = MeshInstance3D.new()
		var p_mesh = SphereMesh.new()
		p_mesh.radius = 0.08
		p_mesh.height = 0.16
		var mat = StandardMaterial3D.new()
		mat.albedo_color = Color(0.2, 0.6, 1.0)
		mat.emission_enabled = true
		mat.emission = Color(0.2, 0.6, 1.0)
		mat.emission_energy_multiplier = 5.0
		p_mesh.material = mat
		mesh_instance.mesh = p_mesh
		proj.add_child(mesh_instance)
		
		var light = OmniLight3D.new()
		light.light_color = Color(0.2, 0.6, 1.0)
		light.light_energy = 2.0
		light.omni_range = 4.0
		proj.add_child(light)
	else:
		# Generic rocket fallback
		var mesh_inst = MeshInstance3D.new()
		var p_mesh = CylinderMesh.new()
		p_mesh.top_radius = 0.0
		p_mesh.bottom_radius = 0.05
		p_mesh.height = 0.2
		var mat = StandardMaterial3D.new()
		mat.albedo_color = Color(0.8, 0.2, 0.2)
		mat.emission_enabled = true
		mat.emission = Color(1.5, 0.3, 0.1)
		p_mesh.material = mat
		mesh_inst.mesh = p_mesh
		mesh_inst.rotation.x = deg_to_rad(-90)
		proj.add_child(mesh_inst)
		
		var smoke = GPUParticles3D.new()
		var smoke_mat = ParticleProcessMaterial.new()
		smoke_mat.direction = Vector3(0, 0, 1)
		smoke_mat.spread = 5.0
		smoke_mat.initial_velocity_min = 0.0
		smoke_mat.initial_velocity_max = 0.5
		smoke_mat.gravity = Vector3(0, 0.5, 0)
		smoke.process_material = smoke_mat
		smoke.amount = 20
		smoke.lifetime = 0.5
		smoke.position = Vector3(0, 0, 0.1)
		
		var smoke_mesh = SphereMesh.new()
		smoke_mesh.radius = 0.04
		var smoke_mesh_mat = StandardMaterial3D.new()
		smoke_mesh_mat.albedo_color = Color(0.5, 0.5, 0.5, 0.6)
		smoke_mesh_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
		smoke_mesh.material = smoke_mesh_mat
		smoke.draw_pass_1 = smoke_mesh
		proj.add_child(smoke)
	
	# Orient the projectile in the direction of fire
	var up_vec = Vector3.UP
	if abs(fire_dir.normalized().dot(up_vec)) > 0.99:
		up_vec = Vector3.RIGHT
	
	get_tree().current_scene.add_child(proj)
	proj.global_position = origin
	proj.look_at(origin + fire_dir, up_vec)
	
	# Animate movement using tween at appropriate speed
	var speed = 35.0 if weapon_name != "Plasma Gun" else 80.0
	var end_pos = origin + fire_dir.normalized() * (speed * 5.0)
	var tween = get_tree().create_tween()
	tween.tween_property(proj, "global_position", end_pos, 5.0)
	tween.tween_callback(proj.queue_free)

@rpc("any_peer", "call_local", "reliable")
func server_play_explosion(pos: Vector3, radius: float) -> void:
	if not multiplayer.is_server(): return
	rpc_play_explosion.rpc(pos, radius)

@rpc("any_peer", "call_local", "reliable")
func rpc_play_explosion(pos: Vector3, radius: float) -> void:
	if is_multiplayer_authority(): return
	
	ExplosionVFX.spawn(get_tree(), pos, radius)

@rpc("any_peer", "call_local", "reliable")
func server_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_name: String, impulse: Vector3) -> void:
	if not multiplayer.is_server(): return

	# Broadcast damage event to all peers so the victim dies on all screens.
	# Knockback is applied inside rpc_take_damage on the victim's own peer,
	# since that peer simulates this body.
	rpc_take_damage.rpc(amount, hit_pos, attacker_id, weapon_name, impulse)

@rpc("any_peer", "call_local", "reliable")
func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_name: String, impulse: Vector3) -> void:
	if is_dead:
		if is_instance_valid(ragdoll_instance):
			ragdoll_instance.apply_initial_velocities(Vector3.ZERO, impulse)
		return
		
	# Show damage number for the attacker
	if not multiplayer.has_multiplayer_peer() or attacker_id == multiplayer.get_unique_id():
		if is_multiplayer_authority():
			spawn_damage_number(amount, hit_pos)
		else:
			var my_node = get_parent().get_node_or_null(str(attacker_id))
			if my_node and my_node.has_method("spawn_damage_number"):
				my_node.spawn_damage_number(amount, hit_pos)
				
	# Show damage indicator and screen shake for the victim
	if is_multiplayer_authority() and amount > 0.0 and (not multiplayer.has_multiplayer_peer() or attacker_id != multiplayer.get_unique_id()):
		_show_damage_indicator(hit_pos)
	
	if attacker_id != 0:
		recent_attackers[attacker_id] = Time.get_ticks_msec() / 1000.0

	# Flinch: the victim's model plays a hit reaction on every screen.
	if amount > 0.0:
		var vm = get_visual_model()
		if vm and vm.has_method("play_oneshot"):
			vm.play_oneshot("Hit", 0.3)

	# Knockback lands on the simulating peer (movement is client-authoritative)
	if is_multiplayer_authority() and impulse.length_squared() > 0.01:
		apply_impulse(impulse)

	time_since_last_damage = 0.0
	
	if shield > 0.0:
		if shield >= amount:
			shield -= amount
			amount = 0.0
		else:
			amount -= shield
			shield = 0.0
			
	if amount > 0.0:
		health -= amount
		if health <= 0.0:
			health = 0.0
			die(impulse)
			
			if multiplayer.is_server():
				var nm = get_node_or_null("/root/NetworkManager")
				if nm and multiplayer.has_multiplayer_peer():
					var killer_id = attacker_id
					
					var assist_ids: Array = []
					var now = Time.get_ticks_msec() / 1000.0
					for aid in recent_attackers.keys():
						if aid != killer_id and now - recent_attackers[aid] <= 10.0:
							assist_ids.append(aid)
					
					var real_victim_name = "Player " + str(name)
					if "player_name" in self and self.player_name != "":
						real_victim_name = self.player_name
					elif str(name).to_int() == 1:
						real_victim_name = "Host"
						
					if nm.has_method("register_kill"):
						var victim_id = str(name).to_int()
						if victim_id == 0:
							victim_id = 1 # Fallback to host if something is weird
						nm.register_kill.rpc(victim_id, killer_id, weapon_name, real_victim_name, assist_ids)

func _show_damage_indicator(hit_pos: Vector3) -> void:
	if not _damage_layer: return
	
	var indicator = Polygon2D.new()
	indicator.polygon = PackedVector2Array([
		Vector2(0, -100),
		Vector2(-20, -75),
		Vector2(20, -75)
	])
	indicator.color = Color(1.0, 0.0, 0.0, 0.8)
	indicator.position = get_viewport().get_visible_rect().size / 2.0
	
	var forward = -global_transform.basis.z
	forward.y = 0.0
	if forward.length_squared() > 0.01:
		forward = forward.normalized()
		var right = global_transform.basis.x
		right.y = 0.0
		right = right.normalized()
		
		var dir_to_hit = (hit_pos - global_position)
		dir_to_hit.y = 0.0
		if dir_to_hit.length_squared() > 0.01:
			dir_to_hit = dir_to_hit.normalized()
			var angle = atan2(dir_to_hit.dot(right), dir_to_hit.dot(forward))
			indicator.rotation = angle
			
	_damage_layer.add_child(indicator)
	var tween = create_tween()
	tween.tween_property(indicator, "color:a", 0.0, 1.0)
	tween.tween_callback(indicator.queue_free)
	
	if camera:
		var shake_tween = create_tween()
		shake_tween.tween_property(camera, "h_offset", randf_range(-0.2, 0.2), 0.05)
		shake_tween.parallel().tween_property(camera, "v_offset", randf_range(-0.2, 0.2), 0.05)
		shake_tween.chain().tween_property(camera, "h_offset", 0.0, 0.05)
		shake_tween.parallel().tween_property(camera, "v_offset", 0.0, 0.05)

func get_weapon_name() -> String:
	if camera:
		var wman = camera.get_node_or_null("WeaponManager")
		if wman:
			var slot = wman.get("active_slot")
			if slot != null and wman.weapons.has(slot):
				var w = wman.weapons[slot]
				if w and w.has_method("get_weapon_name"):
					return w.get_weapon_name()
				elif w:
					var p = ""
					if w.has_meta("script_path"):
						p = w.get_meta("script_path").get_file().get_basename()
					elif w.get_script():
						p = w.get_script().resource_path.get_file().get_basename()
					else:
						p = "Killed"
					return p.capitalize()
	return "Killed"

func _ensure_machine() -> MovementStateMachine:
	if is_instance_valid(_machine):
		return _machine
	if has_node("MovementStateMachine"):
		var node = $MovementStateMachine
		if node and node.has_method("switch_to") and node.has_method("register_chain_mechanic"):
			_machine = node
			return _machine
	_machine = null
	return null

func _physics_process(_delta: float) -> void:
	# The owning peer reads input and feeds its own state machine directly.
	# No server round-trip: movement responds on the same frame it's pressed.
	if is_multiplayer_authority():
		var raw_input := Vector2.ZERO
		var input_jump := false
		var input_jump_just := false
		var input_crouch := false
		var input_dash := false
		var input_grapple := false
		var input_grapple_just := false
		var world_dir := Vector3.ZERO
		
		if Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
			raw_input = Input.get_vector("move_left", "move_right", "move_forward", "move_back")
			var forward := -global_transform.basis.z
			forward.y = 0.0
			forward = forward.normalized()
			var right := global_transform.basis.x
			right.y = 0.0
			right = right.normalized()

			world_dir = (forward * (-raw_input.y) + right * raw_input.x)
			if world_dir.length_squared() > 1.0:
				world_dir = world_dir.normalized()
				
			input_jump = Input.is_action_pressed("jump")
			input_jump_just = Input.is_action_just_pressed("jump")
			input_crouch = Input.is_action_pressed("crouch")
			input_dash = Input.is_action_just_pressed("dash")
			input_grapple = Input.is_action_pressed("grapple")
			input_grapple_just = Input.is_action_just_pressed("grapple")
			
			if Input.is_action_just_pressed("toggle_flashlight") and is_instance_valid(flashlight):
				flashlight.visible = !flashlight.visible

			if Input.is_action_just_pressed("toggle_camera_view"):
				set_third_person(not third_person)

			# Dance emote (B): toggles while grounded and idle-ish; any
			# movement/jump/crouch input breaks it.
			if Input.is_action_just_pressed("emote"):
				var m := _ensure_machine()
				var slow: bool = Vector2(velocity.x, velocity.z).length() < 1.0
				if not synced_is_dancing and m and m.current_state == "ground" and slow:
					synced_is_dancing = true
				else:
					synced_is_dancing = false
		if synced_is_dancing:
			var m2 := _ensure_machine()
			var moving := raw_input.length() > 0.1 or input_jump or input_crouch or input_dash
			var airborne: bool = m2 and m2.current_state != "ground"
			if moving or airborne:
				synced_is_dancing = false

		var machine := _ensure_machine()
		if machine:
			machine.input_dir = raw_input
			machine.wish_dir_world = world_dir
			machine.input_jump_pressed = input_jump
			machine.input_jump_just_pressed = input_jump_just
			machine.input_crouch = input_crouch
			machine.input_dash = input_dash
			machine.input_grapple = input_grapple
			machine.input_grapple_just_pressed = input_grapple_just

	var speed = velocity.length()
	var wind_factor = clampf((speed - 10.0) / 25.0, 0.0, 1.0)
	wind_player.volume_db = lerpf(-40.0, -15.0, wind_factor)
	if not wind_player.playing and wind_factor > 0.0:
		wind_player.play()

	# Anime speed lines: fade in past ~1.2x walk speed, spike on dash.
	if is_instance_valid(_speedlines):
		_speedline_burst = maxf(_speedline_burst - _delta * 2.5, 0.0)
		var hs := Vector2(velocity.x, velocity.z).length()
		var speed_intensity := clampf((hs - params.walk_speed * 1.2) / 12.0, 0.0, 0.85)
		var target := maxf(speed_intensity, _speedline_burst)
		var mat := _speedlines.material as ShaderMaterial
		var cur: float = mat.get_shader_parameter("intensity")
		mat.set_shader_parameter("intensity", lerpf(cur, target, 1.0 - exp(-10.0 * _delta)))

	var sm := _ensure_machine()
	if not sm:
		return

	# The owning peer publishes its grapple state for everyone's rope visuals
	if is_multiplayer_authority():
		synced_grapple_point = sm.grapple_point
		synced_is_grapple_shooting = sm.is_grapple_shooting

	# Update grapple rope visuals (runs on all clients for smooth interpolation)
	if (synced_movement_state == "grapple" or synced_is_grapple_shooting) and camera:
		grapple_rope.visible = true
		var start_pos = camera.global_position + camera.global_transform.basis * Vector3(0.3, -0.3, -0.15)
		var end_pos = synced_grapple_point
		var dist = start_pos.distance_to(end_pos)
		if dist > 0.01:
			grapple_rope.global_position = (start_pos + end_pos) / 2.0
			var up_vec = Vector3.UP
			var dir = (end_pos - start_pos).normalized()
			if abs(dir.dot(up_vec)) > 0.99:
				up_vec = Vector3.RIGHT
			grapple_rope.transform.basis = Basis.looking_at(dir, up_vec) * Basis.from_euler(Vector3(PI/2.0, 0, 0))
			grapple_rope.scale = Vector3(1.0, dist, 1.0)
	else:
		if grapple_rope:
			grapple_rope.visible = false
			
	if synced_movement_state == "grapple" and velocity.length() > 5.0:
		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -15.0, _delta * 10.0)
	else:
		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -80.0, _delta * 15.0)

	# Local player's aim-down-sights state (drives the model's weapon raise).
	synced_is_ads = _read_ads()

	# Drive the visual model (skinned GLB or procedural) from local state
	var visual = get_visual_model()
	if visual:
		var h_speed = Vector2(velocity.x, velocity.z).length()
		visual.update_state(sm.current_state, h_speed, sm.input_crouch)
		if visual.has_method("set_locomotion"):
			var d := _local_move_dir()
			visual.set_locomotion(d.x, d.y, 1.0 if synced_is_ads else 0.0)
		if visual.has_method("set_wall_side"):
			visual.set_wall_side(sm.wall_side)
		if visual.has_method("set_dancing"):
			visual.set_dancing(synced_is_dancing)
		if visual.has_method("set_grapple_target") and sm.current_state == "grapple":
			visual.set_grapple_target(synced_grapple_point)

	# Publish state for remote peers
	synced_movement_state = sm.current_state
	synced_movement_speed = Vector2(velocity.x, velocity.z).length()
	synced_is_crouching = sm.input_crouch
	synced_wall_side = sm.wall_side
	synced_position = position
	synced_velocity = velocity


## Movement direction relative to facing: x = strafe (+right), y = forward
## (+forward). Derived from velocity so it works for local and remote players.
func _local_move_dir() -> Vector2:
	var hspeed := Vector2(velocity.x, velocity.z).length()
	if hspeed < 0.5:
		return Vector2.ZERO
	var local_vel := global_transform.basis.inverse() * velocity
	return Vector2(local_vel.x / hspeed, -local_vel.z / hspeed)


## Whether the local player's active weapon is aiming down sights.
func _read_ads() -> bool:
	if not is_instance_valid(camera):
		return false
	var wman = camera.get_node_or_null("WeaponManager")
	if wman and "active_slot" in wman and wman.weapons.has(wman.active_slot):
		var w = wman.weapons[wman.active_slot]
		if w and "is_ads" in w:
			return w.is_ads
	return false


func _on_movement_event(ev: String, data: Dictionary) -> void:
	if ev == "chain_updated":
		chain_updated.emit(data.count, data.bonus)
	elif ev == "grapple_shoot":
		grapple_shoot_player.play()
	elif ev == "grapple_latch":
		grapple_latch_player.play()
	elif ev == "dash":
		_speedline_burst = 1.0
	elif ev == "land":
		if land_player:
			var heavy: bool = data.get("heavy", false)
			land_player.pitch_scale = (0.8 if heavy else 1.0) * randf_range(0.95, 1.05)
			land_player.volume_db = 2.0 if heavy else -3.0
			land_player.play()

func _process(delta: float) -> void:
	# Remote players: interpolate toward the owner's synced transform and
	# apply synced movement state to their visual model
	if not is_multiplayer_authority():
		if synced_loadout_ready and not has_meta("remote_weapons_built"):
			set_meta("remote_weapons_built", true)
			var wman = camera.get_node_or_null("WeaponManager")
			if wman and wman.has_method("_build_remote_loadout"):
				wman._build_remote_loadout(synced_loadout_p1, synced_loadout_p2, synced_loadout_sp, synced_loadout_melee)

		# Skin can arrive/change after spawn — rebuild the model when it does
		if synced_skin_id != _applied_skin_id:
			_apply_skin_model(synced_skin_id)

		# Snapshot interpolation: chase the owner's last known position with a
		# little velocity extrapolation so fast targets stay accurate between
		# packets. Snap on big desyncs (respawn/teleport).
		if not is_dead and synced_position != Vector3.ZERO:
			var target := synced_position + synced_velocity * NET_EXTRAPOLATION
			if position.distance_to(target) > NET_SNAP_DISTANCE:
				position = target
			else:
				position = position.lerp(target, 1.0 - exp(-NET_LERP_RATE * delta))
			velocity = synced_velocity

		var visual = get_visual_model()
		if visual:
			visual.update_state(synced_movement_state, synced_movement_speed, synced_is_crouching)
			if visual.has_method("set_locomotion"):
				var d := _local_move_dir()
				visual.set_locomotion(d.x, d.y, 1.0 if synced_is_ads else 0.0)
			if visual.has_method("set_wall_side"):
				visual.set_wall_side(synced_wall_side)
			if visual.has_method("set_dancing"):
				visual.set_dancing(synced_is_dancing)
			if visual.has_method("set_grapple_target") and synced_movement_state == "grapple":
				visual.set_grapple_target(synced_grapple_point)
			# Upper body follows the owner's synced camera pitch
			if visual.has_method("set_aim_pitch") and head_pivot:
				visual.set_aim_pitch(head_pivot.rotation.x)
			# Replayed one-shot actions (reload, grenade throw)
			if visual.has_method("play_action") and synced_action_seq != _last_action_seq:
				_last_action_seq = synced_action_seq
				visual.play_action(synced_action)
			# Check for weapon changes
			if synced_weapon_path != "" and synced_weapon_path != visual.get_meta("current_weapon_path", ""):
				visual.set_weapon(synced_weapon_path)
				visual.set_meta("current_weapon_path", synced_weapon_path)

		# Positional footsteps for remote players (their movement states don't
		# run here). Occlusion via AudioManager makes them read through walls
		# correctly — the classic "someone's above me on the wooden platform".
		if not is_dead and synced_movement_state == "ground" and synced_movement_speed > 1.0:
			_remote_footstep_timer -= delta
			if _remote_footstep_timer <= 0.0:
				var am = get_tree().root.get_node_or_null("AudioManager")
				if am and am.has_sound("footstep"):
					am.play_3d("footstep", global_position + Vector3(0, -0.8, 0), -8.0)
				_remote_footstep_timer = maxf(0.2, 3.0 / synced_movement_speed)
		else:
			_remote_footstep_timer = 0.0
		return
		
	# Local third-person model: aim pitch + reload one-shot (also broadcast
	# to remote peers via the synced action counter)
	var lvisual = get_visual_model()
	if lvisual:
		if lvisual.has_method("set_aim_pitch") and head_pivot:
			lvisual.set_aim_pitch(head_pivot.rotation.x)
		var lw = _active_weapon()
		var now_reloading: bool = lw != null and "reloading" in lw and lw.reloading
		if now_reloading and not _was_reloading:
			_trigger_action("reload")
		_was_reloading = now_reloading
		# Shot kick on our OWN third-person model. server_play_fire_effects
		# only fires for REMOTE shooters, so without this the owner sees no
		# recoil at all in third person. Detect it from the ammo counter.
		var ammo_now: int = -1
		if lw:
			if "current_ammo" in lw:
				ammo_now = lw.current_ammo
			elif "shells" in lw:
				ammo_now = lw.shells
		if ammo_now >= 0 and _last_local_ammo >= 0 and ammo_now < _last_local_ammo \
				and lvisual.has_method("add_gun_recoil"):
			lvisual.add_gun_recoil()
		_last_local_ammo = ammo_now

	# Update UI
	if is_instance_valid(health_bar):
		health_bar.value = health
		health_label.text = "%d / %d" % [ceil(health), max_health]
	if is_instance_valid(shield_bar):
		shield_bar.value = shield
		shield_label.text = "%d / %d" % [ceil(shield), max_shield]
		
	# Update Reload Ring
	if is_instance_valid(reload_ring) and is_instance_valid(camera):
		var wman = camera.get_node_or_null("WeaponManager")
		if wman:
			var slot = wman.get("active_slot")
			if slot != null and wman.weapons.has(slot):
				var w = wman.weapons[slot]
				if "reloading" in w and w.reloading and "reload_timer" in w and "reload_time" in w:
					reload_ring.progress = 1.0 - (w.reload_timer / w.reload_time)
				else:
					reload_ring.progress = 0.0
			else:
				reload_ring.progress = 0.0
				
	if is_multiplayer_authority() and not is_dead:
		if is_holding_grenade and grenades > 0:
			_draw_trajectory()
		elif is_instance_valid(trajectory_mesh):
			trajectory_mesh.visible = false
		
	if is_dead:
		# Continuously follow the ragdoll torso
		if is_instance_valid(ragdoll_instance) and is_instance_valid(camera):
			var torso = ragdoll_instance.torso_body
			if is_instance_valid(torso) and ragdoll_instance.has_meta("spring_arm"):
				var spring_arm = ragdoll_instance.get_meta("spring_arm")
				if is_instance_valid(spring_arm):
					# Follow torso position exactly to avoid lerp bobbing
					spring_arm.global_position = torso.global_position
					
		if death_screen and death_screen.visible:
			if Input.is_mouse_button_pressed(MOUSE_BUTTON_LEFT) or Input.is_mouse_button_pressed(MOUSE_BUTTON_RIGHT) or Input.is_key_pressed(KEY_SPACE) or Input.is_key_pressed(KEY_ENTER) or Input.is_key_pressed(KEY_ESCAPE) == false and (Input.is_action_just_pressed("ui_accept") or Input.is_action_just_pressed("jump") or Input.is_action_just_pressed("fire")):
				_on_respawn_pressed()
				
		return
		
	# Shield recharge logic
	time_since_last_damage += delta
	if time_since_last_damage >= 5.0 and shield < max_shield:
		shield += 20.0 * delta
		if shield > max_shield:
			shield = max_shield

func _setup_hud() -> void:
	var margin = MarginContainer.new()
	margin.set_anchors_preset(Control.PRESET_BOTTOM_LEFT)
	margin.offset_left = 20
	margin.offset_bottom = -20
	margin.grow_vertical = Control.GROW_DIRECTION_BEGIN
	
	var vbox = VBoxContainer.new()
	margin.add_child(vbox)
	
	# Add Match HUD overlay
	if is_multiplayer_authority():
		var match_hud_scene = load("res://ui/match_hud.tscn")
		if match_hud_scene:
			var match_hud = match_hud_scene.instantiate()
			add_child(match_hud)
	
	# Shield Bar (Top)
	var shield_box = VBoxContainer.new()
	var s_title = Label.new()
	s_title.text = "SHIELD"
	s_title.add_theme_font_size_override("font_size", 12)
	s_title.add_theme_color_override("font_color", Color(0.4, 0.7, 1.0))
	shield_box.add_child(s_title)
	
	shield_bar = ProgressBar.new()
	shield_bar.custom_minimum_size = Vector2(200, 20)
	shield_bar.max_value = max_shield
	shield_bar.value = shield
	shield_bar.show_percentage = false
	
	var s_sb = StyleBoxFlat.new()
	s_sb.bg_color = Color(0.1, 0.4, 0.8)
	shield_bar.add_theme_stylebox_override("fill", s_sb)
	
	shield_label = Label.new()
	shield_label.text = "100 / 100"
	shield_label.set_anchors_preset(Control.PRESET_CENTER)
	shield_bar.add_child(shield_label)
	
	shield_box.add_child(shield_bar)
	vbox.add_child(shield_box)
	
	# Spacer
	vbox.add_child(Control.new())
	
	# Health Bar (Bottom)
	var health_box = VBoxContainer.new()
	var h_title = Label.new()
	h_title.text = "HEALTH"
	h_title.add_theme_font_size_override("font_size", 12)
	h_title.add_theme_color_override("font_color", Color(1.0, 0.3, 0.3))
	health_box.add_child(h_title)
	
	health_bar = ProgressBar.new()
	health_bar.custom_minimum_size = Vector2(200, 20)
	health_bar.max_value = max_health
	health_bar.value = health
	health_bar.show_percentage = false
	
	var h_sb = StyleBoxFlat.new()
	h_sb.bg_color = Color(0.8, 0.1, 0.1)
	health_bar.add_theme_stylebox_override("fill", h_sb)
	
	health_label = Label.new()
	health_label.text = "100 / 100"
	health_label.set_anchors_preset(Control.PRESET_CENTER)
	health_bar.add_child(health_label)
	
	health_box.add_child(health_bar)
	vbox.add_child(health_box)
	
	_damage_layer.add_child(margin)
	
	# Setup Death Screen
	death_screen = ColorRect.new()
	death_screen.color = Color(0, 0, 0, 0.7)
	death_screen.set_anchors_preset(Control.PRESET_FULL_RECT)
	death_screen.visible = false
	
	var center = CenterContainer.new()
	center.set_anchors_preset(Control.PRESET_FULL_RECT)
	death_screen.add_child(center)
	
	var d_vbox = VBoxContainer.new()
	d_vbox.add_theme_constant_override("separation", 20)
	center.add_child(d_vbox)
	
	var d_title = Label.new()
	d_title.text = "SYSTEM FAILURE"
	d_title.add_theme_font_size_override("font_size", 48)
	d_title.add_theme_color_override("font_color", Color(1.0, 0.2, 0.2))
	d_vbox.add_child(d_title)
	
	var respawn_label = Label.new()
	respawn_label.text = "PRESS ANY KEY TO REBOOT"
	respawn_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	respawn_label.add_theme_font_size_override("font_size", 24)
	d_vbox.add_child(respawn_label)
	
	var tw = create_tween().set_loops()
	tw.tween_property(respawn_label, "modulate:a", 0.2, 0.8)
	tw.tween_property(respawn_label, "modulate:a", 1.0, 0.8)
	
	if is_multiplayer_authority():
		_damage_layer.add_child(death_screen)

func die(impulse: Vector3 = Vector3.ZERO) -> void:
	if is_dead: return
	is_dead = true

	# Return to first person so the toggle state doesn't fight the death cam.
	if is_multiplayer_authority() and third_person:
		set_third_person(false)

	# Disable movement state machine inputs
	if _machine:
		_machine.process_mode = Node.PROCESS_MODE_DISABLED
		
	# Hide old animated model
	var humanoid = get_node_or_null("HumanoidModel")
	if humanoid:
		humanoid.visible = false
	var skinned = get_node_or_null("SkinnedModel")
	if skinned:
		skinned.visible = false
		
	# Disable collision so player doesn't block bullets
	var col = get_node_or_null("CollisionShape3D")
	if col:
		col.set_deferred("disabled", true)
		
	# Spawn true physics ragdoll
	death_count += 1
	var ragdoll = load("res://characters/procedural_ragdoll.gd").new()
	ragdoll.name = "Ragdoll_%s_%d" % [self.name, death_count]
	ragdoll_instance = ragdoll
	get_tree().current_scene.add_child(ragdoll)
	ragdoll.global_transform = global_transform
	ragdoll.build_ragdoll(Color(0.0, 0.75, 0.75))  # Miku teal — matches player 1 skin
	
	# Wait a frame for physics to initialize then apply velocity
	get_tree().create_timer(0.01).timeout.connect(_apply_ragdoll_velocity.bind(ragdoll, velocity, impulse))
	
	# Move camera to 3rd person view using SpringArm3D
	if is_instance_valid(camera):
		# Hide the weapon manager so it isn't floating in front of the 3rd person camera
		var wman = camera.get_node_or_null("WeaponManager")
		if wman:
			wman.visible = false
			wman.process_mode = Node.PROCESS_MODE_DISABLED
			
		var cam_trans = camera.global_transform
		camera.get_parent().remove_child(camera)
		
		# Determine fixed offset direction for camera to follow from
		var back_dir = cam_trans.basis.z.normalized()
		back_dir.y = 0 # Flatten it
		if back_dir.length_squared() < 0.1:
			back_dir = Vector3.BACK
		else:
			back_dir = back_dir.normalized()
			
		var spring_arm = SpringArm3D.new()
		spring_arm.name = "DeathSpringArm"
		spring_arm.spring_length = 1.5
		spring_arm.margin = 0.5
		
		# Give it collision capability against the world but ignore the ragdoll shapes
		spring_arm.collision_mask = 1 # Environment mask
		for child in ragdoll.get_children():
			if child is CollisionObject3D:
				spring_arm.add_excluded_object(child.get_rid())
		
		get_tree().current_scene.add_child(spring_arm)
		
		# Put the arm at the torso's current position
		spring_arm.global_position = ragdoll.torso_body.global_position
		
		# Calculate upper-right position
		var right_dir = back_dir.cross(Vector3.UP).normalized()
		if right_dir.length_squared() < 0.1:
			right_dir = Vector3.RIGHT
			
		# The vector only defines direction, length is controlled by spring_length
		var desired_cam_pos = spring_arm.global_position + back_dir * 2.5 + right_dir * 1.5 + Vector3.UP * 1.5
		
		# SpringArm3D extends along its local +Z axis.
		# look_at() points the local -Z axis at the target.
		# To point +Z at desired_cam_pos, we must look_at the OPPOSITE direction.
		var opposite_dir = spring_arm.global_position + (spring_arm.global_position - desired_cam_pos)
		spring_arm.look_at(opposite_dir, Vector3.UP)
		
		spring_arm.add_child(camera)
		
		# Since +Z points outwards to the camera, -Z points inwards to the torso.
		# Camera3D natively looks down -Z. Setting rotation to ZERO makes it perfectly look at the torso!
		camera.position = Vector3.ZERO
		camera.rotation = Vector3.ZERO
		
		ragdoll_instance.set_meta("spring_arm", spring_arm)
	
	# Show death screen
	if is_multiplayer_authority():
		death_screen.visible = true
		set_process_input(true)

func _apply_ragdoll_velocity(ragdoll, l_vel: Vector3, imp: Vector3) -> void:
	if is_instance_valid(ragdoll) and ragdoll.has_method("apply_initial_velocities"):
		ragdoll.apply_initial_velocities(l_vel, imp)

func _input(event: InputEvent) -> void:
	if not is_multiplayer_authority(): return
	if is_dead and death_screen and death_screen.visible:
		if event is InputEventKey or event is InputEventMouseButton or event is InputEventJoypadButton:
			if event.is_pressed() and not event.is_echo():
				_on_respawn_pressed()
	
	if not is_dead and Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
		if event.is_action_pressed("grenade") and grenades > 0:
			is_holding_grenade = true
		elif event.is_action_released("grenade") and is_holding_grenade:
			is_holding_grenade = false
			_throw_grenade()

func _draw_trajectory() -> void:
	if not camera or not trajectory_mesh: return
	trajectory_mesh.visible = true
	
	var throw_speed = 20.0
	var throw_up_speed = 5.0
	var throw_vel = camera.global_transform.basis.z * -throw_speed + Vector3.UP * throw_up_speed + velocity
	var gravity = 15.0 # Typical default
	var current_pos = camera.global_position + camera.global_transform.basis.z * -0.5
	var time_step = 0.05
	var bounciness = 0.5
	
	var space_state = get_world_3d().direct_space_state
	
	for i in range(trajectory_mesh.multimesh.instance_count):
		var t = Transform3D(Basis(), current_pos)
		trajectory_mesh.multimesh.set_instance_transform(i, t)
		
		var next_vel = throw_vel
		next_vel.y -= gravity * time_step
		var next_pos = current_pos + throw_vel * time_step
		
		var query = PhysicsRayQueryParameters3D.create(current_pos, next_pos)
		query.exclude = [get_rid()]
		var hit = space_state.intersect_ray(query)
		
		if hit:
			current_pos = hit.position + hit.normal * 0.05
			throw_vel = next_vel.bounce(hit.normal) * bounciness
		else:
			current_pos = next_pos
			throw_vel = next_vel

## The local player's currently equipped weapon node (null if none).
func _active_weapon():
	if not is_instance_valid(camera):
		return null
	var wman = camera.get_node_or_null("WeaponManager")
	if wman and "active_slot" in wman and wman.weapons.has(wman.active_slot):
		return wman.weapons[wman.active_slot]
	return null


## Play a named one-shot on the local model and broadcast it to peers.
func _trigger_action(action: String) -> void:
	synced_action = action
	synced_action_seq += 1
	var v = get_visual_model()
	if v and v.has_method("play_action"):
		v.play_action(action)


func _throw_grenade() -> void:
	if grenades <= 0: return
	grenades -= 1
	_trigger_action("throw")
	
	var throw_speed = 20.0
	var throw_up_speed = 5.0
	var throw_vel = camera.global_transform.basis.z * -throw_speed + Vector3.UP * throw_up_speed + velocity
	var spawn_pos = camera.global_position + camera.global_transform.basis.z * -0.5
	
	if multiplayer.has_multiplayer_peer() and not (multiplayer.multiplayer_peer is OfflineMultiplayerPeer):
		server_spawn_grenade.rpc_id(1, spawn_pos, throw_vel)
	else:
		_spawn_grenade_local(spawn_pos, throw_vel, 1)

@rpc("any_peer", "call_local", "reliable")
func server_spawn_grenade(pos: Vector3, vel: Vector3) -> void:
	if not multiplayer.is_server(): return
	var id = multiplayer.get_remote_sender_id()
	client_spawn_grenade.rpc(pos, vel, id)

@rpc("authority", "call_local", "reliable")
func client_spawn_grenade(pos: Vector3, vel: Vector3, owner_id: int) -> void:
	_spawn_grenade_local(pos, vel, owner_id)

func _spawn_grenade_local(pos: Vector3, vel: Vector3, owner_id: int) -> void:
	var g_scene = load("res://weapons/grenade_projectile.gd")
	if not g_scene: return
	var g = g_scene.new()
	# Set position before adding to tree to avoid global_transform warning
	g.position = pos
	g.velocity = vel
	
	var p = null
	if owner_id == multiplayer.get_unique_id():
		p = self
	else:
		var root = get_tree().current_scene
		if root.has_node("Players/" + str(owner_id)):
			p = root.get_node("Players/" + str(owner_id))
	g.owner_player = p
	get_tree().current_scene.add_child(g)

func _on_respawn_pressed() -> void:
	if death_screen:
		death_screen.visible = false
	if multiplayer.is_server():
		var spawn_pos = Vector3(randf_range(-5, 5), 5, randf_range(-5, 5))
		rpc_respawn.rpc(spawn_pos)
	else:
		rpc_request_respawn.rpc_id(1)

var _last_respawn_request_time: float = 0.0

@rpc("any_peer", "call_local", "reliable")
func rpc_request_respawn() -> void:
	if not multiplayer.is_server():
		return
	var sender_id = multiplayer.get_remote_sender_id()
	if sender_id != 1 and sender_id != str(name).to_int():
		return
		
	var now = Time.get_ticks_msec() / 1000.0
	if now - _last_respawn_request_time < 0.5:
		return
	_last_respawn_request_time = now
		
	if is_dead:
		var spawn_pos = Vector3(randf_range(-5, 5), 5, randf_range(-5, 5))
		rpc_respawn.rpc(spawn_pos)
	else:
		# Deal 9999 damage to trigger the full death sequence locally and over the network
		take_damage(9999, global_position, null, Vector3.ZERO)

@rpc("any_peer", "call_local", "reliable")
func rpc_respawn(spawn_pos: Vector3) -> void:
	if is_dead:
		is_dead = false
		health = max_health
		shield = max_shield
		time_since_last_damage = 0.0
		grenades = 2
		is_holding_grenade = false
		
		if is_instance_valid(ragdoll_instance):
			if ragdoll_instance.has_meta("spring_arm"):
				var sa = ragdoll_instance.get_meta("spring_arm")
				if is_instance_valid(sa):
					sa.queue_free()
			ragdoll_instance.queue_free()
		
		visible = true
		process_mode = Node.PROCESS_MODE_INHERIT
		
		# Restore camera parent
		if is_instance_valid(camera) and is_instance_valid(head_pivot):
			var p = camera.get_parent()
			if p != head_pivot:
				p.remove_child(camera)
				head_pivot.add_child(camera)
				camera.position = Vector3.ZERO
				camera.rotation = Vector3.ZERO
				
		# Re-enable movement state machine
		if _machine:
			_machine.process_mode = Node.PROCESS_MODE_INHERIT
			
		# Re-enable collision
		var col = get_node_or_null("CollisionShape3D")
		if col:
			col.set_deferred("disabled", false)
			
		var visual_model = get_visual_model()
		if visual_model:
			visual_model.visible = true
		var humanoid_model = get_node_or_null("HumanoidModel")
		if humanoid_model and humanoid_model != visual_model:
			humanoid_model.visible = not is_instance_valid(skinned_model)

	# Everyone applies the broadcast spawn position; the owning peer also
	# resets its synced transform so remotes snap instead of lerping across
	# the map.
	position = spawn_pos
	velocity = Vector3.ZERO
	if is_multiplayer_authority():
		synced_position = spawn_pos
		synced_velocity = Vector3.ZERO
		
	# Local client resets UI and rebuilds weapons for their view
	if is_multiplayer_authority():
		if death_screen:
			death_screen.visible = false
		
		# Optional: reset weapons
		var wman = camera.get_node_or_null("WeaponManager") if camera else null
		if wman:
			wman.visible = true
			wman.process_mode = Node.PROCESS_MODE_INHERIT
			var cv = wman.get("canvas_layer")
			if cv:
				cv.visible = true
			if wman.has_method("_build_loadout"):
				wman._build_loadout()