Papay-Shooter/weapons/nail_gun.gd

extends BaseProjectileWeapon
class_name NailGun

func _init() -> void:
	weapon_name = "Nail Gun"
	reload_style = "cell"
	fire_rate = 0.06 # Very fast (1000 RPM)
	max_ammo = 60
	reload_time = 2.0
	base_damage = 18.0
	min_damage = 10.0
	falloff_start = 20.0
	max_range = 100.0
	automatic = true
	spread_angle = 0.02
	projectile_speed = 90.0 # Extremely fast, less lead and drop
	projectile_gravity = 5.0 # Slight drop

func _build_model() -> void:
	position = Vector3(0.3, -0.3, -0.604)

	var model_scene = load("res://assets/weapons/nailgun/source/Sopra.fbx")
	if model_scene:
		var model = model_scene.instantiate()
		model_root.add_child(model)
		model.scale = Vector3(0.06, 0.06, 0.06)
		model.rotation_degrees.y = 180
		for light in model.find_children("*", "Light3D", true, false):
			light.queue_free()

		var mat = StandardMaterial3D.new()
		mat.albedo_texture = load("res://assets/weapons/nailgun/textures/Base_texture.png")
		mat.normal_enabled = true
		mat.normal_texture = load("res://assets/weapons/nailgun/textures/Normal_texture.png")
		mat.metallic = 1.0
		mat.metallic_texture = load("res://assets/weapons/nailgun/textures/Metallic_texture.png")
		mat.roughness_texture = load("res://assets/weapons/nailgun/textures/Roughness_texture.png")
		mat.ao_enabled = true
		mat.ao_texture = load("res://assets/weapons/nailgun/textures/internal_ground_ao_texture.jpeg")

		for child in model.find_children("*", "MeshInstance3D", true, false):
			child.set_surface_override_material(0, mat)

	# Muzzle Flash (Sparks)
	muzzle_flash = OmniLight3D.new()
	muzzle_flash.light_color = Color(1.0, 0.9, 0.6)
	muzzle_flash.light_energy = 0.0
	muzzle_flash.omni_range = 3.0
	muzzle_flash.position = Vector3(0, 0.05, -0.3)
	model_root.add_child(muzzle_flash)
	
	# Audio
	fire_sound = AudioStreamPlayer3D.new()
	fire_sound.bus = "SFX"
	fire_sound.stream = AudioManager.stream_for("nailgun_fire", "res://assets/sounds/nailgun_fire.wav")
	fire_sound.position = muzzle_flash.position
	fire_sound.volume_db = -5.0
	model_root.add_child(fire_sound)
	
	reload_sound = AudioStreamPlayer3D.new()
	reload_sound.bus = "SFX"
	reload_sound.stream = AudioManager.stream_for("shotgun_reload", "res://assets/sounds/shotgun_reload.wav")
	model_root.add_child(reload_sound)

func _spawn_custom_projectile(origin: Vector3, fire_dir: Vector3) -> void:
	var proj = load("res://weapons/projectile.gd").new()
	
	# Give it a nail/spike mesh
	var mesh_instance = MeshInstance3D.new()
	var p_mesh = CylinderMesh.new()
	p_mesh.top_radius = 0.0
	p_mesh.bottom_radius = 0.01
	p_mesh.height = 0.1
	var mat = StandardMaterial3D.new()
	mat.albedo_color = Color(0.7, 0.7, 0.7) # Shiny metal
	mat.metallic = 1.0
	mat.roughness = 0.3
	p_mesh.material = mat
	mesh_instance.mesh = p_mesh
	# Rotate it so it points forward
	mesh_instance.rotation.x = deg_to_rad(-90)
	proj.add_child(mesh_instance)
	
	# Tracer streak
	var tracer = MeshInstance3D.new()
	var t_mesh = CylinderMesh.new()
	t_mesh.top_radius = 0.02
	t_mesh.bottom_radius = 0.0
	t_mesh.height = 1.5
	var t_mat = StandardMaterial3D.new()
	t_mat.albedo_color = Color(1.0, 0.8, 0.1) # Bright yellow/orange
	t_mat.emission_enabled = true
	t_mat.emission = Color(1.0, 0.8, 0.1)
	t_mat.emission_energy_multiplier = 3.0
	t_mat.transparency = BaseMaterial3D.TRANSPARENCY_ALPHA
	t_mat.albedo_color.a = 0.6
	t_mesh.material = t_mat
	tracer.mesh = t_mesh
	tracer.rotation.x = deg_to_rad(-90)
	tracer.position.z = 0.75 # Trail behind the nail
	proj.add_child(tracer)
	
	var spawn_pos = origin
	var actual_fire_dir = fire_dir
	
	if muzzle_flash and camera:
		spawn_pos = muzzle_flash.global_position
		# Map the position through the viewmodel camera to fix FOV mismatch
		var wman = get_parent()
		if wman and "vm_camera" in wman and is_instance_valid(wman.vm_camera):
			if wman.vm_camera.is_position_behind(muzzle_flash.global_position) == false:
				var screen_pos = wman.vm_camera.unproject_position(muzzle_flash.global_position)
				var dist = camera.global_position.distance_to(muzzle_flash.global_position)
				spawn_pos = camera.project_position(screen_pos, dist)
			
		var target_pos = origin + fire_dir * max_range
		var space_state = camera.get_world_3d().direct_space_state
		var query = PhysicsRayQueryParameters3D.create(origin, target_pos)
		if player:
			query.exclude = [player.get_rid()]
		var result = space_state.intersect_ray(query)
		if result:
			target_pos = result.position
			
		actual_fire_dir = (target_pos - spawn_pos).normalized()
	
	# Projectile rotation so it faces velocity
	var up_vec = Vector3.UP
	if abs(actual_fire_dir.dot(up_vec)) > 0.99:
		up_vec = Vector3.RIGHT
	proj.transform.basis = Basis.looking_at(actual_fire_dir, up_vec)
		
	# Push the projectile forward slightly so the 1.5m long tracer tail 
	# doesn't clip backward past the gun and look like it's coming from beside the player's head.
	proj.position = spawn_pos + actual_fire_dir * 1.5
	proj.logical_source = origin
		
	proj.velocity = actual_fire_dir * projectile_speed
	if player:
		proj.velocity += actual_fire_dir * max(0.0, player.velocity.dot(actual_fire_dir))
	proj.damage = base_damage
	proj.min_damage = min_damage
	proj.falloff_start = falloff_start
	proj.max_range = max_range
	proj.drop_gravity = projectile_gravity
	proj.owner_player = player
	
	# Spawn in the world
	get_tree().current_scene.add_child(proj)