extends Node

## Autoload: manages all available player skins.
##
## Skins come from two places:
##   1. Built-in signature characters (registered below). These are the
##      authored Sakura/Akiba defaults and may layer equipment over a GLB rig.
##   2. assets/characters/skins/skins.json — written automatically by
##      tools/pipeline.py for every imported character. No code changes needed
##      to add a new model: run the pipeline, restart the game, it's there.
##
## The selected skin persists to user://skin_selection.cfg and is synced to
## other players via PlayerMovementController.synced_skin_id.

signal skin_changed(skin_id: String)

const SKINS_JSON := "res://assets/characters/skins/skins.json"
const LOCAL_SKINS_JSON := "res://assets/characters/skins/skins.local.json"
const SELECTION_CFG := "user://skin_selection.cfg"

var skins: Dictionary = {}
var active_skin_id: String = "default"


func _ready() -> void:
	_register_builtin_skins()
	_load_skins_json()
	_load_skin_registry(LOCAL_SKINS_JSON, false)
	_load_selection()
	# Fold the old global character choice into legacy loadouts, then derive the
	# live skin from the active loadout from this point onward.
	var loadout_manager := get_node_or_null("/root/LoadoutManager")
	if loadout_manager:
		loadout_manager.migrate_legacy_skin(active_skin_id)
		var loadout_skin: String = loadout_manager.get_active_skin_id()
		if skins.has(loadout_skin) and skins[loadout_skin].is_unlocked:
			active_skin_id = loadout_skin
	print("SkinManager: %d skins available" % skins.size())


func _register_builtin_skins() -> void:
	_add_mecha_skin("default", "Sakura Vanguard",
		"HD anime shrine-runner in a petal-armored vector-thrust frame",
		"res://assets/characters/skins/sakura_pilot_hd.glb", "sakura",
		Color("efe7e8"), Color("e86f98"), Color("343a61"), Color("ffabc8"))
	_add_mecha_skin("akiba_pulse", "Akiba Pulse",
		"HD anime district pilot in a graphite neon cyber-mecha frame",
		"res://assets/characters/skins/akiba_pilot_hd.glb", "akiba",
		Color("272c3e"), Color("20c9d8"), Color("171a28"), Color("ff4eb8"))


func _add_mecha_skin(id: String, display_name: String, description: String,
		model: String, theme: String, sleeve: Color, accent: Color,
		glove: Color, nail: Color) -> void:
	var skin := PlayerSkin.new()
	skin.skin_name = display_name
	skin.description = description
	skin.model_path = model
	skin.set("mecha_theme", theme)
	skin.viewmodel_sleeve_color = sleeve
	skin.viewmodel_accent_color = accent
	skin.viewmodel_glove_color = glove
	skin.viewmodel_nail_color = nail
	skin.viewmodel_hand_style = "fingerless"
	skin.viewmodel_sleeve_ratio = 0.72
	skin.is_unlocked = true
	skins[id] = skin


func _add_color_skin(id: String, display_name: String, description: String, tint: Color) -> void:
	var skin := PlayerSkin.new()
	skin.skin_name = display_name
	skin.description = description
	skin.color_tint = tint
	skin.viewmodel_sleeve_color = tint.darkened(0.18)
	skin.viewmodel_accent_color = tint.lightened(0.22)
	skin.viewmodel_glove_color = tint.darkened(0.48)
	skin.viewmodel_nail_color = tint.lightened(0.34)
	skin.viewmodel_hand_style = "fingerless"
	skin.is_unlocked = true
	skins[id] = skin


func _load_skins_json() -> void:
	_load_skin_registry(SKINS_JSON, true)


func _load_skin_registry(path: String, warn_if_malformed: bool) -> void:
	if not FileAccess.file_exists(path):
		return
	var file := FileAccess.open(path, FileAccess.READ)
	if not file:
		return
	var data = JSON.parse_string(file.get_as_text())
	file.close()
	if not data is Dictionary or not data.has("skins"):
		if warn_if_malformed:
			push_warning("SkinManager: %s is malformed" % path)
		return
	for entry in data["skins"]:
		if not entry is Dictionary or not entry.has("id"):
			continue
		var skin := PlayerSkin.new()
		skin.skin_name = entry.get("name", entry["id"])
		skin.description = entry.get("description", "")
		skin.model_path = entry.get("model", "")
		skin.set("mecha_theme", entry.get("mecha_theme", ""))
		skin.is_unlocked = entry.get("unlocked", true)
		var viewmodel = entry.get("viewmodel", {})
		if viewmodel is Dictionary:
			skin.viewmodel_sleeve_color = _json_color(
				viewmodel.get("sleeve", ""), skin.viewmodel_sleeve_color)
			skin.viewmodel_accent_color = _json_color(
				viewmodel.get("accent", ""), skin.viewmodel_accent_color)
			skin.viewmodel_skin_color = _json_color(
				viewmodel.get("skin", ""), skin.viewmodel_skin_color)
			skin.viewmodel_glove_color = _json_color(
				viewmodel.get("glove", ""), skin.viewmodel_glove_color)
			skin.viewmodel_nail_color = _json_color(
				viewmodel.get("nail", ""), skin.viewmodel_nail_color)
			var hand_style: String = str(viewmodel.get(
				"hand_style", skin.viewmodel_hand_style))
			if hand_style in ["bare", "fingerless", "glove", "android"]:
				skin.viewmodel_hand_style = hand_style
			skin.viewmodel_sleeve_ratio = clampf(
				float(viewmodel.get("sleeve_ratio", skin.viewmodel_sleeve_ratio)),
				0.2, 0.9)
		skins[entry["id"]] = skin


func _json_color(value: Variant, fallback: Color) -> Color:
	if value is String and not value.is_empty():
		return Color.from_string(value, fallback)
	return fallback


# ── Selection ─────────────────────────────────────────────────────────────────

func get_skin(skin_id: String) -> PlayerSkin:
	return skins.get(skin_id, skins["default"])


func get_active_skin() -> PlayerSkin:
	return get_skin(active_skin_id)


func set_active_skin(skin_id: String) -> void:
	if not skins.has(skin_id) or not skins[skin_id].is_unlocked:
		return
	active_skin_id = skin_id
	_save_selection()
	skin_changed.emit(skin_id)


func get_skin_ids() -> Array:
	return skins.keys()


func _save_selection() -> void:
	var cfg := ConfigFile.new()
	cfg.set_value("skin", "active", active_skin_id)
	cfg.save(SELECTION_CFG)


func _load_selection() -> void:
	var cfg := ConfigFile.new()
	if cfg.load(SELECTION_CFG) == OK:
		var saved: String = cfg.get_value("skin", "active", "default")
		if skins.has(saved):
			active_skin_id = saved