class_name ShopPanel
extends RefCounted

# 商店面板：
# - 负责普通道具、神秘商店、背景三类商品展示和购买入口。
# - 商品配置来自 GameConfigCatalog，购买后通过 callbacks 扣货币/刷新仓库/刷新顶部资源。
# - 该面板只持有自己的列表节点，不直接访问 game_scene 的土地或其它弹窗状态。
const NumberFormatterScript := preload("res://scripts/core/number_formatter.gd")

var _ui
var _texture_provider
var _game_config
var _shop_api
var _get_item_icon_texture: Callable
var _context
var _callbacks: Dictionary = {}
var _tab_index := 0
var _panel: Control
var _list: GridContainer


func setup(options: Dictionary) -> void:
	_ui = options.get("ui_builder")
	_texture_provider = options.get("texture_provider")
	_game_config = options.get("game_config")
	_shop_api = options.get("shop_api")
	_get_item_icon_texture = options.get("get_item_icon_texture", Callable())
	_context = options.get("context")
	_callbacks = options.get("callbacks", {})
	if _callbacks.is_empty() and _context != null and _context.has_method("legacy_callbacks"):
		_callbacks = _context.legacy_callbacks()


func create(tab_index: int) -> Control:
	_tab_index = tab_index
	_panel = _ui.create_common_panel_shell("ShopPanel", Vector2(620.0, 754.0), "panel_icon_shop", _texture_provider.atlas_path("common"), "panel_title_shop", _texture_provider.atlas_path("common"))
	_ui.add_content_panel_background(_panel, "InnerPage", Vector2(67.0, 248.0), Vector2(510.0, 538.0))
	_ui.create_tab_bar(_panel, "ShopTabs", ["普通道具", "神秘商店", "背景"], Vector2(89.0, 201.0), _tab_index, Callable(self, "_on_tab_pressed"))

	var scroll := ScrollContainer.new()
	scroll.name = "ShopScroll"
	scroll.position = Vector2(71.0, 251.0)
	scroll.size = Vector2(500.0, 531.0)
	scroll.clip_contents = true
	scroll.follow_focus = true
	_ui.configure_vertical_scroll(scroll)
	_panel.add_child(scroll)

	var holder := MarginContainer.new()
	holder.name = "ShopListHolder"
	holder.custom_minimum_size = Vector2(500.0, 0.0)
	holder.add_theme_constant_override("margin_left", 16)
	holder.add_theme_constant_override("margin_top", 8)
	holder.add_theme_constant_override("margin_right", 4)
	holder.add_theme_constant_override("margin_bottom", 8)
	scroll.add_child(holder)

	_list = GridContainer.new()
	_list.name = "ShopList"
	_list.columns = 2
	_list.custom_minimum_size = Vector2(464.0, 0.0)
	_list.add_theme_constant_override("h_separation", 16)
	_list.add_theme_constant_override("v_separation", 12)
	holder.add_child(_list)
	render()
	return _panel


func list() -> GridContainer:
	return _list


func render() -> void:
	if _list == null:
		return
	_clear_children(_list)
	var shop_type := 1
	if _tab_index == 1:
		shop_type = 2
	elif _tab_index == 2:
		shop_type = 3
	var items: Array[Dictionary] = _game_config.get_shop_config_by_type(shop_type)
	for item in items:
		_list.add_child(_create_item_card(item))


func _on_tab_pressed(index: int) -> void:
	_tab_index = index
	var tab_bar := _panel.get_node_or_null("ShopTabs") if _panel != null else null
	_ui.update_tab_bar(tab_bar as Control, _tab_index)
	render()


func _create_item_card(shop_item: Dictionary) -> Control:
	var holder := Control.new()
	holder.name = "ShopItem%s" % int(shop_item.get("id", 0))
	holder.custom_minimum_size = Vector2(224.0, 163.0)
	holder.size = Vector2(224.0, 163.0)

	_ui.add_nine_patch(holder, "Bg", _texture_provider.common("tipbg"), Vector2.ZERO, holder.size, Vector4(45.0, 21.0, 57.0, 69.0))
	_ui.add_nine_patch(holder, "PriceBg", _texture_provider.common("blue_rect"), Vector2(116.0, 7.0), Vector2(89.0, 21.0), Vector4(22.0, 10.0, 13.0, 1.0))
	_ui.add_panel_label(holder, "PriceTitle", "单价", Vector2(146.0, 10.0), Vector2(48.0, 18.0), 16, Color.WHITE, 0, Color.TRANSPARENT)

	var item_config: Dictionary = shop_item.get("item", {})
	_ui.add_panel_label(holder, "Name", str(item_config.get("name", "物品")), Vector2(13.0, 121.0), Vector2(193.0, 28.0), 24, Color.html("#753f24"), 0, Color.TRANSPARENT)

	var group_icon := Control.new()
	group_icon.name = "IconGroup"
	group_icon.position = Vector2(14.0, 22.0)
	group_icon.size = Vector2(86.0, 91.0)
	holder.add_child(group_icon)
	_ui.add_texture(group_icon, "ItemBg", _texture_provider.common("item_bg"), Vector2.ZERO, Vector2(90.0, 90.0))
	_ui.add_texture(group_icon, "Icon", _item_icon_texture(int(item_config.get("icon", shop_item.get("item_id", 0)))), Vector2(8.0, 8.0), Vector2(74.0, 70.0), TextureRect.STRETCH_KEEP_ASPECT_CENTERED)
	_ui.add_nine_patch(group_icon, "LvBg", _texture_provider.common("blue_rect"), Vector2(-1.0, -1.0), Vector2(52.0, 21.0), Vector4(0.0, 2.0, 5.0, 17.0))
	var level_required := int(shop_item.get("playerLevel", shop_item.get("player_level", 1)))
	_ui.add_panel_label(group_icon, "Lv", "Lv.%s" % level_required, Vector2(6.0, 1.0), Vector2(50.0, 20.0), 16, Color.WHITE, 0, Color.TRANSPARENT, HORIZONTAL_ALIGNMENT_LEFT)

	var is_locked := int(_player_data().get("level", 1)) < level_required
	var lock: TextureRect = _ui.add_texture(group_icon, "Lock", _texture_provider.common("img_lock"), Vector2(53.0, 49.0), Vector2(35.0, 40.0))
	lock.visible = is_locked

	var price_icon_key := "sicon_gold" if int(shop_item.get("gold", 0)) > 0 else "sicon_diamond"
	_ui.add_texture(holder, "PriceIcon", _texture_provider.common(price_icon_key), Vector2(125.0, 42.0), Vector2(35.0, 35.0), TextureRect.STRETCH_KEEP_ASPECT_CENTERED)
	var price := int(shop_item.get("gold", 0)) if int(shop_item.get("gold", 0)) > 0 else int(shop_item.get("diamond", shop_item.get("gem", 0)))
	_ui.add_panel_label(holder, "Price", NumberFormatterScript.compact(price), Vector2(150.0, 43.0), Vector2(68.0, 28.0), 22, Color.html("#fffef7"), 2, Color.html("#685036"), HORIZONTAL_ALIGNMENT_LEFT)
	var buy_button: Control = _ui.add_texture_button(holder, "Buy", _texture_provider.common("c_btn2"), Vector2(123.0, 70.0), Vector2(88.0, 44.0), "购买", Callable(self, "_buy_item").bind(shop_item.duplicate(true)), 22)
	if is_locked:
		buy_button.modulate = Color(0.72, 0.72, 0.72, 1.0)
		var hit := buy_button.get_node_or_null("Hit") as Button
		if hit != null:
			hit.disabled = true
	return holder


func _buy_item(shop_item: Dictionary) -> void:
	if _is_busy():
		return
	var token := _token()
	if token.is_empty():
		_show_toast("登录信息失效")
		return
	var player_data := _player_data()
	var level_required := int(shop_item.get("playerLevel", shop_item.get("player_level", 1)))
	if int(player_data.get("level", 1)) < level_required:
		_show_toast("购买失败：等级不足")
		return
	var gold_cost := int(shop_item.get("gold", 0))
	var gem_cost := int(shop_item.get("diamond", shop_item.get("gem", 0)))
	if gold_cost > int(player_data.get("gold", 0)):
		_show_toast("购买失败：金豆不足")
		return
	if gem_cost > int(player_data.get("gem", 0)):
		_show_toast("购买失败：资源不足，请充值！")
		return

	_set_busy(true)
	var count := 100 if int(shop_item.get("id", 0)) == 99 else 1
	var result: Dictionary = await _shop_api.buy(token, int(shop_item.get("id", 0)), count)
	_set_busy(false)
	if not result.get("ok", false):
		_show_toast("购买失败：%s" % result.get("game_status", result.get("status", 0)))
		return
	_call("decrease_player_currency", [gold_cost, gem_cost])
	_call("render_player")
	_show_toast("购买成功")
	await _call_async("refresh_store_house")
	render()


func _item_icon_texture(icon_id: int) -> Texture2D:
	if _texture_provider != null and _texture_provider.has_method("item_icon"):
		return _texture_provider.item_icon(icon_id)
	if _get_item_icon_texture.is_valid():
		return _get_item_icon_texture.call(icon_id) as Texture2D
	return _texture_provider.common("item_bg")


func _player_data() -> Dictionary:
	var result = _call("player_data", [], {})
	return result if result is Dictionary else {}


func _token() -> String:
	return str(_call("token", [], ""))


func _is_busy() -> bool:
	return bool(_call("is_operation_in_progress", [], false))


func _set_busy(value: bool) -> void:
	_call("set_operation_in_progress", [value])


func _show_toast(message: String) -> void:
	_call("show_toast", [message])


func _call(name: String, args: Array = [], fallback: Variant = null) -> Variant:
	if _context != null and _context.has_method("call_action"):
		return _context.call_action(name, args, fallback)
	var callable: Callable = _callbacks.get(name, Callable())
	if not callable.is_valid():
		return fallback
	return callable.callv(args)


func _call_async(name: String, args: Array = []) -> Variant:
	if _context != null and _context.has_method("call_action_async"):
		return await _context.call_action_async(name, args)
	var callable: Callable = _callbacks.get(name, Callable())
	if not callable.is_valid():
		return null
	return await callable.callv(args)


func _clear_children(parent: Node) -> void:
	for child in parent.get_children():
		parent.remove_child(child)
		child.queue_free()