class_name FriendPanel
extends RefCounted

# 好友/排行面板：
# - 负责全国排行、好友排行、翻页和好友行渲染。
# - 排行接口返回的数据只在本面板分页状态中保存，不参与全局玩家状态。
# - 行按钮后续扩展访问好友时，应继续通过 callbacks 发回上层路由。
const NumberFormatterScript := preload("res://scripts/core/number_formatter.gd")
const I18nScript := preload("res://scripts/core/i18n.gd")

var _ui
var _texture_provider
var _friend_api
var _context
var _callbacks: Dictionary = {}
var _page_size := 7
var _rank_type := 0
var _show_type := 1
var _page_index := 1
var _page_max := 1
var _panel: Control
var _list: Control
var _page_label: Label
var _title_lv_label: Label


func setup(options: Dictionary) -> void:
	_ui = options.get("ui_builder")
	_texture_provider = options.get("texture_provider")
	_friend_api = options.get("friend_api")
	_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()
	_page_size = int(options.get("page_size", _page_size))


func create(rank_type: int) -> Control:
	_rank_type = rank_type
	_show_type = 1
	_page_index = 1
	_page_max = 1
	_panel = _ui.create_common_panel_shell("FriendPanel", Vector2(594.0, 862.0), "panel_icon_friend", _texture_provider.atlas_path("friend"), "panel_title_friend", _texture_provider.atlas_path("friend"))
	_ui.add_content_panel_background(_panel, "InnerPage", Vector2(88.0, 206.0), Vector2(464.0, 638.0))
	_ui.create_tab_bar(_panel, "FriendTabs", ["全国排名", "好友排名"], Vector2(88.0, 159.0), _rank_type, Callable(self, "_on_tab_pressed"), 50.0)

	_ui.add_panel_label(_panel, "TitleRank", "排名", Vector2(120.0, 233.0), Vector2(60.0, 32.0), 26, Color.html("#ffcc00"), 3, Color.html("#9c460b"))
	_ui.add_panel_label(_panel, "TitleName", "游戏昵称", Vector2(201.0, 233.0), Vector2(108.0, 32.0), 26, Color.html("#ffcc00"), 3, Color.html("#9c460b"))
	_title_lv_label = _ui.add_panel_label(_panel, "TitleLv", "等级", Vector2(335.0, 233.0), Vector2(72.0, 32.0), 26, Color.html("#ffcc00"), 3, Color.html("#9c460b"))
	_ui.add_panel_label(_panel, "TitleHome", "家园", Vector2(413.0, 233.0), Vector2(64.0, 32.0), 26, Color.html("#ffcc00"), 3, Color.html("#9c460b"))

	var scroll := ScrollContainer.new()
	scroll.name = "FriendScroll"
	scroll.position = Vector2(102.0, 278.0)
	scroll.size = Vector2(446.0, 487.0)
	scroll.clip_contents = true
	_ui.configure_vertical_scroll(scroll)
	_panel.add_child(scroll)

	_list = Control.new()
	_list.name = "FriendList"
	_list.custom_minimum_size = Vector2(450.0, float(_page_size) * 70.0)
	_list.size = Vector2(450.0, float(_page_size) * 70.0)
	scroll.add_child(_list)

	_ui.add_texture_button(_panel, "FriendPrev", _texture_provider.common("btn_page_prev"), Vector2(364.0, 791.0), Vector2(46.0, 41.0), "", Callable(self, "_on_prev_pressed"), 20)
	_ui.add_texture_button(_panel, "FriendNext", _texture_provider.common("btn_page_next"), Vector2(481.0, 791.0), Vector2(46.0, 41.0), "", Callable(self, "_on_next_pressed"), 20)
	_page_label = _ui.add_panel_label(_panel, "FriendPage", "1/1", Vector2(409.0, 800.0), Vector2(72.0, 28.0), 24, Color.html("#753f24"), 0, Color.TRANSPARENT)

	_ui.add_texture_button(_panel, "FriendGold", _texture_provider.friend("friend_btn_caifu"), Vector2(94.0, 773.0), Vector2(72.0, 65.0), "", Callable(self, "_on_gold_pressed"), 20)
	_ui.add_texture_button(_panel, "FriendLv", _texture_provider.friend("friend_btn_lv"), Vector2(173.0, 760.0), Vector2(70.0, 80.0), "", Callable(self, "_on_lv_pressed"), 20)
	_ui.add_texture_button(_panel, "FriendPower", _texture_provider.friend("friend_btn_zhanli"), Vector2(253.0, 773.0), Vector2(66.0, 67.0), "", Callable(self, "_on_power_pressed"), 20)
	return _panel


func list() -> Control:
	return _list


func page_label() -> Label:
	return _page_label


func title_lv_label() -> Label:
	return _title_lv_label


func update_page() -> void:
	var list := _list
	if _friend_api == null or not _is_live_node(list):
		return
	_render_empty_rows(list)
	_update_page_label()

	var token := _token()
	if token.is_empty():
		return
	var result: Dictionary = await _friend_api.fetch_list(token, _rank_type, _show_type, _page_index, _page_size)
	if not _is_current_node(list, _list):
		return
	if not result.get("ok", false):
		_show_toast("排行榜加载失败：%s" % result.get("game_status", result.get("status", 0)))
		return
	var body = result.get("body", {})
	var data = body.get("data", {}) if body is Dictionary else {}
	if not data is Dictionary:
		return
	_page_max = maxi(int(ceil(float(int(data.get("total_count", 0))) / float(_page_size))), 1)
	_update_page_label()
	_clear_children(list)
	var rows = data.get("list", [])
	var row_index := 0
	if rows is Array:
		for raw_row in rows:
			if raw_row is Dictionary:
				var row: Dictionary = raw_row.duplicate(true)
				if not row.has("ranking"):
					row["ranking"] = (_page_index - 1) * _page_size + row_index + 1
				_add_row_to_list(list, _create_row(row), row_index)
				row_index += 1
	for index in range(row_index, _page_size):
		_add_row_to_list(list, _create_row({}), index)


func _on_tab_pressed(index: int) -> void:
	_rank_type = index
	_page_index = 1
	var tab_bar := _panel.get_node_or_null("FriendTabs") if _panel != null else null
	_ui.update_tab_bar(tab_bar as Control, _rank_type)
	update_page()


func _on_prev_pressed() -> void:
	if _page_index <= 1:
		return
	_page_index -= 1
	update_page()


func _on_next_pressed() -> void:
	if _page_index >= _page_max:
		return
	_page_index += 1
	update_page()


func _on_gold_pressed() -> void:
	_show_type = 0
	if _title_lv_label != null:
		_title_lv_label.text = I18nScript.t("财富")
	_page_index = 1
	update_page()


func _on_lv_pressed() -> void:
	_show_type = 1
	if _title_lv_label != null:
		_title_lv_label.text = I18nScript.t("等级")
	_page_index = 1
	update_page()


func _on_power_pressed() -> void:
	_show_toast("战力排行暂未开放")


func _render_empty_rows(parent: Control) -> void:
	if not _clear_children_if_live(parent):
		return
	for index in range(_page_size):
		_add_row_to_list(parent, _create_row({}), index)


func _update_page_label() -> void:
	if _is_live_node(_page_label):
		_page_label.text = "%s/%s" % [_page_index, _page_max]


func _add_row_to_list(parent: Control, row: Control, index: int) -> void:
	if not _is_live_node(parent):
		return
	row.position = Vector2(0.0, float(index) * 70.0)
	parent.add_child(row)


func _create_row(row: Dictionary) -> Control:
	var holder := Control.new()
	holder.name = "FriendRow%s" % int(row.get("user_id", 0))
	holder.custom_minimum_size = Vector2(450.0, 70.0)
	holder.size = Vector2(450.0, 70.0)
	_ui.add_texture(holder, "Bg", _texture_provider.rank("friend_item"), Vector2(0.0, 8.0), Vector2(430.0, 56.0))
	if row.is_empty():
		return holder
	var rank := int(row.get("ranking", row.get("rank", 0)))
	if rank >= 1 and rank <= 3:
		_ui.add_texture(holder, "RankIcon", _texture_provider.rank("rank%s" % rank), Vector2(24.0, 15.0), Vector2(31.0, 40.0), TextureRect.STRETCH_KEEP_ASPECT_CENTERED)
	else:
		_ui.add_panel_label(holder, "Rank", str(rank), Vector2(19.0, 27.0), Vector2(39.0, 24.0), 24, Color.html("#753f24"), 0, Color.TRANSPARENT)
	_ui.add_panel_label(holder, "Name", str(row.get("nickname", row.get("name", ""))).left(8), Vector2(46.0, 27.0), Vector2(193.0, 24.0), 20, Color.html("#753f24"), 0, Color.TRANSPARENT)
	var value := int(row.get("level", row.get("lv", 0))) if _show_type == 1 else int(row.get("gold", 0))
	_ui.add_panel_label(holder, "Value", NumberFormatterScript.compact(value), Vector2(200.0, 27.0), Vector2(113.0, 24.0), 20, Color.html("#753f24"), 0, Color.TRANSPARENT)
	_ui.add_texture_button(holder, "Home", _texture_provider.rank("btn_friend_home"), Vector2(308.0, 6.0), Vector2(63.0, 59.0), "", Callable(self, "_on_home_pressed").bind(row.duplicate(true)), 20)
	return holder


func _on_home_pressed(row: Dictionary) -> void:
	await _visit_friend(row)


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


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


func _visit_friend(row: Dictionary) -> void:
	var target_id := _target_user_id(row)
	if target_id <= 0:
		_show_toast("好友数据异常")
		return
	var own_id := int(_call("player_id", [], 0))
	if own_id > 0 and own_id == target_id:
		_show_toast("这是你的农场，不用去啦！")
		return
	await _call_async("visit_friend_home", [row])


func _target_user_id(row: Dictionary) -> int:
	for key in ["uid", "user_id", "id"]:
		var value := int(row.get(key, 0))
		if value > 0:
			return value
	return 0


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()


func _is_live_node(node: Variant) -> bool:
	return node != null and is_instance_valid(node) and node is Node


func _is_current_node(candidate: Variant, current: Variant) -> bool:
	return _is_live_node(candidate) and _is_live_node(current) and candidate == current


func _clear_children_if_live(parent: Variant) -> bool:
	if not _is_live_node(parent):
		return false
	_clear_children(parent as Node)
	return true