# MallUI (첫 버전) —— 道具商城仓库窗（창고몰 / item-mall storage）。
#
#   var mu := preload("res://ui/mall_ui.gd").new()
#   add_child(mu)
#   mu.setup(m2client, canvas_parent, proto)   # proto 可空
#
# `mall_opened` → 显示；`mall_changed` → 刷新。列出商城道具 + [取出]（放进背包第一个空格）。
extends Node

const ItemTooltip = preload("res://ui/item_tooltip.gd")

var client: Node
var proto: Node
var _tooltip_builder: RefCounted
var _root: Control
var _list: VBoxContainer
var _title: Label
var _status: Label
var _password_dialog: ConfirmationDialog
var item_mouse: Node
const MALL_WINDOW := 4
const MALL_PAGE_SLOTS := 45
var _grid: GridContainer
var _cells: Dictionary = {}
var _page_label: Label
var _page := 0
var _mobile_mode := false

func setup(m2client: Node, parent: Node, proto_node: Node = null) -> void:
	client = m2client
	proto = proto_node
	_tooltip_builder = ItemTooltip.new()
	_tooltip_builder.setup(AssetRoot.path(), "en", proto)
	_build(parent)
	if client.has_signal("mall_opened"):
		client.mall_opened.connect(func(_s): refresh())
	if client.has_signal("mall_changed"):
		client.mall_changed.connect(refresh)
	if client.has_signal("mall_password_required"):
		client.mall_password_required.connect(_ask_password)

func is_open() -> bool:
	return _root != null and _root.visible

func set_mobile_mode(enabled: bool) -> void:
	_mobile_mode = enabled

func get_mobile_window() -> Control:
	return _root

func close() -> void:
	if item_mouse and item_mouse.has_method("unregister_owner"):
		item_mouse.unregister_owner(self)
		if item_mouse.has_method("is_attached") and item_mouse.is_attached():
			item_mouse.cancel()
	if _root:
		_root.visible = false
	_page = 0
	if is_instance_valid(_password_dialog):
		_password_dialog.queue_free()
		_password_dialog = null

func _name_of(vnum: int) -> String:
	if proto and proto.has_method("item"):
		var d: Dictionary = proto.item(vnum)
		var n := String(d.get("locale_name", d.get("name", "")))
		if n != "":
			return n
	return "#%d" % vnum

func _tooltip_for(item: Dictionary) -> String:
	var vnum := int(item.get("vnum", 0))
	if _tooltip_builder:
		var pd: Dictionary = proto.item(vnum) if proto and proto.has_method("item") else {}
		return _tooltip_builder.format(vnum, int(item.get("count", 1)), pd, item) + "\n拖到背包取出"
	return "%s\n#%d ×%d\n拖到背包取出" % [_name_of(vnum), vnum, int(item.get("count", 1))]

func _first_free_inv() -> int:
	var used := {}
	for it in client.get_inventory():
		used[int(it.get("cell", -1))] = true
	for i in range(90):
		if not used.has(i):
			return i
	return -1

func refresh() -> void:
	if client == null or _root == null:
		return
	_root.visible = client.is_mall_open()
	if not _root.visible:
		return
	_status.text = ""
	var pages := maxi(1, int(ceil(float(client.get_mall_size()) / float(MALL_PAGE_SLOTS))))
	_page = clampi(_page, 0, pages - 1)
	_title.text = "道具商城仓库（第 %d/%d 页）" % [_page + 1, pages]
	_page_label.text = "%d / %d" % [_page + 1, pages]
	for c in _list.get_children():
		c.queue_free()
	_render_grid()
	var items: Array = client.get_mall_items()
	if items.is_empty():
		var e := Label.new()
		e.text = "（空）"
		_list.add_child(e)
		return
	for it in items:
		_list.add_child(_row(it))

func _render_grid() -> void:
	if _grid == null:
		return
	for pos in _cells:
		var cell: Button = _cells[pos]
		cell.text = ""
		cell.tooltip_text = ""
		cell.set_meta("vnum", 0)
		cell.set_meta("count", 0)
	var items: Array = client.get_mall_items() if client and client.has_method("get_mall_items") else []
	for it in items:
		var absolute_pos := int(it.get("cell", -1))
		var pos := absolute_pos - _page * MALL_PAGE_SLOTS
		if not _cells.has(pos):
			continue
		var vnum := int(it.get("vnum", 0))
		var count := int(it.get("count", 1))
		var cell: Button = _cells[pos]
		cell.text = "%s%s" % [_name_of(vnum).substr(0, 7), (" ×%d" % count) if count > 1 else ""]
		cell.tooltip_text = _tooltip_for(it)
		cell.set_meta("vnum", vnum)
		cell.set_meta("count", count)

func _on_grid_input(local_pos: int, event: InputEvent) -> void:
	if not item_mouse or not item_mouse.has_method("attach_item"):
		return
	if not (event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT
			and event.pressed):
		return
	var cell: Button = _cells[local_pos]
	var vnum := int(cell.get_meta("vnum", 0))
	if vnum == 0:
		return
	item_mouse.attach_item(MALL_WINDOW, _page * MALL_PAGE_SLOTS + local_pos, vnum,
			int(cell.get_meta("count", 1)), null, "mall")

func _on_mobile_grid_tap(local_pos: int) -> void:
	if not _mobile_mode or client == null or not _cells.has(local_pos):
		return
	var cell: Button = _cells[local_pos]
	var vnum := int(cell.get_meta("vnum", 0))
	if vnum == 0 or not client.has_method("mall_checkout"):
		return
	var target := _first_free_inv()
	if target < 0:
		_status.text = "背包已满"
		return
	if not client.mall_checkout(_page * MALL_PAGE_SLOTS + local_pos, 1, target):
		_status.text = "取出请求发送失败"

func _change_page(delta: int) -> void:
	var pages := maxi(1, int(ceil(float(client.get_mall_size()) / float(MALL_PAGE_SLOTS))))
	_page = clampi(_page + delta, 0, pages - 1)
	refresh()

func _ask_password() -> void:
	if is_instance_valid(_password_dialog):
		_password_dialog.queue_free()
	_password_dialog = ConfirmationDialog.new()
	_password_dialog.title = "商城密码"
	_password_dialog.dialog_text = "请输入 1～6 位密码"
	_password_dialog.ok_button_text = "确认"
	_password_dialog.cancel_button_text = "取消"
	var edit := LineEdit.new()
	edit.secret = true
	edit.max_length = 6
	edit.placeholder_text = "密码"
	edit.virtual_keyboard_type = LineEdit.KEYBOARD_TYPE_NUMBER
	edit.custom_minimum_size = Vector2(360, 44) if _mobile_mode else Vector2(220, 28)
	_password_dialog.add_child(edit)
	_password_dialog.confirmed.connect(func() -> void:
		if not client.mall_password(edit.text) and is_instance_valid(_status):
			_status.text = "密码格式无效"
		_password_dialog.queue_free()
		_password_dialog = null)
	_password_dialog.canceled.connect(func() -> void:
		_password_dialog.queue_free()
		_password_dialog = null)
	if _mobile_mode:
		_password_dialog.set_meta("mobile_modal", true)
		_password_dialog.set_meta("mobile_title", "商城密码")
		_password_dialog.min_size = Vector2i(460, 230)
		_password_dialog.size = Vector2i(460, 230)
	_root.add_child(_password_dialog)
	if _mobile_mode:
		_password_dialog.popup_centered(Vector2i(460, 230))
	else:
		_password_dialog.popup_centered()

func _row(it: Dictionary) -> Control:
	var row := HBoxContainer.new()
	row.custom_minimum_size = Vector2(300, 0)
	var vnum := int(it.get("vnum", 0))
	var count := int(it.get("count", 1))
	var cell := int(it.get("cell", 0))
	var nm := Label.new()
	nm.text = "%s ×%d" % [_name_of(vnum), count]
	nm.custom_minimum_size = Vector2(220, 0)
	nm.add_theme_font_size_override("font_size", 12)
	row.add_child(nm)
	if item_mouse:
		nm.mouse_filter = Control.MOUSE_FILTER_STOP
		nm.gui_input.connect(func(e: InputEvent):
			if e is InputEventMouseButton and e.button_index == MOUSE_BUTTON_LEFT and e.pressed \
					and item_mouse.has_method("attach_item"):
				item_mouse.attach_item(MALL_WINDOW, cell, vnum, count, null, "mall"))
	var out := Button.new()
	out.text = "取出"
	out.pressed.connect(func() -> void:
		var target := _first_free_inv()
		if target < 0:
			_status.text = "背包已满"
			return
		if not client.mall_checkout(cell, 1, target):
			_status.text = "取出请求发送失败")
	row.add_child(out)
	return row

func _build(parent: Node) -> void:
	_root = Panel.new()
	_root.set_anchors_preset(Control.PRESET_CENTER)
	_root.position = Vector2(140, -180)
	_root.custom_minimum_size = Vector2(340, 360)
	_root.size = Vector2(340, 360)
	_root.visible = false
	parent.add_child(_root)
	var box := VBoxContainer.new()
	box.position = Vector2(16, 14)
	box.custom_minimum_size = Vector2(308, 0)
	box.add_theme_constant_override("separation", 6)
	_root.add_child(box)
	_title = Label.new()
	_title.text = "道具商城仓库"
	_title.add_theme_font_size_override("font_size", 16)
	box.add_child(_title)
	var pager := HBoxContainer.new()
	pager.position = Vector2(230, 0)
	pager.size = Vector2(90, 24)
	var prev := Button.new()
	prev.text = "‹"
	prev.custom_minimum_size = Vector2(28, 24)
	prev.pressed.connect(func(): _change_page(-1))
	pager.add_child(prev)
	_page_label = Label.new()
	_page_label.custom_minimum_size = Vector2(40, 24)
	_page_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	pager.add_child(_page_label)
	var next := Button.new()
	next.text = "›"
	next.custom_minimum_size = Vector2(28, 24)
	next.pressed.connect(func(): _change_page(1))
	pager.add_child(next)
	_root.add_child(pager)
	_status = Label.new()
	_status.add_theme_font_size_override("font_size", 11)
	_status.add_theme_color_override("font_color", Color(1, 0.65, 0.55))
	box.add_child(_status)
	var sc := ScrollContainer.new()
	sc.custom_minimum_size = Vector2(308, 280)
	box.add_child(sc)
	_list = VBoxContainer.new()
	_list.add_theme_constant_override("separation", 4)
	sc.add_child(_list)
	_list.visible = false
	_grid = GridContainer.new()
	_grid.columns = 5
	_grid.position = Vector2(16, 58)
	_grid.add_theme_constant_override("h_separation", 4)
	_grid.add_theme_constant_override("v_separation", 4)
	_root.add_child(_grid)
	for pos in MALL_PAGE_SLOTS:
		var cell := Button.new()
		cell.custom_minimum_size = Vector2(58, 30)
		cell.add_theme_font_size_override("font_size", 9)
		cell.gui_input.connect(func(e: InputEvent): _on_grid_input(pos, e))
		cell.pressed.connect(func(): _on_mobile_grid_tap(pos))
		_grid.add_child(cell)
		_cells[pos] = cell
	var close := Button.new()
	close.text = "关闭"
	close.pressed.connect(func() -> void: _root.visible = false)
	box.add_child(close)