# VERTICAL SLICE - NOT FOR PRODUCTION
# Date: 2026-10-01（迭代 10 奖励重构批——level-clear.md v2 三选一选择面承载）
# 提升三选一覆盖层（模态）：非末关通关的选择停点呈现——部分回血反馈 + 三卡点选 + 确认兑付 +
# 同调位替换子交互。高内聚边界：文案拼装归 Narrator（组合根喂入），选择意图经信号外发；
# 视图零核心引用。交互范式 = node_overlay choice_box 按钮族 + 选路两段式（点选→确认）复用，零新原语。
# 状态机：pick（三卡点选→确认）→ [replace（满位 N+1 选 N）] → result（兑付反馈→继续）。
class_name CurioPickOverlay
extends Control

signal pick_confirmed(item_id: String)
signal replace_chosen(discard_index: int)   # -1 = 放弃新件不获取
signal continue_pressed
signal refresh_requested   # 三选一刷新意图（迭代 11 第①批 T5b——P1 甲 X/Y 双源；重抽归组合根）

var _label: Label
var _choice_box: HBoxContainer              # 三卡区（pick 态——M7 bcard 竖卡）
var _replace_box: VBoxContainer             # 替换子面板（replace 态）
var _confirm_btn: Button                    # 确认钮（点选后点亮——两段式第二拍）
var _continue_btn: Button                   # 继续钮（兑付反馈态唯一出口）
var _refresh_btn: Button                    # 刷新钮（迭代 11 第①批 T5b——余量>0 才显示；M7 升顶条图标钮）
var _refresh_badge: Label                   # M7 余量角标（图标钮右上——demo ⑥ 同构）
var _refresh_l: Label                       # 刷新余量读数（X 优先 + Y 冒险池）
var _refresh_allowance := 0                 # 组合根投喂余量（本视图零核心引用）
var _selected := ""                         # 点选暂存（确认前可改选）
var _header := ""                           # 停点头部文案（选择态保持显示）
var _card_meta: Array = []                  # open_pick 缓存 [{id, text}]——高亮还原读面
var _bcards: Array = []                     # M7 bcard 引用列（select 高亮=set_selected）


func _init() -> void:
	# M7（UI 落码批）：与商店同构（demo ⑥ 用户令两屏一致）——通栏顶条（标题+刷新图标钮/角标）+
	# 居中入账信息行 + bcard 三竖卡 + 底部唯一主钮「确认选择」；差异白名单=免费选择/✓章/无价签
	var box: VBoxContainer = UiKit.modal_shell(self, Color(0, 0, 0, 0.6)).box
	var top := HBoxContainer.new()
	top.add_theme_constant_override("separation", 12)
	box.add_child(top)
	top.add_child(UiKit.label("战利品三选一", 22, true, UiKit.WARM))
	var top_sp := Control.new()
	top_sp.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	top.add_child(top_sp)
	_refresh_btn = UiKit.button("", 0.0)   # 图标钮自设 44×44——豁免宽度基准
	_refresh_btn.icon = UiKit.load_tex(UiKit.TEX_ICON_REFRESH)
	_refresh_btn.custom_minimum_size = Vector2(44, 44)
	_refresh_btn.tooltip_text = "刷新候选——装配刷新件 X 优先，Y 为冒险池；不消耗 AP"
	_refresh_btn.pressed.connect(_emit_refresh_requested)
	_refresh_btn.visible = false
	top.add_child(_refresh_btn)
	_refresh_badge = UiKit.label("0", 12, true, UiKit.INK_ON_GOLD)
	_refresh_badge.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_refresh_badge.set_anchors_preset(Control.PRESET_TOP_RIGHT)
	_refresh_badge.offset_left = -22.0
	_refresh_badge.offset_top = -6.0
	_refresh_btn.add_child(_refresh_badge)
	_refresh_l = UiKit.label("", 12, false, UiKit.WARM_SOFT)
	_refresh_l.visible = false
	top.add_child(_refresh_l)
	_label = UiKit.label("", 15, false, UiKit.WARM_SOFT)
	_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	box.add_child(_label)
	_choice_box = HBoxContainer.new()
	_choice_box.add_theme_constant_override("separation", 20)
	_choice_box.alignment = BoxContainer.ALIGNMENT_CENTER
	box.add_child(_choice_box)
	_confirm_btn = UiKit.primary_button("确认选择")
	_confirm_btn.pressed.connect(_on_confirm_pressed)
	_confirm_btn.visible = false
	box.add_child(_confirm_btn)
	_replace_box = VBoxContainer.new()
	_replace_box.add_theme_constant_override("separation", 8)
	_replace_box.alignment = BoxContainer.ALIGNMENT_CENTER
	box.add_child(_replace_box)
	_continue_btn = UiKit.button("继续")
	_continue_btn.pressed.connect(_emit_continue_pressed)
	_continue_btn.visible = false
	box.add_child(_continue_btn)
	visible = false


# 选择态：header = 停点头部（回血+钥石增量行，Narrator 装配）；cards = [{id, text}]
#（组合根组装——视图纯呈现）。确认前可改选；确认经 pick_confirmed 外发。
func open_pick(header: String, cards: Array) -> void:
	_header = header
	_label.text = header
	_selected = ""
	_card_meta = (cards as Array).duplicate(true)
	for c in _choice_box.get_children():
		c.queue_free()
	_bcards.clear()
	for ch in cards:
		var cid := String(ch.get("id", ""))
		var full := String(ch.get("text", ""))
		var lines := full.split("\n")
		var title := lines[0]
		var desc := "\n".join(lines.slice(1)) if lines.size() > 1 else ""
		var idl := cid.to_lower()
		var band := Color8(194, 178, 100)   # 通用增益（默认——§4.2 类型微光族色）
		if idl.contains("heal"):
			band = Color8(102, 164, 87)
		elif idl.contains("magic") or idl.contains("blast"):
			band = Color8(138, 114, 196)
		elif idl.contains("pierce"):
			band = Color8(87, 160, 160)
		var card := UiKit.bcard(title, desc, band, _icon_for_id(idl))
		card.gui_input.connect(func(ev: InputEvent) -> void:
			if ev is InputEventMouseButton and ev.pressed and ev.button_index == MOUSE_BUTTON_LEFT:
				_select_card(cid))
		card.mouse_filter = Control.MOUSE_FILTER_STOP
		_choice_box.add_child(card)
		_bcards.append(card)
	_choice_box.visible = true
	_confirm_btn.visible = false
	_replace_box.visible = false
	_continue_btn.visible = false
	_refresh_btn.visible = false   # 刷新余量随 set_refresh_info 投喂后现形（open 先归零防残留）
	_refresh_l.text = ""
	visible = true


# 三选一刷新余量投喂（组合根读 adventure.attune_refresh_left()——0 = 刷新面隐藏）
func set_refresh_info(allowance: int) -> void:
	_refresh_allowance = maxi(0, int(allowance))
	_refresh_btn.visible = _refresh_allowance > 0
	_refresh_badge.text = str(_refresh_allowance)
	_refresh_l.text = "免费 · 不消耗 AP" if _refresh_allowance > 0 else ""
	_refresh_l.visible = _refresh_allowance > 0


func _emit_refresh_requested() -> void:
	refresh_requested.emit()


func _select_card(id: String) -> void:
	_selected = id
	# 选中态=木描边+✓章（demo ⑥；set_selected 逐卡置真值防改选残留）
	for i in _bcards.size():
		var meta: Dictionary = _card_meta[i] if i < _card_meta.size() else {}
		(_bcards[i] as UiKit.BCard).set_selected(String(meta.get("id", "")) == id)
	_confirm_btn.visible = true


func _on_confirm_pressed() -> void:
	if _selected != "":
		pick_confirmed.emit(_selected)


# 探针/测试复用：以真实按钮路径触发点选、确认与继续（树序遮挡纪律——断言走真实信号路径）
func press_card(index: int) -> void:
	# M7：卡载体 Button→bcard（gui_input 点选）——真实路径=同一 _select_card 处理器，探针语义不变
	if index >= 0 and index < _card_meta.size():
		_select_card(String(_card_meta[index].get("id", "")))


func press_confirm() -> void:
	_confirm_btn.pressed.emit()


func press_continue() -> void:
	_continue_btn.pressed.emit()


func selected_id() -> String:
	return _selected


# 兑付反馈态（curio_resolved 到达——结果行追加在头部之后；唯一出口 = 继续）
func show_result(text: String) -> void:
	_label.text = _header + "\n" + text
	_choice_box.visible = false
	_confirm_btn.visible = false
	_replace_box.visible = false
	_continue_btn.visible = true
	visible = true


# 同调位替换子态（treasure_replace_presented 到达）：items = [{index, item_id, display_name}]（组合根
# 喂显示名）。两路出口：丢旧收新（逐件钮）/ 放弃新件——终态恒 ≤ 同调位由核心受理面保证。
func open_replace(items: Array, incoming_name: String, holding: int, slots: int) -> void:
	_label.text = "同调位已满（%d/%d）——收下「%s」需丢弃一件已有道具，或放弃新件" % [holding, slots, incoming_name]
	for c in _replace_box.get_children():
		c.queue_free()
	for it in items:
		var tag: int = int(it.get("index", it.get("handle", -1)))   # 通关渠道=携带序号 / 节点渠道=库存句柄（核心分发面裁决）
		var btn := UiKit.button("丢弃「%s」换新" % String(it.get("display_name", it.get("item_id", ""))))
		btn.pressed.connect(_emit_replace_chosen.bind(tag))
		_replace_box.add_child(btn)
	var decline := UiKit.button("放弃新件（不获取）")
	decline.pressed.connect(_emit_replace_chosen.bind(-1))
	_replace_box.add_child(decline)
	_choice_box.visible = false
	_confirm_btn.visible = false
	_replace_box.visible = true
	_continue_btn.visible = false
	visible = true


# 收屏（组合根在 continue_pressed 处理毕调——推进下一关同拍）
func close_pick() -> void:
	_choice_box.visible = false
	_replace_box.visible = false
	_continue_btn.visible = false
	_confirm_btn.visible = false
	visible = false


func _emit_continue_pressed() -> void:
	continue_pressed.emit()


func _emit_replace_chosen(tag: int) -> void:
	replace_chosen.emit(tag)


# M7：id → 手绘图标键（子串映射容错 id 词表演进；缺位=BCard 空图标槽不炸）
func _icon_for_id(idl: String) -> String:
	if idl.contains("heal"):
		return UiKit.TEX_ICON_MEDKIT
	if idl.contains("blast") or idl.contains("magic"):
		return UiKit.TEX_ICON_BLAST
	if idl.contains("gp") or idl.contains("coin"):
		return UiKit.TEX_ICON_COINBAG
	if idl.contains("attack"):
		return UiKit.TEX_ICON_SWORD
	if idl.contains("armor"):
		return UiKit.TEX_ICON_SHIELD
	if idl.contains("ap") or idl.contains("action"):
		return UiKit.TEX_ICON_POUCH
	return UiKit.TEX_ICON_COINBAG