# 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 BonusPickOverlay
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

var _label: Label
var _choice_box: HBoxContainer              # 三卡按钮区（pick 态）
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 _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


func _init() -> void:
	var dim := ColorRect.new()
	dim.color = Color(0, 0, 0, 0.6)
	dim.set_anchors_preset(Control.PRESET_FULL_RECT)
	add_child(dim)
	var center := CenterContainer.new()
	center.set_anchors_preset(Control.PRESET_FULL_RECT)
	dim.add_child(center)
	var box := VBoxContainer.new()
	box.add_theme_constant_override("separation", 12)
	center.add_child(box)
	_label = UiKit.label("", 20, true)
	_label.add_theme_color_override("font_color", UiKit.WARM)
	_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	box.add_child(_label)
	_choice_box = HBoxContainer.new()
	_choice_box.add_theme_constant_override("separation", 12)
	_choice_box.alignment = BoxContainer.ALIGNMENT_CENTER
	box.add_child(_choice_box)
	_confirm_btn = UiKit.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(func(): continue_pressed.emit())
	_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()
	for ch in cards:
		var cid := String(ch.get("id", ""))
		var btn := UiKit.button(String(ch.get("text", "")))
		btn.custom_minimum_size = Vector2(170, 88)
		btn.pressed.connect(func(): _select_card(cid))
		_choice_box.add_child(btn)
	_choice_box.visible = true
	_confirm_btn.visible = false
	_replace_box.visible = false
	_continue_btn.visible = false
	visible = true


func _select_card(id: String) -> void:
	_selected = id
	for i in _choice_box.get_child_count():
		var btn := _choice_box.get_child(i) as Button
		var meta: Dictionary = _card_meta[i] if i < _card_meta.size() else {}
		var base_text := String(meta.get("text", ""))
		btn.text = ("✓ " + base_text) if String(meta.get("id", "")) == id else base_text
	_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:
	if index >= 0 and index < _choice_box.get_child_count():
		(_choice_box.get_child(index) as Button).pressed.emit()


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（bonus_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（aux_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(func(): replace_chosen.emit(tag))
		_replace_box.add_child(btn)
	var decline := UiKit.button("放弃新件（不获取）")
	decline.pressed.connect(func(): replace_chosen.emit(-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