# SkillUI (P6) —— 技能窗：主动 / 辅助(被动·支援) / 坐骑 三个分类页 + 等级 + 加点。
#
#   var sk := preload("res://ui/skill_ui.gd").new()
#   add_child(sk)
#   sk.setup(m2client, skill_table, ui_manager)
#   sk.set_job("WARRIOR")
#   sk.toggle()     # K 键
#
# 每行：名字 + Lv X(/M/G/P) + [＋]（被动 / CANNOT_LEVEL_UP 无加点）+ [被动]/[切换] 标签。
# 点名字 -> drag_skill_id（quickbar 落点读）。`skills_changed` 刷新。
extends Node

const TABS := ["主动", "辅助", "坐骑"]
const MASTER_SUFFIX := ["", " M", " G", " P"]   # master_type 0..3

var client: Node
var table: RefCounted     # SkillTable
var ui: CanvasLayer       # UiManager
var job := "WARRIOR"
var drag_skill_id := 0
var _tab := 0

var _win: Control
var _rows := {}           # skill_id -> {lv, up}

func setup(m2client: Node, skill_table: RefCounted, ui_manager: CanvasLayer) -> void:
	client = m2client
	table = skill_table
	ui = ui_manager
	if client.has_signal("skills_changed"):
		client.skills_changed.connect(refresh)

func set_job(j: String) -> void:
	job = j
	if is_open():
		_rebuild()

func is_open() -> bool:
	return _win != null and is_instance_valid(_win)

func toggle() -> void:
	if is_open(): close()
	else: open()

func close() -> void:
	if is_open():
		ui.close(_win)
	_win = null
	_rows.clear()

func _cat_key() -> String:
	match _tab:
		1: return "SUPPORT"
		2: return "HORSE"
		_: return job

func open() -> void:
	if is_open() or table == null:
		return
	_win = Control.new()
	_win.set_anchors_preset(Control.PRESET_CENTER_RIGHT)
	_win.position = Vector2(-300, -240)
	_win.size = Vector2(290, 470)
	_win.set_meta("is_titlebar", true)
	var panel := Panel.new()
	panel.set_anchors_preset(Control.PRESET_FULL_RECT)
	var sb := StyleBoxFlat.new()
	sb.bg_color = Color(0.08, 0.09, 0.12, 0.95)
	sb.set_corner_radius_all(4)
	panel.add_theme_stylebox_override("panel", sb)
	_win.add_child(panel)
	var title := Label.new()
	title.text = "技能"
	title.position = Vector2(12, 8)
	_win.add_child(title)
	# 分类页签
	var tabrow := HBoxContainer.new()
	tabrow.name = "tabs"
	tabrow.position = Vector2(10, 30)
	_win.add_child(tabrow)
	for i in TABS.size():
		var b := Button.new()
		b.text = TABS[i]
		b.toggle_mode = true
		b.button_pressed = (i == _tab)
		var ti: int = i
		b.pressed.connect(func(): _switch_tab(ti))
		tabrow.add_child(b)
	var vb := VBoxContainer.new()
	vb.name = "list"
	vb.position = Vector2(10, 60)
	vb.custom_minimum_size = Vector2(270, 0)
	vb.add_theme_constant_override("separation", 2)
	_win.add_child(vb)
	ui.open(_win)
	_rebuild()

func _switch_tab(i: int) -> void:
	_tab = i
	if is_open():
		var tabrow: HBoxContainer = _win.get_node("tabs")
		for j in tabrow.get_child_count():
			(tabrow.get_child(j) as Button).button_pressed = (j == i)
		_rebuild()

func _rebuild() -> void:
	var vb: VBoxContainer = _win.get_node("list")
	for c in vb.get_children():
		c.queue_free()
	_rows.clear()
	var ids: Array = table.for_category(_cat_key())
	if ids.is_empty():
		var e := Label.new()
		e.text = "（无）"
		vb.add_child(e)
		return
	for id in ids:
		var row := HBoxContainer.new()
		row.custom_minimum_size = Vector2(268, 26)
		var nm := Label.new()
		nm.text = table.name_of(id)
		nm.custom_minimum_size = Vector2(140, 0)
		nm.add_theme_font_size_override("font_size", 12)
		row.add_child(nm)
		var lv := Label.new()
		lv.name = "lv"
		lv.custom_minimum_size = Vector2(58, 0)
		lv.add_theme_font_size_override("font_size", 12)
		row.add_child(lv)
		var tag := Label.new()
		tag.custom_minimum_size = Vector2(40, 0)
		tag.add_theme_font_size_override("font_size", 10)
		if table.is_passive(id):
			tag.text = "被动"
			tag.modulate = Color(0.6, 0.8, 1.0)
		elif table.is_toggle(id):
			tag.text = "切换"
			tag.modulate = Color(0.9, 0.8, 0.5)
		row.add_child(tag)
		var sid: int = id
		if table.can_level_up(id) and not table.is_passive(id):
			var up := Button.new()
			up.text = "＋"
			up.custom_minimum_size = Vector2(28, 22)
			up.pressed.connect(func(): client.skill_up(sid))
			row.add_child(up)
			_rows[id] = {"lv": lv, "up": up}
		else:
			_rows[id] = {"lv": lv, "up": null}
		nm.gui_input.connect(func(e: InputEvent):
			if e is InputEventMouseButton and e.pressed and e.button_index == MOUSE_BUTTON_LEFT:
				drag_skill_id = sid)
		vb.add_child(row)
	refresh()

func refresh() -> void:
	if not is_open():
		return
	var lv := {}
	var ms := {}
	for s in client.get_skills():
		lv[int(s["id"])] = int(s["level"])
		ms[int(s["id"])] = int(s.get("master", 0))
	for id in _rows:
		var lvl: int = lv.get(id, 0)
		var m: int = clampi(ms.get(id, 0), 0, 3)
		_rows[id]["lv"].text = "Lv %d%s" % [lvl, MASTER_SUFFIX[m]]