@tool
extends Node2D

## 从左到右/从右到左
@export var leftToRight: bool = true:
	get:
		return leftToRight
	set(v):
		leftToRight = v
		update()
## 车站列表
@export var stations: Array[String] = [
	"航天新城|HANGTIANXINCHENG","航天东路|HANGTIANDONGLU","神舟大道|SHENZHOUDADAO",
	"东长安街|DONGCHANGANJIE","飞天路|FEITIANLU",
	"航天大道|HANGTIANDADAO","金滹沱|JINHUTUO","曲江池西|QUJIANGCHIXI",
	"大唐芙蓉园|DATANGFURONGYUAN","大雁塔|DAYANTA","西安科技大学|XIANKEJIDAXUE",
	"建筑科技大学·李家村|JIANZHUKEJIDAXUE-LIJIACUN","和平门|HEPINGMEN",
	"大差市|DACHAISHI","五路口|WULUKOU","西安站|XIANZHAN","含元殿|HANYUANDIAN",
	"大明宫|DAMINGGONG","大明宫北|DAMINGGONGBEI","余家寨|YUJIAZHAI",
	"百花村|BAIHUACUN","常青路|CHANGQINGLU",
	"市中医医院|SHIZHONGYIYIYUAN","行政中心|XINGZHENGZHONGXIN","文景路|WENJINGLU",
	"凤城九路|FENGCHENGJIULU","凤城十二路|FENGCHENGSHIERLU","元朔路|YUANSHUOLU",
	"北客站(北广场)|BEIKEZHAN(BEIGUANGCHANG)"]:
	get:
		return stations
	set(v):
		stations = v
		assert(stations.size() > 0, "车站列表不能为空")
		for s in stations:
			assert(s.split("|").size() == 2, "车站名格式：'车站名|车站英文名'")
		update()
## 当前车站索引
@export var currentStationIndex: int = 0:
	get:
		return currentStationIndex
	set(v):
		currentStationIndex = v
		assert(v >= 0 && v < stations.size(), "当前站超出车站索引范围")
		update()
## 背景色
@export var bgColor: Color = Color.DARK_GRAY:
	get:
		return bgColor
	set(v):
		bgColor = v
		update()
## 已经过站点图标颜色
@export var finishedColor: Color = Color.DARK_GRAY:
	get:
		return finishedColor
	set(v):
		finishedColor = v
		update()
## 未经过站点图标颜色
@export var unfinishedColor: Color = Color.DARK_GREEN:
	get:
		return unfinishedColor
	set(v):
		unfinishedColor = v
		update()

@onready var siteInfoScene: PackedScene = preload("res://station_info_panel/style1/site_info.tscn")
@onready var siteCircleStyle: StyleBoxFlat = preload("res://station_info_panel/style1/site_style_circle.tres")
@onready var siteStripStyle: StyleBoxFlat = preload("res://station_info_panel/style1/site_style_strip.tres")
## 站点样式缓存
var siteStyleMap: Dictionary = {}

const BorderWidth = 2
const PassedColor = Color.DARK_GRAY

var isReady = false

# 重绘完成和未完成的线路条
func updateBgStrips():
	var totalWidth = $Bg.size.x - (2 * BorderWidth)
	if leftToRight:
		var currentSite = $Sites.get_child(currentStationIndex)
		$Bg/Finished["theme_override_styles/panel"].bg_color = finishedColor
		$Bg/Finished.position.x = BorderWidth
		$Bg/Finished.size.x = currentSite.position.x - BorderWidth
		$Bg/Unfinished["theme_override_styles/panel"].bg_color = unfinishedColor
		$Bg/Unfinished.position.x = currentSite.position.x
		$Bg/Unfinished.size.x = totalWidth - currentSite.position.x
	else:
		var currentSite = $Sites.get_child(stations.size()-1-currentStationIndex)
		$Bg/Finished["theme_override_styles/panel"].bg_color = finishedColor
		$Bg/Finished.position.x = currentSite.position.x
		$Bg/Finished.size.x = totalWidth - currentSite.position.x
		$Bg/Unfinished["theme_override_styles/panel"].bg_color = unfinishedColor
		$Bg/Unfinished.position.x = BorderWidth
		$Bg/Unfinished.size.x = currentSite.position.x - BorderWidth

## 更新站点颜色样式
func updateSite(site, siteStyleColor: Color, nameColor):
	var key = siteStyleColor.to_html()
	var siteStyle
	if siteStyleMap.has(key):
		siteStyle = siteStyleMap[key]
	else:
		var circleStyle = siteCircleStyle.duplicate()
		var stripStyle = siteStripStyle.duplicate()
		circleStyle.border_color = siteStyleColor
		stripStyle.bg_color = siteStyleColor
		siteStyle = {"circle": circleStyle, "strip": stripStyle}
		siteStyleMap[key] = siteStyle
	site.siteCircleStyle = siteStyle["circle"]
	site.siteStripStyle = siteStyle["strip"]
	site.nameColor = nameColor

## 重绘
func update():
	if not isReady:
		return
	# 更新前先删除之前的
	for c in $Sites.get_children():
		c.free()
	# 更新背景色
	$Bg["theme_override_styles/panel"].bg_color = bgColor
	# 根据方向添加站点信息组件
	var size = stations.size()
	var range: Array
	if leftToRight:
		range = range(size)
	else:
		range = range(size-1, -1, -1)
	assert(currentStationIndex >= 0 && currentStationIndex < size, "当前站超出车站索引范围")
	for i in range:
		var si = stations[i]
		var sns = si.split("|")
		var sis = siteInfoScene.instantiate()
		sis.stationName = sns[0]
		sis.stationEnName = sns[1]
		if i > currentStationIndex:
			updateSite(sis, unfinishedColor, unfinishedColor)
		else:
			#sis.siteCircleStyle = siteFinishedCircleStyle
			#sis.siteStripStyle = siteFinishedStripStyle
			#sis.nameColor = finishedColor
			updateSite(sis, finishedColor, finishedColor)
		$Sites.add_child(sis)
	# 计算边界最小尺寸（最右边文字不超出边界）
	var last = $Sites.get_child(size-1)
	var edgeWidth = last.calculateWidth()
	# 计算间隔
	var totalWidth = $Bg.size.x - (2 * BorderWidth)
	var interval = totalWidth / (size + 1)
	print(edgeWidth, ", ", interval)
	if interval < edgeWidth:
		var remain = totalWidth - edgeWidth
		interval = remain / size
	var i = 1
	for sc in $Sites.get_children():
		sc.position.x += i * interval
		i += 1
	# 更新线路条
	updateBgStrips()

func _ready():
	isReady = true
	update()