"use client"
import { SiteHeader } from "@/components/site-header"
import { useFamily } from "@/context/family-context"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { ScrollArea } from "@/components/ui/scroll-area"
import { Clock, Map as MapIcon, ArrowRight } from "lucide-react"
import dynamic from 'next/dynamic'
import { useMemo, useEffect, useState } from 'react'
import * as echarts from 'echarts'

const ReactECharts = dynamic(() => import('echarts-for-react'), { ssr: false })

// 中国地图 GeoJSON 数据 - 完整的轮廓
const chinaGeoJSON = {
  type: "FeatureCollection",
  features: [
    {
      type: "Feature",
      properties: { name: "中国" },
      geometry: {
        type: "MultiPolygon",
        coordinates: [
          [
            [
              // 中国大陆完整轮廓 - 从东北开始逆时针
              [134.5, 48.5], [135, 47], [134, 45], [133, 43], [131, 42], [130, 43], [129, 44],
              [128, 45], [127, 46], [126, 47], [125, 48], [124, 49], [123.5, 50], [123, 51],
              [122.5, 52], [122, 53], [121, 53.5], [120, 53.3], [119, 53], [118.5, 52],
              [119, 51], [119.5, 50], [120, 49], [121, 48], [122, 47], [123, 46], [124, 45],
              [125, 44], [126, 43], [127, 42.5], [128, 42], [129, 41.5], [130, 41],
              // 东部海岸线
              [130, 40], [129, 39], [128, 38.5], [127, 38], [126, 37.5], [125, 37],
              [124, 36.5], [123, 36], [122.5, 35.5], [122, 35], [121.5, 34.5], [121, 34],
              [120.5, 33.5], [120, 33], [119.5, 32.5], [119.5, 32], [120, 31.5], [120.5, 31],
              [121, 30.5], [121.5, 30], [122, 29.5], [122, 29], [121.5, 28.5], [121, 28],
              [120.5, 27.5], [120, 27], [119.5, 26.5], [119, 26], [118.5, 25.5], [118, 25],
              [117.5, 24.5], [117, 24], [116.5, 23.5], [116, 23], [115.5, 22.5], [115, 22],
              [114, 21.8], [113, 21.5], [112, 21.3], [111, 21.2], [110.5, 21],
              // 南部边界
              [110, 20.5], [109.5, 20], [109, 20.5], [108.5, 21], [108, 21.5], [107.5, 22],
              [107, 22.5], [106.5, 23], [106, 23.5], [105.5, 24], [105, 24.5], [104.5, 25],
              [104, 25.5], [103.5, 26], [103, 26.5], [102.5, 27], [102, 27.5], [101.5, 28],
              [101, 28.5], [100.5, 29], [100, 29.5], [99.5, 30], [99, 30.5], [98.5, 31],
              [98, 31.5], [97.5, 32], [97, 32.5],
              // 西南边界
              [96.5, 33], [96, 33.5], [95.5, 34], [95, 34.5], [94.5, 35], [94, 35.5],
              [93.5, 36], [93, 36.5], [92.5, 37], [92, 37.5], [91.5, 38], [91, 38.5],
              [90.5, 39], [90, 39.5], [89.5, 40], [89, 40.5], [88.5, 41], [88, 41.5],
              [87.5, 42], [87, 42.5], [86.5, 43], [86, 43.5], [85.5, 44], [85, 44.5],
              [84.5, 45], [84, 45.5], [83.5, 46], [83, 46.5], [82.5, 47], [82, 47.5],
              [81.5, 48], [81, 48.5], [80.5, 49], [80, 49.5],
              // 西北边界
              [79.5, 49.5], [79, 49.3], [78.5, 49], [78, 48.5], [77.5, 48], [77, 47.5],
              [76.5, 47], [76, 46.5], [75.5, 46], [75, 45.5], [74.5, 45], [74, 44.5],
              [73.5, 44], [73.5, 43.5], [74, 43], [74.5, 42.5], [75, 42], [75.5, 41.5],
              [76, 41], [76.5, 40.5], [77, 40], [77.5, 39.5], [78, 39], [78.5, 38.5],
              [79, 38.5], [79.5, 39], [80, 39.5], [80.5, 40], [81, 40.5], [81.5, 41],
              [82, 41.5], [82.5, 42], [83, 42.5], [83.5, 43], [84, 43.5], [84.5, 44],
              [85, 44.5], [85.5, 45], [86, 45.5], [86.5, 46], [87, 46.5], [87.5, 47],
              [88, 47.5], [88.5, 48], [89, 48.5], [89.5, 49], [90, 49.5], [90.5, 50],
              [91, 50.5], [91.5, 51], [92, 51.5], [92.5, 52], [93, 52.5], [93.5, 53],
              // 北部边界
              [94, 53], [95, 52.8], [96, 52.5], [97, 52.2], [98, 52], [99, 51.8],
              [100, 51.5], [101, 51.2], [102, 51], [103, 50.8], [104, 50.5], [105, 50.2],
              [106, 50], [107, 49.8], [108, 49.5], [109, 49.3], [110, 49.2], [111, 49.1],
              [112, 49], [113, 48.9], [114, 48.8], [115, 48.7], [116, 48.6], [117, 48.5],
              [118, 48.5], [119, 48.5], [120, 48.6], [121, 48.7], [122, 48.8], [123, 48.9],
              [124, 49], [125, 49.1], [126, 49.2], [127, 49.3], [128, 49.4], [129, 49.5],
              [130, 49.5], [131, 49.4], [132, 49.2], [133, 49], [134, 48.8], [134.5, 48.5]
            ]
          ],
          // 海南岛
          [[[108.6, 18.5], [109.5, 18.3], [110.5, 18.5], [111, 19], [111, 19.5], [110.5, 20], [109.5, 20.2], [108.6, 20], [108.2, 19.5], [108.6, 18.5]]],
          // 台湾岛
          [[[120, 22], [120.5, 21.9], [121, 22], [121.5, 22.5], [122, 23], [122, 23.5], [122, 24], [121.8, 24.5], [121.5, 25], [121, 25.2], [120.5, 25.1], [120.2, 24.8], [120, 24.5], [120, 24], [120, 23.5], [120, 23], [120, 22.5], [120, 22]]]
        ]
      }
    }
  ]
}

// 城市坐标数据
const geoCoordMap: Record<string, [number, number]> = {
  '广州': [113.23, 23.16],
  '深圳': [114.07, 22.62],
  '北京': [116.46, 39.92],
  '上海': [121.48, 31.22],
  '成都': [104.06, 30.67],
  '杭州': [120.19, 30.26],
  '南京': [118.78, 32.04],
  '武汉': [114.31, 30.52],
  '西安': [108.95, 34.27],
  '厦门': [118.10, 24.46]
}

export default function TimelinePage() {
  const { treeData, getMember } = useFamily()
  const members = Object.values(treeData.members)
  const [mapLoaded, setMapLoaded] = useState(false)
  
  // 注册中国地图 - 从外部文件加载完整数据
  useEffect(() => {
    fetch('/china.json')
      .then(response => response.json())
      .then(geoJson => {
        echarts.registerMap('china', geoJson)
        setMapLoaded(true)
      })
      .catch(error => {
        console.error('Failed to load China map:', error)
        // 如果加载失败，使用简化版本
        echarts.registerMap('china', chinaGeoJSON as any)
        setMapLoaded(true)
      })
  }, [])

  // -- Timeline Logic --
  // Flatten events: Births and Deaths
  const events = members
    .flatMap((m) => {
      const evs = []
      if (m.birthDate) {
        evs.push({
          date: m.birthDate,
          year: Number.parseInt(m.birthDate.substring(0, 4)),
          type: "birth",
          member: m,
        })
      }
      if (m.deathDate) {
        evs.push({
          date: m.deathDate,
          year: Number.parseInt(m.deathDate.substring(0, 4)),
          type: "death",
          member: m,
        })
      }
      return evs
    })
    .sort((a, b) => b.date.localeCompare(a.date)) // 倒序排列：最新的在上面

  // -- Migration Logic --
  // Find moves between generations (Father -> Child location change)
  const migrations = members
    .flatMap((m) => {
      if (!m.fatherId) return []
      const father = getMember(m.fatherId)
      if (!father) return []

      // Check if location exists and is different
      const loc1 = father.ancestralHome || father.birthPlace
      const loc2 = m.ancestralHome || m.birthPlace

      if (loc1 && loc2 && loc1 !== loc2) {
        return [
          {
            year: m.birthDate ? Number.parseInt(m.birthDate.substring(0, 4)) : null,
            from: loc1,
            to: loc2,
            person: m,
            father: father,
          },
        ]
      }
      return []
    })
    .sort((a, b) => (a.year || 0) - (b.year || 0))
  
  // ECharts 地图配置
  const mapOption = useMemo(() => {
    // 城市坐标映射（简化城市名）
    const cityMap: Record<string, string> = {
      '广东省广州市': '广州',
      '广东省深圳市': '深圳',
      '北京市': '北京',
      '上海市': '上海',
      '四川省成都市': '成都',
    }
    
    // 转换迁徙数据为 ECharts 格式（使用经纬度坐标）
    const lines = migrations.map(mig => {
      const fromCity = cityMap[mig.from] || mig.from
      const toCity = cityMap[mig.to] || mig.to
      const fromCoord = geoCoordMap[fromCity]
      const toCoord = geoCoordMap[toCity]
      
      if (!fromCoord || !toCoord) return null
      
      return {
        fromName: fromCity,
        toName: toCity,
        coords: [fromCoord, toCoord]
      }
    }).filter(Boolean)
    
    // 统计每个城市的迁入迁出
    const cityData: Record<string, number> = {}
    migrations.forEach(mig => {
      const from = cityMap[mig.from] || mig.from
      const to = cityMap[mig.to] || mig.to
      cityData[from] = (cityData[from] || 0) + 1
      cityData[to] = (cityData[to] || 0) + 1
    })
    
    const scatterData = Object.entries(cityData).map(([name, value]) => {
      const coord = geoCoordMap[name]
      if (!coord) return null
      return {
        name,
        value: [...coord, value * 10]
      }
    }).filter(Boolean)
    
    return {
      backgroundColor: 'transparent',
      geo: {
        map: 'china',
        roam: true,
        label: {
          show: true,
          color: '#666',
          fontSize: 12
        },
        itemStyle: {
          areaColor: 'rgba(128, 128, 128, 0.15)',
          borderColor: 'rgba(128, 128, 128, 0.5)',
          borderWidth: 2
        },
        emphasis: {
          itemStyle: {
            areaColor: 'rgba(128, 128, 128, 0.25)'
          },
          label: {
            show: true,
            color: '#333',
            fontSize: 14
          }
        }
      },
      series: [
        {
          type: 'lines',
          coordinateSystem: 'geo',
          data: lines,
          lineStyle: {
            color: 'transparent',
            width: 0,
            opacity: 0
          },
          effect: {
            show: true,
            period: 3,
            trailLength: 0,
            symbol: 'arrow',
            symbolSize: 10,
            color: 'hsl(var(--primary))'
          },
          zlevel: 1
        },
        {
          type: 'scatter',
          coordinateSystem: 'geo',
          data: scatterData,
          symbolSize: 10,
          label: {
            show: true,
            formatter: '{b}',
            position: 'right',
            fontSize: 12,
            fontWeight: 'normal',
            color: '#333'
          },
          itemStyle: {
            color: '#000',
            shadowBlur: 0,
            borderWidth: 0
          },
          emphasis: {
            scale: true,
            itemStyle: {
              color: '#000'
            },
            label: {
              show: true,
              fontSize: 14,
              fontWeight: 'bold'
            }
          }
        }
      ]
    }
  }, [migrations])

  return (
    <div className="min-h-screen bg-background flex flex-col font-sans">
      <SiteHeader />
      <main className="container mx-auto py-8 px-4 md:px-6 flex-1">
        <div className="mb-8">
          <h1 className="text-3xl font-serif font-bold mb-2">家族历史 (History)</h1>
          <p className="text-muted-foreground">纵览家族发展的时间脉络与迁徙足迹。</p>
        </div>

        <Tabs defaultValue="timeline" className="w-full">
          <TabsList className="mb-6 w-full md:w-auto">
            <TabsTrigger value="timeline" className="flex items-center gap-2">
              <Clock className="h-4 w-4" /> 时间轴 (Chronology)
            </TabsTrigger>
            <TabsTrigger value="migration" className="flex items-center gap-2">
              <MapIcon className="h-4 w-4" /> 迁徙图 (Migration)
            </TabsTrigger>
          </TabsList>

          <TabsContent value="timeline">
            <Card className="border-none shadow-none bg-transparent">
              <CardContent className="p-0">
                <div className="relative border-l-2 border-primary/20 ml-6 md:ml-12 space-y-8 py-4">
                  {events.map((event, idx) => (
                    <div key={idx} className="relative pl-8 md:pl-12 group">
                      {/* Dot */}
                      <div
                        className={`absolute -left-[9px] top-1 h-4 w-4 rounded-full border-2 border-background transition-colors group-hover:scale-110 ${event.type === "birth" ? "bg-primary" : "bg-neutral-400"
                          }`}
                      />

                      {/* Year Label (Mobile vs Desktop) */}
                      <div className="absolute -left-16 md:-left-24 top-0 w-12 md:w-20 text-right text-sm font-mono text-muted-foreground font-bold">
                        {event.year}
                      </div>

                      {/* Content Card */}
                      <div className="bg-card rounded-lg px-4 py-2 transition-all hover:bg-accent/5 border border-border/50">
                        <div className="flex items-center gap-2 flex-wrap text-sm">
                          <span
                            className={`text-xs px-2 py-0.5 rounded-full flex-shrink-0 ${event.type === "birth" ? "bg-primary/10 text-primary" : "bg-neutral-100 text-neutral-500"
                              }`}
                          >
                            {event.type === "birth" ? "诞生" : "逝世"}
                          </span>
                          <span className="font-serif font-bold">{event.member.fullName}</span>
                          <span className={`text-xs px-1.5 py-0.5 rounded ${event.member.gender === "male" ? "bg-blue-100 text-blue-700" : "bg-pink-100 text-pink-700"}`}>
                            {event.member.gender === "male" ? "男" : "女"}
                          </span>
                          <span className="text-xs text-muted-foreground">第{event.member.generation}世</span>
                          
                          {/* 父母信息 */}
                          {event.member.fatherId && (
                            <span className="text-xs px-1.5 py-0.5 rounded bg-orange-50 text-orange-700 border border-orange-200">
                              父:{getMember(event.member.fatherId)?.fullName || "未知"}
                            </span>
                          )}
                          {event.member.motherId && (
                            <span className="text-xs px-1.5 py-0.5 rounded bg-orange-50 text-orange-700 border border-orange-200">
                              母:{getMember(event.member.motherId)?.fullName || "未知"}
                            </span>
                          )}
                          
                          {/* 配偶信息 */}
                          {event.member.spouseIds && event.member.spouseIds.length > 0 && (
                            <span className="text-xs px-1.5 py-0.5 rounded bg-purple-50 text-purple-700 border border-purple-200">
                              配偶:{getMember(event.member.spouseIds[0])?.fullName || "未知"}
                            </span>
                          )}
                          
                          {/* 子女信息 */}
                          {event.member.childrenIds && event.member.childrenIds.length > 0 && (
                            <span className="text-xs px-1.5 py-0.5 rounded bg-green-50 text-green-700 border border-green-200">
                              子女:{event.member.childrenIds.length}人
                            </span>
                          )}
                          
                          {/* 出生地信息 */}
                          {event.type === "birth" && (event.member.birthPlace || event.member.ancestralHome) && (
                            <span className="text-xs text-muted-foreground">
                              📍{event.member.birthPlace || event.member.ancestralHome}
                            </span>
                          )}
                          
                          {/* 享年 */}
                          {event.type === "death" && event.member.birthDate && (
                            <span className="text-xs text-muted-foreground">
                              享年{event.year - Number.parseInt(event.member.birthDate.substring(0, 4))}岁
                            </span>
                          )}
                          
                          {/* 葬地 */}
                          {event.type === "death" && event.member.burialPlace && (
                            <span className="text-xs text-muted-foreground">
                              ⚰️{event.member.burialPlace}
                            </span>
                          )}
                          
                          <span className="text-xs text-muted-foreground font-mono ml-auto">{event.date}</span>
                        </div>
                      </div>
                    </div>
                  ))}

                  {events.length === 0 && (
                    <div className="pl-8 text-muted-foreground italic">暂无时间记录。请完善成员的出生日期信息。</div>
                  )}
                </div>
              </CardContent>
            </Card>
          </TabsContent>

          <TabsContent value="migration">
            <div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
              <Card>
                <CardHeader>
                  <CardTitle className="font-serif">迁徙记录 (Records)</CardTitle>
                </CardHeader>
                <CardContent>
                  <ScrollArea className="h-[600px] pr-4">
                    <div className="space-y-6">
                      {migrations.map((mig, idx) => (
                        <div key={idx} className="flex flex-col gap-2 p-4 rounded-lg bg-muted/30 border border-border">
                          <div className="flex items-center gap-2 text-sm text-muted-foreground mb-1">
                            <span className="font-mono bg-background px-1 rounded">
                              {mig.year ? `${mig.year}年` : "未知年代"}
                            </span>
                            <span>第 {mig.person.generation} 世</span>
                          </div>
                          <div className="flex items-center justify-between gap-4">
                            <div className="flex-1 text-center p-2 bg-background rounded border border-border/50">
                              <div className="text-xs text-muted-foreground mb-1">迁出地</div>
                              <div className="font-bold">{mig.from}</div>
                              <div className="text-xs text-muted-foreground mt-1">{mig.father.fullName}</div>
                            </div>
                            <ArrowRight className="text-muted-foreground" />
                            <div className="flex-1 text-center p-2 bg-background rounded border border-border/50">
                              <div className="text-xs text-muted-foreground mb-1">迁入地</div>
                              <div className="font-bold text-primary">{mig.to}</div>
                              <div className="text-xs text-muted-foreground mt-1">{mig.person.fullName}</div>
                            </div>
                          </div>
                        </div>
                      ))}
                      {migrations.length === 0 && (
                        <p className="text-center text-muted-foreground py-10">
                          暂无迁徙记录。
                          <br />
                          系统会自动分析父子代之间的籍贯/出生地差异来生成迁徙路径。
                        </p>
                      )}
                    </div>
                  </ScrollArea>
                </CardContent>
              </Card>

              <Card className="bg-gradient-to-br from-primary/5 via-background to-secondary/5 border-primary/20">
                <CardHeader>
                  <CardTitle className="font-serif">迁徙路径图 (Migration Flow)</CardTitle>
                </CardHeader>
                <CardContent>
                  <div className="relative h-[600px] overflow-hidden rounded-lg bg-background/50 backdrop-blur border border-border/50">
                    {!mapLoaded ? (
                      <div className="flex items-center justify-center h-full text-muted-foreground">
                        <div className="text-center">
                          <MapIcon className="h-16 w-16 mx-auto mb-4 opacity-20 animate-pulse" />
                          <p>加载地图中...</p>
                        </div>
                      </div>
                    ) : migrations.length === 0 ? (
                      <div className="flex items-center justify-center h-full text-muted-foreground">
                        <div className="text-center">
                          <MapIcon className="h-16 w-16 mx-auto mb-4 opacity-20" />
                          <p>暂无迁徙数据</p>
                          <p className="text-sm mt-2">请先清空数据库重新加载数据</p>
                        </div>
                      </div>
                    ) : (
                      <ReactECharts 
                        key="migration-map"
                        option={mapOption} 
                        style={{ height: '100%', width: '100%' }}
                        opts={{ renderer: 'canvas' }}
                        notMerge={true}
                        lazyUpdate={true}
                      />
                    )}
                  </div>
                </CardContent>
              </Card>
            </div>
          </TabsContent>
        </Tabs>
      </main>
    </div>
  )
}