"use client"

import { useState, useEffect } from "react"
import { useSearchParams } from "next/navigation"
import { Sidebar } from "@/components/sidebar"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
import { Badge } from "@/components/ui/badge"
import { Progress } from "@/components/ui/progress"
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
import {
  BarChart,
  Bar,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
  ResponsiveContainer,
  PieChart,
  Pie,
  Cell,
  RadarChart,
  PolarGrid,
  PolarAngleAxis,
  PolarRadiusAxis,
  Radar,
} from "recharts"
import { Download, Share2, TrendingUp, AlertCircle, CheckCircle, Star } from "lucide-react"
import { useToast } from "@/hooks/use-toast"

// 模擬評分結果數據 - 使用您提到的例子：8, 7, 6, 8, 4，平均 = 6.6
const mockCriteria = [
  {
    name: "內容品質",
    score: 8,
    maxScore: 10,
    weight: 25,
    weightedScore: 20,
    feedback: "內容結構清晰，資訊豐富且準確。建議增加更多實際案例來支撐論點。",
    strengths: ["邏輯清晰", "資料準確", "結構完整"],
    improvements: ["增加案例", "深化分析"],
  },
  {
    name: "視覺設計",
    score: 7,
    maxScore: 10,
    weight: 20,
    weightedScore: 14,
    feedback: "整體設計風格統一，色彩搭配合理。部分頁面文字密度過高，影響閱讀體驗。",
    strengths: ["風格統一", "色彩協調", "版面整潔"],
    improvements: ["減少文字密度", "增加視覺元素"],
  },
  {
    name: "邏輯結構",
    score: 6,
    maxScore: 10,
    weight: 20,
    weightedScore: 12,
    feedback: "邏輯架構清晰，各章節銜接自然，論述層次分明。",
    strengths: ["邏輯清晰", "結構完整", "銜接自然"],
    improvements: ["可增加總結回顧"],
  },
  {
    name: "創新性",
    score: 8,
    maxScore: 10,
    weight: 15,
    weightedScore: 12,
    feedback: "內容具有一定創新性，但可以更大膽地提出獨特觀點和解決方案。",
    strengths: ["思路新穎", "角度獨特"],
    improvements: ["增加創新元素", "提出獨特見解"],
  },
  {
    name: "實用性",
    score: 4,
    maxScore: 10,
    weight: 20,
    weightedScore: 8,
    feedback: "內容實用性有待提升，提供的解決方案需要更具可操作性。",
    strengths: ["實用性強", "可操作性好", "價值明確"],
    improvements: ["增加實施步驟"],
  },
];

// 計算 mock 數據的 overview - 基於平均分作為閾值
const calculateMockOverview = (criteria: any[]) => {
  if (!criteria || criteria.length === 0) {
    return {
      excellentItems: 0,
      improvementItems: 0,
      overallPerformance: 0
    };
  }

  // 計算所有項目的平均分數（不考慮權重）
  const totalScore = criteria.reduce((sum, item) => sum + item.score, 0);
  const averageScore = totalScore / criteria.length;

  // 以平均分作為閾值
  // ≥ 平均分 = 優秀項目，< 平均分 = 待改進項目
  const excellentItems = criteria.filter(item => item.score >= averageScore).length;
  const improvementItems = criteria.filter(item => item.score < averageScore).length;
  
  // 整體表現：基於權重的加權平均分數
  const overallPerformance = Math.round(criteria.reduce((sum, item) => sum + (item.score / item.maxScore) * item.weight, 0));
  
  return {
    excellentItems,
    improvementItems,
    overallPerformance
  };
};

const mockResults = {
  projectTitle: "產品介紹簡報",
  overallScore: 82,
  totalPossible: 100,
  grade: "B+",
  analysisDate: "2024-01-15",
  criteria: mockCriteria,
  overview: calculateMockOverview(mockCriteria),
}

// 圖表數據將在組件內部動態生成

const COLORS = ["#0891b2", "#6366f1", "#f59e0b", "#dc2626", "#10b981"]

export default function ResultsPage() {
  const [activeTab, setActiveTab] = useState("overview")
  const [evaluationData, setEvaluationData] = useState(null)
  const [isLoading, setIsLoading] = useState(true)
  const [error, setError] = useState(null)
  const { toast } = useToast()
  const searchParams = useSearchParams()

  useEffect(() => {
    const loadEvaluationData = async () => {
      try {
        setIsLoading(true)
        setError(null)

        // 檢查是否有 URL 參數中的評審 ID
        const evaluationId = searchParams.get('id')
        
        if (evaluationId) {
          // 從 API 獲取評審數據
          console.log(`📊 從 API 獲取評審數據: ID=${evaluationId}`)
          const response = await fetch(`/api/evaluation/${evaluationId}`)
          const result = await response.json()
          
          if (result.success) {
            setEvaluationData(result.data)
            console.log('✅ 成功載入評審數據:', result.data.projectTitle)
          } else {
            throw new Error(result.error || '獲取評審數據失敗')
          }
        } else {
          // 回退到從 localStorage 獲取評審結果
          console.log('📊 從 localStorage 獲取評審結果')
          const storedData = localStorage.getItem('evaluationResult')
          if (storedData) {
            const data = JSON.parse(storedData)
            setEvaluationData(data)
            console.log('✅ 成功載入 localStorage 數據')
          } else {
            throw new Error('沒有找到評審結果')
          }
        }
      } catch (error) {
        console.error('載入評審結果失敗:', error)
        setError(error.message)
        toast({
          title: "載入失敗",
          description: error.message || "無法載入評審結果，請重新進行評審",
          variant: "destructive",
        })
      } finally {
        setIsLoading(false)
      }
    }

    loadEvaluationData()
  }, [searchParams, toast])

  // 如果正在載入，顯示載入狀態
  if (isLoading) {
    return (
      <div className="min-h-screen bg-background">
        <Sidebar />
        <main className="md:ml-64 p-6">
          <div className="max-w-6xl mx-auto">
            <div className="flex items-center justify-center h-64">
              <div className="text-center">
                <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-primary mx-auto mb-4"></div>
                <p className="text-muted-foreground">載入評審結果中...</p>
              </div>
            </div>
          </div>
        </main>
      </div>
    )
  }

  // 如果沒有數據或發生錯誤，顯示錯誤狀態
  if (!evaluationData || error) {
    return (
      <div className="min-h-screen bg-background">
        <Sidebar />
        <main className="md:ml-64 p-6">
          <div className="max-w-6xl mx-auto">
            <div className="flex items-center justify-center h-64">
              <div className="text-center">
                <p className="text-muted-foreground mb-4">
                  {error ? `載入失敗: ${error}` : '沒有找到評審結果'}
                </p>
                <div className="space-x-2">
                  <Button onClick={() => window.location.href = '/upload'}>
                    重新進行評審
                  </Button>
                  <Button variant="outline" onClick={() => window.location.href = '/history'}>
                    查看歷史記錄
                  </Button>
                </div>
              </div>
            </div>
          </div>
        </main>
      </div>
    )
  }

  // 使用真實數據或回退到模擬數據
  const results = evaluationData.evaluation?.fullData || evaluationData || mockResults

  // 計算統計數據 - 基於 criteria_items 的平均分作為閾值
  const calculateOverview = (criteria: any[]) => {
    if (!criteria || criteria.length === 0) {
      return {
        excellentItems: 0,
        improvementItems: 0,
        overallPerformance: 0
      };
    }

    // 計算所有項目的平均分數（不考慮權重）
    const totalScore = criteria.reduce((sum, item) => sum + item.score, 0);
    const averageScore = totalScore / criteria.length;

    // 以平均分作為閾值
    // ≥ 平均分 = 優秀項目，< 平均分 = 待改進項目
    const excellentItems = criteria.filter(item => item.score >= averageScore).length;
    const improvementItems = criteria.filter(item => item.score < averageScore).length;
    
    // 整體表現：基於權重的加權平均分數
    const overallPerformance = Math.round(criteria.reduce((sum, item) => sum + (item.score / item.maxScore) * item.weight, 0));
    
    return {
      excellentItems,
      improvementItems,
      overallPerformance
    };
  };

  // 確保所有必要的數據結構存在
  const safeResults = {
    ...results,
    overview: results.overview || calculateOverview(results.criteria || []),
    chartData: results.chartData || {
      barChart: [],
      pieChart: [],
      radarChart: []
    },
    improvementSuggestions: results.improvementSuggestions || {
      overallSuggestions: '暫無改進建議',
      maintainStrengths: [],
      keyImprovements: [],
      actionPlan: []
    }
  }

  const downloadReport = () => {
    toast({
      title: "報告下載中",
      description: "評審報告 PDF 正在生成，請稍候...",
    })
  }

  const shareResults = () => {
    toast({
      title: "分享連結已複製",
      description: "評審結果分享連結已複製到剪貼板",
    })
  }

  const getScoreColor = (score: number, maxScore: number) => {
    const percentage = (score / maxScore) * 100
    if (percentage >= 90) return "text-green-600"
    if (percentage >= 80) return "text-blue-600"
    if (percentage >= 70) return "text-yellow-600"
    if (percentage >= 60) return "text-orange-600"
    return "text-red-600"
  }

  const getGradeColor = (grade: string) => {
    if (grade.startsWith("A")) return "bg-green-100 text-green-800"
    if (grade.startsWith("B")) return "bg-blue-100 text-blue-800"
    if (grade.startsWith("C")) return "bg-yellow-100 text-yellow-800"
    return "bg-red-100 text-red-800"
  }

  return (
    <div className="min-h-screen bg-background">
      <Sidebar />

      <main className="md:ml-64 p-6">
        <div className="max-w-6xl mx-auto">
          {/* Header */}
          <div className="mb-8 pt-8 md:pt-0">
            <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-4">
              <div>
                <h1 className="text-3xl font-bold text-foreground mb-2 font-[var(--font-playfair)]">評審結果</h1>
                <p className="text-muted-foreground">
                  {safeResults.projectTitle} - 分析完成於 {safeResults.analysisDate}
                </p>
              </div>
              <div className="flex gap-2">
                <Button onClick={shareResults} variant="outline">
                  <Share2 className="h-4 w-4 mr-2" />
                  分享
                </Button>
                <Button onClick={downloadReport}>
                  <Download className="h-4 w-4 mr-2" />
                  下載報告
                </Button>
              </div>
            </div>
          </div>

          {/* Overall Score */}
          <Card className="mb-8">
            <CardContent className="pt-6">
              <div className="grid md:grid-cols-4 gap-6">
                <div className="text-center">
                  <div className="text-4xl font-bold text-primary mb-2">{safeResults.overallScore}</div>
                  <div className="text-sm text-muted-foreground">總分 / {safeResults.totalPossible}</div>
                </div>
                <div className="text-center">
                  <Badge className={`text-lg px-4 py-2 ${getGradeColor(safeResults.grade)}`}>{safeResults.grade}</Badge>
                  <div className="text-sm text-muted-foreground mt-2">等級評定</div>
                </div>
                <div className="text-center">
                  <div className="flex items-center justify-center mb-2">
                    <TrendingUp className="h-6 w-6 text-green-600" />
                  </div>
                  <div className="text-sm text-muted-foreground">{safeResults.performanceStatus}</div>
                </div>
                <div className="text-center">
                  <div className="flex items-center justify-center mb-2">
                    {Array.from({ length: safeResults.recommendedStars || 0 }, (_, i) => (
                      <Star key={i} className="h-6 w-6 text-yellow-500 fill-current" />
                    ))}
                  </div>
                  <div className="text-sm text-muted-foreground">推薦等級</div>
                </div>
              </div>
            </CardContent>
          </Card>

          {/* Detailed Results */}
          <Tabs value={activeTab} onValueChange={setActiveTab}>
            <TabsList className="grid w-full grid-cols-4">
              <TabsTrigger value="overview">總覽</TabsTrigger>
              <TabsTrigger value="detailed">詳細分析</TabsTrigger>
              <TabsTrigger value="charts">圖表分析</TabsTrigger>
              <TabsTrigger value="suggestions">改進建議</TabsTrigger>
            </TabsList>

            <TabsContent value="overview" className="space-y-6">
              {/* Score Breakdown */}
              <Card>
                <CardHeader>
                  <CardTitle>評分明細</CardTitle>
                  <CardDescription>各項評分標準的得分情況</CardDescription>
                </CardHeader>
                <CardContent>
                  <div className="space-y-4">
                    {safeResults.criteria.map((item, index) => (
                      <div key={index} className="flex items-center justify-between p-4 bg-muted rounded-lg">
                        <div className="flex-1">
                          <div className="flex items-center gap-3 mb-2">
                            <h4 className="font-medium">{item.name}</h4>
                            <Badge variant="outline">{item.weight}% 權重</Badge>
                          </div>
                          <Progress value={(item.score / item.maxScore) * 100} className="h-2" />
                        </div>
                        <div className="text-right ml-4">
                          <div className={`text-2xl font-bold ${getScoreColor(item.score, item.maxScore)}`}>
                            {item.score}
                          </div>
                          <div className="text-sm text-muted-foreground">/ {item.maxScore}</div>
                        </div>
                      </div>
                    ))}
                  </div>
                </CardContent>
              </Card>

              {/* Quick Stats */}
              <div className="grid md:grid-cols-3 gap-6">
                <Card>
                  <CardContent className="pt-6 text-center">
                    <CheckCircle className="h-8 w-8 text-green-600 mx-auto mb-2" />
                    <div className="text-2xl font-bold text-green-600 mb-1">{safeResults.overview.excellentItems}</div>
                    <div className="text-sm text-muted-foreground">優秀項目</div>
                  </CardContent>
                </Card>
                <Card>
                  <CardContent className="pt-6 text-center">
                    <AlertCircle className="h-8 w-8 text-yellow-600 mx-auto mb-2" />
                    <div className="text-2xl font-bold text-yellow-600 mb-1">{safeResults.overview.improvementItems}</div>
                    <div className="text-sm text-muted-foreground">待改進項目</div>
                  </CardContent>
                </Card>
                <Card>
                  <CardContent className="pt-6 text-center">
                    <TrendingUp className="h-8 w-8 text-blue-600 mx-auto mb-2" />
                    <div className="text-2xl font-bold text-blue-600 mb-1">{safeResults.overview.overallPerformance}%</div>
                    <div className="text-sm text-muted-foreground">整體表現</div>
                  </CardContent>
                </Card>
              </div>
            </TabsContent>

            <TabsContent value="detailed" className="space-y-6">
              {safeResults.criteria.map((item, index) => (
                <Card key={index}>
                  <CardHeader>
                    <div className="flex items-center justify-between">
                      <CardTitle className="flex items-center gap-2">
                        {item.name}
                        <Badge variant="outline">{item.weight}% 權重</Badge>
                      </CardTitle>
                      <div className={`text-2xl font-bold ${getScoreColor(item.score, item.maxScore)}`}>
                        {item.score}/{item.maxScore}
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-4">
                    <div>
                      <h4 className="font-medium mb-2">AI 評語</h4>
                      <p className="text-muted-foreground leading-relaxed">{item.feedback}</p>
                    </div>

                    <div className="grid md:grid-cols-2 gap-4">
                      <div>
                        <h4 className="font-medium mb-2 text-green-700">優點</h4>
                        <ul className="space-y-1">
                          {item.strengths.map((strength, i) => (
                            <li key={i} className="flex items-center gap-2 text-sm">
                              <CheckCircle className="h-4 w-4 text-green-600" />
                              {strength}
                            </li>
                          ))}
                        </ul>
                      </div>
                      <div>
                        <h4 className="font-medium mb-2 text-orange-700">改進建議</h4>
                        <ul className="space-y-1">
                          {item.improvements.map((improvement, i) => (
                            <li key={i} className="flex items-center gap-2 text-sm">
                              <AlertCircle className="h-4 w-4 text-orange-600" />
                              {improvement}
                            </li>
                          ))}
                        </ul>
                      </div>
                    </div>
                  </CardContent>
                </Card>
              ))}
            </TabsContent>

            <TabsContent value="charts" className="space-y-6">
              <div className="grid lg:grid-cols-2 gap-6">
                {/* Bar Chart */}
                <Card>
                  <CardHeader>
                    <CardTitle>各項目得分</CardTitle>
                  </CardHeader>
                  <CardContent>
                    <ResponsiveContainer width="100%" height={300}>
                      <BarChart data={safeResults.chartData.barChart}>
                        <CartesianGrid strokeDasharray="3 3" />
                        <XAxis dataKey="name" angle={-45} textAnchor="end" height={80} />
                        <YAxis domain={[0, 10]} />
                        <Tooltip />
                        <Bar dataKey="score" fill="#0891b2" />
                      </BarChart>
                    </ResponsiveContainer>
                  </CardContent>
                </Card>

                {/* Pie Chart */}
                <Card>
                  <CardHeader>
                    <CardTitle>權重分布</CardTitle>
                  </CardHeader>
                  <CardContent>
                    <ResponsiveContainer width="100%" height={300}>
                      <PieChart>
                        <Pie
                          data={safeResults.chartData.pieChart}
                          cx="50%"
                          cy="50%"
                          labelLine={false}
                          label={({ name, weight }) => `${name} (${weight}%)`}
                          outerRadius={80}
                          fill="#8884d8"
                          dataKey="value"
                        >
                          {safeResults.chartData.pieChart.map((entry, index) => (
                            <Cell key={`cell-${index}`} fill={COLORS[index % COLORS.length]} />
                          ))}
                        </Pie>
                        <Tooltip />
                      </PieChart>
                    </ResponsiveContainer>
                  </CardContent>
                </Card>
              </div>

              {/* Radar Chart */}
              <Card>
                <CardHeader>
                  <CardTitle>能力雷達圖</CardTitle>
                  <CardDescription>各項能力的綜合表現分析</CardDescription>
                </CardHeader>
                <CardContent>
                  <ResponsiveContainer width="100%" height={400}>
                    <RadarChart data={safeResults.chartData.radarChart}>
                      <PolarGrid />
                      <PolarAngleAxis dataKey="subject" />
                      <PolarRadiusAxis domain={[0, 10]} />
                      <Radar name="得分" dataKey="score" stroke="#0891b2" fill="#0891b2" fillOpacity={0.3} />
                    </RadarChart>
                  </ResponsiveContainer>
                </CardContent>
              </Card>
            </TabsContent>

            <TabsContent value="suggestions" className="space-y-6">
              <Card>
                <CardHeader>
                  <CardTitle>整體改進建議</CardTitle>
                  <CardDescription>{safeResults.improvementSuggestions.overallSuggestions}</CardDescription>
                </CardHeader>
                <CardContent className="space-y-6">
                  <div>
                    <h4 className="font-medium mb-3 text-green-700">繼續保持的優勢</h4>
                    <div className="grid md:grid-cols-2 gap-4">
                      {safeResults.improvementSuggestions.maintainStrengths.map((strength, index) => (
                        <div key={index} className="p-4 bg-green-50 rounded-lg">
                          <h5 className="font-medium mb-2">{strength.title}</h5>
                          <p className="text-sm text-muted-foreground">
                            {strength.description}
                          </p>
                        </div>
                      ))}
                    </div>
                  </div>

                  <div>
                    <h4 className="font-medium mb-3 text-orange-700">重點改進方向</h4>
                    <div className="space-y-4">
                      {safeResults.improvementSuggestions.keyImprovements.map((improvement, index) => (
                        <div key={index} className="p-4 bg-orange-50 rounded-lg">
                          <h5 className="font-medium mb-2">{improvement.title}</h5>
                          <p className="text-sm text-muted-foreground mb-3">{improvement.description}</p>
                          <ul className="text-sm space-y-1">
                            {improvement.suggestions.map((suggestion, sIndex) => (
                              <li key={sIndex}>• {suggestion}</li>
                            ))}
                          </ul>
                        </div>
                      ))}
                    </div>
                  </div>

                  <div>
                    <h4 className="font-medium mb-3 text-blue-700">下一步行動計劃</h4>
                    <div className="space-y-3">
                      {safeResults.improvementSuggestions.actionPlan.map((action, index) => (
                        <div key={index} className="flex items-start gap-3 p-3 bg-blue-50 rounded-lg">
                          <div className="w-6 h-6 bg-blue-600 text-white rounded-full flex items-center justify-center text-sm font-bold">
                            {index + 1}
                          </div>
                          <div>
                            <h5 className="font-medium">{action.phase}</h5>
                            <p className="text-sm text-muted-foreground">{action.description}</p>
                          </div>
                        </div>
                      ))}
                    </div>
                  </div>
                </CardContent>
              </Card>
            </TabsContent>
          </Tabs>
        </div>
      </main>
    </div>
  )
}