'use client'

import { useState } from 'react'
import { useRouter, useParams } from 'next/navigation'
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/Card'
import { Button } from '@/components/ui/Button'
import { SuccessTag, WarningTag, ErrorTag } from '@/components/ui/Tag'
import {
  ArrowLeft,
  FileText,
  Upload,
  CheckCircle,
  Plus,
  X,
  Save,
  Sparkles,
  Target,
  Ban,
  AlertTriangle
} from 'lucide-react'

// 模拟 Brief 详情
const mockBrief = {
  id: 'brief-001',
  projectName: 'XX品牌618推广',
  brandName: 'XX护肤品牌',
  status: 'configured',
  fileName: 'XX品牌618推广Brief.pdf',
  uploadedAt: '2026-02-01',
  configuredAt: '2026-02-02',
  sellingPoints: [
    { id: 'sp1', content: 'SPF50+ PA++++', required: true },
    { id: 'sp2', content: '轻薄质地，不油腻', required: true },
    { id: 'sp3', content: '延展性好，易推开', required: false },
    { id: 'sp4', content: '适合敏感肌', required: false },
    { id: 'sp5', content: '夏日必备防晒', required: true },
  ],
  blacklistWords: [
    { id: 'bw1', word: '最好', reason: '绝对化用语' },
    { id: 'bw2', word: '第一', reason: '绝对化用语' },
    { id: 'bw3', word: '神器', reason: '夸大宣传' },
    { id: 'bw4', word: '完美', reason: '绝对化用语' },
  ],
  aiParsedContent: {
    productName: 'XX品牌防晒霜',
    targetAudience: '18-35岁女性',
    contentRequirements: '需展示产品质地、使用效果',
    restrictions: '不可提及竞品，不可使用绝对化用语',
  },
}

export default function BriefConfigPage() {
  const router = useRouter()
  const params = useParams()
  const [brief, setBrief] = useState(mockBrief)
  const [newSellingPoint, setNewSellingPoint] = useState('')
  const [newBlacklistWord, setNewBlacklistWord] = useState('')
  const [isAIParsing, setIsAIParsing] = useState(false)
  const [isSaving, setIsSaving] = useState(false)

  const handleAIParse = async () => {
    setIsAIParsing(true)
    // 模拟 AI 解析
    await new Promise(resolve => setTimeout(resolve, 2000))
    setIsAIParsing(false)
    alert('AI 解析完成！')
  }

  const addSellingPoint = () => {
    if (!newSellingPoint.trim()) return
    setBrief(prev => ({
      ...prev,
      sellingPoints: [...prev.sellingPoints, { id: `sp${Date.now()}`, content: newSellingPoint, required: false }]
    }))
    setNewSellingPoint('')
  }

  const removeSellingPoint = (id: string) => {
    setBrief(prev => ({
      ...prev,
      sellingPoints: prev.sellingPoints.filter(sp => sp.id !== id)
    }))
  }

  const toggleRequired = (id: string) => {
    setBrief(prev => ({
      ...prev,
      sellingPoints: prev.sellingPoints.map(sp =>
        sp.id === id ? { ...sp, required: !sp.required } : sp
      )
    }))
  }

  const addBlacklistWord = () => {
    if (!newBlacklistWord.trim()) return
    setBrief(prev => ({
      ...prev,
      blacklistWords: [...prev.blacklistWords, { id: `bw${Date.now()}`, word: newBlacklistWord, reason: '自定义' }]
    }))
    setNewBlacklistWord('')
  }

  const removeBlacklistWord = (id: string) => {
    setBrief(prev => ({
      ...prev,
      blacklistWords: prev.blacklistWords.filter(bw => bw.id !== id)
    }))
  }

  const handleSave = async () => {
    setIsSaving(true)
    await new Promise(resolve => setTimeout(resolve, 1000))
    setIsSaving(false)
    alert('配置已保存！')
  }

  return (
    <div className="space-y-6">
      {/* 顶部导航 */}
      <div className="flex items-center gap-4">
        <button type="button" onClick={() => router.back()} className="p-2 hover:bg-bg-elevated rounded-full">
          <ArrowLeft size={20} className="text-text-primary" />
        </button>
        <div className="flex-1">
          <h1 className="text-xl font-bold text-text-primary">{brief.projectName}</h1>
          <p className="text-sm text-text-secondary">{brief.brandName}</p>
        </div>
        <Button onClick={handleSave} disabled={isSaving}>
          <Save size={16} />
          {isSaving ? '保存中...' : '保存配置'}
        </Button>
      </div>

      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
        {/* 左侧：Brief 文件和 AI 解析 */}
        <div className="lg:col-span-2 space-y-6">
          {/* Brief 文件 */}
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <FileText size={18} className="text-accent-indigo" />
                Brief 文件
              </CardTitle>
            </CardHeader>
            <CardContent>
              <div className="flex items-center justify-between p-4 bg-bg-elevated rounded-lg">
                <div className="flex items-center gap-3">
                  <FileText size={32} className="text-accent-indigo" />
                  <div>
                    <p className="font-medium text-text-primary">{brief.fileName}</p>
                    <p className="text-sm text-text-secondary">上传于 {brief.uploadedAt}</p>
                  </div>
                </div>
                <div className="flex items-center gap-2">
                  <Button variant="secondary" size="sm">
                    预览
                  </Button>
                  <Button variant="secondary" size="sm">
                    <Upload size={14} />
                    重新上传
                  </Button>
                </div>
              </div>
            </CardContent>
          </Card>

          {/* AI 解析结果 */}
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center justify-between">
                <span className="flex items-center gap-2">
                  <Sparkles size={18} className="text-purple-400" />
                  AI 解析结果
                </span>
                <Button variant="secondary" size="sm" onClick={handleAIParse} disabled={isAIParsing}>
                  <Sparkles size={14} />
                  {isAIParsing ? '解析中...' : '重新解析'}
                </Button>
              </CardTitle>
            </CardHeader>
            <CardContent>
              <div className="grid grid-cols-2 gap-4">
                <div className="p-3 bg-bg-elevated rounded-lg">
                  <p className="text-xs text-text-tertiary mb-1">产品名称</p>
                  <p className="text-text-primary">{brief.aiParsedContent.productName}</p>
                </div>
                <div className="p-3 bg-bg-elevated rounded-lg">
                  <p className="text-xs text-text-tertiary mb-1">目标人群</p>
                  <p className="text-text-primary">{brief.aiParsedContent.targetAudience}</p>
                </div>
                <div className="p-3 bg-bg-elevated rounded-lg col-span-2">
                  <p className="text-xs text-text-tertiary mb-1">内容要求</p>
                  <p className="text-text-primary">{brief.aiParsedContent.contentRequirements}</p>
                </div>
                <div className="p-3 bg-bg-elevated rounded-lg col-span-2">
                  <p className="text-xs text-text-tertiary mb-1">限制条件</p>
                  <p className="text-text-primary">{brief.aiParsedContent.restrictions}</p>
                </div>
              </div>
            </CardContent>
          </Card>

          {/* 卖点配置 */}
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <Target size={18} className="text-accent-green" />
                卖点配置
                <span className="text-sm font-normal text-text-secondary ml-2">
                  {brief.sellingPoints.length} 个卖点
                </span>
              </CardTitle>
            </CardHeader>
            <CardContent className="space-y-3">
              {brief.sellingPoints.map((sp) => (
                <div key={sp.id} className="flex items-center gap-3 p-3 bg-bg-elevated rounded-lg">
                  <button
                    type="button"
                    onClick={() => toggleRequired(sp.id)}
                    className={`px-2 py-1 text-xs rounded ${
                      sp.required ? 'bg-accent-coral/20 text-accent-coral' : 'bg-bg-page text-text-tertiary'
                    }`}
                  >
                    {sp.required ? '必选' : '可选'}
                  </button>
                  <span className="flex-1 text-text-primary">{sp.content}</span>
                  <button
                    type="button"
                    onClick={() => removeSellingPoint(sp.id)}
                    className="p-1 hover:bg-bg-page rounded"
                  >
                    <X size={16} className="text-text-tertiary" />
                  </button>
                </div>
              ))}
              <div className="flex gap-2">
                <input
                  type="text"
                  value={newSellingPoint}
                  onChange={(e) => setNewSellingPoint(e.target.value)}
                  placeholder="添加新卖点..."
                  className="flex-1 px-3 py-2 border border-border-subtle rounded-lg bg-bg-elevated text-text-primary focus:outline-none focus:ring-2 focus:ring-accent-indigo"
                  onKeyDown={(e) => e.key === 'Enter' && addSellingPoint()}
                />
                <Button variant="secondary" onClick={addSellingPoint}>
                  <Plus size={16} />
                  添加
                </Button>
              </div>
            </CardContent>
          </Card>
        </div>

        {/* 右侧：违禁词配置 */}
        <div className="space-y-6">
          <Card>
            <CardHeader>
              <CardTitle className="flex items-center gap-2">
                <Ban size={18} className="text-accent-coral" />
                违禁词配置
                <span className="text-sm font-normal text-text-secondary ml-2">
                  {brief.blacklistWords.length} 个
                </span>
              </CardTitle>
            </CardHeader>
            <CardContent className="space-y-2">
              {brief.blacklistWords.map((bw) => (
                <div key={bw.id} className="flex items-center justify-between p-3 bg-accent-coral/10 rounded-lg border border-accent-coral/30">
                  <div>
                    <span className="font-medium text-accent-coral">「{bw.word}」</span>
                    <span className="text-xs text-text-tertiary ml-2">{bw.reason}</span>
                  </div>
                  <button
                    type="button"
                    onClick={() => removeBlacklistWord(bw.id)}
                    className="p-1 hover:bg-accent-coral/20 rounded"
                  >
                    <X size={14} className="text-text-tertiary" />
                  </button>
                </div>
              ))}
              <div className="flex gap-2 mt-3">
                <input
                  type="text"
                  value={newBlacklistWord}
                  onChange={(e) => setNewBlacklistWord(e.target.value)}
                  placeholder="添加违禁词..."
                  className="flex-1 px-3 py-2 border border-border-subtle rounded-lg bg-bg-elevated text-text-primary focus:outline-none focus:ring-2 focus:ring-accent-indigo"
                  onKeyDown={(e) => e.key === 'Enter' && addBlacklistWord()}
                />
                <Button variant="secondary" size="sm" onClick={addBlacklistWord}>
                  <Plus size={14} />
                </Button>
              </div>
            </CardContent>
          </Card>

          {/* 配置提示 */}
          <div className="p-4 bg-accent-indigo/10 rounded-lg border border-accent-indigo/30">
            <div className="flex items-start gap-3">
              <AlertTriangle size={20} className="text-accent-indigo flex-shrink-0 mt-0.5" />
              <div>
                <p className="text-sm text-accent-indigo font-medium">配置说明</p>
                <ul className="text-xs text-accent-indigo/80 mt-1 space-y-1">
                  <li>• 必选卖点必须在内容中提及</li>
                  <li>• 违禁词会触发 AI 审核警告</li>
                  <li>• 修改配置后需重新保存</li>
                </ul>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  )
}