import React, { useState, useEffect } from 'react'
import { APP_VERSION } from '../config/version'

export default function List() {
  const [collections, setCollections] = useState([])
  const [loading, setLoading] = useState(true)
  const [filter, setFilter] = useState('')
  const [filterType, setFilterType] = useState('')
  const urlParams = new URLSearchParams(window.location.hash.split('?')[1] || '')
  const urlUserId = urlParams.get('userId') || ''
  const [userIdFilter, setUserIdFilter] = useState(urlUserId)
  const [sortField, setSortField] = useState('createdAt')
  const [sortOrder, setSortOrder] = useState('desc')
  const [viewMode, setViewMode] = useState('list')
  const [key, setKey] = useState(0)
  const [search, setSearch] = useState('')
  const [isAdmin, setIsAdmin] = useState(false)

  useEffect(() => {
    // 检查是否管理员
    const userStr = localStorage.getItem('user')
    if (userStr) {
      try {
        const user = JSON.parse(userStr)
        setIsAdmin(user.role === 'admin')
      } catch (e) {}
    }
    
    // 监听hash变化，重新读取筛选参数
    const handleHashChange = () => {
      const params = new URLSearchParams(window.location.hash.split('?')[1] || '')
      // 支持两种格式：filter=category&value=自持 或 filter=category=自持
      let filterTypeParam = params.get('filter') || ''
      let valueParam = params.get('value') || ''
      
      if (filterTypeParam && valueParam) {
        // 新格式：filter=category&value=自持
        setFilterType(filterTypeParam)
        setFilter(decodeURIComponent(valueParam))
      } else if (filterTypeParam && filterTypeParam.includes('=')) {
        // 旧格式：filter=category=自持
        const [type, value] = filterTypeParam.split('=')
        setFilterType(type)
        setFilter(decodeURIComponent(value))
      } else {
        setFilter('')
        setFilterType('')
      }
      fetchCollections()
    }
    
    handleHashChange()
    window.addEventListener('hashchange', handleHashChange)
    window.addEventListener('focus', fetchCollections)

    return () => { 
      window.removeEventListener('hashchange', handleHashChange)
      window.removeEventListener('focus', fetchCollections)
    }
  }, [])

  const fetchCollections = async () => {
    setLoading(true)
    const token = localStorage.getItem('token')
    try {
      const res = await fetch('/api/collections?limit=100', {
        headers: token ? { 'Authorization': 'Bearer ' + token } : {}
      })
      
      // 处理 401 未授权错误
      if (res.status === 401) {
        localStorage.removeItem('token')
        localStorage.removeItem('user')
        window.location.hash = '#/login'
        return
      }
      
      const data = await res.json()
      // 新格式直接返回数组或 {data: [], pagination: {}}
      let list = data.data || data
      if (!Array.isArray(list) && list && Array.isArray(list.items)) {
        list = list.items
      }
      
      // 应用筛选条件
      // 用户ID筛选（从URL获取）
      if (userIdFilter) {
        list = list.filter(item => item.userId === userIdFilter || item.userId === userIdFilter.replace(/-/g, ''))
      }
      
      if (filterType && filter) {
        const fieldMap = {
          status: 'status',
          category: 'category',
          packaging: 'packaging',
          rarity: 'rarity',
          version: 'version',
          gradingCompany: 'gradingCompany',
          gradingScore: 'gradingScore',
          specialMark: 'specialMark',
          profitLoss: 'profitLoss'
        }
        const field = fieldMap[filterType] || filterType
        
        if (filterType === 'profitLoss') {
          // 盈亏筛选：需要计算出售价和总成本
          list = list.filter(item => {
            if (item.status !== 'sold') return false  // 只筛选已售
            const totalCost = (item.costPrice || 0) + (item.repairFee || 0) + (item.gradingFee || 0)
            const isProfit = item.goalPrice > totalCost
            return filter === 'profit' ? isProfit : !isProfit
          })
        } else {
          list = list.filter(item => {
            const value = item[field] || item[filterType]
            return value === filter
          })
        }
        console.log(`筛选：${filterType} = ${filter}, 结果：${list.length}条`)
      }
      
      setCollections(list || [])
    } catch (e) {
      console.error('Fetch collections error:', e)
      // 网络错误也跳转到登录页
      localStorage.removeItem('token')
      localStorage.removeItem('user')
      window.location.hash = '#/login'
    }
    setLoading(false)
  }

  const refresh = () => {
    setKey(k => k + 1)
  }

  useEffect(() => {
    window.refreshList = refresh
    return () => { delete window.refreshList }
  }, [])

  const goDetail = (id) => {
    // 保存当前列表的URL（包含筛选条件），用于返回时恢复
    sessionStorage.setItem('lastListUrl', window.location.hash.substring(1))
    window.location.hash = '#/detail?id=' + id
  }

  // 获取筛选字段的中文标签
  const getFilterLabel = (type) => {
    const labels = {
      status: '状态',
      category: '持仓类型',
      packaging: '包装',
      rarity: '珍惜度',
      version: '版别',
      gradingCompany: '评级公司',
      gradingScore: '评级分数',
      specialMark: '特殊标识',
      profitLoss: '盈亏'
    }
    return labels[type] || type
  }

  // 获取筛选条件值的中文显示
  const getFilterValueLabel = (type, value) => {
    const valueLabels = {
      status: {
        in_collection: '收藏中',
        selling: '出售中',
        sold: '已售',
        grading: '送评中',
        repairing: '修复中',
        transit: '在途中',
        seeking: '寻号中',
        other: '其他'
      },
      category: {
        自持: '自持',
        寄存: '寄存',
        寄售: '寄售',
        共有: '共有',
        寻号: '寻号',
        其他: '其他'
      },
      packaging: {
        标十: '标十',
        标百: '标百',
        单张: '单张',
        裸钞: '裸钞'
      },
      rarity: {
        通货: '通货',
        特色: '特色',
        少见: '少见',
        稀有: '稀有',
        珍品: '珍品',
        孤品: '孤品'
      },
      profitLoss: {
        profit: '盈利',
        loss: '亏损'
      },
      isGraded: {
        true: '已评级',
        false: '未评级'
      }
    }
    const typeLabels = valueLabels[type]
    if (typeLabels) {
      return typeLabels[value] || value
    }
    return value
  }

  const versions = collections && collections.length ? [...new Set(collections.map(c => c.version).filter(v => v))] : []

  // 筛选和排序
  const filteredCollections = collections.filter(c => {
    // 筛选条件
    if (filter && filterType) {
      if (filterType === 'profitLoss') {
        if (c.status !== 'sold') return false
        if (filter === 'profit') return c.goalPrice > c.costPrice
        return c.goalPrice <= c.costPrice
      } else if (filterType === 'isGraded') {
        if (c.isGraded !== (filter === 'true')) return false
      } else if (c[filterType] !== filter) {
        return false
      }
    }
    // 搜索 - 全字段搜索
    if (search) {
      const s = search.toLowerCase().trim()
      // 收集所有可搜索字段
      const allFields = [
        // 基本信息
        c.name, c.code, c.prefixSerial, c.version, 
        c.status, c.category, c.packaging, c.rarity,
        // 评级信息
        c.gradingCompany, c.gradingScore, c.specialMark,
        c.isGraded ? '已评级' : '未评级',
        c.threeStar ? '三星' : '',
        // 价格信息
        c.targetPrice?.toString(), c.costPrice?.toString(), c.goalPrice?.toString(),
        c.repairFee?.toString(), c.gradingFee?.toString(),
        // 其他
        c.remark, c.purpose, c.material, c.denomination,
        c.issueYear, c.issueQuantity, c.serialFeature, c.issuer,
        // 用户信息
        c.username || '', c.userId || ''
      ].filter(v => v !== undefined && v !== null).map(v => v.toString().toLowerCase())
      
      if (!allFields.some(f => f.includes(s))) {
        return false
      }
    }
    return true
  }).sort((a, b) => {
    let aVal = a[sortField]
    let bVal = b[sortField]
    if (sortField === 'createdAt') {
      aVal = new Date(a.createdAt || 0).getTime()
      bVal = new Date(b.createdAt || 0).getTime()
    } else if (sortField === 'code') {
      // 编号按数字排序，提取数字部分
      aVal = parseInt(a.code?.replace(/\D/g, '') || '0', 10)
      bVal = parseInt(b.code?.replace(/\D/g, '') || '0', 10)
    } else if (sortField === 'prefixSerial') {
      // 冠字号按字母排序
      aVal = a.prefixSerial || ''
      bVal = b.prefixSerial || ''
    } else if (['costPrice', 'targetPrice', 'goalPrice', 'gradingScore'].includes(sortField)) {
      // 价格和分数按数字排序
      aVal = parseFloat(aVal) || 0
      bVal = parseFloat(bVal) || 0
    } else if (sortField === 'rarity') {
      // 珍惜度按等级排序
      const rarityOrder = { '通货': 1, '特色': 2, '少见': 3, '稀有': 4, '珍品': 5, '孤品': 6 }
      aVal = rarityOrder[aVal] || 0
      bVal = rarityOrder[bVal] || 0
    }
    if (aVal == null) return 1
    if (bVal == null) return -1
    if (sortOrder === 'asc') {
      return aVal > bVal ? 1 : -1
    }
    return aVal < bVal ? 1 : -1
  })

  const clearFilter = () => {
    setFilter('')
    setFilterType('')
    window.location.hash = '#/stats'
  }

  const getStatusText = (status) => {
    const map = { 
      'in_collection': '收藏中', 
      'selling': '出售中', 
      'sold': '已售', 
      'grading': '送评中', 
      'repairing': '修复中', 
      'transit': '在途中', 
      'seeking': '寻号中',
      'other': '其他' 
    }
    return map[status] || status || '-'
  }

  const getCategoryText = (category) => {
    const map = { '自持': '自持', '寄存': '寄存', '寄售': '寄售', '共有': '共有', '其他': '其他' }
    return map[category] || category || '自持'
  }

  const getCategoryColor = (category) => {
    const colors = { '自持': '#22c55e', '寄存': '#3b82f6', '寄售': '#f59e0b', '共有': '#8b5cf6', '其他': '#64748b' }
    return colors[category] || '#64748b'
  }

  const getStatusColor = (status) => {
    const colors = { 
      'in_collection': '#22c55e', 
      'selling': '#f59e0b', 
      'sold': '#ef4444', 
      'grading': '#8b5cf6', 
      'repairing': '#f97316', 
      'transit': '#06b6d4', 
      'seeking': '#ec4899',
      'other': '#64748b' 
    }
    return colors[status] || '#64748b'
  }

  const getVersionColor = (version) => {
    if (!version) return { bg: 'rgba(255,255,255,0.08)', color: '#94a3b8' }
    const v = version.toLowerCase()
    if (v.includes('龙')) return { bg: 'linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%)', color: '#1e293b' }
    if (v.includes('蛇')) return { bg: 'linear-gradient(135deg, #ec4899 0%, #db2777 100%)', color: '#fff' }
    if (v.includes('马')) return { bg: 'linear-gradient(135deg, #ef4444 0%, #dc2626 100%)', color: '#fff' }
    if (v.includes('羊')) return { bg: 'linear-gradient(135deg, #f97316 0%, #ea580c 100%)', color: '#fff' }
    if (v.includes('猴')) return { bg: 'linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%)', color: '#fff' }
    if (v.includes('鸡')) return { bg: 'linear-gradient(135deg, #f59e0b 0%, #d97706 100%)', color: '#1e293b' }
    if (v.includes('狗')) return { bg: 'linear-gradient(135deg, #6366f1 0%, #4f46e5 100%)', color: '#fff' }
    if (v.includes('猪')) return { bg: 'linear-gradient(135deg, #ec4899 0%, #be185d 100%)', color: '#fff' }
    if (v.includes('鼠')) return { bg: 'linear-gradient(135deg, #64748b 0%, #475569 100%)', color: '#fff' }
    if (v.includes('牛')) return { bg: 'linear-gradient(135deg, #22c55e 0%, #16a34a 100%)', color: '#fff' }
    if (v.includes('虎')) return { bg: 'linear-gradient(135deg, #f97316 0%, #ea580c 100%)', color: '#fff' }
    if (v.includes('兔')) return { bg: 'linear-gradient(135deg, #f43f5e 0%, #e11d48 100%)', color: '#fff' }
    return { bg: 'linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%)', color: '#1e293b' }
  }

  const ListItem = ({ item }) => (
    <div onClick={() => goDetail(item.id)} style={{ background: 'rgba(255,255,255,0.03)', border: '1px solid rgba(255,255,255,0.05)', borderRadius: '12px', padding: '14px', marginBottom: '10px', cursor: 'pointer' }}>
      <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center' }}>
        <div style={{ flex: 1 }}>
          <div style={{ display: 'flex', alignItems: 'center', gap: '8px' }}>
            <div style={{ color: '#fff', fontSize: '15px', fontWeight: '500' }}>{item.code || '-'}</div>
            {isAdmin && item.owner_name && <div style={{ color: '#60a5fa', fontSize: '11px', padding: '2px 6px', background: 'rgba(96, 165, 250, 0.2)', borderRadius: '4px' }}>👤 {item.owner_name}</div>}
          </div>
          <div style={{ color: '#fbbf24', fontSize: '13px', fontFamily: 'monospace', marginTop: '4px' }}>{item.prefixSerial || '-'}</div>
        </div>
        <div style={{ textAlign: 'right' }}>
          {item.category && <div style={{ color: getCategoryColor(item.category), fontSize: '12px', padding: '3px 10px', background: getCategoryColor(item.category) + '20', borderRadius: '4px', display: 'inline-block', marginBottom: '4px' }}>{getCategoryText(item.category)}</div>}
          {item.rarity && <div style={{ color: '#8b5cf6', fontSize: '12px', padding: '3px 10px', background: 'rgba(139, 92, 246, 0.2)', borderRadius: '4px', display: 'inline-block', marginBottom: '4px' }}>{item.rarity}</div>}
          <div style={{ color: getStatusColor(item.status), fontSize: '12px', padding: '3px 10px', background: getStatusColor(item.status) + '20', borderRadius: '4px', display: 'inline-block' }}>{getStatusText(item.status)}</div>
          {item.gradingScore && <div style={{ color: '#fbbf24', fontSize: '14px', fontWeight: 'bold', marginTop: '6px' }}>{item.gradingScore}</div>}
        </div>
      </div>
      <div style={{ display: 'flex', gap: '8px', marginTop: '10px', flexWrap: 'wrap' }}>
        {item.version && <span style={{ background: getVersionColor(item.version).bg, color: getVersionColor(item.version).color, fontSize: '12px', fontWeight: 'bold', padding: '4px 10px', borderRadius: '4px' }}>{item.version}</span>}
        {item.packaging && <span style={{ background: 'rgba(255,255,255,0.08)', color: '#94a3b8', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>{item.packaging}</span>}
        {item.isGraded ? <span style={{ background: 'rgba(251, 191, 36, 0.15)', color: '#fbbf24', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>已评级</span> : <span style={{ background: 'rgba(255,255,255,0.08)', color: '#64748b', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>未评级</span>}
        {item.gradingCompany && <span style={{ background: 'rgba(251, 191, 36, 0.15)', color: '#fbbf24', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>{item.gradingCompany}</span>}
        {item.threeStar && <span style={{ background: 'rgba(251, 191, 36, 0.15)', color: '#fbbf24', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>三星</span>}
        {item.specialMark && <span style={{ background: 'rgba(139, 92, 246, 0.15)', color: '#8b5cf6', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>{item.specialMark}</span>}
        {item.remark && <span style={{ background: 'rgba(100,116,139,0.2)', color: '#94a3b8', fontSize: '11px', padding: '2px 8px', borderRadius: '4px' }}>{item.remark}</span>}
      </div>
      <div style={{ display: 'flex', justifyContent: 'space-between', marginTop: '10px', paddingTop: '8px', borderTop: '1px solid rgba(255,255,255,0.05)' }}>
        {item.costPrice && <span style={{ color: '#94a3b8', fontSize: '12px' }}>成本: <span style={{ color: '#fff' }}>¥{item.costPrice}</span></span>}
        {item.targetPrice && <span style={{ color: '#94a3b8', fontSize: '12px' }}>目标: <span style={{ color: '#f59e0b' }}>¥{item.targetPrice}</span></span>}
        {item.goalPrice && <span style={{ color: '#94a3b8', fontSize: '12px' }}>出售: <span style={{ color: '#22c55e' }}>¥{item.goalPrice}</span></span>}
        {item.repairFee && <span style={{ color: '#94a3b8', fontSize: '12px' }}>修复: <span style={{ color: '#fff' }}>¥{item.repairFee}</span></span>}
        {item.gradingFee && <span style={{ color: '#94a3b8', fontSize: '12px' }}>评级: <span style={{ color: '#fff' }}>¥{item.gradingFee}</span></span>}
      </div>
    </div>
  )

  return (
    <div style={{ minHeight: '100vh', overflowY: 'auto', background: '#0f172a', paddingBottom: '70px' }}>
      <div style={{ padding: '20px', background: 'rgba(255,255,255,0.02)', borderBottom: '1px solid rgba(255,255,255,0.05)' }}>
        <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between', marginBottom: '16px' }}>
          <div style={{ color: '#fff', fontSize: '20px', fontWeight: 'bold' }}>我的藏品 <span style={{ fontSize: '14px', color: '#fbbf24' }}>({filteredCollections.length})</span></div>
          <div style={{ display: 'flex', alignItems: 'center', gap: '12px' }}>
            {filter && filterType && (
              <button 
                onClick={() => {
                  setFilter('')
                  setFilterType('')
                  window.location.hash = '#/list'
                }}
                style={{ background: 'rgba(239, 68, 68, 0.2)', color: '#ef4444', border: 'none', borderRadius: '6px', padding: '6px 12px', fontSize: '13px', cursor: 'pointer' }}
              >
                ✕ 清除筛选
              </button>
            )}
            <div style={{ color: 'rgba(255,255,255,0.3)', fontSize: '11px' }}>v{APP_VERSION}</div>
          </div>
        </div>
        
        {filter && filterType && (
          <div style={{ background: 'rgba(59, 130, 246, 0.1)', border: '1px solid rgba(59, 130, 246, 0.3)', borderRadius: '8px', padding: '12px', marginBottom: '16px' }}>
            <div style={{ color: '#60a5fa', fontSize: '13px', fontWeight: 'bold' }}>当前筛选：</div>
            <div style={{ color: '#fff', fontSize: '14px', marginTop: '4px' }}>
              {getFilterLabel(filterType)} = <span style={{ color: '#fbbf24', fontWeight: 'bold' }}>{getFilterValueLabel(filterType, filter)}</span>
            </div>
          </div>
        )}
        
        {/* 搜索框 - 全字段搜索 */}
        <div style={{ position: 'relative', marginBottom: '16px' }}>
          <input type="text" 
            placeholder="🔍 搜索任意字段：名称、编号、冠字号、版别、评级公司、分数、价格..." 
            value={search}
            onChange={e => setSearch(e.target.value)}
            style={{ 
              background: 'rgba(255,255,255,0.05)', 
              border: search ? '1px solid rgba(59, 130, 246, 0.5)' : '1px solid rgba(255,255,255,0.1)', 
              color: '#fff', 
              width: '100%', 
              boxSizing: 'border-box', 
              padding: '12px 40px 12px 12px', 
              borderRadius: '12px', 
              fontSize: '14px',
              outline: 'none',
              transition: 'border-color 0.2s'
            }} 
          />
          {search && (
            <button 
              onClick={() => setSearch('')}
              style={{ 
                position: 'absolute', 
                right: '12px', 
                top: '50%', 
                transform: 'translateY(-50%)',
                background: 'rgba(255,255,255,0.1)', 
                border: 'none', 
                borderRadius: '50%', 
                width: '24px', 
                height: '24px', 
                color: '#fff',
                fontSize: '16px',
                cursor: 'pointer',
                display: 'flex',
                alignItems: 'center',
                justifyContent: 'center'
              }}
            >
              ✕
            </button>
          )}
        </div>
        
        {/* 排序表头按钮 */}
        <div style={{ display: 'flex', gap: '6px', alignItems: 'center', flexWrap: 'wrap', marginBottom: '12px' }}>
          <span style={{ color: '#94a3b8', fontSize: '13px', marginRight: '4px' }}>排序:</span>
          {[
            { key: 'code', label: '编号' },
            { key: 'prefixSerial', label: '冠字号' },
            { key: 'costPrice', label: '成本' },
            { key: 'goalPrice', label: '售价' },
            { key: 'category', label: '持仓类型' },
            { key: 'rarity', label: '珍惜度' },
            { key: 'gradingScore', label: '评级分数' }
          ].map(item => (
            <div key={item.key} onClick={() => {
              if (sortField === item.key) {
                setSortOrder(sortOrder === 'asc' ? 'desc' : 'asc')
              } else {
                setSortField(item.key)
                setSortOrder('desc')
              }
            }} style={{ 
              padding: '8px 14px', 
              borderRadius: '8px', 
              fontSize: '13px',
              cursor: 'pointer',
              background: sortField === item.key ? (sortOrder === 'asc' ? '#22c55e' : '#fbbf24') : 'rgba(255,255,255,0.08)',
              color: sortField === item.key ? '#fff' : '#94a3b8',
              fontWeight: sortField === item.key ? 'bold' : 'normal',
              border: sortField === item.key ? 'none' : '1px solid rgba(255,255,255,0.1)'
            }}>
              {item.label} {sortField === item.key && (sortOrder === 'asc' ? '↑' : '↓')}
            </div>
          ))}
        </div>
      </div>

      <div style={{ padding: '16px' }}>
        {loading ? (
          <div style={{ textAlign: 'center', padding: '60px', color: '#64748b' }}>加载中...</div>
        ) : filteredCollections.length === 0 ? (
          <div style={{ textAlign: 'center', padding: '60px 0' }}><div style={{ fontSize: '50px', opacity: 0.3 }}>📭</div><div style={{ color: '#64748b', marginTop: '16px' }}>{filter ? '暂无符合筛选条件的藏品' : '暂无藏品'}</div></div>
        ) : viewMode === 'grid' ? (
          <div style={{ display: 'grid', gridTemplateColumns: 'repeat(2, 1fr)', gap: '12px' }}>
            {filteredCollections.map(item => (
              <div key={item.id} onClick={() => goDetail(item.id)} style={{ background: 'rgba(255,255,255,0.03)', border: '1px solid rgba(255,255,255,0.05)', borderRadius: '12px', padding: '12px', cursor: 'pointer' }}>
                <div style={{ height: '80px', background: 'rgba(255,255,255,0.03)', borderRadius: '8px', display: 'flex', alignItems: 'center', justifyContent: 'center', fontSize: '32px', marginBottom: '10px' }}>🐉</div>
                <div style={{ color: '#fff', fontSize: '14px', fontWeight: '500' }}>{item.code || '-'}</div>
                <div style={{ color: '#fbbf24', fontSize: '12px', fontFamily: 'monospace', marginTop: '2px' }}>{item.prefixSerial || '-'}</div>
                <div style={{ display: 'flex', gap: '4px', marginTop: '6px', flexWrap: 'wrap' }}>
                  {item.gradingScore && <span style={{ color: '#fbbf24', fontSize: '12px', fontWeight: 'bold' }}>{item.gradingScore}</span>}
                  {item.threeStar && <span style={{ color: '#fbbf24', fontSize: '10px' }}>⭐⭐⭐</span>}
                </div>
              </div>
            ))}
          </div>
        ) : (
          filteredCollections.map(item => <ListItem key={item.id} item={item} />)
        )}
      </div>
    </div>
  )
}