'use client'

/**
 * RecentIssuesList - #42 近期錯誤列表
 * ====================================
 * Phase 10: Sentry + OpenClaw + UI 整合
 *
 * Nothing.tech 視覺規範:
 * - 純白底色 (bg-white)
 * - 極細淺灰邊框 (border border-gray-200)
 * - 無圓角或微圓角 (rounded-sm)
 * - 嚴禁陰影 (shadow-none)
 *
 * 建立: 2026-03-26 (台北時區)
 * 建立者: Claude Code (#42 Error UI)
 */

import { useState } from 'react'
import { useTranslations } from 'next-intl'
import { cn } from '@/lib/utils'
import { AlertTriangle, Bug, Clock, Users, ChevronRight, Sparkles, ExternalLink } from 'lucide-react'
import type { SentryIssue, ErrorAnalysisResponse } from '@/lib/api-client'
import { apiClient } from '@/lib/api-client'

// =============================================================================
// Level Config
// =============================================================================

const LEVEL_CONFIG = {
  fatal: {
    color: 'text-red-700',
    bgColor: 'bg-red-50',
    borderColor: 'border-red-200',
    icon: AlertTriangle,
  },
  error: {
    color: 'text-orange-700',
    bgColor: 'bg-orange-50',
    borderColor: 'border-orange-200',
    icon: Bug,
  },
  warning: {
    color: 'text-amber-700',
    bgColor: 'bg-amber-50',
    borderColor: 'border-amber-200',
    icon: AlertTriangle,
  },
  info: {
    color: 'text-blue-700',
    bgColor: 'bg-blue-50',
    borderColor: 'border-blue-200',
    icon: Bug,
  },
} as const

// =============================================================================
// Component Props
// =============================================================================

interface RecentIssuesListProps {
  issues: SentryIssue[]
  loading?: boolean
  error?: string | null
  onIssueClick?: (issue: SentryIssue) => void
  className?: string
}

// =============================================================================
// Issue Item Component
// =============================================================================

function IssueItem({
  issue,
  onClick,
}: {
  issue: SentryIssue
  onClick?: () => void
}) {
  const t = useTranslations('errors')
  const [analyzing, setAnalyzing] = useState(false)
  const [analysis, setAnalysis] = useState<ErrorAnalysisResponse | null>(null)

  const levelConfig = LEVEL_CONFIG[issue.level] || LEVEL_CONFIG.error
  const LevelIcon = levelConfig.icon

  // Format relative time (i18n compliant)
  const lastSeen = new Date(issue.last_seen)
  const now = new Date()
  const diffMs = now.getTime() - lastSeen.getTime()
  const diffMins = Math.floor(diffMs / 60000)
  const diffHours = Math.floor(diffMs / 3600000)
  const diffDays = Math.floor(diffMs / 86400000)

  let timeAgo: string
  if (diffMins < 60) {
    timeAgo = t('timeAgo.minutes', { count: diffMins })
  } else if (diffHours < 24) {
    timeAgo = t('timeAgo.hours', { count: diffHours })
  } else {
    timeAgo = t('timeAgo.days', { count: diffDays })
  }

  const handleAnalyze = async (e: React.MouseEvent) => {
    e.stopPropagation()
    setAnalyzing(true)
    try {
      const result = await apiClient.analyzeError(issue.id)
      setAnalysis(result)
    } catch (err) {
      console.error('Error analyzing issue:', err)
    } finally {
      setAnalyzing(false)
    }
  }

  return (
    <div
      onClick={onClick}
      className={cn(
        'border-b border-gray-100 last:border-b-0 p-3 hover:bg-gray-50 cursor-pointer transition-colors',
      )}
    >
      {/* Main Row */}
      <div className="flex items-start gap-3">
        {/* Level Badge */}
        <div className={cn(
          'px-1.5 py-0.5 rounded text-xs font-medium',
          levelConfig.bgColor,
          levelConfig.color,
        )}>
          <LevelIcon className="h-3 w-3 inline mr-1" />
          {issue.level}
        </div>

        {/* Content */}
        <div className="flex-1 min-w-0">
          {/* Title */}
          <div className="text-sm font-medium text-gray-900 truncate">
            {issue.title}
          </div>

          {/* Culprit */}
          {issue.culprit && (
            <div className="text-xs text-gray-500 truncate mt-0.5">
              {issue.culprit}
            </div>
          )}

          {/* Meta */}
          <div className="flex items-center gap-3 mt-1.5 text-xs text-gray-500">
            <span className="flex items-center gap-1">
              <Bug className="h-3 w-3" />
              {issue.count.toLocaleString()}
            </span>
            <span className="flex items-center gap-1">
              <Users className="h-3 w-3" />
              {issue.user_count}
            </span>
            <span className="flex items-center gap-1">
              <Clock className="h-3 w-3" />
              {timeAgo}
            </span>
            <span className="text-gray-400">
              {issue.short_id}
            </span>
          </div>
        </div>

        {/* Actions */}
        <div className="flex items-center gap-2">
          {/* AI Analyze Button */}
          <button
            onClick={handleAnalyze}
            disabled={analyzing}
            className={cn(
              'flex items-center gap-1 px-2 py-1 text-xs rounded',
              'bg-purple-50 text-purple-700 hover:bg-purple-100',
              'border border-purple-200 transition-colors',
              analyzing && 'opacity-50 cursor-not-allowed',
            )}
          >
            <Sparkles className={cn('h-3 w-3', analyzing && 'animate-pulse')} />
            {analyzing ? t('analyzing') : t('aiAnalyze')}
          </button>

          {/* External Link */}
          {issue.permalink && (
            <a
              href={issue.permalink}
              target="_blank"
              rel="noopener noreferrer"
              onClick={(e) => e.stopPropagation()}
              className="text-gray-400 hover:text-gray-600"
            >
              <ExternalLink className="h-4 w-4" />
            </a>
          )}

          <ChevronRight className="h-4 w-4 text-gray-400" />
        </div>
      </div>

      {/* AI Analysis Result */}
      {analysis && analysis.status === 'completed' && analysis.analysis && (
        <div className="mt-3 p-3 bg-purple-50 border border-purple-100 rounded-sm">
          <div className="flex items-center gap-2 mb-2">
            <Sparkles className="h-4 w-4 text-purple-600" />
            <span className="text-sm font-medium text-purple-800">{t('aiAnalysis')}</span>
            <span className={cn(
              'text-xs px-1.5 py-0.5 rounded',
              analysis.analysis.severity === 'CRITICAL' ? 'bg-red-100 text-red-700' :
              analysis.analysis.severity === 'HIGH' ? 'bg-orange-100 text-orange-700' :
              analysis.analysis.severity === 'MEDIUM' ? 'bg-amber-100 text-amber-700' :
              'bg-gray-100 text-gray-700'
            )}>
              {analysis.analysis.severity}
            </span>
          </div>

          <div className="text-sm text-purple-900 mb-2">
            <strong>{t('rootCause')}:</strong> {analysis.analysis.root_cause}
          </div>

          <div className="text-sm text-purple-800">
            <strong>{t('fixSummary')}:</strong> {analysis.analysis.fix_recommendation.summary}
          </div>

          <div className="mt-2 text-xs text-purple-600">
            {t('category')}: {analysis.analysis.category} | {t('confidence')}: {(analysis.analysis.confidence * 100).toFixed(0)}%
          </div>
        </div>
      )}
    </div>
  )
}

// =============================================================================
// Main Component
// =============================================================================

export function RecentIssuesList({
  issues,
  loading = false,
  error = null,
  onIssueClick,
  className,
}: RecentIssuesListProps) {
  const t = useTranslations('errors')

  // Loading state
  if (loading) {
    return (
      <div className={cn(
        'bg-white border border-gray-200 rounded-sm',
        className
      )}>
        <div className="p-3 border-b border-gray-100">
          <div className="h-4 bg-gray-200 rounded w-1/4 animate-pulse" />
        </div>
        <div className="divide-y divide-gray-100">
          {[1, 2, 3].map((i) => (
            <div key={i} className="p-3 animate-pulse">
              <div className="flex items-start gap-3">
                <div className="h-5 w-12 bg-gray-200 rounded" />
                <div className="flex-1 space-y-2">
                  <div className="h-4 bg-gray-200 rounded w-3/4" />
                  <div className="h-3 bg-gray-100 rounded w-1/2" />
                </div>
              </div>
            </div>
          ))}
        </div>
      </div>
    )
  }

  // Error state
  if (error) {
    return (
      <div className={cn(
        'bg-white border border-red-200 rounded-sm p-4',
        className
      )}>
        <div className="flex items-center gap-2 text-red-600">
          <AlertTriangle className="h-4 w-4" />
          <span className="text-sm">{error}</span>
        </div>
      </div>
    )
  }

  // Empty state
  if (issues.length === 0) {
    return (
      <div className={cn(
        'bg-white border border-gray-200 rounded-sm p-6',
        className
      )}>
        <div className="text-center text-gray-500">
          <Bug className="h-8 w-8 mx-auto mb-2 opacity-50" />
          <p className="text-sm">{t('noIssues')}</p>
        </div>
      </div>
    )
  }

  return (
    <div className={cn(
      'bg-white border border-gray-200 rounded-sm',
      className
    )}>
      {/* Header */}
      <div className="px-3 py-2 border-b border-gray-100 flex items-center justify-between">
        <div className="flex items-center gap-2">
          <Bug className="h-4 w-4 text-gray-600" />
          <h3 className="text-sm font-medium text-gray-900">{t('recentIssues')}</h3>
          <span className="text-xs text-gray-500">({issues.length})</span>
        </div>
      </div>

      {/* Issues List */}
      <div className="max-h-96 overflow-y-auto">
        {issues.map((issue) => (
          <IssueItem
            key={issue.id}
            issue={issue}
            onClick={() => onIssueClick?.(issue)}
          />
        ))}
      </div>
    </div>
  )
}