'use client'

/**
 * ComplianceTrendChart Component
 *
 * Displays compliance score trend over time using Recharts.
 * Shows 12-month history with interactive tooltip.
 */

import {
  LineChart,
  Line,
  XAxis,
  YAxis,
  CartesianGrid,
  Tooltip,
  ResponsiveContainer,
  Area,
  AreaChart,
} from 'recharts'
import { Language, getTerm } from '@/lib/compliance-i18n'

interface TrendDataPoint {
  date: string
  score: number
  label?: string
}

interface ComplianceTrendChartProps {
  data: TrendDataPoint[]
  lang?: Language
  height?: number
  showArea?: boolean
}

export default function ComplianceTrendChart({
  data,
  lang = 'de',
  height = 200,
  showArea = true,
}: ComplianceTrendChartProps) {
  if (!data || data.length === 0) {
    return (
      <div
        className="flex items-center justify-center text-slate-400 text-sm"
        style={{ height }}
      >
        {lang === 'de' ? 'Keine Trenddaten verfuegbar' : 'No trend data available'}
      </div>
    )
  }

  const getScoreColor = (score: number) => {
    if (score >= 80) return '#22c55e' // green-500
    if (score >= 60) return '#eab308' // yellow-500
    return '#ef4444' // red-500
  }

  const latestScore = data[data.length - 1]?.score || 0
  const strokeColor = getScoreColor(latestScore)

  const CustomTooltip = ({ active, payload, label }: any) => {
    if (active && payload && payload.length) {
      const score = payload[0].value
      return (
        <div className="bg-white px-3 py-2 rounded-lg shadow-lg border border-slate-200">
          <p className="text-xs text-slate-500">{label}</p>
          <p className="text-lg font-bold" style={{ color: getScoreColor(score) }}>
            {score.toFixed(1)}%
          </p>
        </div>
      )
    }
    return null
  }

  if (showArea) {
    return (
      <ResponsiveContainer width="100%" height={height}>
        <AreaChart data={data} margin={{ top: 5, right: 5, left: -20, bottom: 5 }}>
          <defs>
            <linearGradient id="colorScore" x1="0" y1="0" x2="0" y2="1">
              <stop offset="5%" stopColor={strokeColor} stopOpacity={0.3} />
              <stop offset="95%" stopColor={strokeColor} stopOpacity={0} />
            </linearGradient>
          </defs>
          <CartesianGrid strokeDasharray="3 3" stroke="#e2e8f0" />
          <XAxis
            dataKey="label"
            tick={{ fontSize: 10, fill: '#94a3b8' }}
            axisLine={{ stroke: '#e2e8f0' }}
            tickLine={false}
          />
          <YAxis
            domain={[0, 100]}
            tick={{ fontSize: 10, fill: '#94a3b8' }}
            axisLine={{ stroke: '#e2e8f0' }}
            tickLine={false}
            tickFormatter={(value) => `${value}%`}
          />
          <Tooltip content={<CustomTooltip />} />
          <Area
            type="monotone"
            dataKey="score"
            stroke={strokeColor}
            strokeWidth={2}
            fillOpacity={1}
            fill="url(#colorScore)"
          />
        </AreaChart>
      </ResponsiveContainer>
    )
  }

  return (
    <ResponsiveContainer width="100%" height={height}>
      <LineChart data={data} margin={{ top: 5, right: 5, left: -20, bottom: 5 }}>
        <CartesianGrid strokeDasharray="3 3" stroke="#e2e8f0" />
        <XAxis
          dataKey="label"
          tick={{ fontSize: 10, fill: '#94a3b8' }}
          axisLine={{ stroke: '#e2e8f0' }}
          tickLine={false}
        />
        <YAxis
          domain={[0, 100]}
          tick={{ fontSize: 10, fill: '#94a3b8' }}
          axisLine={{ stroke: '#e2e8f0' }}
          tickLine={false}
          tickFormatter={(value) => `${value}%`}
        />
        <Tooltip content={<CustomTooltip />} />
        <Line
          type="monotone"
          dataKey="score"
          stroke={strokeColor}
          strokeWidth={2}
          dot={{ fill: strokeColor, strokeWidth: 2, r: 3 }}
          activeDot={{ r: 5, stroke: strokeColor, strokeWidth: 2, fill: 'white' }}
        />
      </LineChart>
    </ResponsiveContainer>
  )
}

/**
 * TrafficLightIndicator Component
 *
 * Large circular indicator showing overall compliance status.
 */
interface TrafficLightIndicatorProps {
  status: 'green' | 'yellow' | 'red'
  score: number
  lang?: Language
  size?: 'sm' | 'md' | 'lg'
}

export function TrafficLightIndicator({
  status,
  score,
  lang = 'de',
  size = 'lg'
}: TrafficLightIndicatorProps) {
  const colors = {
    green: { bg: 'bg-green-500', ring: 'ring-green-200', text: 'text-green-700' },
    yellow: { bg: 'bg-yellow-500', ring: 'ring-yellow-200', text: 'text-yellow-700' },
    red: { bg: 'bg-red-500', ring: 'ring-red-200', text: 'text-red-700' },
  }

  const sizes = {
    sm: { container: 'w-16 h-16', text: 'text-lg', label: 'text-xs' },
    md: { container: 'w-24 h-24', text: 'text-2xl', label: 'text-sm' },
    lg: { container: 'w-32 h-32', text: 'text-4xl', label: 'text-base' },
  }

  const labels = {
    green: { de: 'Gut', en: 'Good' },
    yellow: { de: 'Achtung', en: 'Attention' },
    red: { de: 'Kritisch', en: 'Critical' },
  }

  const { bg, ring, text } = colors[status]
  const { container, text: textSize, label: labelSize } = sizes[size]

  return (
    <div className="flex flex-col items-center">
      <div
        className={`
          ${container} rounded-full flex items-center justify-center
          ${bg} ring-4 ${ring} shadow-lg
          transition-all duration-300
        `}
      >
        <span className={`${textSize} font-bold text-white`}>
          {score.toFixed(0)}%
        </span>
      </div>
      <span className={`mt-2 ${labelSize} font-medium ${text}`}>
        {labels[status][lang]}
      </span>
    </div>
  )
}

/**
 * MiniSparkline Component
 *
 * Tiny inline chart for trend indication.
 */
interface MiniSparklineProps {
  data: number[]
  width?: number
  height?: number
}

export function MiniSparkline({ data, width = 60, height = 20 }: MiniSparklineProps) {
  if (!data || data.length < 2) {
    return <span className="text-slate-300">--</span>
  }

  const chartData = data.map((value, index) => ({ value, index }))
  const trend = data[data.length - 1] - data[0]
  const color = trend >= 0 ? '#22c55e' : '#ef4444'

  return (
    <ResponsiveContainer width={width} height={height}>
      <LineChart data={chartData}>
        <Line
          type="monotone"
          dataKey="value"
          stroke={color}
          strokeWidth={1.5}
          dot={false}
        />
      </LineChart>
    </ResponsiveContainer>
  )
}