'use client';

import { Clock, ArrowUpRight, ArrowDownRight, Minus } from 'lucide-react';
import { useEffect, useRef, useState } from 'react';
import {
  createChart,
  ColorType,
  LineStyle,
  BaselineSeries,
  LineSeries,
} from 'lightweight-charts';

type StockWidgetProps = {
  symbol: string;
  shortName: string;
  longName?: string;
  exchange?: string;
  currency?: string;
  marketState?: string;
  regularMarketPrice?: number;
  regularMarketChange?: number;
  regularMarketChangePercent?: number;
  regularMarketPreviousClose?: number;
  regularMarketOpen?: number;
  regularMarketDayHigh?: number;
  regularMarketDayLow?: number;
  regularMarketVolume?: number;
  averageDailyVolume3Month?: number;
  marketCap?: number;
  fiftyTwoWeekLow?: number;
  fiftyTwoWeekHigh?: number;
  trailingPE?: number;
  forwardPE?: number;
  dividendYield?: number;
  earningsPerShare?: number;
  website?: string;
  postMarketPrice?: number;
  postMarketChange?: number;
  postMarketChangePercent?: number;
  preMarketPrice?: number;
  preMarketChange?: number;
  preMarketChangePercent?: number;
  chartData?: {
    '1D'?: { timestamps: number[]; prices: number[] } | null;
    '5D'?: { timestamps: number[]; prices: number[] } | null;
    '1M'?: { timestamps: number[]; prices: number[] } | null;
    '3M'?: { timestamps: number[]; prices: number[] } | null;
    '6M'?: { timestamps: number[]; prices: number[] } | null;
    '1Y'?: { timestamps: number[]; prices: number[] } | null;
    MAX?: { timestamps: number[]; prices: number[] } | null;
  } | null;
  comparisonData?: Array<{
    ticker: string;
    name: string;
    chartData: {
      '1D'?: { timestamps: number[]; prices: number[] } | null;
      '5D'?: { timestamps: number[]; prices: number[] } | null;
      '1M'?: { timestamps: number[]; prices: number[] } | null;
      '3M'?: { timestamps: number[]; prices: number[] } | null;
      '6M'?: { timestamps: number[]; prices: number[] } | null;
      '1Y'?: { timestamps: number[]; prices: number[] } | null;
      MAX?: { timestamps: number[]; prices: number[] } | null;
    };
  }> | null;
  error?: string;
};

const formatNumber = (num: number | undefined, decimals = 2): string => {
  if (num === undefined || num === null) return 'N/A';
  return num.toLocaleString(undefined, {
    minimumFractionDigits: decimals,
    maximumFractionDigits: decimals,
  });
};

const formatLargeNumber = (num: number | undefined): string => {
  if (num === undefined || num === null) return 'N/A';
  if (num >= 1e12) return `$${(num / 1e12).toFixed(2)}T`;
  if (num >= 1e9) return `$${(num / 1e9).toFixed(2)}B`;
  if (num >= 1e6) return `$${(num / 1e6).toFixed(2)}M`;
  if (num >= 1e3) return `$${(num / 1e3).toFixed(2)}K`;
  return `$${num.toFixed(2)}`;
};

const Stock = (props: StockWidgetProps) => {
  const [isDarkMode, setIsDarkMode] = useState(false);
  const [selectedTimeframe, setSelectedTimeframe] = useState<
    '1D' | '5D' | '1M' | '3M' | '6M' | '1Y' | 'MAX'
  >('1M');
  const chartContainerRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const checkDarkMode = () => {
      setIsDarkMode(document.documentElement.classList.contains('dark'));
    };

    checkDarkMode();

    const observer = new MutationObserver(checkDarkMode);
    observer.observe(document.documentElement, {
      attributes: true,
      attributeFilter: ['class'],
    });

    return () => observer.disconnect();
  }, []);

  useEffect(() => {
    const currentChartData = props.chartData?.[selectedTimeframe];
    if (
      !chartContainerRef.current ||
      !currentChartData ||
      currentChartData.timestamps.length === 0
    ) {
      return;
    }

    const chart = createChart(chartContainerRef.current, {
      width: chartContainerRef.current.clientWidth,
      height: 280,
      layout: {
        background: { type: ColorType.Solid, color: 'transparent' },
        textColor: isDarkMode ? '#6b7280' : '#9ca3af',
        fontSize: 11,
        attributionLogo: false,
      },
      grid: {
        vertLines: {
          color: isDarkMode ? '#21262d' : '#e8edf1',
          style: LineStyle.Solid,
        },
        horzLines: {
          color: isDarkMode ? '#21262d' : '#e8edf1',
          style: LineStyle.Solid,
        },
      },
      crosshair: {
        vertLine: {
          color: isDarkMode ? '#30363d' : '#d0d7de',
          labelVisible: false,
        },
        horzLine: {
          color: isDarkMode ? '#30363d' : '#d0d7de',
          labelVisible: true,
        },
      },
      rightPriceScale: {
        borderVisible: false,
        visible: false,
      },
      leftPriceScale: {
        borderVisible: false,
        visible: true,
      },
      timeScale: {
        borderVisible: false,
        timeVisible: false,
      },
      handleScroll: false,
      handleScale: false,
    });

    const prices = currentChartData.prices;
    let baselinePrice: number;

    if (selectedTimeframe === '1D') {
      baselinePrice = props.regularMarketPreviousClose ?? prices[0];
    } else {
      baselinePrice = prices[0];
    }

    const baselineSeries = chart.addSeries(BaselineSeries);

    baselineSeries.applyOptions({
      baseValue: { type: 'price', price: baselinePrice },
      topLineColor: isDarkMode ? '#14b8a6' : '#0d9488',
      topFillColor1: isDarkMode
        ? 'rgba(20, 184, 166, 0.28)'
        : 'rgba(13, 148, 136, 0.24)',
      topFillColor2: isDarkMode
        ? 'rgba(20, 184, 166, 0.05)'
        : 'rgba(13, 148, 136, 0.05)',
      bottomLineColor: isDarkMode ? '#f87171' : '#dc2626',
      bottomFillColor1: isDarkMode
        ? 'rgba(248, 113, 113, 0.05)'
        : 'rgba(220, 38, 38, 0.05)',
      bottomFillColor2: isDarkMode
        ? 'rgba(248, 113, 113, 0.28)'
        : 'rgba(220, 38, 38, 0.24)',
      lineWidth: 2,
      crosshairMarkerVisible: true,
      crosshairMarkerRadius: 4,
      crosshairMarkerBorderColor: '',
      crosshairMarkerBackgroundColor: '',
    });

    const data = currentChartData.timestamps.map((timestamp, index) => {
      const price = currentChartData.prices[index];
      return {
        time: (timestamp / 1000) as any,
        value: price,
      };
    });

    baselineSeries.setData(data);

    const comparisonColors = ['#8b5cf6', '#f59e0b', '#ec4899'];
    if (props.comparisonData && props.comparisonData.length > 0) {
      props.comparisonData.forEach((comp, index) => {
        const compChartData = comp.chartData[selectedTimeframe];
        if (compChartData && compChartData.prices.length > 0) {
          const compData = compChartData.timestamps.map((timestamp, i) => ({
            time: (timestamp / 1000) as any,
            value: compChartData.prices[i],
          }));

          const compSeries = chart.addSeries(LineSeries);
          compSeries.applyOptions({
            color: comparisonColors[index] || '#6b7280',
            lineWidth: 2,
            crosshairMarkerVisible: true,
            crosshairMarkerRadius: 4,
            priceScaleId: 'left',
          });
          compSeries.setData(compData);
        }
      });
    }

    chart.timeScale().fitContent();

    const handleResize = () => {
      if (chartContainerRef.current) {
        chart.applyOptions({
          width: chartContainerRef.current.clientWidth,
        });
      }
    };

    window.addEventListener('resize', handleResize);

    return () => {
      window.removeEventListener('resize', handleResize);
      chart.remove();
    };
  }, [
    props.chartData,
    props.comparisonData,
    selectedTimeframe,
    isDarkMode,
    props.regularMarketPreviousClose,
  ]);

  const isPositive = (props.regularMarketChange ?? 0) >= 0;
  const isMarketOpen = props.marketState === 'REGULAR';
  const isPreMarket = props.marketState === 'PRE';
  const isPostMarket = props.marketState === 'POST';

  const displayPrice = isPostMarket
    ? props.postMarketPrice ?? props.regularMarketPrice
    : isPreMarket
      ? props.preMarketPrice ?? props.regularMarketPrice
      : props.regularMarketPrice;

  const displayChange = isPostMarket
    ? props.postMarketChange ?? props.regularMarketChange
    : isPreMarket
      ? props.preMarketChange ?? props.regularMarketChange
      : props.regularMarketChange;

  const displayChangePercent = isPostMarket
    ? props.postMarketChangePercent ?? props.regularMarketChangePercent
    : isPreMarket
      ? props.preMarketChangePercent ?? props.regularMarketChangePercent
      : props.regularMarketChangePercent;

  const changeColor = isPositive
    ? 'text-green-600 dark:text-green-400'
    : 'text-red-600 dark:text-red-400';

  if (props.error) {
    return (
      <div className="rounded-lg bg-light-secondary dark:bg-dark-secondary border border-light-200 dark:border-dark-200 p-4">
        <p className="text-sm text-black dark:text-white">
          Error: {props.error}
        </p>
      </div>
    );
  }

  return (
    <div className="rounded-lg border border-light-200 dark:border-dark-200 overflow-hidden">
      <div className="p-4 space-y-4">
        <div className="flex items-start justify-between gap-4 pb-4 border-b border-light-200 dark:border-dark-200">
          <div className="flex-1">
            <div className="flex items-center gap-2 mb-1">
              {props.website && (
                <img
                  src={`https://logo.clearbit.com/${new URL(props.website).hostname}`}
                  alt={`${props.symbol} logo`}
                  className="w-8 h-8 rounded-lg"
                  onError={(e) => {
                    (e.target as HTMLImageElement).style.display = 'none';
                  }}
                />
              )}
              <h3 className="text-2xl font-bold text-black dark:text-white">
                {props.symbol}
              </h3>
              {props.exchange && (
                <span className="px-2 py-0.5 text-xs font-medium rounded bg-light-100 dark:bg-dark-100 text-black/60 dark:text-white/60">
                  {props.exchange}
                </span>
              )}
              {isMarketOpen && (
                <div className="flex items-center gap-1.5 px-2 py-0.5 rounded-full bg-green-100 dark:bg-green-950/40 border border-green-300 dark:border-green-800">
                  <div className="w-1.5 h-1.5 rounded-full bg-green-500 animate-pulse" />
                  <span className="text-xs font-medium text-green-700 dark:text-green-400">
                    Live
                  </span>
                </div>
              )}
              {isPreMarket && (
                <div className="flex items-center gap-1.5 px-2 py-0.5 rounded-full bg-blue-100 dark:bg-blue-950/40 border border-blue-300 dark:border-blue-800">
                  <Clock className="w-3 h-3 text-blue-600 dark:text-blue-400" />
                  <span className="text-xs font-medium text-blue-700 dark:text-blue-400">
                    Pre-Market
                  </span>
                </div>
              )}
              {isPostMarket && (
                <div className="flex items-center gap-1.5 px-2 py-0.5 rounded-full bg-orange-100 dark:bg-orange-950/40 border border-orange-300 dark:border-orange-800">
                  <Clock className="w-3 h-3 text-orange-600 dark:text-orange-400" />
                  <span className="text-xs font-medium text-orange-700 dark:text-orange-400">
                    After Hours
                  </span>
                </div>
              )}
            </div>
            <p className="text-sm text-black/60 dark:text-white/60">
              {props.longName || props.shortName}
            </p>
          </div>

          <div className="text-right">
            <div className="flex items-baseline gap-2 mb-1">
              <span className="text-3xl font-medium text-black dark:text-white">
                {props.currency === 'USD' ? '$' : ''}
                {formatNumber(displayPrice)}
              </span>
            </div>
            <div
              className={`flex items-center justify-end gap-1 ${changeColor}`}
            >
              {isPositive ? (
                <ArrowUpRight className="w-4 h-4" />
              ) : displayChange === 0 ? (
                <Minus className="w-4 h-4" />
              ) : (
                <ArrowDownRight className="w-4 h-4" />
              )}
              <span className="text-lg font-normal">
                {displayChange !== undefined && displayChange >= 0 ? '+' : ''}
                {formatNumber(displayChange)}
              </span>
              <span className="text-sm font-normal">
                (
                {displayChangePercent !== undefined && displayChangePercent >= 0
                  ? '+'
                  : ''}
                {formatNumber(displayChangePercent)}%)
              </span>
            </div>
          </div>
        </div>

        {props.chartData && (
          <div className="bg-light-secondary dark:bg-dark-secondary rounded-lg overflow-hidden">
            <div className="flex items-center justify-between p-3 border-b border-light-200 dark:border-dark-200">
              <div className="flex items-center gap-1">
                {(['1D', '5D', '1M', '3M', '6M', '1Y', 'MAX'] as const).map(
                  (timeframe) => (
                    <button
                      key={timeframe}
                      onClick={() => setSelectedTimeframe(timeframe)}
                      disabled={!props.chartData?.[timeframe]}
                      className={`px-3 py-1.5 text-xs font-medium rounded transition-colors ${
                        selectedTimeframe === timeframe
                          ? 'bg-black/10 dark:bg-white/10 text-black dark:text-white'
                          : 'text-black/50 dark:text-white/50 hover:text-black/80 dark:hover:text-white/80'
                      } disabled:opacity-30 disabled:cursor-not-allowed`}
                    >
                      {timeframe}
                    </button>
                  ),
                )}
              </div>

              {props.comparisonData && props.comparisonData.length > 0 && (
                <div className="flex items-center gap-3 ml-auto">
                  <span className="text-xs text-black/50 dark:text-white/50">
                    {props.symbol}
                  </span>
                  {props.comparisonData.map((comp, index) => {
                    const colors = ['#8b5cf6', '#f59e0b', '#ec4899'];
                    return (
                      <div
                        key={comp.ticker}
                        className="flex items-center gap-1.5"
                      >
                        <div
                          className="w-2 h-2 rounded-full"
                          style={{ backgroundColor: colors[index] }}
                        />
                        <span className="text-xs text-black/70 dark:text-white/70">
                          {comp.ticker}
                        </span>
                      </div>
                    );
                  })}
                </div>
              )}
            </div>

            <div className="p-4">
              <div ref={chartContainerRef} />
            </div>

            <div className="grid grid-cols-3 border-t border-light-200 dark:border-dark-200">
              <div className="flex justify-between p-3 border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Prev Close
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  ${formatNumber(props.regularMarketPreviousClose)}
                </span>
              </div>
              <div className="flex justify-between p-3 border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  52W Range
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  ${formatNumber(props.fiftyTwoWeekLow, 2)}-$
                  {formatNumber(props.fiftyTwoWeekHigh, 2)}
                </span>
              </div>
              <div className="flex justify-between p-3">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Market Cap
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  {formatLargeNumber(props.marketCap)}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Open
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  ${formatNumber(props.regularMarketOpen)}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  P/E Ratio
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  {props.trailingPE ? formatNumber(props.trailingPE, 2) : 'N/A'}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Dividend Yield
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  {props.dividendYield
                    ? `${formatNumber(props.dividendYield * 100, 2)}%`
                    : 'N/A'}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Day Range
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  ${formatNumber(props.regularMarketDayLow, 2)}-$
                  {formatNumber(props.regularMarketDayHigh, 2)}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-r border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  Volume
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  {formatLargeNumber(props.regularMarketVolume)}
                </span>
              </div>
              <div className="flex justify-between p-3 border-t border-light-200 dark:border-dark-200">
                <span className="text-xs text-black/50 dark:text-white/50">
                  EPS
                </span>
                <span className="text-xs text-black dark:text-white font-medium">
                  $
                  {props.earningsPerShare
                    ? formatNumber(props.earningsPerShare, 2)
                    : 'N/A'}
                </span>
              </div>
            </div>
          </div>
        )}
      </div>
    </div>
  );
};

export default Stock;