/**
 * GoldenChart 암호화폐 추세검색 (Trend Search)
 */
import React, { useCallback, useEffect, useRef, useState } from 'react';
import BuilderPageShell from './layout/BuilderPageShell';
import TrendSearchFilterPanel from './trendSearch/TrendSearchFilterPanel';
import TrendSearchResultsCardGrid from './trendSearch/TrendSearchResultsCardGrid';
import TrendSearchViewHeaderControls from './trendSearch/TrendSearchViewHeaderControls';
import type { TrendSearchDisplayMode } from './trendSearch/TrendSearchResultCard';
import type { Theme } from '../types';
import type { ChartRealtimeSource } from '../hooks/useChartRealtimeData';
import type { TickerData } from '../hooks/useMarketTicker';
import {
  DEFAULT_TREND_SEARCH_REQUEST,
  scanTrendSearch,
  fetchTrendSearchDetail,
  type TrendSearchRequest,
  type TrendSearchResultDto,
} from '../utils/trendSearchApi';
import '../styles/trendSearchDashboard.css';
import '../styles/virtualTradingDashboard.css';

const REFRESH_MS = 3000;
const DISPLAY_MODE_KEY = 'tsd-display-mode';

function loadDisplayMode(): TrendSearchDisplayMode {
  try {
    const v = localStorage.getItem(DISPLAY_MODE_KEY);
    if (v === 'chart' || v === 'summary') return v;
  } catch { /* ignore */ }
  return 'summary';
}

interface Props {
  theme?: Theme;
  chartRealtimeSource?: ChartRealtimeSource;
  chartSeriesPriceLabels?: boolean;
  tickers?: Map<string, TickerData>;
}

const TrendSearchPage: React.FC<Props> = ({
  theme = 'dark',
  chartRealtimeSource = 'BACKEND_STOMP',
  chartSeriesPriceLabels = true,
  tickers,
}) => {
  const [filters, setFilters] = useState<TrendSearchRequest>(() => ({ ...DEFAULT_TREND_SEARCH_REQUEST }));
  const [results, setResults] = useState<TrendSearchResultDto[]>([]);
  const [selectedMarket, setSelectedMarket] = useState<string | null>(null);
  const [searching, setSearching] = useState(false);
  const [autoRefresh, setAutoRefresh] = useState(true);
  const [displayMode, setDisplayMode] = useState<TrendSearchDisplayMode>(() => loadDisplayMode());
  const [flashMarkets, setFlashMarkets] = useState<Set<string>>(new Set());
  const [lastUpdatedAt, setLastUpdatedAt] = useState<number>(Date.now());
  const filtersRef = useRef(filters);
  filtersRef.current = filters;

  const runSearch = useCallback(async (opts?: { silent?: boolean }) => {
    if (!opts?.silent) setSearching(true);
    try {
      const list = await scanTrendSearch(filtersRef.current);
      setResults(list);
      setLastUpdatedAt(Date.now());
      setSelectedMarket(prev => {
        if (prev && list.some(r => r.market === prev)) return prev;
        return list[0]?.market ?? null;
      });
      if (list.length > 0) {
        setFlashMarkets(new Set(list.slice(0, 5).map(r => r.market)));
        setTimeout(() => setFlashMarkets(new Set()), 600);
      }
    } catch (e) {
      console.warn('[TrendSearch]', e);
      if (!opts?.silent) window.alert('추세검색 스캔에 실패했습니다. 백엔드 연결을 확인하세요.');
    } finally {
      if (!opts?.silent) setSearching(false);
    }
  }, []);

  useEffect(() => { void runSearch(); }, []);

  useEffect(() => {
    if (!autoRefresh) return;
    const id = window.setInterval(() => void runSearch({ silent: true }), REFRESH_MS);
    return () => clearInterval(id);
  }, [autoRefresh, runSearch]);

  useEffect(() => {
    try { localStorage.setItem(DISPLAY_MODE_KEY, displayMode); } catch { /* ignore */ }
  }, [displayMode]);

  const handleSelect = useCallback(async (row: TrendSearchResultDto) => {
    setSelectedMarket(row.market);
    try {
      const detail = await fetchTrendSearchDetail(row.market, filters.timeframe);
      if (detail) {
        setResults(prev => prev.map(r => (r.market === detail.market ? detail : r)));
      }
    } catch { /* keep row */ }
  }, [filters.timeframe]);

  return (
    <BuilderPageShell
      theme={theme}
      title="추세검색"
      subtitle="Golden Analysis · Trend Search"
      pageClassName="bps-page--tsd bps-page--vtd"
      headerActions={(
        <TrendSearchViewHeaderControls
          displayMode={displayMode}
          onDisplayModeChange={setDisplayMode}
          autoRefresh={autoRefresh}
          onAutoRefreshChange={setAutoRefresh}
          searching={searching}
          onRefresh={() => void runSearch()}
          resultCount={results.length}
        />
      )}
      leftStorageKey="tsd-left-width"
      leftDefaultWidth={320}
      leftCollapsedStorageKey="tsd-left-open"
      collapsiblePanels
      left={(
        <TrendSearchFilterPanel
          filters={filters}
          onChange={setFilters}
          onSearch={() => void runSearch()}
          searching={searching}
        />
      )}
      center={(
        <TrendSearchResultsCardGrid
          results={results}
          timeframe={filters.timeframe}
          displayMode={displayMode}
          loading={searching}
          selectedMarket={selectedMarket}
          onSelect={row => void handleSelect(row)}
          flashMarkets={flashMarkets}
          theme={theme}
          chartRealtimeSource={chartRealtimeSource}
          chartSeriesPriceLabels={chartSeriesPriceLabels}
          tickers={tickers}
          lastUpdatedAt={lastUpdatedAt}
        />
      )}
    />
  );
};

export default TrendSearchPage;