'use client';

import { useQueryClient } from '@tanstack/react-query';
import Link from 'next/link';
import { Suspense, useCallback, useEffect, useMemo, useState } from 'react';
import { format } from 'date-fns';
import { useSearchParams } from 'next/navigation';
import {
  Area,
  AreaChart,
  Bar,
  BarChart,
  CartesianGrid,
  Line,
  ResponsiveContainer,
  Tooltip,
  XAxis,
  YAxis
} from 'recharts';
import { ChartNoAxesCombined, ChevronDown, RefreshCcw, Search } from 'lucide-react';
import { AppShell } from '@/components/shell/app-shell';
import { MetricCard } from '@/components/dashboard/metric-card';
import {
  FinancialControlBar,
  type FinancialControlAction,
  type FinancialControlSection
} from '@/components/financials/control-bar';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Panel } from '@/components/ui/panel';
import { useAuthGuard } from '@/hooks/use-auth-guard';
import { useLinkPrefetch } from '@/hooks/use-link-prefetch';
import {
  formatCurrencyByScale,
  formatPercent,
  type NumberScaleUnit
} from '@/lib/format';
import { companyFinancialStatementsQueryOptions } from '@/lib/query/options';
import type {
  CompanyFinancialStatementsResponse,
  DimensionBreakdownRow,
  FilingFaithfulStatementRow,
  FinancialHistoryWindow,
  FinancialStatementKind,
  FinancialStatementMode,
  StandardizedStatementRow
} from '@/lib/types';

type LoadOptions = {
  cursor?: string | null;
  append?: boolean;
};

const FINANCIAL_VALUE_SCALE_OPTIONS: Array<{ value: NumberScaleUnit; label: string }> = [
  { value: 'thousands', label: 'Thousands (K)' },
  { value: 'millions', label: 'Millions (M)' },
  { value: 'billions', label: 'Billions (B)' }
];

const MODE_OPTIONS: Array<{ value: FinancialStatementMode; label: string }> = [
  { value: 'standardized', label: 'Standardized' },
  { value: 'filing_faithful', label: 'Filing-faithful' }
];

const STATEMENT_OPTIONS: Array<{ value: FinancialStatementKind; label: string }> = [
  { value: 'income', label: 'Income' },
  { value: 'balance', label: 'Balance Sheet' },
  { value: 'cash_flow', label: 'Cash Flow' },
  { value: 'equity', label: 'Equity' },
  { value: 'comprehensive_income', label: 'Comprehensive Income' }
];

const WINDOW_OPTIONS: Array<{ value: FinancialHistoryWindow; label: string }> = [
  { value: '10y', label: '10 Years' },
  { value: 'all', label: 'Full Available' }
];

const CHART_MUTED = '#b4ced9';
const CHART_GRID = 'rgba(126, 217, 255, 0.24)';
const CHART_TOOLTIP_BG = 'rgba(6, 17, 24, 0.95)';
const CHART_TOOLTIP_BORDER = 'rgba(123, 255, 217, 0.45)';

type OverviewPoint = {
  periodId: string;
  filingDate: string;
  label: string;
  revenue: number | null;
  netIncome: number | null;
  totalAssets: number | null;
  cash: number | null;
  debt: number | null;
};

function formatLongDate(value: string) {
  const parsed = new Date(value);
  if (Number.isNaN(parsed.getTime())) {
    return 'Unknown';
  }

  return format(parsed, 'MMM dd, yyyy');
}

function formatShortDate(value: string) {
  const parsed = new Date(value);
  if (Number.isNaN(parsed.getTime())) {
    return 'Unknown';
  }

  return format(parsed, 'MMM yyyy');
}

function asDisplayCurrency(value: number | null, scale: NumberScaleUnit) {
  return value === null ? 'n/a' : formatCurrencyByScale(value, scale);
}

function asAxisCurrencyTick(value: number, scale: NumberScaleUnit) {
  return formatCurrencyByScale(value, scale, { maximumFractionDigits: 1 });
}

function asTooltipCurrency(value: unknown, scale: NumberScaleUnit) {
  const numeric = Number(value);
  if (!Number.isFinite(numeric)) {
    return 'n/a';
  }

  return formatCurrencyByScale(numeric, scale);
}

function ratioPercent(numerator: number | null, denominator: number | null) {
  if (numerator === null || denominator === null || denominator === 0) {
    return null;
  }

  return (numerator / denominator) * 100;
}

function toStandardizedRows(data: CompanyFinancialStatementsResponse | null) {
  if (!data || data.mode !== 'standardized') {
    return [];
  }

  return data.rows as StandardizedStatementRow[];
}

function toFilingFaithfulRows(data: CompanyFinancialStatementsResponse | null) {
  if (!data || data.mode !== 'filing_faithful') {
    return [];
  }

  return data.rows as FilingFaithfulStatementRow[];
}

function rowValue(row: { values: Record<string, number | null> }, periodId: string) {
  return periodId in row.values ? row.values[periodId] : null;
}

function mergeFinancialPages(
  base: CompanyFinancialStatementsResponse | null,
  next: CompanyFinancialStatementsResponse
) {
  if (!base) {
    return next;
  }

  const periods = [...base.periods, ...next.periods]
    .filter((period, index, list) => list.findIndex((item) => item.id === period.id) === index)
    .sort((a, b) => Date.parse(a.filingDate) - Date.parse(b.filingDate));

  const rowMap = new Map<string, StandardizedStatementRow | FilingFaithfulStatementRow>();

  for (const row of [...base.rows, ...next.rows]) {
    const existing = rowMap.get(row.key);
    if (!existing) {
      rowMap.set(row.key, {
        ...row,
        values: { ...row.values }
      });
      continue;
    }

    existing.hasDimensions = existing.hasDimensions || row.hasDimensions;
    for (const [periodId, value] of Object.entries(row.values)) {
      if (!(periodId in existing.values)) {
        existing.values[periodId] = value;
      }
    }

    if ('sourceConcepts' in existing && 'sourceConcepts' in row) {
      for (const concept of row.sourceConcepts) {
        if (!existing.sourceConcepts.includes(concept)) {
          existing.sourceConcepts.push(concept);
        }
      }
    }
  }

  const dimensionBreakdown = (() => {
    if (!base.dimensionBreakdown && !next.dimensionBreakdown) {
      return null;
    }

    const map = new Map<string, DimensionBreakdownRow[]>();
    for (const source of [base.dimensionBreakdown, next.dimensionBreakdown]) {
      if (!source) {
        continue;
      }

      for (const [key, rows] of Object.entries(source)) {
        const existing = map.get(key);
        if (existing) {
          existing.push(...rows);
        } else {
          map.set(key, [...rows]);
        }
      }
    }

    return Object.fromEntries(map.entries());
  })();

  const mergedRows = [...rowMap.values()];

  return {
    ...next,
    periods,
    rows: next.mode === 'standardized'
      ? mergedRows as StandardizedStatementRow[]
      : mergedRows as FilingFaithfulStatementRow[],
    nextCursor: next.nextCursor,
    coverage: {
      filings: periods.length,
      rows: rowMap.size,
      dimensions: dimensionBreakdown
        ? Object.values(dimensionBreakdown).reduce((total, rows) => total + rows.length, 0)
        : 0
    },
    dataSourceStatus: {
      ...next.dataSourceStatus,
      queuedSync: base.dataSourceStatus.queuedSync || next.dataSourceStatus.queuedSync
    },
    dimensionBreakdown
  };
}

function findStandardizedRowValue(
  data: CompanyFinancialStatementsResponse | null,
  preferredKey: string,
  fallbackIncludes: string[]
) {
  const rows = toStandardizedRows(data);
  const exact = rows.find((row) => row.key === preferredKey);
  if (exact) {
    return exact;
  }

  return rows.find((row) => {
    const haystack = `${row.key} ${row.label} ${row.concept}`.toLowerCase();
    return fallbackIncludes.some((needle) => haystack.includes(needle));
  }) ?? null;
}

function buildOverviewSeries(
  incomeData: CompanyFinancialStatementsResponse | null,
  balanceData: CompanyFinancialStatementsResponse | null
): OverviewPoint[] {
  const periodMap = new Map<string, { filingDate: string }>();

  for (const source of [incomeData, balanceData]) {
    for (const period of source?.periods ?? []) {
      periodMap.set(period.id, { filingDate: period.filingDate });
    }
  }

  const periods = [...periodMap.entries()]
    .map(([periodId, data]) => ({ periodId, filingDate: data.filingDate }))
    .sort((a, b) => Date.parse(a.filingDate) - Date.parse(b.filingDate));

  const revenueRow = findStandardizedRowValue(incomeData, 'revenue', ['revenue', 'sales']);
  const netIncomeRow = findStandardizedRowValue(incomeData, 'net-income', ['net income', 'profit']);
  const assetsRow = findStandardizedRowValue(balanceData, 'total-assets', ['total assets']);
  const cashRow = findStandardizedRowValue(balanceData, 'cash-and-equivalents', ['cash']);
  const debtRow = findStandardizedRowValue(balanceData, 'total-debt', ['debt', 'borrowings']);

  return periods.map((period) => ({
    periodId: period.periodId,
    filingDate: period.filingDate,
    label: formatShortDate(period.filingDate),
    revenue: revenueRow ? rowValue(revenueRow, period.periodId) : null,
    netIncome: netIncomeRow ? rowValue(netIncomeRow, period.periodId) : null,
    totalAssets: assetsRow ? rowValue(assetsRow, period.periodId) : null,
    cash: cashRow ? rowValue(cashRow, period.periodId) : null,
    debt: debtRow ? rowValue(debtRow, period.periodId) : null
  }));
}

export default function FinancialsPage() {
  return (
    <Suspense fallback={<div className="flex min-h-screen items-center justify-center text-sm text-[color:var(--terminal-muted)]">Loading financial terminal...</div>}>
      <FinancialsPageContent />
    </Suspense>
  );
}

function FinancialsPageContent() {
  const { isPending, isAuthenticated } = useAuthGuard();
  const searchParams = useSearchParams();
  const queryClient = useQueryClient();
  const { prefetchResearchTicker } = useLinkPrefetch();

  const [tickerInput, setTickerInput] = useState('MSFT');
  const [ticker, setTicker] = useState('MSFT');
  const [mode, setMode] = useState<FinancialStatementMode>('standardized');
  const [statement, setStatement] = useState<FinancialStatementKind>('income');
  const [window, setWindow] = useState<FinancialHistoryWindow>('10y');
  const [valueScale, setValueScale] = useState<NumberScaleUnit>('millions');
  const [financials, setFinancials] = useState<CompanyFinancialStatementsResponse | null>(null);
  const [overviewIncome, setOverviewIncome] = useState<CompanyFinancialStatementsResponse | null>(null);
  const [overviewBalance, setOverviewBalance] = useState<CompanyFinancialStatementsResponse | null>(null);
  const [selectedRowKey, setSelectedRowKey] = useState<string | null>(null);
  const [dimensionsEnabled, setDimensionsEnabled] = useState(false);
  const [loading, setLoading] = useState(true);
  const [loadingMore, setLoadingMore] = useState(false);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const fromQuery = searchParams.get('ticker');
    if (!fromQuery) {
      return;
    }

    const normalized = fromQuery.trim().toUpperCase();
    if (!normalized) {
      return;
    }

    setTickerInput(normalized);
    setTicker(normalized);
  }, [searchParams]);

  const loadOverview = useCallback(async (symbol: string, selectedWindow: FinancialHistoryWindow) => {
    const [incomeResponse, balanceResponse] = await Promise.all([
      queryClient.ensureQueryData(companyFinancialStatementsQueryOptions({
        ticker: symbol,
        mode: 'standardized',
        statement: 'income',
        window: selectedWindow,
        includeDimensions: false,
        limit: selectedWindow === 'all' ? 120 : 80
      })),
      queryClient.ensureQueryData(companyFinancialStatementsQueryOptions({
        ticker: symbol,
        mode: 'standardized',
        statement: 'balance',
        window: selectedWindow,
        includeDimensions: false,
        limit: selectedWindow === 'all' ? 120 : 80
      }))
    ]);

    setOverviewIncome(incomeResponse.financials);
    setOverviewBalance(balanceResponse.financials);
  }, [queryClient]);

  const loadFinancials = useCallback(async (symbol: string, options?: LoadOptions) => {
    const normalizedTicker = symbol.trim().toUpperCase();
    const nextCursor = options?.cursor ?? null;
    const includeDimensions = dimensionsEnabled || selectedRowKey !== null;

    if (!options?.append) {
      setLoading(true);
    } else {
      setLoadingMore(true);
    }

    setError(null);

    try {
      const response = await queryClient.ensureQueryData(companyFinancialStatementsQueryOptions({
        ticker: normalizedTicker,
        mode,
        statement,
        window,
        includeDimensions,
        cursor: nextCursor,
        limit: window === 'all' ? 60 : 80
      }));

      setFinancials((current) => {
        if (options?.append) {
          return mergeFinancialPages(current, response.financials);
        }

        return response.financials;
      });

      await loadOverview(normalizedTicker, window);
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Unable to load financial history');
      if (!options?.append) {
        setFinancials(null);
      }
    } finally {
      setLoading(false);
      setLoadingMore(false);
    }
  }, [
    queryClient,
    mode,
    statement,
    window,
    dimensionsEnabled,
    selectedRowKey,
    loadOverview
  ]);

  useEffect(() => {
    if (!isPending && isAuthenticated) {
      void loadFinancials(ticker);
    }
  }, [isPending, isAuthenticated, ticker, mode, statement, window, dimensionsEnabled, loadFinancials]);

  const periods = useMemo(() => {
    return [...(financials?.periods ?? [])]
      .sort((a, b) => Date.parse(a.filingDate) - Date.parse(b.filingDate));
  }, [financials?.periods]);

  const standardizedRows = useMemo(() => toStandardizedRows(financials), [financials]);
  const filingFaithfulRows = useMemo(() => toFilingFaithfulRows(financials), [financials]);

  const statementRows = mode === 'standardized'
    ? standardizedRows
    : filingFaithfulRows;

  const overviewSeries = useMemo(() => {
    return buildOverviewSeries(overviewIncome, overviewBalance);
  }, [overviewIncome, overviewBalance]);

  const latestOverview = overviewSeries[overviewSeries.length - 1] ?? null;

  const selectedRow = useMemo(() => {
    if (!selectedRowKey) {
      return null;
    }

    return statementRows.find((row) => row.key === selectedRowKey) ?? null;
  }, [selectedRowKey, statementRows]);

  const dimensionRows = useMemo(() => {
    if (!selectedRow || !financials?.dimensionBreakdown) {
      return [];
    }

    const direct = financials.dimensionBreakdown[selectedRow.key] ?? [];
    if (direct.length > 0) {
      return direct;
    }

    if ('concept' in selectedRow && selectedRow.concept) {
      const conceptKey = selectedRow.concept.toLowerCase();
      for (const rows of Object.values(financials.dimensionBreakdown)) {
        const matched = rows.filter((row) => (row.concept ?? '').toLowerCase() === conceptKey);
        if (matched.length > 0) {
          return matched;
        }
      }
    }

    return [];
  }, [selectedRow, financials?.dimensionBreakdown]);

  const selectedScaleLabel = useMemo(() => {
    return FINANCIAL_VALUE_SCALE_OPTIONS.find((option) => option.value === valueScale)?.label ?? 'Millions (M)';
  }, [valueScale]);

  const controlSections = useMemo<FinancialControlSection[]>(() => [
    {
      id: 'mode',
      label: 'Mode',
      value: mode,
      options: MODE_OPTIONS,
      onChange: (nextValue) => {
        setMode(nextValue as FinancialStatementMode);
        setSelectedRowKey(null);
      }
    },
    {
      id: 'statement',
      label: 'Statement',
      value: statement,
      options: STATEMENT_OPTIONS,
      onChange: (nextValue) => {
        setStatement(nextValue as FinancialStatementKind);
        setSelectedRowKey(null);
      }
    },
    {
      id: 'history',
      label: 'Window',
      value: window,
      options: WINDOW_OPTIONS,
      onChange: (nextValue) => {
        setWindow(nextValue as FinancialHistoryWindow);
        setSelectedRowKey(null);
      }
    },
    {
      id: 'scale',
      label: 'Scale',
      value: valueScale,
      options: FINANCIAL_VALUE_SCALE_OPTIONS,
      onChange: (nextValue) => setValueScale(nextValue as NumberScaleUnit)
    }
  ], [mode, statement, window, valueScale]);

  const controlActions = useMemo<FinancialControlAction[]>(() => {
    const actions: FinancialControlAction[] = [];

    if (window === '10y') {
      actions.push({
        id: 'load-full-history',
        label: 'Load Full History',
        variant: 'secondary',
        onClick: () => {
          setWindow('all');
          setSelectedRowKey(null);
        }
      });
    }

    if (window === 'all' && financials?.nextCursor) {
      actions.push({
        id: 'load-older-periods',
        label: loadingMore ? 'Loading Older...' : 'Load Older Periods',
        variant: 'secondary',
        disabled: loadingMore,
        onClick: () => {
          if (!financials.nextCursor) {
            return;
          }

          void loadFinancials(ticker, {
            cursor: financials.nextCursor,
            append: true
          });
        }
      });
    }

    return actions;
  }, [window, financials?.nextCursor, loadingMore, loadFinancials, ticker]);

  if (isPending || !isAuthenticated) {
    return <div className="flex min-h-screen items-center justify-center text-sm text-[color:var(--terminal-muted)]">Loading financial terminal...</div>;
  }

  return (
    <AppShell
      title="Financials"
      subtitle="Dual-mode financial statements with standardized comparability and filing-faithful presentation."
      activeTicker={financials?.company.ticker ?? ticker}
      actions={(
        <Button
          variant="secondary"
          onClick={() => {
            void loadFinancials(ticker);
          }}
        >
          <RefreshCcw className="size-4" />
          Refresh
        </Button>
      )}
    >
      <Panel title="Company Selector" subtitle="Load statement history by ticker. Default window is 10 years; full history is on demand.">
        <form
          className="flex flex-wrap items-center gap-3"
          onSubmit={(event) => {
            event.preventDefault();
            const normalized = tickerInput.trim().toUpperCase();
            if (!normalized) {
              return;
            }
            setTicker(normalized);
          }}
        >
          <Input
            value={tickerInput}
            onChange={(event) => setTickerInput(event.target.value.toUpperCase())}
            placeholder="Ticker (AAPL)"
            className="max-w-xs"
          />
          <Button type="submit">
            <Search className="size-4" />
            Load Financials
          </Button>
          {financials ? (
            <Link
              href={`/analysis?ticker=${financials.company.ticker}`}
              onMouseEnter={() => prefetchResearchTicker(financials.company.ticker)}
              onFocus={() => prefetchResearchTicker(financials.company.ticker)}
              className="text-sm text-[color:var(--accent)] hover:text-[color:var(--accent-strong)]"
            >
              Open analysis
            </Link>
          ) : null}
        </form>
      </Panel>

      {error ? (
        <Panel>
          <p className="text-sm text-[#ffb5b5]">{error}</p>
        </Panel>
      ) : null}

      <div className="grid grid-cols-1 gap-4 md:grid-cols-2 xl:grid-cols-4">
        <MetricCard
          label="Latest Revenue"
          value={latestOverview ? asDisplayCurrency(latestOverview.revenue, valueScale) : 'n/a'}
          delta={latestOverview ? formatLongDate(latestOverview.filingDate) : 'No standardized history'}
        />
        <MetricCard
          label="Latest Net Income"
          value={latestOverview ? asDisplayCurrency(latestOverview.netIncome, valueScale) : 'n/a'}
          delta={latestOverview ? `Net margin ${formatPercent(ratioPercent(latestOverview.netIncome, latestOverview.revenue) ?? 0)}` : 'No standardized history'}
          positive={(latestOverview?.netIncome ?? 0) >= 0}
        />
        <MetricCard
          label="Latest Total Assets"
          value={latestOverview ? asDisplayCurrency(latestOverview.totalAssets, valueScale) : 'n/a'}
          delta={latestOverview ? `Debt ${asDisplayCurrency(latestOverview.debt, valueScale)}` : 'No standardized history'}
        />
        <MetricCard
          label="Cash / Debt"
          value={latestOverview && latestOverview.cash !== null && latestOverview.debt !== null && latestOverview.debt !== 0
            ? `${(latestOverview.cash / latestOverview.debt).toFixed(2)}x`
            : 'n/a'}
          delta={latestOverview ? `Cash ${asDisplayCurrency(latestOverview.cash, valueScale)}` : 'No standardized history'}
        />
      </div>

      <FinancialControlBar
        title="Financial Controls"
        subtitle={`Compact multi-filter control bar. Current display scale: ${selectedScaleLabel}.`}
        sections={controlSections}
        actions={controlActions}
      />

      <div className="grid grid-cols-1 gap-6 xl:grid-cols-2">
        <Panel title="Standardized Income Trend" subtitle="Overview chart remains anchored to standardized rows.">
          {loading ? (
            <p className="text-sm text-[color:var(--terminal-muted)]">Loading overview chart...</p>
          ) : overviewSeries.length === 0 ? (
            <p className="text-sm text-[color:var(--terminal-muted)]">No standardized income history available yet.</p>
          ) : (
            <div className="h-[320px]">
              <ResponsiveContainer width="100%" height="100%">
                <BarChart data={overviewSeries}>
                  <CartesianGrid strokeDasharray="2 2" stroke={CHART_GRID} />
                  <XAxis dataKey="label" stroke={CHART_MUTED} fontSize={12} minTickGap={20} />
                  <YAxis
                    stroke={CHART_MUTED}
                    fontSize={12}
                    tickFormatter={(value: number) => asAxisCurrencyTick(value, valueScale)}
                  />
                  <Tooltip
                    formatter={(value) => asTooltipCurrency(value, valueScale)}
                    contentStyle={{
                      backgroundColor: CHART_TOOLTIP_BG,
                      border: `1px solid ${CHART_TOOLTIP_BORDER}`,
                      borderRadius: '0.75rem'
                    }}
                  />
                  <Bar dataKey="revenue" name="Revenue" fill="#68ffd5" radius={[4, 4, 0, 0]} />
                  <Bar dataKey="netIncome" name="Net Income" fill="#5fd3ff" radius={[4, 4, 0, 0]} />
                </BarChart>
              </ResponsiveContainer>
            </div>
          )}
        </Panel>

        <Panel title="Standardized Balance Trend" subtitle="Assets, cash, and debt from standardized balance rows.">
          {loading ? (
            <p className="text-sm text-[color:var(--terminal-muted)]">Loading balance chart...</p>
          ) : overviewSeries.length === 0 ? (
            <p className="text-sm text-[color:var(--terminal-muted)]">No standardized balance history available yet.</p>
          ) : (
            <div className="h-[320px]">
              <ResponsiveContainer width="100%" height="100%">
                <AreaChart data={overviewSeries}>
                  <CartesianGrid strokeDasharray="2 2" stroke={CHART_GRID} />
                  <XAxis dataKey="label" stroke={CHART_MUTED} fontSize={12} minTickGap={20} />
                  <YAxis
                    stroke={CHART_MUTED}
                    fontSize={12}
                    tickFormatter={(value: number) => asAxisCurrencyTick(value, valueScale)}
                  />
                  <Tooltip
                    formatter={(value) => asTooltipCurrency(value, valueScale)}
                    contentStyle={{
                      backgroundColor: CHART_TOOLTIP_BG,
                      border: `1px solid ${CHART_TOOLTIP_BORDER}`,
                      borderRadius: '0.75rem'
                    }}
                  />
                  <Area type="monotone" dataKey="totalAssets" name="Total Assets" stroke="#68ffd5" fill="rgba(104,255,213,0.18)" strokeWidth={2} />
                  <Line type="monotone" dataKey="cash" name="Cash" stroke="#8bd3ff" strokeWidth={2} dot={false} />
                  <Line type="monotone" dataKey="debt" name="Debt" stroke="#ffd08a" strokeWidth={2} dot={false} />
                </AreaChart>
              </ResponsiveContainer>
            </div>
          )}
        </Panel>
      </div>

      <Panel
        title="Statement Matrix"
        subtitle={`${mode === 'standardized' ? 'Cross-company comparable' : 'Filing-native'} ${statement.replace('_', ' ')} rows by period. Click rows with available dimensions for drill-down.`}
      >
        {loading ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">Loading statement matrix...</p>
        ) : periods.length === 0 || statementRows.length === 0 ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">No statement rows available for the selected filters yet.</p>
        ) : (
          <div className="overflow-x-auto">
            <table className="data-table min-w-[980px]">
              <thead>
                <tr>
                  <th className="sticky left-0 z-10 bg-[color:var(--panel)]">Metric</th>
                  {periods.map((period) => (
                    <th key={period.id}>
                      <div className="flex flex-col gap-1">
                        <span>{formatLongDate(period.filingDate)}</span>
                        <span className="text-[11px] normal-case tracking-normal text-[color:var(--terminal-muted)]">{period.filingType} · {period.periodLabel}</span>
                      </div>
                    </th>
                  ))}
                </tr>
              </thead>
              <tbody>
                {statementRows.map((row) => (
                  <tr
                    key={row.key}
                    className={selectedRowKey === row.key ? 'bg-[color:var(--panel-soft)]' : undefined}
                    onClick={() => {
                      setSelectedRowKey(row.key);
                      if (row.hasDimensions && !dimensionsEnabled) {
                        setDimensionsEnabled(true);
                      }
                    }}
                  >
                    <td className="sticky left-0 z-10 bg-[color:var(--panel)]">
                      {'depth' in row ? (
                        <div className="flex items-center gap-2">
                          <span style={{ paddingLeft: `${Math.min(row.depth, 10) * 12}px` }}>{row.label}</span>
                          {row.hasDimensions ? <ChevronDown className="size-3 text-[color:var(--accent)]" /> : null}
                        </div>
                      ) : (
                        <div className="flex items-center gap-2">
                          <span>{row.label}</span>
                          {row.hasDimensions ? <ChevronDown className="size-3 text-[color:var(--accent)]" /> : null}
                        </div>
                      )}
                    </td>
                    {periods.map((period) => (
                      <td key={`${row.key}-${period.id}`}>
                        {asDisplayCurrency(rowValue(row, period.id), valueScale)}
                      </td>
                    ))}
                  </tr>
                ))}
              </tbody>
            </table>
          </div>
        )}

      </Panel>

      <Panel title="Dimension Drill-down" subtitle="Segment/geography/product axes are shown only for the selected row when available.">
        {!selectedRow ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">Select a statement row to inspect dimensional facts.</p>
        ) : !selectedRow.hasDimensions ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">No dimensional data is available for {selectedRow.label}.</p>
        ) : !dimensionsEnabled ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">Enable dimensions by selecting the row again.</p>
        ) : dimensionRows.length === 0 ? (
          <p className="text-sm text-[color:var(--terminal-muted)]">Dimensions are still loading or unavailable for this row.</p>
        ) : (
          <div className="overflow-x-auto">
            <table className="data-table min-w-[760px]">
              <thead>
                <tr>
                  <th>Period</th>
                  <th>Axis</th>
                  <th>Member</th>
                  <th>Value</th>
                </tr>
              </thead>
              <tbody>
                {dimensionRows.map((row, index) => {
                  const period = periods.find((item) => item.id === row.periodId);
                  return (
                    <tr key={`${row.rowKey}-${row.periodId}-${row.axis}-${row.member}-${index}`}>
                      <td>{period ? formatLongDate(period.filingDate) : row.periodId}</td>
                      <td>{row.axis}</td>
                      <td>{row.member}</td>
                      <td>{asDisplayCurrency(row.value, valueScale)}</td>
                    </tr>
                  );
                })}
              </tbody>
            </table>
          </div>
        )}
      </Panel>

      {financials ? (
        <Panel title="Data Source Status" subtitle="Hydration and parsing status for filing statement snapshots.">
          <div className="grid grid-cols-1 gap-3 md:grid-cols-2 xl:grid-cols-5">
            <div className="rounded-lg border border-[color:var(--line-weak)] bg-[color:var(--panel-soft)] px-3 py-2 text-sm">
              <p className="text-[color:var(--terminal-muted)]">Hydrated</p>
              <p className="font-semibold text-[color:var(--terminal-bright)]">{financials.dataSourceStatus.hydratedFilings}</p>
            </div>
            <div className="rounded-lg border border-[color:var(--line-weak)] bg-[color:var(--panel-soft)] px-3 py-2 text-sm">
              <p className="text-[color:var(--terminal-muted)]">Partial</p>
              <p className="font-semibold text-[color:var(--terminal-bright)]">{financials.dataSourceStatus.partialFilings}</p>
            </div>
            <div className="rounded-lg border border-[color:var(--line-weak)] bg-[color:var(--panel-soft)] px-3 py-2 text-sm">
              <p className="text-[color:var(--terminal-muted)]">Failed</p>
              <p className="font-semibold text-[color:var(--terminal-bright)]">{financials.dataSourceStatus.failedFilings}</p>
            </div>
            <div className="rounded-lg border border-[color:var(--line-weak)] bg-[color:var(--panel-soft)] px-3 py-2 text-sm">
              <p className="text-[color:var(--terminal-muted)]">Pending</p>
              <p className="font-semibold text-[color:var(--terminal-bright)]">{financials.dataSourceStatus.pendingFilings}</p>
            </div>
            <div className="rounded-lg border border-[color:var(--line-weak)] bg-[color:var(--panel-soft)] px-3 py-2 text-sm">
              <p className="text-[color:var(--terminal-muted)]">Background Sync</p>
              <p className="font-semibold text-[color:var(--terminal-bright)]">{financials.dataSourceStatus.queuedSync ? 'Queued' : 'Idle'}</p>
            </div>
          </div>
        </Panel>
      ) : null}

      <Panel>
        <div className="flex items-center gap-2 text-xs uppercase tracking-[0.24em] text-[color:var(--terminal-muted)]">
          <ChartNoAxesCombined className="size-4" />
          Financial Statements V2: standardized + filing-faithful history
        </div>
      </Panel>
    </AppShell>
  );
}
