import { useState } from 'react';
import { useTickers, useAddTicker, useDeleteTicker } from '../../hooks/useTickers';
import { ConfirmDialog } from '../ui/ConfirmDialog';
import { SkeletonTable } from '../ui/Skeleton';
import { formatDateTime } from '../../lib/format';

export function TickerManagement() {
  const { data: tickers, isLoading, isError, error } = useTickers();
  const addTicker = useAddTicker();
  const deleteTicker = useDeleteTicker();
  const [newSymbol, setNewSymbol] = useState('');
  const [deleteTarget, setDeleteTarget] = useState<string | null>(null);

  function handleAdd(e: React.FormEvent) {
    e.preventDefault();
    const symbol = newSymbol.trim().toUpperCase();
    if (!symbol) return;
    addTicker.mutate(symbol, { onSuccess: () => setNewSymbol('') });
  }

  function handleConfirmDelete() {
    if (!deleteTarget) return;
    deleteTicker.mutate(deleteTarget, { onSuccess: () => setDeleteTarget(null) });
  }

  return (
    <div className="space-y-6">
      <form onSubmit={handleAdd} className="flex gap-3">
        <input
          type="text"
          value={newSymbol}
          onChange={(e) => setNewSymbol(e.target.value)}
          placeholder="Enter ticker symbol (e.g. AAPL)"
          className="flex-1 input-glass px-3 py-2.5 text-sm"
        />
        <button
          type="submit"
          disabled={addTicker.isPending || !newSymbol.trim()}
          className="btn-gradient px-4 py-2.5 text-sm disabled:opacity-50 disabled:cursor-not-allowed"
        >
          <span>{addTicker.isPending ? 'Adding…' : 'Add Ticker'}</span>
        </button>
      </form>

      {isLoading && <SkeletonTable rows={5} cols={3} />}
      {isError && <p className="text-sm text-red-400">{(error as Error)?.message || 'Failed to load tickers'}</p>}

      {tickers && tickers.length > 0 && (
        <div className="glass overflow-x-auto">
          <table className="w-full text-sm text-left">
            <thead className="border-b border-white/[0.06] text-gray-500">
              <tr>
                <th className="px-4 py-3 font-medium text-xs uppercase tracking-wider">Symbol</th>
                <th className="px-4 py-3 font-medium text-xs uppercase tracking-wider">Added</th>
                <th className="px-4 py-3 font-medium text-xs uppercase tracking-wider text-right">Actions</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-white/[0.04]">
              {tickers.map((ticker) => (
                <tr key={ticker.id} className="hover:bg-white/[0.03] transition-all duration-150">
                  <td className="px-4 py-3 font-medium text-gray-100">{ticker.symbol}</td>
                  <td className="px-4 py-3 text-gray-400">{formatDateTime(ticker.created_at)}</td>
                  <td className="px-4 py-3 text-right">
                    <button
                      onClick={() => setDeleteTarget(ticker.symbol)}
                      disabled={deleteTicker.isPending}
                      className="rounded-lg border border-red-500/20 bg-red-500/10 px-3 py-1 text-xs text-red-400 hover:bg-red-500/20 disabled:opacity-50 transition-all duration-200"
                    >
                      Delete
                    </button>
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      )}

      {tickers && tickers.length === 0 && (
        <p className="text-sm text-gray-500">No tickers registered yet. Add one above.</p>
      )}

      <ConfirmDialog
        open={deleteTarget !== null}
        title="Delete Ticker"
        message={`Are you sure you want to delete ${deleteTarget}? This action cannot be undone.`}
        onConfirm={handleConfirmDelete}
        onCancel={() => setDeleteTarget(null)}
      />
    </div>
  );
}
