import React, { useState } from 'react';
import { api, errorMessage } from '../../services/apiClient.ts';
import { useAuth } from '../../context/AuthContext.tsx';
import { useFarm } from '../../context/FarmContext.tsx';
import { AlertDialog, Banner, ConfirmDialog } from '../ui/Feedback.tsx';
import { formatDateId, resolveCycleStatus, todayIso } from '../../utils/format.ts';

type ConfirmKind = 'request_close' | 'cancel_request';

const DashboardCloseCycleControls: React.FC = () => {
  const { user } = useAuth();
  const { selectedCycle, reload } = useFarm();
  const [proposedCloseDate, setProposedCloseDate] = useState(todayIso());
  const [confirmKind, setConfirmKind] = useState<ConfirmKind | null>(null);
  const [busy, setBusy] = useState(false);
  const [error, setError] = useState<string | null>(null);
  const [notice, setNotice] = useState<string | null>(null);

  const canRequestClose = user?.status === 'active';
  const status = selectedCycle ? resolveCycleStatus(selectedCycle) : null;
  const showControls = Boolean(canRequestClose && selectedCycle && status !== 'closed');

  const run = async (action: () => Promise<void>, successMessage: string) => {
    if (!selectedCycle) return;
    setBusy(true);
    setError(null);
    try {
      await action();
      await reload();
      setNotice(successMessage);
      setConfirmKind(null);
    } catch (err) {
      setConfirmKind(null);
      setError(errorMessage(err));
      void reload();
    } finally {
      setBusy(false);
    }
  };

  if (!showControls && !error) return null;

  return (
    <div className="flex flex-col items-end gap-1">
      {showControls && notice && <Banner kind="success">{notice}</Banner>}
      {showControls && status === 'active' && selectedCycle && (
        <div className="flex flex-wrap items-center justify-end gap-2">
          <label className="flex items-center gap-1 text-xs text-gray-600">
            <span className="sr-only">Tanggal usulan tutup</span>
            <input
              type="date"
              className="border border-gray-300 rounded-lg px-2 py-2 text-sm"
              min={selectedCycle.start_date}
              value={proposedCloseDate}
              onChange={(e) => setProposedCloseDate(e.target.value)}
              disabled={busy}
            />
          </label>
          <button
            type="button"
            className="rounded-lg bg-red-600 px-4 py-2 text-sm font-semibold text-white shadow-sm hover:bg-red-700 disabled:opacity-50"
            disabled={busy || !proposedCloseDate}
            onClick={() => {
              setNotice(null);
              setError(null);
              setConfirmKind('request_close');
            }}
          >
            Ajukan tutup
          </button>
        </div>
      )}
      {showControls && status === 'pending_close' && selectedCycle && (
        <div className="flex flex-col items-end gap-1">
          {selectedCycle.proposed_end_date && (
            <p className="text-xs text-amber-700">
              Menunggu GM · usulan {formatDateId(selectedCycle.proposed_end_date)}
            </p>
          )}
          <button
            type="button"
            className="rounded-lg border border-amber-600 px-4 py-2 text-sm font-semibold text-amber-800 hover:bg-amber-50 disabled:opacity-50"
            disabled={busy}
            onClick={() => {
              setNotice(null);
              setError(null);
              setConfirmKind('cancel_request');
            }}
          >
            Batalkan permintaan
          </button>
        </div>
      )}

      <ConfirmDialog
        open={confirmKind === 'request_close'}
        title="Ajukan tutup siklus?"
        message={
          <p>
            Permintaan tutup akan dikirim ke pusat dengan tanggal usulan{' '}
            <strong>{formatDateId(proposedCloseDate)}</strong>. GM harus menyetujui sebelum siklus
            ditutup. Anda masih bisa membatalkan selama status menunggu GM.
          </p>
        }
        confirmLabel="Ya, ajukan tutup"
        busy={busy}
        onCancel={() => {
          if (!busy) setConfirmKind(null);
        }}
        onConfirm={() => {
          if (busy || !selectedCycle) return;
          void run(
            () =>
              api.cycles
                .requestClose(selectedCycle.id, {
                  proposed_end_date: proposedCloseDate,
                })
                .then(() => undefined),
            'Permintaan tutup dikirim ke pusat.'
          );
        }}
      />

      <ConfirmDialog
        open={confirmKind === 'cancel_request'}
        title="Batalkan permintaan tutup?"
        message={
          <p>
            Permintaan tutup ke pusat akan dibatalkan. Siklus tetap aktif dan dapat diajukan tutup
            lagi nanti.
          </p>
        }
        confirmLabel="Ya, batalkan"
        busy={busy}
        onCancel={() => {
          if (!busy) setConfirmKind(null);
        }}
        onConfirm={() => {
          if (busy || !selectedCycle) return;
          void run(
            () => api.cycles.cancelCloseRequest(selectedCycle.id).then(() => undefined),
            'Permintaan tutup dibatalkan.'
          );
        }}
      />

      <AlertDialog
        open={error != null}
        title="Gagal mengajukan tutup"
        kind="error"
        message={<p className="whitespace-pre-wrap break-words">{error}</p>}
        dismissLabel="Tutup"
        onDismiss={() => setError(null)}
      />
    </div>
  );
};

export default DashboardCloseCycleControls;