import { For, Show, createSignal, onMount } from 'solid-js';
import { BTN_GHOST, CARD } from '~/components/DashboardShell';

const API = '/api/gateway';

type ApplicationItem = {
  id: string;
  job_id: string;
  status: string;
  applied_at?: string;
  resume_url?: string | null;
  cover_letter?: string | null;
};

async function apiFetch(path: string, opts?: RequestInit) {
  return fetch(`${API}${path}`, {
    ...opts,
    credentials: 'include',
    headers: { 'Content-Type': 'application/json', ...(opts?.headers ?? {}) },
  });
}

export default function JobSeekerApplicationsPage() {
  const [rows, setRows] = createSignal<ApplicationItem[]>([]);
  const [loading, setLoading] = createSignal(true);
  const [statusFilter, setStatusFilter] = createSignal('');
  const [err, setErr] = createSignal('');

  const loadRows = async (status = statusFilter()) => {
    setLoading(true);
    setErr('');
    try {
      const query = new URLSearchParams();
      query.set('page', '1');
      query.set('limit', '100');
      if (status) query.set('status', status);
      const res = await apiFetch(`/api/jobseeker/applications?${query.toString()}`);
      const payload = await res.json().catch(() => ({}));
      if (!res.ok) {
        setErr(payload.error || payload.message || 'Failed to load applications.');
        setRows([]);
        return;
      }
      setRows(Array.isArray(payload?.data) ? payload.data : []);
    } catch {
      setErr('Network error while loading applications.');
      setRows([]);
    } finally {
      setLoading(false);
    }
  };

  onMount(() => loadRows());

  return (
    <div style={{ display: 'grid', gap: '14px', 'max-width': '980px' }}>
      <div style={CARD}>
        <p style={{ margin: '0', 'font-size': '22px', 'font-weight': '800', color: '#0D0D2A' }}>My Applications</p>
        <p style={{ margin: '4px 0 0', 'font-size': '13px', color: '#6B7280' }}>Track all jobs you applied for.</p>
      </div>

      <Show when={err()}>
        <div style={{ ...CARD, border: '1px solid #FECACA', background: '#FEF2F2', padding: '12px 14px', color: '#B91C1C', 'font-size': '13px', 'font-weight': '600' }}>{err()}</div>
      </Show>

      <div style={CARD}>
        <div style={{ display: 'flex', 'justify-content': 'space-between', 'align-items': 'flex-end', gap: '10px', 'flex-wrap': 'wrap' }}>
          <div>
            <p style={{ margin: '0 0 6px', 'font-size': '12px', 'font-weight': '600', color: '#374151' }}>Status Filter</p>
            <select
              value={statusFilter()}
              onChange={(e) => {
                const next = e.currentTarget.value;
                setStatusFilter(next);
                loadRows(next);
              }}
              style={{ height: '38px', 'border-radius': '8px', border: '1px solid #E5E7EB', padding: '0 10px', 'font-size': '13px' }}
            >
              <option value="">All</option>
              <option value="APPLIED">Applied</option>
              <option value="UNDER_REVIEW">Under Review</option>
              <option value="SHORTLISTED">Shortlisted</option>
              <option value="REJECTED">Rejected</option>
              <option value="WITHDRAWN">Withdrawn</option>
            </select>
          </div>
          <button type="button" onClick={() => loadRows()} style={BTN_GHOST}>Refresh</button>
        </div>
      </div>

      <div style={CARD}>
        <Show when={loading()}>
          <p style={{ margin: '0', color: '#9CA3AF', 'font-size': '13px' }}>Loading applications...</p>
        </Show>
        <Show when={!loading() && rows().length === 0}>
          <p style={{ margin: '0', color: '#6B7280', 'font-size': '13px' }}>No applications found.</p>
        </Show>
        <Show when={!loading() && rows().length > 0}>
          <div style={{ display: 'grid', gap: '10px' }}>
            <For each={rows()}>
              {(row) => (
                <div style={{ border: '1px solid #E5E7EB', 'border-radius': '12px', padding: '12px', background: '#FCFCFD' }}>
                  <div style={{ display: 'flex', 'justify-content': 'space-between', gap: '10px', 'flex-wrap': 'wrap' }}>
                    <div>
                      <p style={{ margin: '0', 'font-size': '14px', 'font-weight': '800', color: '#111827' }}>Application #{row.id.slice(0, 8)}</p>
                      <p style={{ margin: '4px 0 0', 'font-size': '12px', color: '#6B7280' }}>
                        Job: {row.job_id?.slice(0, 8) || '—'} {row.applied_at ? `• ${new Date(row.applied_at).toLocaleString('en-IN')}` : ''}
                      </p>
                    </div>
                    <span style={{ display: 'inline-flex', height: '24px', 'align-items': 'center', padding: '0 10px', 'border-radius': '999px', background: '#EEF2FF', color: '#3730A3', 'font-size': '11px', 'font-weight': '700' }}>
                      {String(row.status || 'APPLIED').replace(/_/g, ' ')}
                    </span>
                  </div>
                  <Show when={row.cover_letter}>
                    <p style={{ margin: '8px 0 0', 'font-size': '13px', color: '#374151' }}>{row.cover_letter}</p>
                  </Show>
                  <Show when={row.resume_url}>
                    <p style={{ margin: '8px 0 0', 'font-size': '12px' }}>
                      <a href={row.resume_url!} target="_blank" rel="noreferrer" style={{ color: '#1D4ED8', 'font-weight': '600' }}>
                        View Resume
                      </a>
                    </p>
                  </Show>
                </div>
              )}
            </For>
          </div>
        </Show>
      </div>
    </div>
  );
}