import { useEffect, useState } from 'react';
import {
  SupportProvider,
  useAssignedTickets,
  useGoOnline,
  useThread,
  useMessages,
  type Ticket,
} from '@insignia/iios-support-web';

const SERVICE = 'http://localhost:3200';
const APP_ID = 'portal-demo';
const AGENT_ID = 'agent1';

async function devToken(userId: string): Promise<string> {
  const r = await fetch(`${SERVICE}/v1/dev/token`, {
    method: 'POST',
    headers: { 'content-type': 'application/json' },
    body: JSON.stringify({ appId: APP_ID, userId, name: userId }),
  });
  if (!r.ok) throw new Error(`devToken ${r.status} (service running with IIOS_DEV_TOKENS=1?)`);
  return ((await r.json()) as { token: string }).token;
}

function AgentChat({ threadId }: { threadId: string }) {
  const { open } = useThread();
  useEffect(() => {
    void open(threadId);
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [threadId]);
  const { messages, send } = useMessages(threadId);
  const [text, setText] = useState('');
  return (
    <div style={{ flex: 1, padding: 12, fontFamily: 'sans-serif' }}>
      <h3 style={{ marginTop: 0 }}>Thread {threadId.slice(0, 8)}</h3>
      <div style={{ height: 280, overflow: 'auto', background: '#fafafa', padding: 8 }}>
        {messages.map((m) => (
          <div key={m.id} style={{ padding: '2px 0' }}>
            <b>{m.senderActorId.slice(0, 6)}:</b> {m.content}
          </div>
        ))}
      </div>
      <input
        value={text}
        placeholder="reply as agent + Enter"
        style={{ width: '100%', padding: 6, marginTop: 8 }}
        onChange={(e) => setText(e.target.value)}
        onKeyDown={(e) => {
          if (e.key === 'Enter' && text.trim()) {
            void send(text.trim());
            setText('');
          }
        }}
      />
    </div>
  );
}

function AgentInner() {
  const goOnline = useGoOnline();
  const { tickets } = useAssignedTickets();
  const [threadId, setThreadId] = useState<string | null>(null);

  useEffect(() => {
    void goOnline(); // join default queue + go AVAILABLE
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, []);

  return (
    <div style={{ display: 'flex', fontFamily: 'sans-serif' }}>
      <div style={{ width: 240, borderRight: '1px solid #ddd', padding: 12 }}>
        <b>Assigned tickets ({tickets.length})</b>
        {tickets.length === 0 && <div style={{ color: '#999', marginTop: 6 }}>waiting for escalations…</div>}
        {tickets.map((t: Ticket) => {
          const tid = t.threadLinks?.[0]?.threadId ?? null;
          return (
            <div key={t.id} style={{ padding: '6px 0', borderBottom: '1px solid #eee' }}>
              <div style={{ fontWeight: 600 }}>{t.subject}</div>
              <div style={{ color: '#999' }}>{t.state}</div>
              <button disabled={!tid} onClick={() => setThreadId(tid)}>
                open thread
              </button>
            </div>
          );
        })}
      </div>
      {threadId ? <AgentChat threadId={threadId} /> : <div style={{ flex: 1, padding: 12 }}>Select a ticket.</div>}
    </div>
  );
}

export function App() {
  const [token, setToken] = useState<string | null>(null);
  useEffect(() => {
    void devToken(AGENT_ID).then(setToken);
  }, []);
  if (!token) return <div style={{ padding: 16, fontFamily: 'sans-serif' }}>loading agent…</div>;
  return (
    <div style={{ padding: 16 }}>
      <h2 style={{ fontFamily: 'sans-serif' }}>IIOS P4 — Agent Dashboard ({AGENT_ID})</h2>
      <SupportProvider serviceUrl={SERVICE} token={token}>
        <AgentInner />
      </SupportProvider>
    </div>
  );
}