import { useEffect, useRef } from 'react';

import TerminalManager from '@/controllers/terminal_manager';

import XTerm, { XTermRef } from '../xterm';

interface TerminalInstanceProps {
  id: string
}

export function TerminalInstance ({ id }: TerminalInstanceProps) {
  const termRef = useRef<XTermRef>(null);
  const connected = useRef(false);

  const handleData = (data: string) => {
    try {
      const parsed = JSON.parse(data);
      if (parsed.data) {
        termRef.current?.write(parsed.data);
      }
    } catch (_e) {
      termRef.current?.write(data);
    }
  };

  useEffect(() => {
    return () => {
      if (connected.current) {
        TerminalManager.disconnectTerminal(id, handleData);
      }
    };
  }, [id]);

  const handleInput = (data: string) => {
    TerminalManager.sendInput(id, data);
  };

  const handleResize = (cols: number, rows: number) => {
    if (!connected.current) {
      connected.current = true;
      console.log('instance', rows, cols);
      TerminalManager.connectTerminal(id, handleData, { rows, cols });
    } else {
      TerminalManager.sendResize(id, cols, rows);
    }
  };

  return (
    <XTerm
      ref={termRef}
      onInput={handleInput}
      onResize={handleResize} // 使用 fitAddon 改变后触发的 resize 回调
      className='w-full h-full'
    />
  );
}