"use client"

import { Terminal } from "@xterm/xterm"
import { FitAddon } from "@xterm/addon-fit"

import { useEffect, useRef, useState } from "react"
import { Socket } from "socket.io-client"
import { decodeTerminalResponse } from "@/lib/utils"

export default function EditorTerminal({ socket }: { socket: Socket }) {
  const terminalRef = useRef(null)
  const [term, setTerm] = useState<Terminal | null>(null)

  useEffect(() => {
    if (!terminalRef.current) return

    const terminal = new Terminal({
      cursorBlink: false,
    })

    setTerm(terminal)

    return () => {
      if (terminal) terminal.dispose()
    }
  }, [])

  useEffect(() => {
    if (!term) return

    const onConnect = () => {
      console.log("Connected to server", socket.connected)
      setTimeout(() => {
        console.log("sending createTerminal")
        socket.emit("createTerminal", { id: "testId" })
      }, 500)
    }

    const onTerminalResponse = (data: Buffer) => {
      console.log("received data", decodeTerminalResponse(data))
      term.write(decodeTerminalResponse(data))
    }

    socket.on("connect", onConnect)

    if (terminalRef.current) {
      socket.on("terminalResponse", onTerminalResponse)

      const fitAddon = new FitAddon()
      term.loadAddon(fitAddon)
      term.open(terminalRef.current)
      fitAddon.fit()
      setTerm(term)
    }
    const disposable = term.onData((data) => {
      console.log("sending data", data)
      socket.emit("terminalData", {
        id: "testId",
        data,
      })
    })

    socket.emit("terminalData", {
      data: "\n",
    })

    return () => {
      socket.off("connect", onConnect)
      socket.off("terminalResponse", onTerminalResponse)
      disposable.dispose()
    }
  }, [term, terminalRef.current])

  return (
    <div>
      <div ref={terminalRef} className="w-full h-1/2 text-left"></div>
    </div>
  )
}