"use client";

import { useState, useEffect, useRef } from "react";
import { QUOTES } from "@/lib/quotes";

export default function TerminalBox({ children }: { children: React.ReactNode }) {
  // ---- BOOT SEQUENCE STATES ----
  const [showFirstPrompt, setShowFirstPrompt] = useState(false);
  const [showEnterEcho, setShowEnterEcho] = useState(false);
  const [typedCommand1, setTypedCommand1] = useState("");
  const [showQuote, setShowQuote] = useState(false);
  const [quote, setQuote] = useState("");
  const [typedCommand2, setTypedCommand2] = useState("");
  const [showLoader, setShowLoader] = useState(false);
  const [loaderProgress, setLoaderProgress] = useState(0);
  const [showTree, setShowTree] = useState(false);
  const [showIntroDone, setShowIntroDone] = useState(false);

  // ---- INTERACTIVE STATES ----
  const [history, setHistory] = useState<{ type: "input" | "output"; text: any }[]>([]);
  const [currentInput, setCurrentInput] = useState("");
  const inputRef = useRef<HTMLInputElement>(null);

  // ---------------------------------------------------------
  // BOOT SEQUENCE
  // ---------------------------------------------------------
  useEffect(() => {
    setQuote(QUOTES[Math.floor(Math.random() * QUOTES.length)]);

    setTimeout(() => setShowFirstPrompt(true), 400);
    setTimeout(() => setShowEnterEcho(true), 1500);
    setTimeout(() => typeCommand1(), 1800);
  }, []);

  // TYPE ONLY COMMAND, NOT PROMPT
  const typeCommand1 = () => {
    const cmd = "quoteOfTheDay";
    let i = 0;

    const interval = setInterval(() => {
      setTypedCommand1(cmd.slice(0, i + 1));
      i++;

      if (i >= cmd.length) {
        clearInterval(interval);
        setTimeout(() => setShowQuote(true), 300);
        setTimeout(() => typeCommand2(), 1200);
      }
    }, 50);
  };

  const typeCommand2 = () => {
    const cmd = "tree .";
    let i = 0;

    const interval = setInterval(() => {
      setTypedCommand2(cmd.slice(0, i + 1));
      i++;

      if (i >= cmd.length) {
        clearInterval(interval);
        setTimeout(() => startLoader(), 400);
      }
    }, 50);
  };

  const startLoader = () => {
    setShowLoader(true);
    let progress = 0;

    const interval = setInterval(() => {
      progress += Math.random() * 20;

      if (progress >= 100) {
        progress = 100;
        clearInterval(interval);

        setTimeout(() => {
          setShowTree(true);
          setShowLoader(false);
          setShowIntroDone(true);
          setTimeout(() => inputRef.current?.focus(), 200);
        }, 500);
      }

      setLoaderProgress(Math.floor(progress));
    }, 200);
  };

  // ---------------------------------------------------------
  // COMMAND REGISTRY
  // ---------------------------------------------------------
  const commands: Record<string, (args: string[]) => any> = {
    quoteOfTheDay: () => QUOTES[Math.floor(Math.random() * QUOTES.length)],

    help: () => `
Available commands:
  quoteOfTheDay     Show a random quote
  tree .            Show the file structure
  ls, ls -la        Minimal directory listing
  cd <path>         Playful message about not leaving
  pwd               Print working directory
  whoami            Identify yourself
  motivation        Generate motivation (may crash)
  vibecheck         Check the vibe
  clear             I will not clear your history :)
  exit              You can't exit, it's a website
`,

    pwd: () => "/home/juntekim/site",
    whoami: () => "juntekim",

    clear: () => "no ❤️ you need to face your past commands.",

    motivation: () => [
      "Compiling motivation…",
      setTimeout(() => {
        setHistory(h => [...h, { type: "output", text: "Segmentation fault (core dumped)" }]);
      }, 500),
    ],

    vibecheck: () => {
      const vibes = [
        "vibes immaculate ✨",
        "vibes questionable 🧐",
        "vibes under maintenance 🚧",
        "vibes loading… 0%",
        "vibes not found",
      ];
      return vibes[Math.floor(Math.random() * vibes.length)];
    },

    exit: () => "bro it's a website. chill.",
    ls: () => "nothing to see here 👀",
    "ls -la": () => "nothing to see here 👀",

    cd: () => "where you trying to go? everything you need is in tree .",

    tree: () => [
      "Compiling…",
      setTimeout(() => {
        setHistory(h => [...h, { type: "output", text: "/" }]);
        setHistory(h => [...h, { type: "output", text: children }]);
      }, 400),
    ],
  };

  // ---------------------------------------------------------
  // COMMAND EXECUTION
  // ---------------------------------------------------------
  const handleCommand = (cmd: string) => {
    const parts = cmd.trim().split(" ");
    const base = parts[0];
    const args = parts.slice(1);

    setHistory(h => [...h, { type: "input", text: cmd }]);

    if (cmd === "tree .") return commands["tree"](args);

    if (commands[base]) {
      const output = commands[base](args);
      if (typeof output === "string") {
        setHistory(h => [...h, { type: "output", text: output }]);
      }
      return;
    }

    if (base === "cd") {
      setHistory(h => [...h, { type: "output", text: commands["cd"](args) }]);
      return;
    }

    setHistory(h => [...h, { type: "output", text: `command not found: ${cmd}` }]);
  };

  const onKeyDown = (e: any) => {
    if (e.key === "Enter") {
      handleCommand(currentInput);
      setCurrentInput("");
    }
  };

  // ---------------------------------------------------------
  // RENDER
  // ---------------------------------------------------------
  return (
    <div
      className="rounded-lg border border-zinc-700 bg-black text-zinc-100 p-4 font-mono text-sm shadow-xl w-full max-w-2xl"
      style={{ whiteSpace: "pre-wrap" }}
    >
      {/* BOOT SEQUENCE */}
      {showFirstPrompt && <div className="text-green-400">juntekim@site:~$</div>}
      {showEnterEcho && <div className="text-green-400">juntekim@site:~$</div>}

      {typedCommand1 && (
        <div className="flex">
          <span className="text-green-400">juntekim@site:~$&nbsp;</span>
          <span className="text-zinc-300">{typedCommand1}</span>
        </div>
      )}

      {showQuote && <div className="text-zinc-300 italic my-2">{quote}</div>}

      {typedCommand2 && (
        <div className="flex">
          <span className="text-green-400">juntekim@site:~$&nbsp;</span>
          <span className="text-zinc-300">{typedCommand2}</span>
        </div>
      )}

      {showLoader && (
        <div className="text-green-400 mt-2">compiling… {loaderProgress}%</div>
      )}

      {showTree && (
        <div className="text-zinc-300 mt-2">
          /
          {children}
        </div>
      )}

      {/* INTERACTIVE MODE */}
      {showIntroDone && (
        <>
          {history.map((item, idx) => (
            <div key={idx} className="flex">
              {item.type === "input" ? (
                <>
                  <span className="text-green-400">juntekim@site:~$&nbsp;</span>
                  <span className="text-zinc-300">{item.text}</span>
                </>
              ) : (
                <span className="text-zinc-300">{item.text}</span>
              )}
            </div>
          ))}

          <div className="flex items-center mt-1">
            <span className="text-green-400">juntekim@site:~$&nbsp;</span>
            <input
              ref={inputRef}
              value={currentInput}
              onChange={(e) => setCurrentInput(e.target.value)}
              onKeyDown={onKeyDown}
              className="bg-black text-zinc-300 outline-none w-full"
              autoFocus
            />
          </div>
        </>
      )}
    </div>
  );
}