namastejs/src/games/typing-rain/index.js

A spiritual greeting from your JavaScript code. Because every function deserves a 'Namaste 🙏'

const readline = require("readline");
const {
  initScreen,
  updateHeader,
  renderBody,
  renderInput,
  parkCursor,
  BODY_HEIGHT,
  BODY_WIDTH,
} = require("./renderer");

const { initInput } = require("./input");
const { WORDS, WORD_COLORS } = require("../data/words");
const { style } = require("../../../theme");

// 🔒 Hide cursor during game
process.stdout.write("\x1B[?25l");

let words = [];
let score = 0;
let dropped = 0;
let speed = 1000; // slow start
let backspaceDisabled = false;
let gameRunning = true;
let isPaused = false;

// ─── HELPERS ───────────────────────────────
function randomWord() {
  return WORDS[Math.floor(Math.random() * WORDS.length)];
}

function randomColor() {
  return WORD_COLORS[Math.floor(Math.random() * WORD_COLORS.length)];
}

function spawnWord() {
  const text = randomWord();
  const x = Math.floor(Math.random() * (BODY_WIDTH - text.length - 2));
  words.push({ text, x, y: 0, color: randomColor() });
}

function restoreTerminal() {
  process.stdout.write("\x1B[?25h"); // show cursor back
  process.stdin.setRawMode(false);
  process.stdin.pause();
}

function gameOver() {
  gameRunning = false;
  restoreTerminal();
  process.stdout.write("\x1Bc");

  console.log(style.red("\n💀 GAME OVER 💀"));
  console.log(style.gold(`🏆 Final Score: ${score}`));
  console.log(style.cyan("🙏 Thanks for playing Typing Rain 🙏\n"));

  process.exit();
}

function togglePause() {
  isPaused = !isPaused;
  updateHeader({ score, lives: Math.max(0, 3 - dropped), dropped, isPaused });
}

// ─── MAIN GAME LOOP (SMOOTH & DYNAMIC) ──────
function gameLoop() {
  if (!gameRunning || isPaused) {
    setTimeout(gameLoop, speed);
    return;
  }

  // move words down
  words.forEach((w) => w.y++);

  // drop detection
  words = words.filter((w) => {
    if (w.y >= BODY_HEIGHT) {
      dropped++;
      if (dropped >= 3) gameOver();
      return false;
    }
    return true;
  });

  renderBody(words);

  updateHeader({
    score,
    lives: Math.max(0, 3 - dropped),
    dropped,
    isPaused,
  });
  parkCursor();

  setTimeout(gameLoop, speed);
}

// ─── INPUT HANDLING (EXTERNALIZED) ──────────
initInput({
  onSubmit: (typedWord) => {
    const index = words.findIndex((w) => w.text === typedWord);

    if (index !== -1) {
      words.splice(index, 1);
      score++;

      // 🔥 Level-up rule
      if (score === 10 && !backspaceDisabled) {
        backspaceDisabled = true;
        speed -= 100;
        readline.cursorTo(process.stdout, 2, BODY_HEIGHT + 6);
        console.log("⚠️ Level Up! Backspace disabled");
        parkCursor();
      }

      // increase difficulty
      if (score === 15) speed -= 100;
      if (score === 25) speed -= 100;
      if (score === 30) speed -= 100;
      if (score === 35) speed -= 100;
      if (score === 40) speed -= 100;
      if (score === 45) speed -= 100;
    }
  },

  onExit: gameOver,

  onInputChange: (input) => {
    renderInput(input);
    parkCursor();
  },

  onPauseToggle: togglePause,
  isBackspaceDisabled: () => backspaceDisabled,
});

// ─── START GAME ─────────────────────────────
initScreen();
updateHeader({ score, lives: 3, dropped, isPaused });
renderInput("");
parkCursor();

// spawn words independently
spawnInterval = setInterval(() => {
  if (!isPaused) spawnWord();
}, 2000);

// start falling loop
gameLoop();