'use strict';

// === KEYBOARD INPUT SYSTEM ===

const inputSystem = {
  keys: {},
  justPressed: {},
  actions: {},

  init() {
    document.addEventListener('keydown', (e) => {
      if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'Space', 'Enter', 'ShiftLeft', 'ShiftRight', 'KeyE', 'KeyI', 'KeyQ', 'Tab'].includes(e.code)) {
        e.preventDefault();
      }
      if (!this.keys[e.code]) {
        this.justPressed[e.code] = true;
      }
      this.keys[e.code] = true;
    });
    document.addEventListener('keyup', (e) => {
      this.keys[e.code] = false;
    });
  },

  clearKeys() {
    this.keys = {};
    this.justPressed = {};
  },

  update(dt) {
    // Process actions
    this.actions = {
      move: this.getMove(),
      attack: this.justPressed['Space'] || this.justPressed['KeyZ'],
      interact: this.justPressed['KeyE'] || this.justPressed['Enter'],
      menu: this.justPressed['KeyI'],
      back: this.justPressed['Escape'] || this.justPressed['KeyQ'],
      switchWeapon: this.justPressed['KeyX'],
      useItem: this.justPressed['KeyR'],
      bomb: this.justPressed['KeyB'],
    };

    // Clear justPressed for next frame
    this.justPressed = {};
  },

  getMove() {
    let dx = 0, dy = 0;
    if (this.keys['ArrowUp'] || this.keys['KeyW']) dy = -1;
    else if (this.keys['ArrowDown'] || this.keys['KeyS']) dy = 1;
    if (this.keys['ArrowLeft'] || this.keys['KeyA']) dx = -1;
    else if (this.keys['ArrowRight'] || this.keys['KeyD']) dx = 1;
    if (dx !== 0 || dy !== 0) return { dx, dy };
    return null;
  },

  getAction(name) {
    return this.actions[name] || false;
  },

  isKeyDown(code) {
    return !!this.keys[code];
  },

  wasKeyPressed(code) {
    return !!this.justPressed[code];
  },
};

function initKeyboard() {
  inputSystem.init();
}

if (typeof module !== 'undefined' && module.exports) {
  module.exports = { inputSystem, initKeyboard, isKeyDown: (code) => inputSystem.isKeyDown(code),
    isKeyJustPressed: (code) => inputSystem.wasKeyPressed(code),
    setKeyHandlers: () => {},
    resetKeys: () => inputSystem.clearKeys(),
    getMove: () => inputSystem.getMove(),
    getAction: (name) => inputSystem.getAction(name),
    clearKeys: () => inputSystem.clearKeys(),
    update: (dt) => inputSystem.update(dt) };
}