/* Neon Rampage — bootstrap & input (keyboard, mouse, touch sticks). */
(function () {
  'use strict';
  var US = (window.US = window.US || {});

  var input = {
    up: false, down: false, left: false, right: false,
    firing: false,
    aimX: 640, aimY: 360,
    moveVec: null // touch stick vector {x,y}
  };
  US.input = input;

  var canvas, touchUI = {};
  var stickMove = null, stickAim = null; // active touches

  function toWorld(e) {
    var r = canvas.getBoundingClientRect();
    var g = US.game.get();
    if (!g) return { x: input.aimX, y: input.aimY };
    var scale = Math.min(r.width / g.W, r.height / g.H);
    var ox = (r.width - g.W * scale) / 2;
    var oy = (r.height - g.H * scale) / 2;
    return {
      x: (e.clientX - r.left - ox) / scale,
      y: (e.clientY - r.top - oy) / scale
    };
  }

  function bindKeyboard() {
    window.addEventListener('keydown', function (e) {
      switch (e.code) {
        case 'KeyW': case 'ArrowUp': input.up = true; break;
        case 'KeyS': case 'ArrowDown': input.down = true; break;
        case 'KeyA': case 'ArrowLeft': input.left = true; break;
        case 'KeyD': case 'ArrowRight': input.right = true; break;
        case 'Space': input.firing = true; e.preventDefault(); break;
        case 'KeyR': US.game.castUlt(); break;
        case 'KeyF': {
          var on2 = US.game.toggleAutoAim();
          var t3 = document.getElementById('toast');
          if (t3) {
            t3.textContent = on2 ? '🎯 Auto-aim ON' : '✋ Auto-aim OFF';
            t3.classList.remove('hidden');
            clearTimeout(t3._tt);
            t3._tt = setTimeout(function () { t3.classList.add('hidden'); }, 1400);
          }
          break;
        }
        case 'KeyQ': US.game.useBomb(); break;
        case 'KeyP': case 'Escape':
          if (!togglePause()) {
            // if paused via overlay button, resume
            if (US.game.resume()) document.getElementById('overlay-pause').classList.add('hidden');
          }
          break;
      }
      if (['ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight'].indexOf(e.code) >= 0) e.preventDefault();
    });
    window.addEventListener('keyup', function (e) {
      switch (e.code) {
        case 'KeyW': case 'ArrowUp': input.up = false; break;
        case 'KeyS': case 'ArrowDown': input.down = false; break;
        case 'KeyA': case 'ArrowLeft': input.left = false; break;
        case 'KeyD': case 'ArrowRight': input.right = false; break;
        case 'Space': input.firing = false; break;
      }
    });
  }

  function togglePause() {
    if (US.game.pause()) {
      document.getElementById('overlay-pause').classList.remove('hidden');
      return true;
    }
    return false;
  }

  function bindMouse() {
    canvas.addEventListener('mousemove', function (e) {
      var w = toWorld(e);
      input.aimX = w.x; input.aimY = w.y;
    });
    canvas.addEventListener('mousedown', function (e) {
      if (e.button === 0) {
        var w = toWorld(e);
        input.aimX = w.x; input.aimY = w.y;
        input.firing = true;
      }
      US.audio.resume();
    });
    window.addEventListener('mouseup', function () { input.firing = false; });
    canvas.addEventListener('contextmenu', function (e) { e.preventDefault(); });
  }

  /* ---------------- touch: twin virtual sticks ---------------- */
  function makeStick(el) {
    var knob = el.querySelector('.stick-knob');
    var base = el.getBoundingClientRect();
    var id = null, vec = { x: 0, y: 0 };

    function setVec(t) {
      var r = el.getBoundingClientRect();
      var cx = r.left + r.width / 2, cy = r.top + r.height / 2;
      var dx = t.clientX - cx, dy = t.clientY - cy;
      var max = r.width / 2;
      var d = Math.hypot(dx, dy);
      if (d > max) { dx *= max / d; dy *= max / d; }
      vec.x = dx / max; vec.y = dy / max;
      knob.style.transform = 'translate(' + dx + 'px,' + dy + 'px)';
    }
    el.addEventListener('touchstart', function (e) {
      e.preventDefault();
      var t = e.changedTouches[0];
      id = t.identifier;
      setVec(t);
    }, { passive: false });
    el.addEventListener('touchmove', function (e) {
      e.preventDefault();
      for (var i = 0; i < e.changedTouches.length; i++) {
        if (e.changedTouches[i].identifier === id) setVec(e.changedTouches[i]);
      }
    }, { passive: false });
    function end(e) {
      for (var i = 0; i < e.changedTouches.length; i++) {
        if (e.changedTouches[i].identifier === id) {
          id = null;
          vec.x = 0; vec.y = 0;
          knob.style.transform = '';
        }
      }
    }
    el.addEventListener('touchend', end);
    el.addEventListener('touchcancel', end);
    return vec;
  }

  function isTouchDevice() {
    return ('ontouchstart' in window) || navigator.maxTouchPoints > 0;
  }

  function bindTouch() {
    if (!isTouchDevice()) return;
    var root = document.getElementById('touch-ui');
    root.classList.remove('hidden');
    touchUI.fireBtn = document.getElementById('tc-fire');
    touchUI.ultBtn = document.getElementById('tc-ult');
    touchUI.bombBtn = document.getElementById('tc-bomb');

    stickMove = makeStick(document.getElementById('stick-move'));
    stickAim = makeStick(document.getElementById('stick-aim'));

    // live vector refs — game reads these directly each frame (no polling)
    input.moveVec = stickMove;
    input.aimVec = stickAim;

    touchUI.fireBtn.addEventListener('touchstart', function (e) { e.preventDefault(); input.firing = true; }, { passive: false });
    touchUI.fireBtn.addEventListener('touchend', function () { input.firing = false; });
    touchUI.ultBtn.addEventListener('touchstart', function (e) { e.preventDefault(); US.game.castUlt(); }, { passive: false });
    touchUI.bombBtn.addEventListener('touchstart', function (e) { e.preventDefault(); US.game.useBomb(); }, { passive: false });
  }

  /* ---------------- boot ---------------- */
  window.addEventListener('DOMContentLoaded', function () {
    canvas = document.getElementById('game');
    US.i18n.setLang(US.save.get().lang);
    US.ui.init();
    US.game.mount(canvas);
    bindKeyboard();
    bindMouse();
    bindTouch();

    // default aim ahead of player
    input.aimX = 800; input.aimY = 360;
    input.moveVec = null; // replaced by live stick ref on touch devices

    // unlock audio on first interaction anywhere
    ['pointerdown', 'keydown', 'touchstart'].forEach(function (ev) {
      window.addEventListener(ev, function once() {
        US.audio.resume();
        window.removeEventListener(ev, once);
      });
    });
  });
})();