<div id="guide">
  <p>Once your mouse has control of the ship, click to give the window focus.</p>
  <p><kbd>T</kbd> = show/hide controls</p>
</div>
<div id="controls">
  <p><span><kbd>space</kbd></span> : fire</p>
  <p><span><kbd>D</kbd></span> : open/close wings</p>
  <p><span><kbd>F</kbd></span> : boost (with wings open)</p>
  <p><span><kbd>S</kbd></span> : cycle to next weapon</p>
  <p><span><kbd>1</kbd></span> : select weapon 1</p>
  <p><span><kbd>2</kbd></span> : select weapon 2</p>
  <p><span><kbd>3</kbd></span> : select weapon 3</p>
  <p><span><kbd>4</kbd></span> : select weapon 4</p>
  <p><span><kbd>5</kbd></span> : select weapon 5</p>
  <p><span><kbd>6</kbd></span> : select weapon 6</p>
  <p><span><kbd>7</kbd></span> : select weapon 7</p>
  <p><span><kbd>8</kbd></span> : select weapon 8</p>
  <p><span><kbd>9</kbd></span> : select weapon 9</p>
</div>

<div id="ship">
  <div class="hull">
    <div class="thrust"></div>
    <div class="left"></div>
    <div class="right"></div>
    <div class="cockpit"></div>
  </div>
  
  <div class="wings">
    <div class="left"></div>
    <div class="right"></div>
  </div>
  <div class="windstream"></div>
</div>

<div id="environment">
</div>

/* start mixins */
@mixin rightTriangle($vert: "top", $y: 1, $horz: "left", $x: 1, $color: red) {
  height: 0;
  width: 0;
  @if $vert == "top" {
    border-bottom: none;
    border-top: $x+rem solid $color;
  }
  @else {
    border-bottom: $x+rem solid $color;
    border-top: none;
  }
  @if $horz == "left" {
    border-left: none;
    border-right: $y+rem solid transparent;
  }
  @else {
    border-left: $y+rem solid transparent;
    border-right: none;
  }
}

@mixin triangle($direction: "top", $len: 1, $side1: 1, $side2: 1, $color: red) {
  height: 0;
  width: 0;
  @if $direction == "top" {
    border-bottom: $len+rem solid $color;
    border-left: $side1+rem solid transparent;
    border-right: $side2+rem solid transparent;
    border-top: none;
  }
  @else if $direction == "bottom" {
    border-bottom: none;
    border-left: $side1+rem solid transparent;
    border-right: $side2+rem solid transparent;
    border-top: $len+rem solid $color;
  }
  @else if $direction == "left" {
    border-bottom: $side2+rem solid transparent;
    border-left: none;
    border-right: $len+rem solid $color;
    border-top: $side1+rem solid transparent;
  }
  @else if $direction == "right" {
    border-bottom: $side2+rem solid transparent;
    border-left: $len+rem solid $color;
    border-right: none;
    border-top: $side1+rem solid transparent;
  }
}
/* end mixins */

* {
  &, &:before, &:after, &:focus, &:active, &:focus:active {
    box-sizing: border-box;
  }
}
html {
  cursor: none;
  font-size: 20px;
}

kbd {
  background: black;
  border-radius: 3px;
  color: white;
  display: inline-block;
  font-family: menlo, sans-serif;
  font-size: 8px;
  height: 15px;
  line-height: 15px;
  min-width: 15px;
  padding: 0 5px;
  text-align: center;
}

#guide {
  background: darkgray;
  color: white;
  font-size: 10px;
  left: 0;
  position: fixed;
  text-align: center;
  top: 0;
  width: 100%;
  p {
    margin: 4px 0;
    line-height: 1;
  }
}
#controls {
  background: rgba(white, .9);
  border: 1px solid darkgray;
  font-size: 10px;
  left: -100%;
  padding: 0 5px 0 0;
  position: fixed;
  top: 36px;
  transition: left .5s ease-in-out;
  &.open {
    left: 0;
  }
  span {
    display: inline-block;
    min-width: 40px;
    text-align: center;
  }
}

#environment {
  background: #222;
  height: 100vh;
  position: absolute;
  width: 100vw;
  z-index: -1;
  .dust {
    animation: dust .9s infinite ease-in;
    background: rgba(lightgray, .5);
    border-radius: 50%;
    box-shadow: 0 0 .5rem 0 rgba(gray, .5);
    height: .25rem;
    position: fixed;
    width: .25rem;
  }
}

#ship {
  bottom: 2rem;
  display: block;
  height: 6rem;
  left: 50%;
  position: fixed;
  transform: translateX(-50%);
  width: 5rem;
  &.boost {
    &:not(.closed) {
      .hull {
        .thrust {
          animation: boosted .05s linear infinite alternate;
          @include triangle("bottom", 2, .25, .25, cyan);
          bottom: -.8rem;
          transition: all .5s ease-in-out;
          &:before {
            animation: boosted .06s linear infinite alternate;
            @include triangle("bottom", 1.4, .2, .2, deepskyblue);
            top: -2rem;
          }
          &:after {
            animation: boosted .07s linear infinite;
            @include triangle("bottom", .8, .1, .1, dodgerblue);
            top: -2rem;
          }
        }
      }
      .wings {
        transition: all .3s ease-in-out;
        .left {
          top: 1.5rem;
          &:after {
            top: calc(50% - .7rem);
            transform: skewY(-30deg);
            transform-origin: top right;
          }
        }
        .right {
          top: 1.5rem;
          &:after {
            top: calc(50% - .7rem);
            transform: skewY(30deg);
            transform-origin: top left;
          }
        }
      }
    }
  }
  &.closed {
    .wings {
      .left,
      .right {
        top: .6rem;
        &:after {
          width: .8rem;
        }        
      }
      .left {
        left: calc(50% - 1.5rem);
      }
      .right {
        right: calc(50% - 1.5rem);
      }
    }
  }
  .hull {
    .left, .right {
      position: absolute;
      left: 50%;
    }
    .left {
      border-radius: 0 0 0 100%;
      @include rightTriangle("bottom", 1, "right", 5, gray);
      transform: translateX(-1.2rem);
      width: 1.2rem;
    }
    .right {
      border-radius: 0 0 100%;
      @include rightTriangle("bottom", 1, "left", 5, gray);
      width: 1.2rem;
    }
    .cockpit {
      background: cyan;
      border-radius: 100% / 80%;
      box-shadow:
        inset .06rem 0 0 .06rem cyan,
        inset 0 -.06rem 0 .06rem cyan,
        inset .12rem -.12rem 0 .06rem white
        ;
      height: 1.8rem;
      left: 50%;
      position: absolute;
      top: 2.4rem;
      transform: translateX(-50%);
      width: .8rem;
    }
    .thrust {
      animation: thrust .07s linear infinite alternate;
      @include triangle("bottom", 1, .25, .25, darkorange);
      bottom: .2rem;
      left: 50%;
      position: absolute;
      transform: translateX(-50%);
      z-index: 0;
      &:before,
      &:after {
        animation: thrust linear infinite alternate;
        content: "";
        left: 50%;
        position: absolute;
        top: -1rem;
        transform: translateX(-50%);
      }
      &:before {
        animation-direction: reverse;
        animation-duration: .09s;
        @include triangle("bottom", .8, .2, .2, mix(orange, gold));
      }
      &:after {
        animation-duration: .11s;
        @include triangle("bottom", .4, .1, .1, gold);
      }
    }
  }
  .wings {
    .left,
    .right {
      bottom: 1.4rem;
      position: absolute;
      transition: all .65s ease-in;
      z-index: -1;
      &:before,
      &:after {
        transition: all .65s ease-in;
      }
    }
    .left,
    .right {
      top: .8rem;
      &:before {
        content: "";
        position: absolute;
        top: -2.1rem;
      }
      &:after {
        background: silver;
        box-shadow: 0 .7rem 0 0 silver;
        content: "";
        height: .2rem;
        position: absolute;
        top: 50%;
        width: 1.3rem;
      }
    }
    .left {
      @include triangle("left", 1.5, 1.5, 1, silver);
      border-radius: 100% 0 0 0;
      height: 4rem;
      left: calc(50% - 2.5rem);
      transform-origin: top right;
      &:before {
        border-radius: 0 0 0 100%;
        @include rightTriangle("bottom", 1, "right", 5, #222);
        left: .3rem;
        width: 1.2rem;
      }
      &:after {
        left: .5rem;
        transform: rotate(-12deg);
      }
    }
    .right {
      @include triangle("right", 1.5, 1.5, 1, silver);
      border-radius: 0 100% 0 0;
      height: 4rem;
      right: calc(50% - 2.5rem);
      transform-origin: top left;
      &:before {
        border-radius: 0 0 100% 0;
        @include rightTriangle("bottom", 1, "left", 5, #222);
        right: .3rem;
        width: 1.2rem;
      }
      &:after {
        right: .5rem;
        transform: rotate(12deg);
      }
    }
  }
}

#ship:not(.boost):not(.closed) {
  + #environment {
    
    .bullet {
      position: fixed;
      transform: scale(.7);
      &.type1 {
        animation: bullet .5s ease-in;
        background: gold;
        border-radius: 50%;
        box-shadow: 0 .3rem .2rem 0 orange;
        height: 1rem;
        width: .2rem;
      }
      &.type2 {
        animation: bullet .5s ease-in;
        background: gold;
        border-radius: 50%;
        box-shadow: 0 .3rem .2rem 0 orange;
        height: 1rem;
        width: .5rem;
      }
      &.type3,
      &.type4 {
        animation: bullet .5s ease-in;
        background: lawngreen;
        border-radius: 50%;
        box-shadow: 0 .3rem .2rem 0 yellow;
        height: 3.6rem;
        width: .2rem;
      }
      &.type4 {
        &:before,
        &:after {
          animation: bullet .5s ease-in;
          background: gold;
          border-radius: 50%;
          box-shadow: 0 .4rem .2rem -.1rem orange;
          height: .4rem;
          width: .3rem;
        }
        &:before,
        &:after {
          content: "";
          position: absolute;
          top: 1rem;
        }
        &:before {
          left: 1rem;
        }
        &:after {
          right: 1rem;
        }
      }
      &.type5 {
        &,
        &:before,
        &:after {
          animation: bullet .5s ease-in;
          background: lawngreen;
          border-radius: 50%;
          box-shadow: 0 .3rem .2rem 0 yellow;
          height: 3.6rem;
          transform: scaleX(.5);
          width: .2rem;
        }
        &:before,
        &:after {
          content: "";
          position: absolute;
          top: 1rem;
        }
        &:before {
          left: 1rem;
        }
        &:after {
          right: 1rem;
        }
      }
      &.type6 {
        animation: bullet .5s ease-in;
        background: deepskyblue;
        border-radius: 50% 50% 0 0 / 100% 100% 0 0;
        box-shadow: 0 .2rem .3rem -.06rem darkviolet;
        height: 2rem;
        transform: scaleX(.6);
        width: .5rem;
      }
      &.type7 {
        animation: bullet .5s ease-in;
        background: orangered;
        border-radius: 50%;
        box-shadow: 0 .06rem .3rem -.06rem orange, 0 .36rem .3rem -.1rem gold;
        height: .4rem;
        transform: scaleX(.5);
        width: 1rem;
        &:before,
        &:after {
          animation: bulletSpreadLeftNarrow .5s ease-in;
          background: orangered;
          border-radius: 50%;
          box-shadow: 0 .06rem .3rem -.06rem orange, 0 .36rem .3rem -.1rem gold;
          content: "";
          height: .3rem;
          position: absolute;
          top: 1rem;
          transform: scaleX(.5);
          width: .9rem;
        }
        &:before {
          left: -1rem;
        }
        &:after {
          animation: bulletSpreadRightNarrow .5s ease-in;
          right: -1rem;
        }
      }
      &.type8 {
        animation: bullet .5s ease-in;
        background: orangered;
        border-radius: 50%;
        box-shadow: 0 .06rem .3rem -.06rem orange, 0 .36rem .3rem -.1rem gold;
        height: .4rem;
        transform: scaleX(.5);
        width: 1.4rem;
        &:before,
        &:after {
          animation: bulletSpreadLeftWide .5s ease-in;
          background: orangered;
          border-radius: 50%;
          box-shadow: 0 .06rem .3rem -.06rem orange, 0 .36rem .3rem -.1rem gold;
          content: "";
          height: .3rem;
          position: absolute;
          top: 1rem;
          transform: scaleX(.5);
          width: 1.4rem;
        }
        &:before {
          left: -1rem;
        }
        &:after {
          animation: bulletSpreadRightWide .5s ease-in;
          right: -1rem;
        }
      }
      &.type9 {
        animation: bullet .5s ease-in;
        background: deepskyblue;
        border-radius: 50%;
        box-shadow: 0 .2rem .3rem -.06rem dodgerblue;
        height: 4rem;
        transform: scaleX(.3);
        width: 1.2rem;
      }
    }
  }
}

@keyframes thrust {
  from {
    transform-origin: top center;
    transform: skewX(4deg) translateX(-50%);
  }
  to {
    transform-origin: top center;
    transform: skewX(-4deg) translateX(-50%);
  }
}
@keyframes boosted {
  from {
    transform-origin: top center;
    transform: skewX(1deg) translateX(-50%);
  }
  to {
    transform-origin: top center;
    transform: skewX(-1deg) translateX(-50%);
  }
}

@keyframes bullet {
  to {
    top: 0;
    transform: scale(1);
  }
}
@keyframes bulletSpreadLeftNarrow {
  to {
    top: 0;
    transform: scale(1) translateX(-4rem);
  }
}
@keyframes bulletSpreadLeftWide {
  to {
    top: 0;
    transform: scale(1) translateX(-10rem);
  }
}
@keyframes bulletSpreadRightNarrow {
  to {
    top: 0;
    transform: scale(1) translateX(4rem);
  }
}
@keyframes bulletSpreadRightWide {
  to {
    top: 0;
    transform: scale(1) translateX(10rem);
  }
}
@keyframes dust {
  from {
    top: -50%;
  }
  to {
    top: 150%;
  }
}

var $ship = $('#ship'),
    posX,
    posY,
    shipSpeed = 1900,
    bulletType = 1,
    bulletSpeed = 350,
    fireRate = 150,
    keys = {},
    prevGameTime = new Date().getTime();

addDust(20);

$(window)
  .keydown(function(e) { keys[e.which] = true; })
  .keyup(function(e) { keys[e.which] = false; })
  .on('keydown', function(event) {
    
    if (keys[84]) { // t = toggle controls
      $('#controls').toggleClass("open");
    }
  
    if (keys[32]) { // space = fire
      var gameTime = new Date().getTime();
      if ((gameTime - prevGameTime) > fireRate) {
        shoot();
        prevGameTime = gameTime;
      }
    }
    
    if (keys[68]) { // d = wings
      $ship.toggleClass("closed");
      if ($ship.hasClass("closed")) {
        changeSpeed(1500);
      }
      else {
        changeSpeed();
      }
    }
  
    if (keys[70]) { // f = boost
      if (!$ship.hasClass("closed")) {
        $ship.addClass("boost");
        changeSpeed(1000);
        setTimeout(function() {
          $ship.removeClass("boost");
          changeSpeed();
        }, 2000);
      }
    }
  
    if (keys[83]) { // s = next weapon
      changeBullet();
    }
    if (keys[49]) { // weapon 1
      changeBullet(1);
    }
    if (keys[50]) { // weapon 2
      changeBullet(2);
    }
    if (keys[51]) { // weapon 3
      changeBullet(3);
    }
    if (keys[52]) { // weapon 4
      changeBullet(4);
    }
    if (keys[53]) { // weapon 5
      changeBullet(5);
    }
    if (keys[54]) { // weapon 6
      changeBullet(6);
    }
    if (keys[55]) { // weapon 7
      changeBullet(7);
    }
    if (keys[56]) { // weapon 8
      changeBullet(8);
    }
    if (keys[57]) { // weapon 9
      changeBullet(9);
    }
  })
  .on('mousemove', function(event) {
    posX = (event.clientX),
    posY = (event.clientY - ($ship.height() / 2));
    $ship.css({
      left: posX,
      top: posY
    });
  })
;

function changeBullet(x) {
  if (x) {
    bulletType = x;
  }
  else {
    if (bulletType < 9) {
      bulletType += 1;
    }
  }
  switch (bulletType) {
    case 1: 
      fireRate = 350;
      break;
    case 2:
      fireRate = 300;
      break;
    case 3:
      fireRate = 200;
      break;
    case 4:
      fireRate = 150;
      break;
    case 5:
      fireRate = 150;
      break;
    case 6:
      fireRate = 125;
      break;
    case 7:
      fireRate = 300;
      break;
    case 8:
      fireRate = 200;
      break;
    case 9:
      fireRate = 10;
      break;
    default:
      fireRate = 350;
      break;
  }
}

function shoot() {
  var $bullet = $('<div class="bullet type' + bulletType + '"></div>');
  $bullet.appendTo($('#environment'));
  $bullet
    .css({
      left: posX - ($bullet.width() / 2),
      top: posY
    })
    .animate({
      top: 0
    }, bulletSpeed)
  ;
  setTimeout(function(event) {
    $bullet.remove();
  }, bulletSpeed);
}

function addDust(x) {
  for (i = 0; i <= x; i++) {
    var $particle = $('<div class="dust"></div>'),
        pos = Math.floor(Math.random() * $(window).width()),
        delay = Math.random() * 2000;
    console.log(delay);
    $particle
      .css({
        animationDelay: delay + "ms",
        animationDuration: shipSpeed,
        left: pos
      })
      .appendTo('#environment');
    ;
    changeSpeed();
  }
}

function changeSpeed(x) {
  shipSpeed = "1900ms";
  if (x) {
    shipSpeed = x + "ms";
  }
  $('div.dust').css({
    animationDuration: shipSpeed
  });
}