import {
  createSizedArray,
} from './helpers/arrays';

let subframeEnabled = true;
let expressionsPlugin = null;
let expressionsInterfaces = null;
let idPrefix = '';
const isSafari = /^((?!chrome|android).)*safari/i.test(navigator.userAgent);
let _shouldRoundValues = false;
const bmPow = Math.pow;
const bmSqrt = Math.sqrt;
const bmFloor = Math.floor;
const bmMax = Math.max;
const bmMin = Math.min;

const BMMath = {};
(function () {
  var propertyNames = ['abs', 'acos', 'acosh', 'asin', 'asinh', 'atan', 'atanh', 'atan2', 'ceil', 'cbrt', 'expm1', 'clz32', 'cos', 'cosh', 'exp', 'floor', 'fround', 'hypot', 'imul', 'log', 'log1p', 'log2', 'log10', 'max', 'min', 'pow', 'random', 'round', 'sign', 'sin', 'sinh', 'sqrt', 'tan', 'tanh', 'trunc', 'E', 'LN10', 'LN2', 'LOG10E', 'LOG2E', 'PI', 'SQRT1_2', 'SQRT2'];
  var i;
  var len = propertyNames.length;
  for (i = 0; i < len; i += 1) {
    BMMath[propertyNames[i]] = Math[propertyNames[i]];
  }
}());

function ProjectInterface() { return {}; }
BMMath.random = Math.random;
BMMath.abs = function (val) {
  var tOfVal = typeof val;
  if (tOfVal === 'object' && val.length) {
    var absArr = createSizedArray(val.length);
    var i;
    var len = val.length;
    for (i = 0; i < len; i += 1) {
      absArr[i] = Math.abs(val[i]);
    }
    return absArr;
  }
  return Math.abs(val);
};
let defaultCurveSegments = 150;
const degToRads = Math.PI / 180;
const roundCorner = 0.5519;

function roundValues(flag) {
  _shouldRoundValues = !!flag;
}

function bmRnd(value) {
  if (_shouldRoundValues) {
    return Math.round(value);
  }
  return value;
}

function styleDiv(element) {
  element.style.position = 'absolute';
  element.style.top = 0;
  element.style.left = 0;
  element.style.display = 'block';
  element.style.transformOrigin = '0 0';
  element.style.webkitTransformOrigin = '0 0';
  element.style.backfaceVisibility = 'visible';
  element.style.webkitBackfaceVisibility = 'visible';
  element.style.transformStyle = 'preserve-3d';
  element.style.webkitTransformStyle = 'preserve-3d';
  element.style.mozTransformStyle = 'preserve-3d';
}

function BMEnterFrameEvent(type, currentTime, totalTime, frameMultiplier) {
  this.type = type;
  this.currentTime = currentTime;
  this.totalTime = totalTime;
  this.direction = frameMultiplier < 0 ? -1 : 1;
}

function BMCompleteEvent(type, frameMultiplier) {
  this.type = type;
  this.direction = frameMultiplier < 0 ? -1 : 1;
}

function BMCompleteLoopEvent(type, totalLoops, currentLoop, frameMultiplier) {
  this.type = type;
  this.currentLoop = currentLoop;
  this.totalLoops = totalLoops;
  this.direction = frameMultiplier < 0 ? -1 : 1;
}

function BMSegmentStartEvent(type, firstFrame, totalFrames) {
  this.type = type;
  this.firstFrame = firstFrame;
  this.totalFrames = totalFrames;
}

function BMDestroyEvent(type, target) {
  this.type = type;
  this.target = target;
}

function BMRenderFrameErrorEvent(nativeError, currentTime) {
  this.type = 'renderFrameError';
  this.nativeError = nativeError;
  this.currentTime = currentTime;
}

function BMConfigErrorEvent(nativeError) {
  this.type = 'configError';
  this.nativeError = nativeError;
}

function BMAnimationConfigErrorEvent(type, nativeError) {
  this.type = type;
  this.nativeError = nativeError;
}

const createElementID = (function () {
  var _count = 0;
  return function createID() {
    _count += 1;
    return idPrefix + '__lottie_element_' + _count;
  };
}());

function HSVtoRGB(h, s, v) {
  var r;
  var g;
  var b;
  var i;
  var f;
  var p;
  var q;
  var t;
  i = Math.floor(h * 6);
  f = h * 6 - i;
  p = v * (1 - s);
  q = v * (1 - f * s);
  t = v * (1 - (1 - f) * s);
  switch (i % 6) {
    case 0: r = v; g = t; b = p; break;
    case 1: r = q; g = v; b = p; break;
    case 2: r = p; g = v; b = t; break;
    case 3: r = p; g = q; b = v; break;
    case 4: r = t; g = p; b = v; break;
    case 5: r = v; g = p; b = q; break;
    default: break;
  }
  return [r,
    g,
    b];
}

function RGBtoHSV(r, g, b) {
  var max = Math.max(r, g, b);
  var min = Math.min(r, g, b);
  var d = max - min;
  var h;
  var s = (max === 0 ? 0 : d / max);
  var v = max / 255;

  switch (max) {
    case min: h = 0; break;
    case r: h = (g - b) + d * (g < b ? 6 : 0); h /= 6 * d; break;
    case g: h = (b - r) + d * 2; h /= 6 * d; break;
    case b: h = (r - g) + d * 4; h /= 6 * d; break;
    default: break;
  }

  return [
    h,
    s,
    v,
  ];
}

function addSaturationToRGB(color, offset) {
  var hsv = RGBtoHSV(color[0] * 255, color[1] * 255, color[2] * 255);
  hsv[1] += offset;
  if (hsv[1] > 1) {
    hsv[1] = 1;
  } else if (hsv[1] <= 0) {
    hsv[1] = 0;
  }
  return HSVtoRGB(hsv[0], hsv[1], hsv[2]);
}

function addBrightnessToRGB(color, offset) {
  var hsv = RGBtoHSV(color[0] * 255, color[1] * 255, color[2] * 255);
  hsv[2] += offset;
  if (hsv[2] > 1) {
    hsv[2] = 1;
  } else if (hsv[2] < 0) {
    hsv[2] = 0;
  }
  return HSVtoRGB(hsv[0], hsv[1], hsv[2]);
}

function addHueToRGB(color, offset) {
  var hsv = RGBtoHSV(color[0] * 255, color[1] * 255, color[2] * 255);
  hsv[0] += offset / 360;
  if (hsv[0] > 1) {
    hsv[0] -= 1;
  } else if (hsv[0] < 0) {
    hsv[0] += 1;
  }
  return HSVtoRGB(hsv[0], hsv[1], hsv[2]);
}

const rgbToHex = (function () {
  var colorMap = [];
  var i;
  var hex;
  for (i = 0; i < 256; i += 1) {
    hex = i.toString(16);
    colorMap[i] = hex.length === 1 ? '0' + hex : hex;
  }

  return function (r, g, b) {
    if (r < 0) {
      r = 0;
    }
    if (g < 0) {
      g = 0;
    }
    if (b < 0) {
      b = 0;
    }
    return '#' + colorMap[r] + colorMap[g] + colorMap[b];
  };
}());

const setSubframeEnabled = (flag) => { subframeEnabled = !!flag; };
const getSubframeEnabled = () => subframeEnabled;
const setExpressionsPlugin = (value) => { expressionsPlugin = value; };
const getExpressionsPlugin = () => expressionsPlugin;
const setExpressionInterfaces = (value) => { expressionsInterfaces = value; };
const getExpressionInterfaces = () => expressionsInterfaces;
const setDefaultCurveSegments = (value) => { defaultCurveSegments = value; };
const getDefaultCurveSegments = () => defaultCurveSegments;
const setIdPrefix = (value) => { idPrefix = value; };
const getIdPrefix = () => idPrefix;

export {
  setSubframeEnabled,
  getSubframeEnabled,
  setExpressionsPlugin,
  getExpressionsPlugin,
  setExpressionInterfaces,
  getExpressionInterfaces,
  setDefaultCurveSegments,
  getDefaultCurveSegments,
  isSafari,
  bmPow,
  bmSqrt,
  bmFloor,
  bmMax,
  bmMin,
  degToRads,
  roundCorner,
  styleDiv,
  bmRnd,
  roundValues,
  BMEnterFrameEvent,
  BMCompleteEvent,
  BMCompleteLoopEvent,
  BMSegmentStartEvent,
  BMDestroyEvent,
  BMRenderFrameErrorEvent,
  BMConfigErrorEvent,
  BMAnimationConfigErrorEvent,
  createElementID,
  addSaturationToRGB,
  addBrightnessToRGB,
  addHueToRGB,
  rgbToHex,
  setIdPrefix,
  getIdPrefix,
  BMMath,
  ProjectInterface,
};