let themesList = null;
async function getThemesList() {
  if (themesList == null) {
    return $.getJSON("themes/list.json", function (data) {
      themesList = data.sort(function (a, b) {
        (nameA = a.name.toLowerCase()), (nameB = b.name.toLowerCase());
        if (nameA < nameB) return -1;
        if (nameA > nameB) return 1;
        return 0;
      });
      return themesList;
    });
  } else {
    return themesList;
  }
}

let funboxList = null;
async function getFunboxList() {
  if (funboxList == null) {
    return $.getJSON("funbox/list.json", function (data) {
      funboxList = data.sort(function (a, b) {
        (nameA = a.name.toLowerCase()), (nameB = b.name.toLowerCase());
        if (nameA < nameB) return -1;
        if (nameA > nameB) return 1;
        return 0;
      });
      return funboxList;
    });
  } else {
    return funboxList;
  }
}

let fontsList = null;
async function getFontsList() {
  if (fontsList == null) {
    return $.getJSON("js/fonts.json", function (data) {
      fontsList = data.sort(function (a, b) {
        (nameA = a.name.toLowerCase()), (nameB = b.name.toLowerCase());
        if (nameA < nameB) return -1;
        if (nameA > nameB) return 1;
        return 0;
      });
      return fontsList;
    });
  } else {
    return fontsList;
  }
}

function smooth(arr, windowSize, getter = (value) => value, setter) {
  const get = getter;
  const result = [];

  for (let i = 0; i < arr.length; i += 1) {
    const leftOffeset = i - windowSize;
    const from = leftOffeset >= 0 ? leftOffeset : 0;
    const to = i + windowSize + 1;

    let count = 0;
    let sum = 0;
    for (let j = from; j < to && j < arr.length; j += 1) {
      sum += get(arr[j]);
      count += 1;
    }

    result[i] = setter ? setter(arr[i], sum / count) : sum / count;
  }

  return result;
}

function stdDev(array) {
  try {
    const n = array.length;
    const mean = array.reduce((a, b) => a + b) / n;
    return Math.sqrt(
      array.map((x) => Math.pow(x - mean, 2)).reduce((a, b) => a + b) / n
    );
  } catch (e) {
    return 0;
  }
}

function mean(array) {
  try {
    return (
      array.reduce((previous, current) => (current += previous)) / array.length
    );
  } catch (e) {
    return 0;
  }
}

function showNotification(text, time) {
  let noti = $(".notification");
  noti.text(text);
  noti.css("top", `-${noti.outerHeight()}px`);
  noti.stop(true, true).animate(
    {
      top: "1rem",
    },
    250,
    "swing",
    () => {
      noti.stop(true, true).animate(
        {
          opacity: 1,
        },
        time,
        () => {
          noti.stop(true, true).animate(
            {
              top: `-${noti.outerHeight()}px`,
            },
            250,
            "swing"
          );
        }
      );
    }
  );
}

function getReleasesFromGitHub() {
  $.getJSON(
    "https://api.github.com/repos/Miodec/monkey-type/releases",
    (data) => {
      $("#bottom .version").text(data[0].name).css("opacity", 1);
      $("#versionHistory .releases").empty();
      data.forEach((release) => {
        if (!release.draft && !release.prerelease) {
          $("#versionHistory .releases").append(`
          <div class="release">
            <div class="title">${release.name}</div>
            <div class="date">${moment(release.published_at).format(
              "DD MMM YYYY"
            )}</div>
            <div class="body">${release.body.replace(/\r\n/g, "<br>")}</div>
          </div>
        `);
        }
      });
    }
  );
}

function getLastChar(word) {
  return word.charAt(word.length - 1);
}

function capitalizeFirstLetter(str) {
  return str.charAt(0).toUpperCase() + str.slice(1);
}

function kogasa(cov) {
  return (
    100 * (1 - Math.tanh(cov + Math.pow(cov, 3) / 3 + Math.pow(cov, 5) / 5))
  );
}

function hexToHSL(H) {
  // Convert hex to RGB first
  let r = 0,
    g = 0,
    b = 0;
  if (H.length == 4) {
    r = "0x" + H[1] + H[1];
    g = "0x" + H[2] + H[2];
    b = "0x" + H[3] + H[3];
  } else if (H.length == 7) {
    r = "0x" + H[1] + H[2];
    g = "0x" + H[3] + H[4];
    b = "0x" + H[5] + H[6];
  }
  // Then to HSL
  r /= 255;
  g /= 255;
  b /= 255;
  let cmin = Math.min(r, g, b),
    cmax = Math.max(r, g, b),
    delta = cmax - cmin,
    h = 0,
    s = 0,
    l = 0;

  if (delta == 0) h = 0;
  else if (cmax == r) h = ((g - b) / delta) % 6;
  else if (cmax == g) h = (b - r) / delta + 2;
  else h = (r - g) / delta + 4;

  h = Math.round(h * 60);

  if (h < 0) h += 360;

  l = (cmax + cmin) / 2;
  s = delta == 0 ? 0 : delta / (1 - Math.abs(2 * l - 1));
  s = +(s * 100).toFixed(1);
  l = +(l * 100).toFixed(1);

  return {
    hue: h,
    sat: s,
    lgt: l,
    string: "hsl(" + h + "," + s + "%," + l + "%)",
  };
}

function roundTo2(num) {
  return Math.round((num + Number.EPSILON) * 100) / 100;
}

function findLineByLeastSquares(values_y) {
  var sum_x = 0;
  var sum_y = 0;
  var sum_xy = 0;
  var sum_xx = 0;
  var count = 0;

  /*
   * We'll use those variables for faster read/write access.
   */
  var x = 0;
  var y = 0;
  var values_length = values_y.length;

  /*
   * Nothing to do.
   */
  if (values_length === 0) {
    return [[], []];
  }

  /*
   * Calculate the sum for each of the parts necessary.
   */
  for (var v = 0; v < values_length; v++) {
    x = v + 1;
    y = values_y[v];
    sum_x += x;
    sum_y += y;
    sum_xx += x * x;
    sum_xy += x * y;
    count++;
  }

  /*
   * Calculate m and b for the formular:
   * y = x * m + b
   */
  var m = (count * sum_xy - sum_x * sum_y) / (count * sum_xx - sum_x * sum_x);
  var b = sum_y / count - (m * sum_x) / count;

  var returnpoint1 = [1, 1 * m + b];
  var returnpoint2 = [values_length, values_length * m + b];
  return [returnpoint1, returnpoint2];
}

function calculateSlope([[x1, y1], [x2, y2]]) {
  return (y1 - y2) / (x1 - x2);
}

function getGibberish() {
  let randLen = Math.floor(Math.random() * 7) + 1;
  let ret = "";
  for (let i = 0; i < randLen; i++) {
    ret += String.fromCharCode(97 + Math.floor(Math.random() * 26));
  }
  return ret;
}

function secondsToString(sec) {
  hours = Math.floor(sec / 3600);
  minutes = Math.floor((sec % 3600) / 60);
  seconds = (sec % 3600) % 60;
  let hoursString;
  let minutesString;
  let secondsString;
  hours < 10 ? (hoursString = "0" + hours) : (hoursString = hours);
  minutes < 10 ? (minutesString = "0" + minutes) : (minutesString = minutes);
  seconds < 10 && (minutes > 0 || hours > 0)
    ? (secondsString = "0" + seconds)
    : (secondsString = seconds);

  let ret = "";
  if (hours > 0) ret += hoursString + ":";
  if (minutes > 0 || hours > 0) ret += minutesString + ":";
  ret += secondsString;
  return ret;
}

function getNumbers() {
  let randLen = Math.floor(Math.random() * 7) + 1;
  let ret = "";
  for (let i = 0; i < randLen; i++) {
    randomNum = Math.floor(Math.random() * 9) + 1;
    ret += randomNum.toString();
  }
  return ret;
}

function getSpecials() {
  let randLen = Math.floor(Math.random() * 7) + 1;
  let ret = "";
  let specials = [
    "!",
    "@",
    "#",
    "$",
    "%",
    "^",
    "&",
    "*",
    "(",
    ")",
    "-",
    "_",
    "=",
    "+",
  ];
  for (let i = 0; i < randLen; i++) {
    ret += specials[Math.floor(Math.random() * specials.length)];
  }
  return ret;
}