export function capitalizeFirstLetter(string: string | null = "") {
  if (string === null) {
    return "";
  }
  return string.charAt(0).toUpperCase() + string.slice(1);
}

// write a function that takes a string and truncates it to the specified length
export const truncate = (str: string, length: number) => {
  if (!str) return "";
  if (str.length > length) {
    return str.substring(0, length) + "...";
  }
  return str;
};

// write a function that takes a string and truncates the middle of it so that the beginning and ending are always visible
export const truncateMiddle = (str: string, length: number) => {
  if (!str) return "";
  if (str.length > length) {
    const start = str.substring(0, length / 2);
    const end = str.substring(str.length - length / 2, str.length);
    return start + " ... " + end;
  }
  return str;
};

export const scrollToTop = () => {
  window.scrollTo({
    top: 0,
    behavior: "smooth",
  });
};

export function isLight(color) {
  let r, g, b;
  if (color.length === 4) {
    r = parseInt(color[1] + color[1], 16);
    g = parseInt(color[2] + color[2], 16);
    b = parseInt(color[3] + color[3], 16);
  } else if (color.length === 7) {
    r = parseInt(color[1] + color[2], 16);
    g = parseInt(color[3] + color[4], 16);
    b = parseInt(color[5] + color[6], 16);
  }
  return r * 0.299 + g * 0.587 + b * 0.114 > 128;
}

const shuffle = (array: any[]) => {
  for (let i = 0; i < array.length; i++) {
    const j = Math.floor(Math.random() * (i + 1));
    [array[i], array[j]] = [array[j], array[i]];
  }
};

export const shuffleArray = (array: any[], shuffleOption: string | undefined) => {
  const arrayCopy = [...array];
  const otherIndex = arrayCopy.findIndex((element) => element.id === "other");
  const otherElement = otherIndex !== -1 ? arrayCopy.splice(otherIndex, 1)[0] : null;

  if (shuffleOption === "all") {
    shuffle(arrayCopy);
  } else if (shuffleOption === "exceptLast") {
    const lastElement = arrayCopy.pop();
    shuffle(arrayCopy);
    arrayCopy.push(lastElement);
  }

  if (otherElement) {
    arrayCopy.push(otherElement);
  }

  return arrayCopy;
};