export namespace drandom {
  export function getRandomString() {
    var letters = "0123456789ABCDEF";
    var color = "";
    for (var i = 0; i < 6; i++) {
      color += letters[Math.floor(Math.random() * 16)];
    }
    return color;
  }

  export function getRandomId(length: number = 6) {
    var letters = "0123456789abcdefghijklmnopqrstuvwxyz";
    var color = "";
    for (var i = 0; i < length; i++) {
      color += letters[Math.floor(Math.random() * 32)];
    }
    return color;
  }

  export function getRandomColor() {
    var letters = "0123456789ABCDEF";
    var color = "#";
    for (var i = 0; i < 6; i++) {
      color += letters[Math.floor(Math.random() * 16)];
    }
    return color;
  }

  // return ID like BBDD-7656
  export function generateFriendlyId() {
    var letters = "0123456789ABCDEF";
    var fid = "";
    for (var i = 0; i < 8; i++) {
      fid += letters[Math.floor(Math.random() * 16)];
      if (i == 3) {
        fid += "-";
      }
    }
    return fid;
  }

  export function getRandomColorList(size: number = 10) {
    let result = [];
    for (let i = 0; i < size; i++) {
      result.push(getRandomColor());
    }
    return result;
  }

  export function getRandomCapString(len = 10) {
    var letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    var color = "";
    for (var i = 0; i < len; i++) {
      color += letters[Math.floor(Math.random() * 25)];
    }
    return color;
  }
}