/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass(ele: HTMLElement, cls: string) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass(ele: HTMLElement, cls: string) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls;
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass(ele: HTMLElement, cls: string) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');
    ele.className = ele.className.replace(reg, ' ');
  }
}

export function mix(color1: string, color2: string, weight: number) {
  weight = Math.max(Math.min(Number(weight), 1), 0);
  const r1 = parseInt(color1.substring(1, 3), 16);
  const g1 = parseInt(color1.substring(3, 5), 16);
  const b1 = parseInt(color1.substring(5, 7), 16);
  const r2 = parseInt(color2.substring(1, 3), 16);
  const g2 = parseInt(color2.substring(3, 5), 16);
  const b2 = parseInt(color2.substring(5, 7), 16);
  const r = Math.round(r1 * (1 - weight) + r2 * weight);
  const g = Math.round(g1 * (1 - weight) + g2 * weight);
  const b = Math.round(b1 * (1 - weight) + b2 * weight);
  const rStr = ('0' + (r || 0).toString(16)).slice(-2);
  const gStr = ('0' + (g || 0).toString(16)).slice(-2);
  const bStr = ('0' + (b || 0).toString(16)).slice(-2);
  return '#' + rStr + gStr + bStr;
}

export function parseTime(time :any, cFormat :any) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'undefined' || time === null || time === 'null') {
    return ''
  } else if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result :any, key :any) => {
    let value : any = formatObj[key]
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value ] }
    if (result.length > 0 && value < 10) {
      value = '0' + value
    }
    return value || 0
  })
  return time_str
}
export function downloadFile(obj :any, name :any, suffix :any) {
  const url = window.URL.createObjectURL(new Blob([obj]))
  const link = document.createElement('a')
  link.style.display = 'none'
  link.href = url
  const fileName = parseTime(new Date(),'') + '-' + name + '.' + suffix
  link.setAttribute('download', fileName)
  document.body.appendChild(link)
  link.click()
  document.body.removeChild(link)
}