import { removeImgQuery } from './imgResize'

/**
 * 将value保留到小数点后count位，并去除末尾多余的0
 * @param {number} value 想要被截取的数字
 * @param {number} count 想要被截取的小数点后的位数
 */
const format = (value, count) => {
  var suffix = value.toFixed(count).split('.')[1];

  let i = suffix.length - 1;
  let adjustedCount = count;

  while (i >= 0) {
    if (suffix[i] === '0') {
      adjustedCount--;
    } else {
      break;
    }

    i--;
  }

  return value.toFixed(adjustedCount);
};
/**
 * 将数值格式化为交互约定的数值，999，1.5万，3.22亿等
 * @param {number} num 想要被格式化的数值
 */
export const formatNumber = (num) => {
  if (typeof num !== 'number'){
    return 'NaN'
  }
  if (num < 10000) {
    return num.toString();
  }

  let value;
  let baseValue;

  if (num < 100000000) {
    // 大于99999950显示一亿
    if (num >= 99999950) {
      return '1亿';
    }

    value = num / 10000;
    baseValue = Math.round(value);

    return (baseValue > value ? baseValue : format(value, 1)) + '万';
  }

  value = num / 100000000;
  baseValue = Math.round(value);

  return (baseValue > value ? baseValue : format(value, 2)) + '亿';
};

export const padding = (value) => {
    value = value + '';
    if (value.length === 1) {
        return '0' + value;
    }

    return value;
}

/**
 * 将时间戳格式化为交互规定的时间显示格式，1分钟内显示刚刚，1小时内多少分钟前等
 * @param {number} timestamp 时间戳
 */
export const formatTime = (timestamp) => {
  const nowDate = new Date();
  const now = nowDate.getTime();

  timestamp = /\d+/.test(timestamp) ? parseInt(timestamp, 10) : timestamp;

  const targetDate = new Date(timestamp);
  let diff = (now - timestamp) / 1000;

  if (diff < 60) {
    return '刚刚';
  }

  diff /= 60;

  if (diff < 60) {
    return Math.round(diff) + '分钟前';
  }

  diff /= 60;
  // diff /= 24;

  const hours = padding(targetDate.getHours()) + ':' + padding(targetDate.getMinutes());


  if (diff < nowDate.getHours()) {
    return '今天 ' + hours;
  } else if (diff < nowDate.getHours() + 24) {
    return '昨天 ' + hours;
  } else if (diff < nowDate.getHours() + 48) {
    return '前天 ' + hours;
  }

  const days = (targetDate.getMonth() + 1) + '月' + targetDate.getDate() + '日';

  if (targetDate.getUTCFullYear() === nowDate.getUTCFullYear()) {
    return days + ' ' + hours;
  }

  return targetDate.getUTCFullYear() + '年' + ' ' + days + ' ' + hours;
}

export const formatDate = timestamp => {
  if(!/^\d+$/.test(timestamp)){
    return '格式错误'
  }
  const date = new Date(timestamp);
  return `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`
}

/**
 * 将时间戳格式化为2022年05月20日24:00这样的完整时间字符串
 * @param timestamp 时间戳
 * @returns 格式化后的时间字符串
 */
export const formatFullDate = (timestamp: number, needSecond = true) => {
  if (!timestamp) {
    return '时间不能为空';
  }
  if(!/^\d+$/.test(timestamp.toString())){
    return '格式错误'
  }
  const time = new Date(timestamp);
  const month = time.getMonth() + 1;
  const date = time.getDate();
  const hours = time.getHours();
  const minutes = time.getMinutes();
  const seconds = time.getSeconds();
  return `${time.getFullYear()}年${padding(month)}月${padding(date)}日${padding(hours)}:${padding(minutes)}${needSecond ? ':' + padding(seconds) : ''}`;
}

/**
 * 根据时间戳返回月日字符
 * @param timestamp 时间戳
 * @returns x月x日
 */
export const formatMonthDate = (timestamp: number) => {
  if (!timestamp) {
    return '时间参数为空'
  }
  if(!/^\d+$/.test(timestamp.toString())){
    return '格式错误'
  }
  const date = new Date(timestamp);
  return `${date.getMonth() + 1}月${date.getDate()}日`
}

export const formatAvatar = (url: string) => {
  return url ? removeImgQuery(url) + '?imageView&thumbnail=200y200' : 'https://yuedust.yuedu.126.net/snail_st/static/images/share/account_avatar_big@2x.png'
}

/**
 * 将图片url转换为想要的宽高尺寸
 * @param {string} url 图片url
 * @param {number} width 想要得到的图片宽度
 * @param {number} height 想要得到的图片高度
 */
export const formatImageSize = (url: string, width = 200, height = 200, type?: 'jpg' | 'png' | 'webp' | 'gif') => {
  if(!url) return url;
  if(url.indexOf('?') >= 0){
    url = url.split('?')[0];
  }
  if(typeof url === 'string'){
    return url + `?imageView&thumbnail=${width}${width === 0 || height === 0 ? 'x' : 'y'}${height}&enlarge=1${type ? '&type=' + type : ''}`;
  }else{
    throw new Error('Wrong url param.')
  }
}

export const formatPostUrlToMpPreviewUrl = (postUrl: string) => {
  // 由于小程序内只能打开 www.lofter.com 的链接，所以需要进行链接转换
  // 针对例如这样的单日志文章链接 ：http://loftermovie.lofter.com/post/1ddf0c55_2b9ca7477
  // 转化为： https://www.lofter.com/front/blog/preview/post/1ddf0c55_2b9ca7477
  if(!postUrl) return postUrl;
  // 去除 postUrl path 后面的参数
  const url = new URL(postUrl);
  const path = url.pathname;
  const permalink = path.split('/').pop();
  return `https://www.lofter.com/front/blog/preview/post/${permalink}`
}