/**
 * 全局过滤器
 */

// 格式化时间
export function formatTime(date, format = 'YYYY-MM-DD HH:mm:ss') {
  if (!date) return '';
  date = new Date(date);
  const year = date.getFullYear();
  const month = date.getMonth() + 1;
  const day = date.getDate();
  const hour = date.getHours();
  const minute = date.getMinutes();
  const second = date.getSeconds();

  const formatNumber = n => {
    n = n.toString();
    return n[1] ? n : '0' + n;
  };

  return format
    .replace('YYYY', year)
    .replace('MM', formatNumber(month))
    .replace('DD', formatNumber(day))
    .replace('HH', formatNumber(hour))
    .replace('mm', formatNumber(minute))
    .replace('ss', formatNumber(second));
}

// 格式化数字，添加千分位
export function formatNumber(num) {
  if (!num) return '0';
  return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

// 格式化文件大小
export function formatFileSize(bytes) {
  if (!bytes) return '0 B';
  const k = 1024;
  const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
  const i = Math.floor(Math.log(bytes) / Math.log(k));
  return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}

// 格式化手机号码
export function formatPhone(phone) {
  if (!phone) return '';
  return phone.replace(/(\d{3})\d{4}(\d{4})/, '$1****$2');
}

// 格式化金额，保留两位小数
export function formatMoney(money) {
  if (!money) return '0.00';
  return parseFloat(money).toFixed(2);
}

// 格式化百分比
export function formatPercent(num) {
  if (!num) return '0%';
  return (num * 100).toFixed(2) + '%';
}

// 格式化时长（秒转时分秒）
export function formatDuration(seconds) {
  if (!seconds) return '00:00';
  const hour = Math.floor(seconds / 3600);
  const minute = Math.floor((seconds % 3600) / 60);
  const second = seconds % 60;
  
  const formatNumber = n => {
    n = n.toString();
    return n[1] ? n : '0' + n;
  };
  
  if (hour > 0) {
    return `${formatNumber(hour)}:${formatNumber(minute)}:${formatNumber(second)}`;
  } else {
    return `${formatNumber(minute)}:${formatNumber(second)}`;
  }
}

// 过滤HTML标签
export function filterHtml(html) {
  if (!html) return '';
  return html.replace(/<[^>]+>/g, '');
}

// 截取字符串
export function cutString(str, length) {
  if (!str) return '';
  if (str.length <= length) return str;
  return str.substring(0, length) + '...';
}

// 格式化性别
export function formatGender(gender) {
  if (gender === 1) return '男';
  if (gender === 2) return '女';
  return '未知';
}

// 格式化数字为k/w单位
export function formatNumberToK(num) {
  if (!num) return '0';
  if (num < 1000) return num.toString();
  if (num < 10000) return (num / 1000).toFixed(1) + 'k';
  if (num < 100000) return (num / 10000).toFixed(1) + 'w';
  if (num < 1000000) return (num / 10000).toFixed(1) + 'w';
  if (num < 10000000) return (num / 1000000).toFixed(1) + 'kw';
  if (num < 100000000) return (num / 1000000).toFixed(1) + 'kw';
  return (num / 100000000).toFixed(1) + '亿';
}

// 导出所有过滤器
export default {
  formatTime,
  formatNumber,
  formatFileSize,
  formatPhone,
  formatMoney,
  formatPercent,
  formatDuration,
  filterHtml,
  cutString,
  formatGender,
  formatNumberToK
};