import { baseUrl } from "@/config";
import { isExternal } from "@/utils/validate";

/**
 * 判断是否空字符串
 */
export function isBlank(str) {
  return str == null || str === '';
}

/**
 * 字符串转换为数组
 */
export function strToList(str, split = ',') {
  if (isBlank(str)) {
    return [];
  }
  if (str instanceof Array) {
    return str;
  }
  return str.split(split);
}

export function getRealUrl(url) {
  return url.substring(0, url.lastIndexOf('?'))
}

export function isEmpty(obj) {
  return obj == null || obj.length === 0;
}

/**
 * 转换本地URL，若是本地URL则加前缀，否则直接返回
 * @param url
 */
export function parseLocalUrl(url) {
  if (isEmpty(url) || isExternal(url)) {
    return url;
  }
  return baseUrl + url;
}


// 日期格式化
export function parseTime(time, pattern) {
  if (arguments.length === 0 || !time) {
    return null
  }
  const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    } else if (typeof time === 'string') {
      time = time.replace(new RegExp(/-/gm), '/').replace('T', ' ').replace(new RegExp(/\.[\d]{3}/gm), '');
    }
    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, key) => {
    let value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    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
}

/**
 * 解析地址信息
 * @param {Object} res - 地址信息对象
 * @returns {Object} 解析后的地址对象
 */
export function parseLocation(res) {
  if (!res || !res.address) {
    return {
      province: null,
      country: null,
      city: null,
      address: null
    };
  }

  const addressBean = {
    province: null,
    country: null,
    city: null,
    address: null
  };

  // 直辖市和特别行政区匹配
  const directCityRegex = /^(北京市|天津市|重庆市|上海市|香港特别行政区|澳门特别行政区)/;
  const directCityMatch = directCityRegex.exec(res.address);

  if (directCityMatch) {
    addressBean.province = directCityMatch[1];
    regexAddressBean(res, addressBean);
  } else {
    // 普通省份匹配
    const provinceRegex = /^(.*?(省|自治区))(.*?)$/;
    const provinceMatch = provinceRegex.exec(res.address);

    if (provinceMatch) {
      addressBean.province = provinceMatch[1];
      regexAddressBean(res, addressBean);
    } else {
      // 无法匹配省份的情况
      regexAddressBean(res, addressBean);
    }
  }

  return addressBean;
}

/**
 * 正则解析地址信息
 * @param {Object} res - 地址信息对象
 * @param {Object} addressBean - 地址对象
 */
function regexAddressBean(res, addressBean) {
  if (!res || !res.address) return;

  // 移除省份信息后的地址
  const addressWithoutProvince = res.address.replace(addressBean.province, '');

  const regex = /^(.*?[市]|.*?地区|.*?特别行政区)(.*?[市区县])(.*?)$/g;
  const match = regex.exec(addressWithoutProvince);

  if (match && match.length >= 4) {
    addressBean.city = match[1];
    addressBean.country = match[2];
    addressBean.address = match[3] + (res.name ? `(${res.name})` : '');
  } else {
    // 如果正则匹配失败，将整个地址作为详细地址
    addressBean.address = res.address + (res.name ? `(${res.name})` : '');
  }
}

// 文件类型
export const FileType = {
  // 图片
  IMAGE: ['png', 'jpg', 'jpeg', 'gif', 'bmp', 'webp', 'ico'],
  // 办公
  OFFICE: ['doc', 'docx', 'xls', 'xlsx', 'pdf', 'ppt', 'pptx'],
  // 音频
  AUDIO: ['mp3', 'wav', 'm4a', 'ogg', 'flac', 'aac'],
  // 视频
  VIDEO: ['mp4', 'avi', 'mov', 'wmv', 'flv', 'mpeg', 'mpg', 'm4v', 'webm', 'mkv'],
  // 压缩文件
  ZIP: ['zip', 'rar', '7z'],
  // 其他
  OTHER: ['exe'],
  // 全部
  all() {
    return [...this.IMAGE, ...this.OFFICE, ...this.AUDIO, ...this.VIDEO, ...this.OTHER, ...this.ZIP];
  }
}


/**
 * 获取文件扩展名，支持文件名或url
 * @param {string} fileNameOrUrl 文件名或url
 * @returns {string} 扩展名（小写），无扩展名返回空字符串
 */
export function getExt(fileNameOrUrl) {
  if (!fileNameOrUrl) return '';
  // 去除url参数
  let cleanName = fileNameOrUrl.split('?')[0].split('#')[0];
  // 只取最后的文件名部分
  cleanName = cleanName.substring(cleanName.lastIndexOf('/') + 1);
  const lastDot = cleanName.lastIndexOf('.');
  if (lastDot > -1 && lastDot < cleanName.length - 1) {
    return cleanName.slice(lastDot + 1).toLowerCase();
  }
  return '';
}

// 是否为办公文件
export function isOfficeFile(url) {
  const ext = getExt(url);
  return FileType.OFFICE.includes(ext);
}
// 是否为音频文件
export function isAudioFile(url) {
  const ext = getExt(url);
  return FileType.AUDIO.includes(ext);
}

// 是否为图片
export function isImage(url) {
  const ext = getExt(url);
  return FileType.IMAGE.includes(ext);
}
// 是否为视频
export function isVideo(url) {
  const ext = getExt(url);
  return FileType.VIDEO.includes(ext);
}