import apiConfig from "./apiConfig";

export class Session{
  cookies = ""
  constructor(){

  }
  saveCookies(cookies){
    this.cookies = cookies.map(item => item.split(";")[0]).join("; ");
  }
  splitCookies(string){
    let cookies = string.split(/,\s?(?=[^=,\;]*?\=)/ig);
    return cookies;
  }
  request({ url, header, success,...options}) {
    return wx.request({
      ...options,
      url,
      header: {...header, "Cookie": this.cookies},
      success: (res) => {
        if (res.cookies && res.cookies.length>0)
          this.saveCookies(res.cookies);
        else if (res.header["Set-Cookie"])
          this.saveCookies(this.splitCookies(res.header["Set-Cookie"]));
        else if(res.header["set-cookie"])
          this.saveCookies(this.splitCookies(res.header["set-Cookie"]));
        success(res);
        if(url.indexOf("login.json")!=-1&&!res.data.status&&!this.cookies){
          wx.reportMonitor("0", 2);
          global.realTimeLog.error(res, "login fail: fail parse cookies!!", res);
        }
      }
    });
  }
  uploadFile({url, filePath, name, header, formData, success, fail, complete}){
    return wx.uploadFile({
      url,
      filePath,
      name,
      header: {"Cookie": this.cookies, ...header},
      formData,
      success:res=>{
        try{
          res.data = JSON.parse(res.data);
        }catch(e){
          //@todo
        }
        ;
        if(success)
          success(res)
      },
      fail,
      complete
    })
  }
  downloadFile({url, header, filePath, success, fail, complete}){
    return wx.downloadFile({
      url,
      header: {...header, "Cookie": this.cookies},
      filePath,
      success,
      fail,
      complete
    })
  }
}


function handler({success, fail, complete, resolve, reject}){
  return {
    success: res => {
      if (res.data.status && res.data.status > 100 || res.data.status<0) {
      switch (res.data.status) {
        case 401:
          var message = "(●'◡'●)\n请先登录哦";
          var code = res.data.status;
          break;
        default:
          var message = res.data.message;
          var code = res.data.status;
      }
      let e = new Error(message);
      e.code = code;
      if (fail) fail(e, res.data);
      reject(e, res.data);
      return complete&&complete(e, res.data);
    }
    success&&success(res.data);
    resolve(res.data);
    complete&&complete(res.data);
    },
    fail: e => {
      if ("errMsg" in e)
        (e = new Error("(⋟﹏⋞)\n网络连接失败了")).code = -2;
      if (!("message" in e))
        (e = new Error("哎呀，出错了\n(＞_＜)")).code = -1;
      fail&& fail(e, {});
      reject(e, {});
      complete&&complete(e, {});
    }
  }
}

export function triggerApi({session, name, data:_data = {}, success, fail, complete, config:{method,header={}}={}}) {
  let api = apiConfig;
  for (var key of name.split(".")) api=api[key];
  let { url, query={}, form = {}, config:{method:_method,_header={},...config}={}} = api;
  method = method || _method;
  if(url){
    if(url._)
      url = url[method||"GET"]||url._;
    url = name.replace(/\.?[^\.]+$|\./g, "/") + url.replace(/\{(.*?)\}/, function (match, k) {
        return _data[k];
      }).replace(/\*/g,key);
  }else
    url = name.replace(/\./g, "/");
  url = global.config.apiRoot + url + ".json";
  header = {..._header,...header};
  var data={},param={};
  if(form._)
    form={...form._,...form[method||"GET"]};
  if(query._)
    query={...query._,...query[method||"GET"]};
  for(var key in form){
    if(key in _data)
      data[key]=_data[key];
    else{
      let value = form[key];
      if (value!=null)
        data[key] = value;
      else if (typeof value == "object")
        console.error(`${key} was not given in data`, _data); 
    }
  }
  for(var key in query){
    if (key in _data)
      param[key] = _data[key];
    else {
      let value = query[key];
      if (value!=null)
        param[key] = value;
      else if (typeof value == "object")
        console.error(`${key} was not given in data`, _data);  
    }
  }
  let queryStr = Object.keys(param).map(key => `${key}=${param[key]}`).join("&");
  if(queryStr)
    url = url+"?"+queryStr;
  if(method=="uploadFile"){
    
    var formData = data;
    var {name:_name, timeout} = config;
    if(!_name)
      _name = Object.keys(formData)[0];
    var filePath = formData[_name];
    delete formData[_name];
    return new Promise((resolve, reject)=>{
      session.uploadFile({
        url, filePath, name:_name, header, timeout, formData, ...handler({success, fail, complete, resolve, reject})
      })
    });
  }else if(method=="downloadFile"){
    return new Promise((resolve,reject)=>{
      session.downloadFile({
        url, header, success:res=>{
          resolve(res);
          success&&success(res);
        }, fail:e=>{
          reject(e);
          fail&&fail(e)
        },complete 
      })
    })
  }else
    return new Promise((resolve, reject) => {
      session.request({
        url, method, data, header,...handler({success, fail, complete, resolve, reject})
      });
  })
}