//** REQUEST TYPES **//
export const REQUEST_TYPE_POST = "POST";
export const REQUEST_TYPE_GET = "GET";
export const REQUEST_TYPE_PUT = "PUT";
export const REQUEST_TYPE_DELETE = "DELETE";
//** POST CONTENT TYPES **//
export const CONTENT_TYPE_JSON = "json";
export const CONTENT_TYPE_FORM = "x-www-form-urlencoded";
//** API URLS **//
export const API_STATUS = "/api/v1/status";
export const API_INIT = "/api/v1/init";
export const API_RESTORE = "/api/v1/restore";
export const API_LOGIN = "/api/v1/login";
export const API_GET_PAGES = "/api/v1/page/published";
export const API_GET_PAGE = "/api/v1/page/single";
export const API_GET_SECRET = "/api/v1/get-secret";
export const API_RESET_PASS = "/api/v1/reset-password";
//** API TASKS **//
export const AUTH_STATUS = "getAuthStatus";
export const TASK_SITE_INIT = "blogInit";
export const TASK_BACKUP_RESTORE = "downloadBackup";
export const TASK_GET_SECRET = "retrieveSecret";
export const TASK_RESET_PASS = "resetPassword";
export const TASK_GET_CONTENT = "retrieveContent";

export default class FipamoAPI {
  //--------------------------
  // constructor
  //--------------------------
  constructor(baseURL = null) {
    this.baseURL = null;
    if (baseURL) {
      this.baseURL = baseURL;
    }
  }
  //--------------------------
  // methods
  //--------------------------

  //** MEMBER AUTH METHODS **//
  login(data) {
    return new Promise((resolve, reject) => {
      this._request(
        this.baseURL ? this.baseURL + API_LOGIN : API_LOGIN,
        AUTH_STATUS,
        REQUEST_TYPE_POST,
        CONTENT_TYPE_JSON,
        data
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }
  init(data) {
    return new Promise((resolve, reject) => {
      this._request(
        API_INIT,
        TASK_SITE_INIT,
        REQUEST_TYPE_POST,
        CONTENT_TYPE_JSON,
        data
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }

  handleInitRestore(form) {
    return new Promise((resolve, reject) => {
      var url, event, method, type, data;

      url = API_RESTORE;
      event = TASK_BACKUP_RESTORE;
      method = REQUEST_TYPE_POST;
      type = CONTENT_TYPE_FORM;
      data = new FormData(form);
      this._request(url, event, method, type, data)
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }

  getSecret(data) {
    return new Promise((resolve, reject) => {
      this._request(
        API_GET_SECRET,
        TASK_GET_SECRET,
        REQUEST_TYPE_POST,
        CONTENT_TYPE_JSON,
        data
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }

  setNewPass(data) {
    return new Promise((resolve, reject) => {
      this._request(
        API_RESET_PASS,
        TASK_RESET_PASS,
        REQUEST_TYPE_POST,
        CONTENT_TYPE_JSON,
        data
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }

  //** CONTENT API METHODS  **//

  getPages(num, key) {
    let pageNum = num;
    if (pageNum === null || pageNum === "" || !pageNum) pageNum = 1;
    return new Promise((resolve, reject) => {
      this._request(
        API_GET_PAGES + "/" + pageNum + "?key=" + key,
        TASK_GET_CONTENT,
        REQUEST_TYPE_GET
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }

  getPage(id, key) {
    return new Promise((resolve, reject) => {
      this._request(
        API_GET_PAGE + "/" + id + "?key=" + key,
        TASK_GET_CONTENT,
        REQUEST_TYPE_GET
      )
        .then((result) => {
          resolve(result);
        })
        .catch((err) => {
          reject(err);
        });
    });
  }
  //--------------------------
  // private
  //--------------------------
  _request(
    requestURL,
    eventType,
    requestType = REQUEST_TYPE_GET,
    contentType = CONTENT_TYPE_JSON,
    requestData = null
  ) {
    var self = this;
    return new Promise(function (resolve, reject) {
      var request = new XMLHttpRequest();
      request.upload.onprogress = self.handleLoadProgress;
      request.open(requestType, requestURL, true);
      request.onload = () => {
        if (request.status == 200) {
          let response = JSON.parse(request["response"]);
          resolve(response);
        } else {
          let error = JSON.parse(request["response"]);
          reject(error);
        }
      };
      if (requestType == REQUEST_TYPE_PUT || requestType == REQUEST_TYPE_POST) {
        switch (contentType) {
          case CONTENT_TYPE_JSON:
            request.setRequestHeader(
              "Content-type",
              "application/" + contentType
            );
            /**
            request.setRequestHeader(
              "Access-Control-Allow-Origin",
              self.baseURL
            );
            **/
            request.send(JSON.stringify(requestData));
            break;
          case CONTENT_TYPE_FORM:
            request.send(requestData);
            break;
        }
      } else {
        request.send();
      }
    });
  }

  //--------------------------
  // event handlers
  //--------------------------
  handleLoadProgress(e) {
    this.percentComplete = Math.ceil((e.loaded / e.total) * 100);
    //pass element to display request progress
  }
}