//** 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_RESET = '/api/v1/reset';
export const API_GET_SECRET = '/api/v1/get-secret';
export const API_RESET_PASS = '/api/v1/reset-password';
export const API_CREATE_BACKUP = '/api/v1/backup/create';
export const API_DOWNLOAD_BACKUP = '/api/v1/backup/download';
export const API_RESTORE_BACKUP = '/api/v1/backup/restore';
export const API_UPLOAD_AVATAR = '/api/v1/settings/add-avatar';
export const API_UPLOAD_BACKGROUND = '/api/v1/settings/add-feature-background';
export const API_IMAGE_UPLOAD = '/api/v1/page/add-entry-image';
export const API_FILES_UPLOAD = '/api/v1/files';
//** API TASKS **//
export const TASK_SITE_INIT = 'blogInit';
export const TASK_BACKUP_RESTORE = 'restoreBackup';
export const TASK_BACKUP_CREATE = 'createBackup';
export const TASK_GET_SECRET = 'retrieveSecret';
export const TASK_RESET_PASS = 'resetPassword';
export const TASK_UPLOAD_FILES = 'uploadFiles';
//** API STATUS **//
export const API_ACCESS_GOOD = 'apiUseAuthorized';
export const API_ACCESS_BAD = 'apiUseNotAuthorized';

/**
 * A tub of methods for creating/restoring installs, resetting passwords and uploading images.
 */
class MaintenanceManager {
	/**
	 * @constructor
	 * @param {string} baseURL - url of site; uses local when empty
	 * @param {string} key - user api key
	 */
	constructor(baseURL = null, key = null) {
		this.accetableFiles = [
			'image/jpeg',
			'image/gif',
			'image/png',
			'image/svg',
			'audio/mpeg',
			'video/mp4',
			'application/pdf',
			'text/plain',
			'text/rtf'
		];
		this.percentComplete = 0; //for later
		this.token = null;
		this.baseURL = null;
		this.key = null;
		if (key) this.key = key;
		if (baseURL) this.baseURL = baseURL;
		//if key is valid, checks to see if a session is active and returns
		this._request(
			this.baseURL
				? this.baseURL + API_STATUS + '?key=' + this.key
				: API_STATUS + '?key=' + this.key
		).then(response => {
			if (response.type === API_ACCESS_GOOD) {
				this.token = response.token;
			} else {
				//don't set token
				//console.log("NO TOKEN");
			}
		});
	}

	/**
	 * Promise method used create new site from scratch. For local use only.
	 * @param {object} data - json object that contains data for set up
	 * @property {string} new_member_handle - handle for new user
	 * @property {string} new_member_email - email for new user
	 * @property {string} new_member_pass - password for new user
	 * @property {string} new_member_title - title for new user
	 */
	create(data) {
		return new Promise((resolve, reject) => {
			this._request(
				API_INIT,
				null,
				TASK_SITE_INIT,
				REQUEST_TYPE_POST,
				CONTENT_TYPE_JSON,
				data
			)
				.then(result => {
					resolve(result);
				})
				.catch(err => {
					reject(err);
				});
		});
	}
	/**
	 * Promise method for restoring site from a previous back up. For local use only.
	 * @param {object} form - form object that contains restore data and files
	 * @property {string} restore_member_handle - handle for site user
	 * @property {string} restore_member_pass - password for site user
	 * @property {file} backup-upload - backup zip file
	 */
	restore(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, null, event, method, type, data)
				.then(result => {
					resolve(result);
				})
				.catch(err => {
					reject(err);
				});
		});
	}

	/**
	 * Promise method for restoring site to default state
	 */
	reset(data) {
		return new Promise((resolve, reject) => {
			this._request(
				API_RESET,
				null,
				TASK_SITE_INIT,
				REQUEST_TYPE_POST,
				CONTENT_TYPE_JSON,
				data
			)
				.then(result => {
					resolve(result);
				})
				.catch(err => {
					reject(err);
				});
		});
	}

	/**
	 * Promise method for creating a zip back up of current site. For local use only.
	 */

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

			url = API_CREATE_BACKUP;
			event = TASK_BACKUP_CREATE;
			method = REQUEST_TYPE_PUT;
			type = CONTENT_TYPE_JSON;
			data = backup_task;
			this._request(url, null, event, method, type, data)
				.then(result => {
					resolve(result);
				})
				.catch(err => {
					reject(err);
				});
		});
	}

	/**
	 * Promise method for retrieving user secret key. For local use only.
	 * @param {object} data - json object that contains data for set up
	 * @property {string} email - email for site user
	 */

	secret(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);
				});
		});
	}
	/**
	 * Promise method for resetting password for user. For local use only.
	 * @param {object} data - json object that contains data for set up
	 * @property {string} new_password - password for user
	 * @property {string} new_password2 - confirm password for user
	 * @property {string} secret - secret key for user
	 */

	newPass(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);
				});
		});
	}

	/**
	 * Promise method for uploading files [todo: change to uploading files]
	 * @param {string} type - type of upload
	 * @param {input} files - form input containing files
	 */
	filesUpload(type, files, progress = null) {
		return new Promise((resolve, reject) => {
			let url = API_FILES_UPLOAD;

			if (this.baseURL) {
				files.append('key', this.key);
				files.append('remote', true);
			} else {
				files.append('remote', false);
			}

			this._request(
				url,
				progress,
				TASK_UPLOAD_FILES,
				REQUEST_TYPE_POST,
				CONTENT_TYPE_FORM,
				files
			)
				.then(r => {
					resolve(r);
				})
				.catch(err => {
					reject(err);
				});
		});
	}

	//--------------------------
	// private
	//--------------------------
	_request(
		requestURL,
		progressBar = null,
		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.addEventListener('progress', e =>
				self.handleLoadProgress(e, progressBar)
			);
			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) {
				if (eventType === TASK_UPLOAD_FILES)
					request.setRequestHeader('fipamo-access-token', self.token);
				switch (contentType) {
					case CONTENT_TYPE_JSON:
						request.setRequestHeader(
							'Content-type',
							'application/' + contentType
						);
						request.send(JSON.stringify(requestData));
						break;
					case CONTENT_TYPE_FORM:
						request.send(requestData);
						break;
				}
			} else {
				request.send();
			}
		});
	}

	//--------------------------
	// event handlers
	//--------------------------
	handleLoadProgress(e, progressBar) {
		let percent = Math.ceil((e.loaded / e.total) * 100);
		//if a progress bar element is present, talk to it
		if (progressBar != null) {
			progressBar.style.width = percent + '%';
		}
	}
}

export { MaintenanceManager as default };