/**
	Calls KnowRe-style AJAX.

		glesea.ajax({
			method: 'get',
			url: '/api/foo',
			input: {
				key: 'value'
			},
			// ...
		});

	@method ajax
	@for glesea

	@param {String} [method='get'] HTTP method
	@param {String} [url='/'] Address to call
	@param {Number} [port=443] Port to connect
	@param {Object} [headers={}] Additional headers
	@param {Object} [input={}] Payload
	@param {Function} [onSuccess=Function] Callback on success
	@param {Function} [onFailure=Function] Callback on failure
	@param {Boolean} [https=true] Whether to convert every request to https
	@param {Boolean} [needLogin=true] Whether needs session logged in
	@param {Boolean} [swintStyle=true] Whether to apply Swint-style API(input payload and session-error-output tuple)
	@param {Number} [timeOut=0] Timeout. Void when set to 0. Milliseconds.
	@param {Boolean} [timeOutPopup=true] Whether to show popup window when timeout occurs
	@param {Boolean} [errorPopup=true] Whether to show popup window when server/session error occurs
	@param {Object} [loadingIndicator={on: Function, off: Function}] Callback when loading indicator needs to be turned on/off.
	@param {Function} [sessionError=Function] Callback especially on session error. On default, it redirects to the root(/) instead of executing onFailure.
	@param {Function} [serverError=Function] Callback especially on 500 server error. After closing modaless dialog, it executes onFailure.
	@param {Function} [aborted=Function] Callback especially on timeout. After closing modaless dialog, it executes onFailure.

	@return nothing
**/
(function(glesea) {
	glesea.ajax = function(options) {
		var sTimeOut,
			input,
			oli = document.createElement('oreesh-loading-indicator'),
			od = document.createElement('oreesh-dialog');

		glesea.defaultize({
			method: 'get',
			url: '/',
			headers: {},
			input: {},
			onSuccess: function() {},
			onFailure: function() {},
			port: (function() {
				var currPort = Number(document.location.port);

				if (currPort === 0) {
					if (document.location.protocol.match('https')) {
						currPort = 443;
					} else {
						currPort = 80;
					}
				}

				if (document.location.protocol.match('https')) {
					if (options.hasOwnProperty('https')) {
						if (options.https) {
							return currPort;
						} else {
							return currPort > 1024 ? 8080 : 80;
						}
					} else {
						return currPort;
					}
				} else {
					if (options.hasOwnProperty('https')) {
						if (options.https) {
							return currPort > 1024 ? 8443 : 443;
						} else {
							return currPort;
						}
					} else {
						return currPort > 1024 ? 8443 : 443;
					}
				}
			})(),
			cache: 'no-cache',
			https: true,
			needLogin: true,
			timeOut: 0,
			timeOutPopup: true,
			errorPopup: true,
			swintStyle: true,
			sessionErrorRedirectURL : '/',
			loadingIndicator: {
				on: function() {
					document.querySelector('body').appendChild(oli);
				},
				off: function() {
					if (oli.parentNode) {
						oli.parentNode.removeChild(oli);
					}
				}
			},
			sessionError: function(output) {
				if (output.session) return;

				if (options.errorPopup) {
					od.message = output.error || glesea.i18n[glesea.setting.locale].ajax.sessionError;
					od.setAttribute('small-icon', 'error');
					document.querySelector('body').appendChild(od);

					od.yesButtonCallback = function() {
						options.onFailure(output.data);
						document.location.href = options.sessionErrorRedirectURL;
					};
				} else {
					options.onFailure(output.data);
				}
				options.loadingIndicator.off();
			},
			serverError: function(output) {
				if (options.errorPopup) {
					od.message = output.error || glesea.i18n[glesea.setting.locale].ajax.defaultError;
					od.setAttribute('small-icon', 'error');
					document.querySelector('body').appendChild(od);

					od.yesButtonCallback = function() {
						options.onFailure(output.data);
					};
				} else {
					options.onFailure(output.data);
				}
				options.loadingIndicator.off();
			},
			aborted: function() {
				if (options.timeOutPopup) {
					od.message = glesea.i18n[glesea.setting.locale].ajax.aborted;
					od.setAttribute('small-icon', 'error');
					document.querySelector('body').appendChild(od);

					od.yesButtonCallback = function() {
						options.onFailure({});
					};	
				} else {
					options.onFailure({});
				}
				
				options.loadingIndicator.off();
			}
		}, options);
		
		options.loadingIndicator.on();

		if (options.https) {
			if (options.url.match(/\:/)) {
				var urlArr = options.url.split(':');
				urlArr[0] = 'https';
				options.url = urlArr.join(':');
			} else {
				var hostname = window.location.hostname;

				if (options.port !== 443) {
					hostname += ':' + options.port;
				}

				if (options.url[0] === '/') {
					options.url = 'https://' + hostname + options.url;
				} else {
					options.url = 'https://' + hostname + '/' + options.url;
				}
			}
		}

		input = encodeURIComponent(JSON.stringify(options.input));

		var opt = {
				method: options.method,
				headers : options.headers,
				cache: options.cache,
				credentials: options.needLogin ? 'include' : 'same-origin'
			},
			isTimeout = false;

		switch (options.method) {
			case 'get':
				options.url += '?input=' + input;
				if (opt.cache === 'no-cache') {
					options.url += '&_=' + Date.now();
				}
				break;
			case 'post':
			case 'put':
				opt.headers['Content-Type'] = 'application/x-www-form-urlencoded';
				opt.body = 'input=' + input;
				break;
			default:
				break;
		}

		fetch(options.url, opt).then(function(resp) {
			if (sTimeOut) clearTimeout(sTimeOut);

			options.loadingIndicator.off();

			if (Math.floor(resp.status / 100) !== 2) {
				var error = new Error(resp.statusText);
				error.resp = resp;
				throw error;
			}

			if (options.swintStyle) {
				return resp.json();
			} else {
				return resp.text();
			}
		}).then(function(output) {
			if (isTimeout) return;
			if (options.swintStyle) {
				if (output.success) {
					options.onSuccess(output.data);
				} else if (!output.session && options.needLogin) {
					options.sessionError(output);
				} else {
					options.serverError(output);
				}
			} else {
				options.onSuccess(output);
			}
		}).catch(function(ex) {
			print(4, ex);
			if (options.swintStyle) {
				ex.resp.json().then(function(json) {
					if (!json.session && options.needLogin) {
						options.sessionError(json);
					} else {
						options.serverError(json);
					}
				});
			} else {
				options.serverError(ex);
			}
		});
		
		if (options.timeOut !== 0) {
			sTimeOut = setTimeout(function() {
				isTimeout = true;
				options.aborted();
			}, options.timeOut);
		}
	};
})(glesea);