var methods = {
	POST_METHOD: 'POST',
	DELETE_METHOD: 'DELETE',
	PUT_METHOD: 'PUT',
	GET_METHOD: 'GET'
};

/**
 * 新增
 * @param url
 * @param dataObj
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param completeCallback
 */
function postJson(url, dataObj, args, successCallback, errorCallback, completeCallback) {
	doAjax(url, methods.POST_METHOD, dataObj, args, successCallback, errorCallback, completeCallback);
}

/**
 * 删除
 * @param url
 * @param dataObj
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param completeCallback
 */
function deleteForm(url, dataObj, args, successCallback, errorCallback, completeCallback) {
	doAjax(url, methods.DELETE_METHOD, dataObj, args, successCallback, errorCallback, completeCallback);
}

/**
 * 修改
 * @param url
 * @param dataObj
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param completeCallback
 */
function putJson(url, dataObj, args, successCallback, errorCallback, completeCallback) {
	doAjax(url, methods.PUT_METHOD, dataObj, args, successCallback, errorCallback, completeCallback);
}

/**
 * 查询
 * @param url
 * @param dataObj
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param completeCallback
 */
function getForm(url, dataObj, args, successCallback, errorCallback, completeCallback) {
	doAjax(url, methods.GET_METHOD, dataObj, args, successCallback, errorCallback, completeCallback);
}

/**
 * 执行上传
 * @param url
 * @param method
 * @param dataObj
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param completeCallback
 */
function doAjax(url, method, dataObj, args, successCallback, errorCallback, completeCallback) {
	var headers = {};
	if (args != null && typeof (args.headers) != 'undefined' && args.headers != null) {
		headers = args.headers;
	}
	wx.request({
		url: url,
		method: method,
		data: dataObj,
		header: headers,
		dataType: 'json',
		success: function (response) {
			if (response.statusCode == 200) {
				successCallback(response.statusCode, response.data, args);
			} else {
				console.log(response)
				if (errorCallback && typeof errorCallback == 'function') {
					errorCallback(response.statusCode, response.data);
				}
			}
		},
		fail: function (response) {
			if (errorCallback && typeof errorCallback == 'function') {
				console.log(response);
				errorCallback(response.statusCode, response.data);
			}
		},
		complete: function () {
			if (completeCallback && typeof (completeCallback) == 'function') {
				completeCallback();
			}
		}
	})
}

/**
 * 检测是路径参数有重复值
 * @param pathArgArray
 * @returns {boolean}
 */
function pathArgsHasSameValue(pathArgArray) {
	var tempArgIndex = 0;
	var tempArgs = pathArgArray[tempArgIndex];
	for (var i = (tempArgIndex + 1), item; item = pathArgArray[i]; i++) {
		if (tempArgs == item) {
			throw new Error('参数' + item + '有重复值!!!');
		}
		if (i == pathArgArray.length - 1) {
			tempArgs = pathArgArray[++tempArgIndex];
			i = tempArgIndex;
			continue;
		}
	}
}

/**
 * 获取页面间传递的参数
 * @param url
 */
function getParamsArg(url) {
	var params = url.split('?')[1];
	var paramsObj = {};
	if (typeof (params) == 'undefined' || params == null) {
		return paramsObj;
	}
	var paramsKVs = params.split('&');
	for (var i = 0, item = null; item = paramsKVs[i++];) {
		var kvs = item.split('=');
		if (kvs.length == 1) {
			paramsObj[kvs[0]] = null;
		}
		if (kvs.length == 2) {
			paramsObj[kvs[0]] = decodeURI(kvs[1]);
		}
	}
	return paramsObj;
}

/**
 * 构建路径
 * @param basePath 请求路径，{参数},
 * @param pathArgs 替换的路径参数，不能重复
 * @returns {*}
 */
function buildPath(basePath, pathArgs) {
	var path = basePath;
	if (!basePath || !(typeof (basePath) == 'string')) {
		throw new Error('basePath必须为字符串!!!');
	}
	if (!pathArgs || !Array.isArray(pathArgs)) {
		throw new Error('pathArgs必须为数组!!!');
	}
	var pathArgArray = basePath.match(/\{\w+\}/g);
	if (!pathArgArray) {
		return path;
	}
	pathArgsHasSameValue(pathArgArray);
	for (var i = 0, item; item = pathArgArray[i]; i++) {
		path = path.replace(item, pathArgs[i]);
	}
	return path;
}

/**
 * 通过form对象上传文件
 * @param url
 * @param formData
 * @param args
 * @param successCallback
 * @param errorCallback
 * @param beforeCallback
 * @param completeCallback
 */
function postFile(url, path, name, args, successCallback, errorCallback, completeCallback) {
	var headers = {};
	if (args != null && typeof (args.headers) != 'undefined' && args.headers != null) {
		headers = args.headers;
	}
	wx.uploadFile({
		filePath: path,
		name: name,
		url: url,
		header: headers,
		success: function (response) {
			if (response.statusCode == 200) {
				successCallback(response.statusCode, response.data, args);
			} else {
				if (errorCallback && typeof (errorCallback) == 'function') {
					errorCallback(response.statusCode, response.data);
				}
			}
		},
		fail: function (response) {
			console.log(response);
		},
		complete: function () {
			if (completeCallback && typeof (completeCallback) == 'function') {
				completeCallback();
			}
		}
	})
};

/**
 * xss 转义
 * @param html
 * @returns {string}
 */
function escape(html) {
	return String(html || '').replace(/&(?!#?[a-zA-Z0-9]+;)/g, '&')
		.replace(/</g, '&lt;').replace(/>/g, '&gt;')
		.replace(/'/g, '&#39;').replace(/"/g, '&quot;');
}

module.exports.post = postJson;
module.exports.delete = deleteForm;
module.exports.put = putJson;
module.exports.get = getForm;
module.exports.params = getParamsArg;
module.exports.path = buildPath;
module.exports.escape = escape;
module.exports.file = postFile;