import GameUtil from "../../core/GameUtil";
import SKDataUtil from "../util/SKDataUtil";
import SKLogger from "../util/SKLogger";

export enum NetCode {
	SUCCESS = 0,
	STATUS = 1,
	TIMEOUT = 2,
	ERROR = 3,
}

// Http請求任務
export default class SKNetTask {
	public static baseURL : string = "";

	public path : string;
	public params : any;
	public jsonBlock : (code : NetCode, result : any) => void;

	private url : string;
	private xhr : XMLHttpRequest;
	private status : number;

	constructor(path : string, params : any, jsonBlock : (code : number, result : any) => void) {
		this.path = path;
		this.params = params;
		this.jsonBlock = jsonBlock;
	}

	static getWithJson(path : string, params : any, jsonBlock : (code : number, result : any) => void) {
		let task = new SKNetTask(path, params, jsonBlock);
		task.load();
	}

	static postWithJson(path : string, params : any, jsonBlock : (code : number, result : any) => void) {
		let task = new SKNetTask(path, params, jsonBlock);
		task.load("POST");
	}

	public urlParam(url : string, name : string, value : string) {
		url += (url.indexOf('?') == -1) ? '?' : '&';
		url += encodeURIComponent(name) + "=" + encodeURIComponent(value);
		return url;
	}

	public param(param : string, name : string, value : string) {
		param += (param.length < 1) ? "" : "&";
		param += encodeURIComponent(name) + "=" + encodeURIComponent(value);
		return param;
	}
	// 載入
	public load(method : string = "GET") {
		cc.log("load...", SKNetTask.baseURL)
		if (!SKNetTask.baseURL || SKNetTask.baseURL.length < 1) {
			return;
		}

		cc.log("load1...", SKNetTask.baseURL)
		if (this.xhr) {
			return;
		}

		cc.log("load2...", SKNetTask.baseURL)
		let xhr = new XMLHttpRequest();
		this.status = -1;
		let self = this;
		xhr.onerror = (event : ProgressEvent) => {
			let info = `$警告:帳號[${GameUtil.account}]請求失敗:${self.url}`;
			SKLogger.warn(info);
			SKLogger.warn(this.path);
			if (self.status < 200 || self.status >= 300) {
				console.log("網絡狀態碼：" + self.status)
				self.jsonBlock(NetCode.STATUS, null);
			} else {
				self.jsonBlock(NetCode.ERROR, null);
			}
		}
		xhr.ontimeout = (event : ProgressEvent) => {
			if (self.status == 0) {
				return;
			}
			let info = `$警告:帳號[${GameUtil.account}]請求超時:${self.url}`;
			cc.warn(info);
			self.jsonBlock(NetCode.TIMEOUT, null);
		}
		xhr.onreadystatechange = () => {
			if (xhr.readyState == 4) {
				let code = NetCode.ERROR;
				let data = null;
				try {
					self.status = xhr.status;
					if (self.status >= 200 && self.status < 300) {
						data = SKDataUtil.jsonBy(xhr.responseText);
						code = NetCode.SUCCESS;
					} else {
						code = NetCode.STATUS;
						SKLogger.warn(`$警告:帳號[${GameUtil.account}]狀態碼[${self.status}]錯誤:${self.url}`);
					}
				} catch (error) {
					SKLogger.warn(`$警告:帳號[${GameUtil.account}]網絡請求錯誤:${this.url}`);
				} finally {
					self.xhr = null;
					self.jsonBlock(code, data);
				}
			}
		};
		this.url = this.path;
		if (this.path.indexOf("/") == 0 && SKNetTask.baseURL) {
			this.url = SKNetTask.baseURL + this.path;
		}
		let params = ``;
		if (this.params) {
			for (let key in this.params) {
				params = this.param(params, key, this.params[key]);
			}
		}
		if (method == "GET") {
			if (params.length > 0) {
				this.url = `${this.url}?${params}`;
			}
			SKLogger.debug(`接口GET請求:${this.url}`);
			xhr.open(method, this.url, true);
			xhr.send();
			cc.log("load4...", this.url)
		} else if (method == "POST") {
			SKLogger.debug(`接口POST請求:${this.url}`);
			xhr.open(method, this.url, true);
			xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
			xhr.send(params);
		}
		cc.log("load5...", SKNetTask.baseURL)
	}
	// 取消請求
	public cancel() {
		if (this.xhr == null) {
			return;
		}
		this.xhr.abort();
		this.xhr = null;
	}
}