import { Config } from './Result';

class DomainJson {
    public config: [];
    public login: [];
    public payment: string;
    public contack: string;
    public ecoin: string;
    public group: string;
}

export class ConfigLoader {
    public static configFilename: string = "coresdk_domain_v1.txt";

    onConfigLoaderInitializeCallback: (isSuccess: boolean, result: Config) => void;
    domainJson: DomainJson;
    config: Config;

	public initialize(callback: (isSuccess: boolean, result: Config) => void): void {
        this.onConfigLoaderInitializeCallback = callback;

        this.loadLocalConfig();
    }
    
    loadLocalConfig(): void {
        cc.loader.loadRes(ConfigLoader.configFilename, (err, res) =>
        {
            console.log( "加载成功返回" + JSON.stringify( res )  );
            
            this.parseDomainJson(res);
            this.updateConfig();
        });
    }

	parseDomainJson(jsonText: string): void {
        this.domainJson = JSON.parse(jsonText);
	}

	updateConfig(): void {
		if (this.domainJson.config.length == 0) {
            this.onConfigLoaderInitializeCallback(false, new Config());
			return;
		}

        var url = this.domainJson.config.shift();		// 取出第一個元素
        this.httpGet(url, this.onConfigDownloaded.bind(this));
    }

	onConfigDownloaded(isError: boolean, text: string): void {
		if (isError) {
			this.updateConfig();
			return;
		}

        // 下載到新的domain_config，保留起來
        cc.sys.localStorage.setItem(ConfigLoader.configFilename, text);
		this.parseDomainJson(text);
		this.findLoginDomain();
    }
    
	findLoginDomain(): void {
		if (this.domainJson.login.length == 0) {
			if (this.onConfigLoaderInitializeCallback)
                this.onConfigLoaderInitializeCallback(false, new Config());

			return;
		}

		var url = this.domainJson.login.shift();			// 取出第一個元素

        this.config = new Config();
		this.config.Domain = url;
		this.config.ApiDomain = url + "/api";
        console.log( "当前的配置相关" + JSON.stringify( this.domainJson ) );
        
        this.config.PaymentDomain = this.domainJson.payment;
        // this.config.Contack = this.domainJson.contack;
        // this.config.TGroup = this.domainJson.group;
        // this.config.FreeEcoin = this.domainJson.ecoin;
        this.httpGet(url + "/api/checkLoginUrl", this.onLoginDomainResponse.bind(this));
    }
    
	onLoginDomainResponse(isError: boolean, text: string): void {
		if (isError) {
			this.findLoginDomain();
			return;
		}

		// 確認login domain 可以正常使用
		if (this.onConfigLoaderInitializeCallback)
            this.onConfigLoaderInitializeCallback(true, this.config);
	}
    
    httpGet(url: string, callback: (isError: boolean, responseText: string) => void) {
        //console.log("[httpGet]" + url)

        var xhr = cc.loader.getXMLHttpRequest();
        xhr.onreadystatechange = () => {
            if (xhr.readyState !== 4)
                return;

            if (xhr.status >= 200 && xhr.status < 300) {
                callback(false, xhr.responseText);
            }
            else {
                callback(true, "");
            }
        };
        xhr.onerror = () => {
            callback(true, "");
        };
        xhr.open("GET", url, true);
        xhr.send();
    }
}