/**
 * 初始化平台相关信息，确定MiddleMgr
 */
module.exports = {
    init (ns) {
        if (CC_EDITOR) {
            return;
        }

        this._getPlatformInit();
    },

    /**
     * 获取当前平台的初始化接口
     *
     * @returns
     */
    _getPlatformInit () {
        let channelId = this._getChannelId();
        G.ChannelId = Number(channelId);
        let sdkConfig = this._getSdkConfig(channelId);
        let sdkName = sdkConfig.sdk_name;
        let platform = cc.sys.platform;
        G.MiddleMgr = this._getMiddleMgr(platform, sdkName);
        G.MiddleMgr.sdkConfig = this._getSdkConfig(channelId);
        G.MiddleMgr.init();
    },

    /**
     * 获取MiddleMgr
     *
     * @param {String} platform 平台
     * @param {String} sdkName sdk名称
     * @returns {MiddleMgr}
     */
    _getMiddleMgr (platform, sdkName) {
        let MiddleMgrClass;
        switch (platform) {
            case cc.sys.MOBILE_BROWSER:
            case cc.sys.DESKTOP_BROWSER: {
                MiddleMgrClass = this._getWebMiddleMgrClass(sdkName);
                break;
            }
            default: {
                MiddleMgrClass = this._getWebMiddleMgrClass(sdkName);
                break;
            }
        }

        return new MiddleMgrClass();
    },

    /**
     * 获取Web平台对应的MiddleMgr
     *
     * @param {String} sdkName sdk名称
     * @returns {MiddleMgr}
     */
    _getWebMiddleMgrClass (sdkName) {
        let MiddleMgrClass;

        switch (sdkName) {
            default: {
                MiddleMgrClass = require('WebMiddleMgr');
                break;
            }
        }

        return MiddleMgrClass;
    },

    /**
     * 渠道号映射不同的在线参数打包配置
     *
     * @param {Integer} channelId
     * @returns {Object}
     */
    _getChannelId () {
        let channelId = 999;

        let platform = cc.sys.platform;
        switch (platform) {
            case cc.sys.MOBILE_BROWSER:
            case cc.sys.DESKTOP_BROWSER: {
                let searchParams = new URLSearchParams(window.location.search);
                channelId = searchParams.get('channel') || 999;
                break;
            }
        }

        return channelId;
    },

    /**
     * 渠道号映射不同的SDK打包配置
     * 
     * @param {Integer} channelId
     * @returns {Object}
     */
    _getSdkConfig (channelId) {
        let WebSDKConfig = require('AllSDKConfig');
        let sdkConfig = WebSDKConfig['ch' + channelId];
        if (!sdkConfig) {
            sdkConfig = WebSDKConfig['ch999'] || {};
            sdkConfig.channel = channelId;
        }

        return sdkConfig;
    }
};