window.startGame = function() {
    window.boot()
}

window.pauseGame = function() {
    cc.game.pause()
}

window.resumeGame = function() {
    cc.game.resume()
}

window.muteAudio = function() {
    cc.audioEngine.pauseAll()
}

window.unmuteAudio = function() {
    cc.audioEngine.resumeAll()
}

console.log("entry file loaded")

function b64ToUint6(nChr) {
    return nChr > 64 && nChr < 91
        ? nChr - 65 : nChr > 96 && nChr < 123
            ? nChr - 71 : nChr > 47 && nChr < 58
                ? nChr + 4 : nChr === 43
                    ? 62 : nChr === 47
                        ? 63 : 0
}

/** 官网范例+1,看不懂+1,作用是将base64编码的字符串转为ArrayBuffer */
function base64DecToArr(sBase64, nBlockSize) {
    var sB64Enc = sBase64.replace(/[^A-Za-z0-9\+\/]/g, ""), nInLen = sB64Enc.length
    var nOutLen = nBlockSize ? Math.ceil((nInLen * 3 + 1 >>> 2) / nBlockSize) * nBlockSize : nInLen * 3 + 1 >>> 2
    var aBytes = new Uint8Array(nOutLen)
    for (var nMod3, nMod4, nUint24 = 0, nOutIdx = 0, nInIdx = 0; nInIdx < nInLen; nInIdx++) {
        nMod4 = nInIdx & 3
        nUint24 |= b64ToUint6(sB64Enc.charCodeAt(nInIdx)) << 18 - 6 * nMod4
        if (nMod4 === 3 || nInLen - nInIdx === 1) {
            for (nMod3 = 0; nMod3 < 3 && nOutIdx < nOutLen; nMod3++ , nOutIdx++) {
                aBytes[nOutIdx] = nUint24 >>> (16 >>> nMod3 & 24) & 255;
            }
            nUint24 = 0
        }
    }
    return aBytes
}

/**
 * 修改部分资源的载入方式,可以根据项目中实际用到的资源进行修改
 * - [注意] assetMap 是自己定义的,名称可以修改
 */

function loadJs(item, _, callback) {
    if (!item.startsWith("assets")) {
        item = "assets/" + item
    }
    eval(assetMap[item])
    callback(null, null)
}

function loadJson(item, _, callback) {
    if (!item.startsWith("assets")) {
        item = "assets/" + item
    }
    callback(null, JSON.parse(assetMap[item]))
}

var assetMap = window.assetMap;

cc.assetManager.downloader.register({
    "bundle": function (item, _, callback) {
        var bundleJsKey = Object.keys(assetMap).find(key => key.includes(item + "/index") && key.endsWith(".js"))
        if (!bundleJsKey) {
            console.error(`bundle js ${item} not found`)
        }
        loadJs(bundleJsKey, _, (a1, data) => {
            console.log("bundle js loaded:", bundleJsKey)
        })

        var bundleJsonKey = Object.keys(assetMap).find(key => key.includes(item + "/config") && key.endsWith(".json"))
        if (!bundleJsonKey) {
            console.error(`bundle ${item} not found`)
        }
        loadJson(bundleJsonKey, _, (a1, data) => 
        {
            var completeData = data;
            completeData.base = "assets/" + item + "/"
            callback(null, completeData)
        })
    },
    ".json": loadJson,
    ".plist": function (item, _, callback) {
        callback(null, assetMap[item])
    },
    ".png": function (item, _, callback) {
        var img = new Image()
        img.src = "data:image/png;base64," + assetMap[item]   // 注意需要给base64编码添加前缀
        callback(null, img)
    },
    ".jpg": function (item, _, callback) {
        var img = new Image()
        img.src = "data:image/jpeg;base64," + assetMap[item]
        callback(null, img)
    },
    ".webp": function (item, _, callback) {
        var img = new Image()
        img.src = "data:image/webp;base64," + assetMap[item]
        callback(null, img)
    },
    ".mp3": function (item, _, callback) {
        // 只支持以webAudio形式播放的声音
        // 将base64编码的声音文件转化为ArrayBuffer
        cc.sys.__audioSupport.context.decodeAudioData(
            base64DecToArr(assetMap[item]).buffer,
            // success
            function (buffer) {
                callback(null, buffer)
            },
            // fail
            function (buffer) {
                callback(new Error("mp3-res-fail"), null)
            }
        )
    },
})