os.importPaths.add('/usr/local/axe/')
const importConfig = import("axe_store_config")


const formattedConfig = function(config) {
    var mirror = config['mirror']
    var urls = mirror['urls']
    var new_urls = []
    var i = 0
    var l = urls.length()
    while (i < l) {
        var url = urls[i]
        if (url.endswith('/')) {
            url = url.cut(0, url.length() - 1)
            config['mirror']['urls'][i] = url
        }
        i += 1
    }
    return config
}


const Config = class() {
    // 定义一个 方法 (类里面的函数叫 方法, 单纯只是名字不同)
    // 注意这里定义函数的方式是很特殊的, 和平时定义函数不一样
    // new 是一个特殊的函数名字, 它会在实例化类的时候被调用(见下面的使用方法和说明)
    const new = function(config) {
        // 用 this.变量名 来创造一个只有类的实例才能访问的变量
        // 定义实例变量的时候必须用 var 或 const 来修饰
        const _c = formattedConfig(config)
        const this.config = _c
    }

    const mirrorUrl = function() {
        const config = this.config
        const mirror = config['mirror']
        const urls = mirror['urls']
        const index = mirror['active_mirror_url_index']
        const url = urls[index]
        return url
    }

    const switchedMirrorUrl = function(originalUrl) {
        const config = this.config
        const mirror = config['mirror']
        const urls = mirror['urls']
        const l = urls.length()
        var i = 0
        while (i < l) {
            const mirrorUrl = urls[i]
            if (originalUrl.has(mirrorUrl)) {
                const nextIndex = (i + 1) % l
                const nextUrl = urls[nextIndex]
                const newUrl = originalUrl.replace(mirrorUrl, nextUrl)
                return newUrl
            }
            i += 1
        }
    }
}

const config = Config.new(importConfig.axeConfig)