export const enum UserAgentType {
    None = 0,
    /**
     * 安卓平板设备
     */
    Tablet = 1 << 1,

    DesktopOthers = 1 << 2,
    DesktopSafari = 1 << 3,
    DesktopChrome = 1 << 4,
    DesktopFirefox = 1 << 5,
    DesktopIE = 1 << 6,
    DesktopEdge = 1 << 7,

    Desktop = DesktopOthers |
        DesktopSafari |
        DesktopChrome |
        DesktopFirefox |
        DesktopIE |
        DesktopEdge,

    IPhone = 1 << 8,
    IPad = 1 << 9,
    /**
     * 安卓手机设备
     */
    Andriod = 1 << 10,

    /**
     * 移动设备（不含包平板设备）
     */
    MobilePhone = IPhone | Andriod,

    /**
     * 所有移动设备，包含手机+平板
     */
    Mobile = MobilePhone | Tablet | IPhone,
}

export class UserAgentHelper {
    private static contains(source: string, match: string) {
        return source.indexOf(match) > -1;
    }

    private static containsAll(source: string, matches: string[]) {
        for (const item of matches) {
            if (!UserAgentHelper.contains(source, item)) {
                return false;
            }
        }
        return true;
    }

    private static containsAny(source: string, matches: string[]) {
        for (const item of matches) {
            if (UserAgentHelper.contains(source, item)) {
                return true;
            }
        }
        return false;
    }

    public static getType(ua: string) {
        const lower = ua.toLowerCase();

        if (UserAgentHelper.contains(lower, "ipad")) {
            return UserAgentType.IPad;
        }

        if (UserAgentHelper.contains(lower, "android_tablet")) {
            return UserAgentType.Tablet;
        }

        if (UserAgentHelper.contains(lower, "iphone")) {
            return UserAgentType.IPhone;
        }

        if (UserAgentHelper.contains(lower, "ipod")) {
            return UserAgentType.IPhone;
        }

        if (UserAgentHelper.containsAny(lower, ["android", "mobile"])) {
            return UserAgentType.Andriod;
        }

        if (UserAgentHelper.contains(lower, "safari")) {
            return UserAgentType.DesktopSafari;
        }

        if (UserAgentHelper.containsAny(lower, ["edge", "edg"])) {
            return UserAgentType.DesktopEdge;
        }

        if (UserAgentHelper.contains(lower, "trident")) {
            return UserAgentType.DesktopIE;
        }

        if (UserAgentHelper.contains(lower, "firefox")) {
            return UserAgentType.DesktopFirefox;
        }

        if (UserAgentHelper.contains(lower, "chrome")) {
            return UserAgentType.DesktopChrome;
        }

        if (UserAgentHelper.containsAny(lower, ["360", "baidu", "qq"])) {
            return UserAgentType.DesktopOthers;
        }

        return UserAgentType.None;
    }

    public static isMobile(ua: string) {
        const type = UserAgentHelper.getType(ua);
        return type === UserAgentType.Andriod || type === UserAgentType.IPhone;
    }
}