using System;
using System.CommandLine;
using System.CommandLine.Binding;
using System.CommandLine.Parsing;
using System.Threading.Tasks;

namespace BBDown;

internal static class CommandLineInvoker
{
    private static readonly Argument<string> Url = new("url", description: "视频地址 或 av|bv|BV|ep|ss");
    private static readonly Option<bool> UseTvApi = new(["--use-tv-api", "-tv"], "使用TV端解析模式");
    private static readonly Option<bool> UseAppApi = new(["--use-app-api", "-app"], "使用APP端解析模式");
    private static readonly Option<bool> UseIntlApi = new(["--use-intl-api", "-intl"], "使用国际版(东南亚视频)解析模式");
    private static readonly Option<bool> UseMP4box = new(["--use-mp4box"], "使用MP4Box来混流");
    private static readonly Option<string> EncodingPriority = new(["--encoding-priority", "-e"], "视频及音频编码的选择优先级, 用逗号分割 例: \"hevc,av1,avc,flac,eac3,m4a\"");
    private static readonly Option<string> DfnPriority = new(["--dfn-priority", "-q"], "画质优先级,用逗号分隔 例: \"8K 超高清, 1080P 高码率, HDR 真彩, 杜比视界\"");
    private static readonly Option<bool> OnlyShowInfo = new(["--only-show-info", "-info"], "仅解析而不进行下载");
    private static readonly Option<bool> HideStreams = new(["--hide-streams", "-hs"], "不要显示所有可用音视频流");
    private static readonly Option<bool> Interactive = new(["--interactive", "-ia"], "交互式选择清晰度");
    private static readonly Option<bool> ShowAll = new(["--show-all"], "展示所有分P标题");
    private static readonly Option<bool> UseAria2c = new(["--use-aria2c", "-aria2"], "调用aria2c进行下载(你需要自行准备好二进制可执行文件)");
    private static readonly Option<string> Aria2cArgs = new(["--aria2c-args"], "调用aria2c的附加参数(默认参数包含\"-x16 -s16 -j16 -k 5M\", 使用时注意字符串转义)");
    private static readonly Option<bool> MultiThread = new(["--multi-thread", "-mt"], "使用多线程下载(默认开启)");
    private static readonly Option<string> SelectPage = new(["--select-page", "-p"], "选择指定分p或分p范围: (-p 8 或 -p 1,2 或 -p 3-5 或 -p ALL 或 -p LAST 或 -p 3,5,LATEST)");
    private static readonly Option<bool> SimplyMux = new(["--simply-mux"], "精简混流，不增加描述、作者等信息");
    private static readonly Option<bool> AudioOnly = new(["--audio-only"], "仅下载音频");
    private static readonly Option<bool> VideoOnly = new(["--video-only"], "仅下载视频");
    private static readonly Option<bool> DanmakuOnly = new(["--danmaku-only"], "仅下载弹幕");
    private static readonly Option<bool> CoverOnly = new(["--cover-only"], "仅下载封面");
    private static readonly Option<bool> SubOnly = new(["--sub-only"], "仅下载字幕");
    private static readonly Option<bool> Debug = new(["--debug"], "输出调试日志");
    private static readonly Option<bool> SkipMux = new(["--skip-mux"], "跳过混流步骤");
    private static readonly Option<bool> SkipSubtitle = new(["--skip-subtitle"], "跳过字幕下载");
    private static readonly Option<bool> SkipCover = new(["--skip-cover"], "跳过封面下载");
    private static readonly Option<bool> ForceHttp = new(["--force-http"], "下载音视频时强制使用HTTP协议替换HTTPS(默认开启)");
    private static readonly Option<bool> DownloadDanmaku = new(["--download-danmaku", "-dd"], "下载弹幕");
    private static readonly Option<string> DownloadDanmakuFormats = new(["--download-danmaku-formats", "-ddf"], $"指定需下载的弹幕格式, 用逗号分隔, 可选 {string.Join('/', BBDownDanmakuFormatInfo.AllFormatNames)}, 默认: \"{string.Join(',', BBDownDanmakuFormatInfo.AllFormatNames)}\"");
    private static readonly Option<bool> SkipAi = new(["--skip-ai"], description: "跳过AI字幕下载(默认开启)");
    private static readonly Option<bool> VideoAscending = new(["--video-ascending"], "视频升序(最小体积优先)");
    private static readonly Option<bool> AudioAscending = new(["--audio-ascending"], "音频升序(最小体积优先)");
    private static readonly Option<bool> AllowPcdn = new(["--allow-pcdn"], "不替换PCDN域名, 仅在正常情况与--upos-host均无法下载时使用");
    private static readonly Option<string> Language = new(["--language"], "设置混流的音频语言(代码), 如chi, jpn等");
    private static readonly Option<string> UserAgent = new(["--user-agent", "-ua"], "指定user-agent, 否则使用随机user-agent");
    private static readonly Option<string> Cookie = new(["--cookie", "-c"], "设置字符串cookie用以下载网页接口的会员内容");
    private static readonly Option<string> AccessToken = new(["--access-token", "-token"], "设置access_token用以下载TV/APP接口的会员内容");
    private static readonly Option<string> WorkDir = new(["--work-dir"], "设置程序的工作目录");
    private static readonly Option<string> FFmpegPath = new(["--ffmpeg-path"], "设置ffmpeg的路径");
    private static readonly Option<string> Mp4boxPath = new(["--mp4box-path"], "设置mp4box的路径");
    private static readonly Option<string> Aria2cPath = new(["--aria2c-path"], "设置aria2c的路径");
    private static readonly Option<string> UposHost = new(["--upos-host"], "自定义upos服务器");
    private static readonly Option<bool> ForceReplaceHost = new(["--force-replace-host"], "强制替换下载服务器host(默认开启)");
    private static readonly Option<bool> SaveArchivesToFile = new(["--save-archives-to-file"], "将下载过的视频记录到本地文件中, 用于后续跳过下载同个视频");
    private static readonly Option<string> DelayPerPage = new(["--delay-per-page"], "设置下载合集分P之间的下载间隔时间(单位: 秒, 默认无间隔)");
    private static readonly Option<string> FilePattern = new(["--file-pattern", "-F"], 
        $"使用内置变量自定义单P存储文件名:\r\n\r\n" + 
        $"<videoTitle>: 视频主标题\r\n" + 
        $"<pageNumber>: 视频分P序号\r\n" + 
        $"<pageNumberWithZero>: 视频分P序号(前缀补零)\r\n" + 
        $"<pageTitle>: 视频分P标题\r\n" + 
        $"<bvid>: 视频BV号\r\n" + 
        $"<aid>: 视频aid\r\n" + 
        $"<cid>: 视频cid\r\n" + 
        $"<dfn>: 视频清晰度\r\n" + 
        $"<res>: 视频分辨率\r\n" + 
        $"<fps>: 视频帧率\r\n" + 
        $"<videoCodecs>: 视频编码\r\n" + 
        $"<videoBandwidth>: 视频码率\r\n" + 
        $"<audioCodecs>: 音频编码\r\n" + 
        $"<audioBandwidth>: 音频码率\r\n" + 
        $"<ownerName>: 上传者名称\r\n" + 
        $"<ownerMid>: 上传者mid\r\n" + 
        $"<publishDate>: 收藏夹/番剧/合集发布时间\r\n" + 
        $"<videoDate>: 视频发布时间(分p视频发布时间与<publishDate>相同)\r\n" + 
        $"<apiType>: API类型(TV/APP/INTL/WEB)\r\n\r\n" + 
        $"默认为: {Program.SinglePageDefaultSavePath}\r\n");
    private static readonly Option<string> MultiFilePattern = new(["--multi-file-pattern", "-M"], $"使用内置变量自定义多P存储文件名:\r\n\r\n默认为: {Program.MultiPageDefaultSavePath}\r\n");
    private static readonly Option<string> Host = new(["--host"], "指定BiliPlus host(使用BiliPlus需要access_token, 不需要cookie, 解析服务器能够获取你账号的大部分权限!)");
    private static readonly Option<string> EpHost = new(["--ep-host"], "指定BiliPlus EP host(用于代理api.bilibili.com/pgc/view/web/season, 大部分解析服务器不支持代理该接口)");
    private static readonly Option<string> TvHost = new(["--tv-host"], "自定义tv端接口请求Host(用于代理api.snm0516.aisee.tv)");
    private static readonly Option<string> Area = new(["--area"], "(hk|tw|th) 使用BiliPlus时必选, 指定BiliPlus area");
    private static readonly Option<string> ConfigFile = new(["--config-file"], "读取指定的BBDown本地配置文件(默认为: BBDown.config)");//以下仅为兼容旧版本命令行, 不建议使用
    private static readonly Option<string> Aria2cProxy = new(["--aria2c-proxy"], "调用aria2c进行下载时的代理地址配置") { IsHidden = true };
    private static readonly Option<bool> OnlyHevc = new(["--only-hevc", "-hevc"], "只下载hevc编码") { IsHidden = true };
    private static readonly Option<bool> OnlyAvc = new(["--only-avc", "-avc"], "只下载avc编码") { IsHidden = true };
    private static readonly Option<bool> OnlyAv1 = new(["--only-av1", "-av1"], "只下载av1编码") { IsHidden = true };
    private static readonly Option<bool> AddDfnSubfix = new(["--add-dfn-subfix"], "为文件加入清晰度后缀, 如XXX[1080P 高码率]") { IsHidden = true };
    private static readonly Option<bool> NoPaddingPageNum = new(["--no-padding-page-num"], "不给分P序号补零") { IsHidden = true };
    private static readonly Option<bool> BandwithAscending = new(["--bandwith-ascending"], "比特率升序(最小体积优先)") { IsHidden = true };


    class MyOptionBinder : BinderBase<MyOption>
    {
        protected override MyOption GetBoundValue(BindingContext bindingContext)
        {
            var option = new MyOption
            {
                Url = bindingContext.ParseResult.GetValueForArgument(Url)
            };

            if (bindingContext.ParseResult.HasOption(UseTvApi)) option.UseTvApi = bindingContext.ParseResult.GetValueForOption(UseTvApi)!;
            if (bindingContext.ParseResult.HasOption(UseAppApi)) option.UseAppApi = bindingContext.ParseResult.GetValueForOption(UseAppApi)!;
            if (bindingContext.ParseResult.HasOption(UseIntlApi)) option.UseIntlApi = bindingContext.ParseResult.GetValueForOption(UseIntlApi)!;
            if (bindingContext.ParseResult.HasOption(UseMP4box)) option.UseMP4box = bindingContext.ParseResult.GetValueForOption(UseMP4box)!;
            if (bindingContext.ParseResult.HasOption(EncodingPriority)) option.EncodingPriority = bindingContext.ParseResult.GetValueForOption(EncodingPriority)!;
            if (bindingContext.ParseResult.HasOption(DfnPriority)) option.DfnPriority = bindingContext.ParseResult.GetValueForOption(DfnPriority)!;
            if (bindingContext.ParseResult.HasOption(OnlyShowInfo)) option.OnlyShowInfo = bindingContext.ParseResult.GetValueForOption(OnlyShowInfo)!;
            if (bindingContext.ParseResult.HasOption(ShowAll)) option.ShowAll = bindingContext.ParseResult.GetValueForOption(ShowAll)!;
            if (bindingContext.ParseResult.HasOption(UseAria2c)) option.UseAria2c = bindingContext.ParseResult.GetValueForOption(UseAria2c)!;
            if (bindingContext.ParseResult.HasOption(Interactive)) option.Interactive = bindingContext.ParseResult.GetValueForOption(Interactive)!;
            if (bindingContext.ParseResult.HasOption(HideStreams)) option.HideStreams = bindingContext.ParseResult.GetValueForOption(HideStreams)!;
            if (bindingContext.ParseResult.HasOption(MultiThread)) option.MultiThread = bindingContext.ParseResult.GetValueForOption(MultiThread)!;
            if (bindingContext.ParseResult.HasOption(SimplyMux)) option.SimplyMux = bindingContext.ParseResult.GetValueForOption(SimplyMux)!;
            if (bindingContext.ParseResult.HasOption(VideoOnly)) option.VideoOnly = bindingContext.ParseResult.GetValueForOption(VideoOnly)!;
            if (bindingContext.ParseResult.HasOption(AudioOnly)) option.AudioOnly = bindingContext.ParseResult.GetValueForOption(AudioOnly)!;
            if (bindingContext.ParseResult.HasOption(DanmakuOnly)) option.DanmakuOnly = bindingContext.ParseResult.GetValueForOption(DanmakuOnly)!;
            if (bindingContext.ParseResult.HasOption(CoverOnly)) option.CoverOnly = bindingContext.ParseResult.GetValueForOption(CoverOnly)!;
            if (bindingContext.ParseResult.HasOption(SubOnly)) option.SubOnly = bindingContext.ParseResult.GetValueForOption(SubOnly)!;
            if (bindingContext.ParseResult.HasOption(Debug)) option.Debug = bindingContext.ParseResult.GetValueForOption(Debug)!;
            if (bindingContext.ParseResult.HasOption(SkipMux)) option.SkipMux = bindingContext.ParseResult.GetValueForOption(SkipMux)!;
            if (bindingContext.ParseResult.HasOption(SkipSubtitle)) option.SkipSubtitle = bindingContext.ParseResult.GetValueForOption(SkipSubtitle)!;
            if (bindingContext.ParseResult.HasOption(SkipCover)) option.SkipCover = bindingContext.ParseResult.GetValueForOption(SkipCover)!;
            if (bindingContext.ParseResult.HasOption(ForceHttp)) option.ForceHttp = bindingContext.ParseResult.GetValueForOption(ForceHttp)!;
            if (bindingContext.ParseResult.HasOption(DownloadDanmaku)) option.DownloadDanmaku = bindingContext.ParseResult.GetValueForOption(DownloadDanmaku)!;
            if (bindingContext.ParseResult.HasOption(DownloadDanmakuFormats)) option.DownloadDanmakuFormats = bindingContext.ParseResult.GetValueForOption(DownloadDanmakuFormats)!;
            if (bindingContext.ParseResult.HasOption(SkipAi)) option.SkipAi = bindingContext.ParseResult.GetValueForOption(SkipAi)!;
            if (bindingContext.ParseResult.HasOption(VideoAscending)) option.VideoAscending = bindingContext.ParseResult.GetValueForOption(VideoAscending)!;
            if (bindingContext.ParseResult.HasOption(AudioAscending)) option.AudioAscending = bindingContext.ParseResult.GetValueForOption(AudioAscending)!;
            if (bindingContext.ParseResult.HasOption(AllowPcdn)) option.AllowPcdn = bindingContext.ParseResult.GetValueForOption(AllowPcdn)!;
            if (bindingContext.ParseResult.HasOption(FilePattern)) option.FilePattern = bindingContext.ParseResult.GetValueForOption(FilePattern)!;
            if (bindingContext.ParseResult.HasOption(MultiFilePattern)) option.MultiFilePattern = bindingContext.ParseResult.GetValueForOption(MultiFilePattern)!;
            if (bindingContext.ParseResult.HasOption(SelectPage)) option.SelectPage = bindingContext.ParseResult.GetValueForOption(SelectPage)!;
            if (bindingContext.ParseResult.HasOption(Language)) option.Language = bindingContext.ParseResult.GetValueForOption(Language)!;
            if (bindingContext.ParseResult.HasOption(UserAgent)) option.UserAgent = bindingContext.ParseResult.GetValueForOption(UserAgent)!;
            if (bindingContext.ParseResult.HasOption(Cookie)) option.Cookie = bindingContext.ParseResult.GetValueForOption(Cookie)!;
            if (bindingContext.ParseResult.HasOption(AccessToken)) option.AccessToken = bindingContext.ParseResult.GetValueForOption(AccessToken)!;
            if (bindingContext.ParseResult.HasOption(Aria2cArgs)) option.Aria2cArgs = bindingContext.ParseResult.GetValueForOption(Aria2cArgs)!;
            if (bindingContext.ParseResult.HasOption(WorkDir)) option.WorkDir = bindingContext.ParseResult.GetValueForOption(WorkDir)!;
            if (bindingContext.ParseResult.HasOption(FFmpegPath)) option.FFmpegPath = bindingContext.ParseResult.GetValueForOption(FFmpegPath)!;
            if (bindingContext.ParseResult.HasOption(Mp4boxPath)) option.Mp4boxPath = bindingContext.ParseResult.GetValueForOption(Mp4boxPath)!;
            if (bindingContext.ParseResult.HasOption(Aria2cPath)) option.Aria2cPath = bindingContext.ParseResult.GetValueForOption(Aria2cPath)!;
            if (bindingContext.ParseResult.HasOption(UposHost)) option.UposHost = bindingContext.ParseResult.GetValueForOption(UposHost)!;
            if (bindingContext.ParseResult.HasOption(ForceReplaceHost)) option.ForceReplaceHost = bindingContext.ParseResult.GetValueForOption(ForceReplaceHost)!;
            if (bindingContext.ParseResult.HasOption(SaveArchivesToFile)) option.SaveArchivesToFile = bindingContext.ParseResult.GetValueForOption(SaveArchivesToFile)!;
            if (bindingContext.ParseResult.HasOption(DelayPerPage)) option.DelayPerPage = bindingContext.ParseResult.GetValueForOption(DelayPerPage)!;
            if (bindingContext.ParseResult.HasOption(Host)) option.Host = bindingContext.ParseResult.GetValueForOption(Host)!;
            if (bindingContext.ParseResult.HasOption(EpHost)) option.EpHost = bindingContext.ParseResult.GetValueForOption(EpHost)!;
            if (bindingContext.ParseResult.HasOption(TvHost)) option.TvHost = bindingContext.ParseResult.GetValueForOption(TvHost)!;
            if (bindingContext.ParseResult.HasOption(Area)) option.Area = bindingContext.ParseResult.GetValueForOption(Area)!;
            if (bindingContext.ParseResult.HasOption(ConfigFile)) option.ConfigFile = bindingContext.ParseResult.GetValueForOption(ConfigFile)!;
            if (bindingContext.ParseResult.HasOption(Aria2cProxy)) option.Aria2cProxy = bindingContext.ParseResult.GetValueForOption(Aria2cProxy)!;
            if (bindingContext.ParseResult.HasOption(OnlyHevc)) option.OnlyHevc = bindingContext.ParseResult.GetValueForOption(OnlyHevc)!;
            if (bindingContext.ParseResult.HasOption(OnlyAvc)) option.OnlyAvc = bindingContext.ParseResult.GetValueForOption(OnlyAvc)!;
            if (bindingContext.ParseResult.HasOption(OnlyAv1)) option.OnlyAv1 = bindingContext.ParseResult.GetValueForOption(OnlyAv1)!;
            if (bindingContext.ParseResult.HasOption(AddDfnSubfix)) option.AddDfnSubfix = bindingContext.ParseResult.GetValueForOption(AddDfnSubfix)!;
            if (bindingContext.ParseResult.HasOption(NoPaddingPageNum)) option.NoPaddingPageNum = bindingContext.ParseResult.GetValueForOption(NoPaddingPageNum)!;
            if (bindingContext.ParseResult.HasOption(BandwithAscending)) option.BandwithAscending = bindingContext.ParseResult.GetValueForOption(BandwithAscending)!;
            return option;
        }
    }

    public static RootCommand GetRootCommand(Func<MyOption, Task> action)
    {
        var rootCommand = new RootCommand
        {
            Url,
            UseTvApi,
            UseAppApi,
            UseIntlApi,
            UseMP4box,
            EncodingPriority,
            DfnPriority,
            OnlyShowInfo,
            ShowAll,
            UseAria2c,
            Interactive,
            HideStreams,
            MultiThread,
            VideoOnly,
            AudioOnly,
            DanmakuOnly,
            SubOnly,
            CoverOnly,
            Debug,
            SkipMux,
            SkipSubtitle,
            SkipCover,
            ForceHttp,
            DownloadDanmaku,
            DownloadDanmakuFormats,
            SkipAi,
            VideoAscending,
            AudioAscending,
            AllowPcdn,
            FilePattern,
            MultiFilePattern,
            SelectPage,
            Language,
            UserAgent,
            Cookie,
            AccessToken,
            Aria2cArgs,
            WorkDir,
            FFmpegPath,
            Mp4boxPath,
            Aria2cPath,
            UposHost,
            ForceReplaceHost,
            SaveArchivesToFile,
            DelayPerPage,
            Host,
            EpHost,
            TvHost,
            Area,
            ConfigFile,
            Aria2cProxy,
            OnlyHevc,
            OnlyAvc,
            OnlyAv1,
            AddDfnSubfix,
            NoPaddingPageNum,
            BandwithAscending
        };

        rootCommand.SetHandler(async (myOption) => await action(myOption), new MyOptionBinder());

        return rootCommand;
    }
}