package main

import (
    //"flag"
    "context"
    //"fmt"
    "os"
    //"io"
    //"reflect"

    //"google.golang.org/api/option"
    //"google.golang.org/api/youtube/v3"
    "github.com/wader/goutubedl"
    "github.com/BurntSushi/toml"
    "github.com/charmbracelet/log"
    "github.com/alexflint/go-arg"
)



type _flags struct {
    Quiet       bool `arg:"-q,--quiet" help:"Output only warnings and errors."`
    Verbose     bool `arg:"-v,--verbose" help:"Enables debug output."`
    ConfigFile  string `arg:"-c,--config,env:YTVA_CONFIG" help:"Specifies the path to a TOML formatted configuration file." default:"config.toml"`
}

func (_flags) Description() string {
    return "YouTube Video Archive - Downloads videos in bulk automatically"
}

var Flags _flags



type ConfigFile struct {
    OutputDir       string
    Channels      []string
    YouTube         struct {
        VideoFormat     string
        AudioFormat     string
    }
}

var MainConfig ConfigFile



func main() {
    _ = arg.MustParse(&Flags)

    if Flags.Verbose {
        log.SetReportCaller(true)
        log.SetLevel(log.DebugLevel)
        if Flags.Quiet {
            log.Warn("Verbose and quiet specified. Defaulting to verbose.")
        }
    } else if Flags.Quiet {
        log.SetLevel(log.WarnLevel)
    }

    confFile, err := os.ReadFile(Flags.ConfigFile)
    if(err != nil) {
        log.Fatal(err)
    }

    confContent := string(confFile)

    _, err = toml.Decode(confContent, &MainConfig)

    log.Debug("", "config", MainConfig)

    goutubedl.Path = "yt-dlp"

    if _, err := os.Stat(MainConfig.OutputDir); err != nil {
        if os.IsNotExist(err) {
            if err := os.Mkdir(MainConfig.OutputDir, 0755); err != nil {
                log.Fatal(err)
            }
        } else {
            log.Fatal(err)
        }
    }

    for _, channel := range MainConfig.Channels {
        log.Info("==========================================================================================================")
        log.Infof("Channel URL: \"%s\"", channel)

        optType := goutubedl.TypeFromString["channel"]
        channel, err := goutubedl.New(context.Background(), channel,
            goutubedl.Options{
                Type: optType,
                PlaylistEnd: 2,
            },
        )
        if err != nil {
            log.Fatalf("Error creating YouTube service: %v", err)
        }

        log.Infof("Channel Name: %s", channel.Info.Channel)

        basePath := MainConfig.OutputDir+"/"+channel.Info.Channel+"/"

        if _, err := os.Stat(basePath); err != nil {
            if os.IsNotExist(err) {
                if err := os.Mkdir(basePath, 0755); err != nil {
                    log.Fatal(err)
                }
            } else {
                log.Fatal(err)
            }
        }

        for _, v := range channel.Info.Entries {
            log.Debugf("-----------------------------------------------------")
            log.Debugf("Title: %s", v.Title)
            log.Debugf("URL: %s", v.WebpageURL)
            log.Debugf("Playlist: %s", v.Playlist)
            log.Debugf("PublishedAt: %s", v.UploadDate)
            log.Debugf("IsLive: %t", v.IsLive)
            //log.Debugf("Description: %s\n", item.Snippet.Description)

            dirPath := basePath+"/"+v.Playlist+"/"
            if _, err := os.Stat(dirPath); err != nil {
                if os.IsNotExist(err) {
                    if err := os.Mkdir(dirPath, 0755); err != nil {
                        log.Fatal(err)
                    }
                } else {
                    log.Fatal(err)
                }
            }

            log.Infof("Downloading video: %s", v.Title)
            downloadVideo(v.WebpageURL, MainConfig.YouTube.VideoFormat, MainConfig.YouTube.AudioFormat, dirPath, 2^32)
        }
    }
}