use clap::{Parser, Subcommand};
use modlist::{
    config::Cfg,
    db::{config_get_current_list, lists_get, lists_get_all_ids},
    download, export, get_current_list, import, list_add, list_change, list_remove, list_version,
    mod_add, mod_remove, update, IDSelector, List, Modloader, VersionLevel, list_list, AddMod,
};

#[derive(Parser)]
#[command(author, version, about)]
struct Cli {
    #[command(subcommand)]
    command: Commands,

    /// config file path
    #[arg(short, long)]
    config: Option<String>,
}

#[derive(Subcommand)]
enum Commands {
    r#Mod {
        #[command(subcommand)]
        command: ModCommands,
    },
    List {
        #[command(subcommand)]
        command: ListCommands,

        /// Force GameVersion update
        #[arg(long)]
        force_gameupdate: bool,
    },
    Download {
        /// download all lists
        #[arg(short, long)]
        all: bool,

        /// clean all mods before downloading them
        #[arg(short, long)]
        clean: bool,

        /// remove disabled versions
        #[arg(short, long)]
        remove: bool,
        
        /// optional List selection, else default list will be used
        #[arg(short, long)]
        list: Option<String>,
    },
    Update {
        /// download all lists
        #[arg(short, long)]
        all: bool,

        /// directly download updated mods
        #[arg(short, long)]
        download: bool,

        /// clean all mods before downloading them
        #[arg(short, long)]
        clean: bool,

        /// delete disabled versions
        #[arg(short, long)]
        remove: bool,

        /// optional List selection, else default list will be used
        #[arg(short, long)]
        list: Option<String>,
    },
    Import {
        #[arg(short, long)]
        file: Option<String>,

        /// directly download imported mods
        #[arg(short, long)]
        download: bool,
    },
    Export {
        /// the list you want to export
        list: Option<String>,
    },
    Test
}

#[derive(Subcommand)]
enum ModCommands {
    Add {
        /// id of the mod/version
        id: String,

        /// set id mode to version
        #[arg(short, long)]
        version: bool,

        /// directly download the mod
        #[arg(short, long)]
        download: bool,

        /// lock the version added
        #[arg(/* short , */long)]
        lock: bool,

        /// optional List selection, else default list will be used
        #[arg(short, long)]
        list: Option<String>,
    },
    Remove {
        /// id, name or title of the mod
        id: String,

        /// optional List selection, else default list will be used
        #[arg(short, long)]
        list: Option<String>,
    },
}

#[derive(Subcommand)]
enum ListCommands {
    Add {
        /// list id
        id: String,

        directory: String,

        modloader: Option<String>,

        version: Option<String>,
    },
    Remove {
        /// id, name or title of the list
        id: String,
    },
    List,
    Change {
        /// id of the list to change to
        id: String,
    },
    Version {
        /// list id
        id: String,
        /// desired minecraft version
        version: String,

        /// directly download updated mods
        #[arg(long, short)]
        download: bool,

        /// delete disabled versions
        #[arg(short, long)]
        remove: bool,
    },
}

#[tokio::main]
async fn main() {
    let cli = Cli::parse();

    let config = Cfg::init(cli.config).await.unwrap();

    match cli.command {
        Commands::Mod { command } => {
            match command {
                ModCommands::Add {
                    id,
                    version,
                    list,
                    download,
                    lock,
                } => {
                    let listf = match list {
                        Some(list) => lists_get(&config, &list).unwrap(),
                        None => lists_get(
                            &config,
                            &config_get_current_list(&config).unwrap(),
                        )
                        .unwrap(),
                    };

                    let marked_id = match version {
                        true => IDSelector::VersionID(id),
                        false => IDSelector::ModificationID(id),
                    };

                    let add_id = AddMod { id: marked_id, set_version: lock };

                    mod_add(&config, vec![add_id], listf, download).await
                }
                ModCommands::Remove { id, list } => {
                    let listf = match list {
                        Some(list) => lists_get(&config, &list).unwrap(),
                        None => lists_get(
                            &config,
                            &config_get_current_list(&config).unwrap(),
                        )
                        .unwrap(),
                    };
                    mod_remove(&config, &id, listf)
                }
            }
        }
        Commands::List { command, force_gameupdate } => {
            match command {
                ListCommands::Add {
                    id,
                    directory,
                    modloader,
                    version,
                } => {
                    let ml = match modloader {
                        Some(ml) => Modloader::from(&ml).unwrap(),
                        None => config.defaults.modloader.clone(),
                    };

                    let versions_path = &config.versions;
                    let ver = match version {
                        Some(ver) => VersionLevel::from(&ver).get(versions_path, force_gameupdate).await.unwrap(),
                        None => config.defaults.version.clone().get(versions_path, force_gameupdate).await.unwrap(),
                    };

                    list_add(&config, &id, &ver, &ml, &directory)
                }
                ListCommands::Remove { id } => list_remove(&config, id),
                ListCommands::List => {
                    list_list(&config)
                }
                ListCommands::Change { id } => list_change(&config, id),
                ListCommands::Version {
                    id,
                    version,
                    download,
                    remove,
                } => list_version(&config, &id, version, download, remove).await,
            }
        }
        Commands::Update {
            all,
            download,
            clean,
            remove,
            list
        } => {
            let mut liststack: Vec<List> = vec![];
            if all {
                let list_ids = lists_get_all_ids(&config).unwrap();
                for id in list_ids {
                    liststack.push(lists_get(&config, &id).unwrap());
                }
            } else {
                let current = match list  {
                    Some(l) => lists_get(&config, &l).unwrap(),
                    None => get_current_list(&config).unwrap(),
                };
                liststack.push(current)
            }

            update(&config, liststack, clean, download, remove).await
        }
        Commands::Download { all, clean, remove, list } => {
            let mut liststack: Vec<List> = vec![];
            if all {
                let list_ids = lists_get_all_ids(&config).unwrap();
                for id in list_ids {
                    liststack.push(lists_get(&config, &id).unwrap());
                }
            } else {
                let current = match list  {
                    Some(l) => lists_get(&config, &l).unwrap(),
                    None => get_current_list(&config).unwrap(),
                };
                liststack.push(current)
            }

         download(&config, liststack, clean, remove).await
        },
        Commands::Import { file, download } => {
            let filestr: String = match file {
                Some(args) => args,
                None => dirs::home_dir()
                    .unwrap()
                    .join("mlexport.toml")
                    .into_os_string()
                    .into_string()
                    .unwrap(),
            };

            import(&config, &filestr, download).await
        }
        Commands::Export { list } => export(&config, list),
        Commands::Test => Ok(()),
    }
    .unwrap();
}