use std::path::PathBuf;
use clap::{Args, Parser, Subcommand};

#[derive(Args, Debug)]
pub struct ProfileSelectArgs {
    /// The name of the profile to select.
    #[arg(index = 1)]
    pub profile: String
}

#[derive(Args, Debug)]
pub struct ProfileCreateArgs {
    /// The name of the new profile.
    #[arg(index = 1)]
    pub name: String,

    /// Clone profile information from an existing profile.
    #[arg(long, short = 'c')]
    pub clone: Option<String>,

    /// The Minecraft version to be launched by this profile. Will use the latest release by default.
    #[arg(long, short = 'v')]
    pub version: Option<String>,

    /// The instance in which this profile will launch the game. By default, will create a new instance
    /// with the same name as this profile.
    #[arg(long, short = 'i')]
    pub instance: Option<String>
}

#[derive(Subcommand, Debug)]
pub enum ProfileCommand {
    Select(ProfileSelectArgs),
    Create(ProfileCreateArgs),
    List
}

#[derive(Args, Debug)]
pub struct ProfileArgs {
    #[command(subcommand)]
    subcmd: Option<ProfileCommand>
}

impl ProfileArgs {
    pub fn command(&self) -> &ProfileCommand {
        self.subcmd.as_ref().unwrap_or(&ProfileCommand::List)
    }
}

#[derive(Subcommand, Debug)]
pub enum RootCommand {
    Profile(ProfileArgs),
    Instance,
    Launch
}

#[derive(Parser, Debug)]
#[clap(version)]
pub struct Cli {
    /// Run the launcher in offline mode. The launcher will not attempt to make any requests using
    /// the network. The launcher _will_ verify the integrity of files required to launch the game,
    /// and refuse to launch the game with an error if it must download a file.
    #[arg(long, global = true)]
    pub offline: bool,

    /// Directory which the launcher will perform its work in. Defaults to an application-specific
    /// directory based on your OS.
    #[arg(long, global = true, value_hint = clap::ValueHint::DirPath)]
    pub home: Option<PathBuf>,

    #[command(subcommand)]
    pub subcmd: RootCommand
}