use clap::{Args, Parser, Subcommand};
use thiserror::Error;
use tracing::Level;

#[derive(Debug, Parser)]
#[clap(version, about)]
pub struct CommandArgs {
    /// The path to a TOML or JSON configuration to use. This will me merged with all other configuration sources, taking priority over other files but not environment variables
    #[arg(short, long)]
    pub config: Option<String>,

    #[clap(subcommand)]
    pub action: ActionType,
}

#[derive(Debug, Subcommand)]
pub enum ActionType {
    /// Run the daemon and listen for requests
    Serve(ServeAction),
}

#[derive(Debug, Args)]
pub struct ServeAction {
    /// The log level to use for the server
    #[arg(short, long, default_value_t = Level::WARN)]
    pub log_level: Level,
}

#[derive(Error, Debug)]
pub enum ArgsError {
    #[error("the file extension of the provided config file is not one of .json or .toml")]
    InvalidConfigExtension(Option<String>),
}