#![feature(async_fn_in_trait)]

mod timestamp;
mod bayou;
mod config;
mod cryptoblob;
mod imap;
mod k2v_util;
mod lmtp;
mod login;
mod mail;
mod server;
mod storage;

use std::path::PathBuf;

use anyhow::Result;
use clap::{Parser, Subcommand};

use config::*;
use server::Server;

#[derive(Parser, Debug)]
#[clap(author, version, about, long_about = None)]
struct Args {
    #[clap(subcommand)]
    command: Command,

    #[clap(short, long, env = "CONFIG_FILE", default_value = "aerogramme.toml")]
    config_file: PathBuf,
}

#[derive(Subcommand, Debug)]
enum Command {
    #[clap(subcommand)]
    Companion(CompanionCommand),

    #[clap(subcommand)]
    Provider(ProviderCommand),
    //Test,
}

#[derive(Subcommand, Debug)]
enum CompanionCommand {
    /// Runs the IMAP proxy
    Daemon,
    Reload {
        #[clap(short, long, env = "AEROGRAMME_PID")]
        pid: Option<u64>,
    },
    Wizard,
    #[clap(subcommand)]
    Account(AccountManagement),
}

#[derive(Subcommand, Debug)]
enum ProviderCommand {
    /// Runs the IMAP+LMTP server daemon
    Daemon,
    Reload,
    #[clap(subcommand)]
    Account(AccountManagement),
}

#[derive(Subcommand, Debug)]
enum AccountManagement {
    Add {
        #[clap(short, long)]
        login: String,
        #[clap(short, long)]
        setup: PathBuf,
    },
    Delete {
        #[clap(short, long)]
        login: String,
    },
    ChangePassword {
        #[clap(short, long)]
        login: String
    },
}

#[tokio::main]
async fn main() -> Result<()> {
    if std::env::var("RUST_LOG").is_err() {
        std::env::set_var("RUST_LOG", "main=info,aerogramme=info,k2v_client=info")
    }

    // Abort on panic (same behavior as in Go)
    std::panic::set_hook(Box::new(|panic_info| {
        eprintln!("{}", panic_info);
        eprintln!("{:?}", backtrace::Backtrace::new());
        std::process::abort();
    }));

    tracing_subscriber::fmt::init();

    let args = Args::parse();
    let any_config = read_config(args.config_file)?;

    match (args.command, any_config) {
        (Command::Companion(subcommand), AnyConfig::Companion(config)) => match subcommand {
            CompanionCommand::Daemon => {
                let server = Server::from_companion_config(config).await?;
                server.run().await?;
            },
            CompanionCommand::Reload { pid } => {
                unimplemented!();
            },
            CompanionCommand::Wizard => {
                unimplemented!();
            },
            CompanionCommand::Account(cmd) => {
                let user_file = config.users.user_list;
                account_management(cmd, user_file);
            }
        },
        (Command::Provider(subcommand), AnyConfig::Provider(config)) => match subcommand {
            ProviderCommand::Daemon => {
                let server = Server::from_provider_config(config).await?;
                server.run().await?;
            },
            ProviderCommand::Reload => {
                unimplemented!();
            },
            ProviderCommand::Account(cmd) => {
                let user_file = match config.users {
                    UserManagement::Static(conf) => conf.user_list,
                    UserManagement::Ldap(_) => panic!("LDAP account management is not supported from Aerogramme.")
                };
                account_management(cmd, user_file);
            }
        },
        (Command::Provider(_), AnyConfig::Companion(_)) => {
            panic!("Your want to run a 'Provider' command but your configuration file has role 'Companion'.");
        },
        (Command::Companion(_), AnyConfig::Provider(_)) => {
            panic!("Your want to run a 'Companion' command but your configuration file has role 'Provider'.");
        },
    }

    Ok(())
}

fn account_management(cmd: AccountManagement, users: PathBuf) {
    match cmd {
        Add => {
            unimplemented!();
        },
        Delete => {
            unimplemented!();
        },
        ChangePassword => {
            unimplemented!();
        },
    }
}