use std::error::Error;
use std::fs;
use clap::{Parser, Subcommand};
use ipnet::Ipv4Net;
use url::Url;
use crate::account::account_main;
use crate::network::network_main;
use crate::org::org_main;

pub mod account;
pub mod api;
pub mod network;
pub mod org;

#[derive(Parser, Debug)]
#[command(author, version, about, long_about = None)]
#[command(propagate_version = true)]
pub struct Args {
    #[command(subcommand)]
    command: Commands,
    #[clap(short, long, env = "TFCLI_SERVER")]
    /// The base URL of your trifid-api instance. Defaults to the value in $XDG_CONFIG_HOME/tfcli-server-url.conf or the TFCLI_SERVER environment variable.
    server: Option<Url>
}

#[derive(Subcommand, Debug)]
pub enum Commands {
    /// Manage your trifid account
    Account {
        #[command(subcommand)]
        command: AccountCommands
    },
    /// Manage the networks associated with your trifid account
    Network {
        #[command(subcommand)]
        command: NetworkCommands
    },
    /// Manage the organization associated with your trifid account
    Org {
        #[command(subcommand)]
        command: OrgCommands
    }
}

#[derive(Subcommand, Debug)]
pub enum AccountCommands {
    /// Create a new trifid account on the designated server
    Create {
        #[clap(short, long)]
        email: String
    },
    /// Log in to your account with a magic-link token acquired via email or the trifid-api logs.
    MagicLink {
        #[clap(short, long)]
        magic_link_token: String
    },
    /// Create a new TOTP authenticator on this account to enable authorizing with 2fa and performing all management tasks.
    MfaSetup {},
    /// Finish creating a new TOTP authenticator by inputting the code shown on your authenticator app.
    MfaSetupFinish {
        #[clap(short, long)]
        code: String,
        #[clap(short, long)]
        token: String
    },
    /// Create a new short-lived authentication token by inputting the code shown on your authenticator app.
    Mfa {
        #[clap(short, long)]
        code: String
    }
}

#[derive(Subcommand, Debug)]
pub enum NetworkCommands {
    /// List all networks associated with your trifid account.
    List {},
    /// Lookup a specific network by ID.
    Lookup {
        #[clap(short, long)]
        id: String
    }
}

#[derive(Subcommand, Debug)]
pub enum OrgCommands {
    /// Create an organization on your trifid-api server. NOTE: This command ONLY works on trifid-api servers. It will NOT work on original DN servers.
    Create {
        #[clap(short, long)]
        cidr: Ipv4Net
    }
}

#[tokio::main]
async fn main() {
    match main2().await {
        Ok(_) => (),
        Err(e) => {
            eprintln!("There was an error during execution: {}", e);
            std::process::exit(1);
        }
    }
}

async fn main2() -> Result<(), Box<dyn Error>> {
    let args = Args::parse();

    // find server
    let server;

    if let Some(srv) = args.server {
        server = srv; // Environment variable or CLI takes precedence over config file
    } else {
        let srv_url_file = dirs::config_dir().unwrap().join("tfcli-server-url.conf");
        if !srv_url_file.exists() {
            eprintln!("[error] no server URL available: '-s/--server' not provided, TFCLI_SERVER not set, and {} does not exist", srv_url_file.display());
            eprintln!("[error] please set a server url via any of these mechanisms and try again");
            std::process::exit(1);
        }
        let url_s = fs::read_to_string(&srv_url_file)?;
        let url = match Url::parse(&url_s) {
            Ok(u) => u,
            Err(e) => {
                eprintln!("[error] unable to parse the URL in {}", srv_url_file.display());
                eprintln!("[error] urlparse returned error '{}'", e);
                eprintln!("[error] please correct the error and try again");
                std::process::exit(1);
            }
        };
        server = url;
    }

    match args.command {
        Commands::Account { command } => account_main(command, server).await,
        Commands::Network { command } => network_main(command, server).await,
        Commands::Org { command } => org_main(command, server).await
    }
}