use clap::Subcommand;
use axum::{extract::Request, response::IntoResponse, Extension};

#[derive(Subcommand)]
pub enum WebdavCommand {
    Start {
        #[arg(short, long, default_value = "8002")]
        port: u16,
        #[arg(short, long)]
        user: String,
    },
}

pub async fn handle_webdav_command(cmd: WebdavCommand) -> anyhow::Result<()> {
    match cmd {
        WebdavCommand::Start { port, user } => {
            let db_path = std::path::PathBuf::from(crate::FileTree::user_db_path(&user));

            if !db_path.exists() {
                return Err(anyhow::anyhow!(
                    "User database not found: {}",
                    db_path.display()
                ));
            }

            println!("=== MarkBase WebDAV Server ===");
            println!("User: {}", user);
            println!("Port: {}", port);
            println!("Database: {}", db_path.display());
            println!("");

            run_webdav_server(port, user, db_path).await?;
        }
    }
    Ok(())
}

async fn run_webdav_server(
    port: u16,
    user: String,
    db_path: std::path::PathBuf,
) -> anyhow::Result<()> {
    use axum::{extract::Request, response::IntoResponse, routing::any, Extension, Router};
    use tokio::net::TcpListener;

    let webdav = markbase_webdav::webdav::MarkBaseWebDAV::new(user, db_path);
    let dav_handler = webdav.create_handler();

    let app = Router::new()
        .route("/webdav", any(handle_dav))
        .route("/webdav/", any(handle_dav))
        .route("/webdav/*path", any(handle_dav))
        .layer(Extension(dav_handler));

    let addr = format!("127.0.0.1:{}", port);
    let listener = TcpListener::bind(&addr).await?;

    println!("WebDAV server listening on http://{}", addr);
    println!("Mount point: /webdav");
    println!("");
    println!("Press Ctrl+C to stop");

    axum::serve(listener, app).await?;

    Ok(())
}

async fn handle_dav(
    Extension(dav): Extension<dav_server::DavHandler>,
    req: Request,
) -> impl IntoResponse {
    dav.handle(req).await
}