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use std::env;

mod database;
mod routes;
mod utils;

use axum::{
    routing::{get, post},
    Router,
};

use routes::problem::{get_problems, create_problem};
use routes::user::{create_user, me};
use routes::auth::{login, logout};
use tower_http::services::ServeDir;

use crate::{database::Database, utils::register_admin};

#[derive(Clone)]
struct AppState {
    secret: String,
    database: Database,
}

#[tokio::main]
async fn main() {

    let database = Database::new_in_memory().unwrap();
    database.initialize().unwrap();

    // TODO: generically load environment variables, this is tedious
    let Ok(secret) = env::var("JWT_SECRET") else {
        eprintln!("missing environment variable JWT_SECRET");
        return;
    };
    let Ok(admin_email) = env::var("ADMIN_EMAIL") else {
        eprintln!("missing environment variable ADMIN_EMAIL");
        return;
    };
    let Ok(admin_username) = env::var("ADMIN_USERNAME") else {
        eprintln!("missing environment variable ADMIN_USERNAME");
        return;
    };
    let Ok(admin_password) = env::var("ADMIN_PASSWORD") else {
        eprintln!("missing environment variable ADMIN_PASSWORD");
        return;
    };
    
    let Ok(()) = register_admin(&database, &admin_email, &admin_username, &admin_password) else {
        eprintln!("failed to register admin user");
        return;
    };
    
    let state = AppState {
        secret: secret,
        database: database,
    };

    let static_files = ServeDir::new("./static");
    
    let app = Router::new()
        .route("/login", post(login))
        .route("/logout", post(logout))
        .route("/problem", get(get_problems))
        .route("/problem", post(create_problem))
        .route("/user", post(create_user))
        .route("/me", get(me))
        .nest_service("/static", static_files)
        .with_state(state);
    
    let listener = tokio::net::TcpListener::bind("0.0.0.0:3000").await.unwrap();
    axum::serve(listener, app).await.unwrap();
}

#[cfg(test)]
mod tests {
    fn test_app() -> String {
        "hello".into()
    }
}