use actix_web::{get, web, App, HttpResponse, HttpServer, Responder};
use serde_json::json;
use sqlx::PgPool;
use std::env;

pub mod auth;
mod models;
mod routes;

pub struct Config {
    pub jwt_secret: String,
    pub is_production: bool,
}

#[get("/")]
async fn index() -> impl Responder {
    "Welcome to the Torus API"
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    dotenvy::dotenv().ok();

    let app_env = env::var("APP_ENV").unwrap_or_else(|_| "development".to_string());
    let port: u16 = env::var("PORT")
        .unwrap_or_else(|_| "8080".to_string())
        .parse()
        .expect("PORT must be a valid number");

    let host = if app_env == "production" {
        "example.com".to_string()
    } else {
        "127.0.0.1".to_string()
    };

    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
    let pool = PgPool::connect(&database_url)
        .await
        .expect("Failed to connect to Postgres");

    let config = web::Data::new(Config {
        jwt_secret: env::var("JWT_SECRET").expect("JWT_SECRET must be set"),
        is_production: app_env == "production",
    });

    println!("Starting server on {}:{} ({})", host, port, app_env);

    HttpServer::new(move || {
        let json_cfg = web::JsonConfig::default().error_handler(|_err, _req| {
            let response = HttpResponse::BadRequest()
                .json(json!({"error": "Invalid request body. Please check your data and try again."}));
            actix_web::error::InternalError::from_response(_err, response).into()
        });

        App::new()
            .app_data(web::Data::new(pool.clone()))
            .app_data(config.clone())
            .app_data(json_cfg)
            .service(index)
            .service(routes::users::create::create_user)
            .service(routes::users::login::login)
            .service(routes::users::logout::logout)
            .service(routes::users::get::get_user)
            .service(routes::workouts::create::create_workout)
            .service(routes::workouts::delete::delete_workout)
            .service(routes::workouts::get::get_workout)
            .service(routes::workouts::list::list_workouts)
            .service(routes::workouts::update::update_workout)
    })
    .bind((host.as_str(), port))?
    .run()
    .await
}