mod auth;

use actix_cors::Cors;
use actix_files::Files;
use actix_web::{
    get, http::header, web, App, HttpResponse, HttpServer, Responder,
};
use dotenv::dotenv;
use env_logger::{Builder, Env};
use sqlx::postgres::PgPoolOptions;
use rust_decimal::Decimal;
use bigdecimal::BigDecimal;
use serde_json::json;
use std::collections::HashMap;
use std::convert::From;

#[derive(sqlx::FromRow, serde::Serialize)]
struct Book {
    id: i32,
    tytul: String,
    autor: String,
    cena: BigDecimal,
    obraz_url: Option<String>,
    opis: Option<String>,
}

#[get("/api/ksiazki")]
async fn get_ksiazki(
    pool: web::Data<sqlx::PgPool>,
    web::Query(params): web::Query<HashMap<String, String>>,
) -> impl Responder {
    let search_term = params.get("search").map(|s| s.as_str()).unwrap_or("");
    let sort_by = params.get("sort").map(|s| s.as_str()).unwrap_or("default");
    
    let base_query = "SELECT 
        id,
        tytul,
        autor,
        cena,
        COALESCE('/images/' || obraz_url, '/images/placeholder.jpg') as obraz_url,
        COALESCE(opis, 'Brak opisu') as opis 
    FROM ksiazki";

    let sort_clause = match sort_by {
        "price_asc" => " ORDER BY cena ASC",
        "price_desc" => " ORDER BY cena DESC",
        "title_asc" => " ORDER BY tytul ASC",
        "author_asc" => " ORDER BY autor ASC",
        _ => ""
    };

    let query = if !search_term.is_empty() {
        format!(
            "{} WHERE LOWER(tytul) LIKE LOWER($1) OR LOWER(autor) LIKE LOWER($1){}",
            base_query, sort_clause
        )
    } else {
        format!("{}{}", base_query, sort_clause)
    };

    let mut query_builder = sqlx::query_as::<_, Book>(&query);
    
    if !search_term.is_empty() {
        query_builder = query_builder.bind(format!("%{}%", search_term));
    }

    match query_builder.fetch_all(pool.get_ref()).await {
        Ok(books) => HttpResponse::Ok().json(books),
        Err(e) => {
            log::error!("Błąd bazy danych: {:?}", e);
            HttpResponse::InternalServerError().json(json!({"error": "Błąd serwera"}))
        }
    }
}

//#[get("/api/ksiazki")]
//async fn get_ksiazki(pool: web::Data<sqlx::PgPool>) -> impl Responder {
//    match sqlx::query_as!(
//        Book,
//        r#"SELECT id, tytul, autor, cena, obraz_url FROM ksiazki"#
//    )
//    .fetch_all(pool.get_ref())
//    .await
//    {
//        Ok(books) => HttpResponse::Ok().json(books),
//        Err(e) => {
//            log::error!("Błąd bazy danych: {:?}", e);
//            HttpResponse::InternalServerError().body(format!("Błąd: {}", e))
//        }
//    }
//}

#[get("/api/ksiazki/{id}")]
async fn get_ksiazka(
    pool: web::Data<sqlx::PgPool>,
    path: web::Path<i32>,
) -> impl Responder {
    let id = path.into_inner();
    
    match sqlx::query_as!(
        Book,
        r#"
        SELECT 
            id,
            tytul,
            autor,
            cena,
            COALESCE('/images/' || obraz_url, '/images/placeholder.jpg') as obraz_url,
            COALESCE(opis, 'Brak opisu') as opis
        FROM ksiazki 
        WHERE id = $1
        "#,
        id
    )
    .fetch_optional(pool.get_ref())
    .await
    {
        Ok(Some(book)) => HttpResponse::Ok().json(book),
        Ok(None) => HttpResponse::NotFound().json(json!({"error": "Książka nie znaleziona"})),
        Err(e) => {
            log::error!("Błąd bazy danych: {}", e);
            HttpResponse::InternalServerError().json(json!({"error": "Błąd serwera"}))
        }
    }
}

#[get("/api/check-auth")]
async fn check_auth() -> impl Responder {
    HttpResponse::Ok().json(json!({
        "authenticated": false,
        "user": null
    }))
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    // Inicjalizacja loggera
    Builder::from_env(Env::default().default_filter_or("debug")).init();

    // Ładowanie zmiennych środowiskowych
    dotenv().ok();
    let database_url = std::env::var("DATABASE_URL")
        .expect("DATABASE_URL must be set in .env");

    // Utwórz pulę połączeń
    let pool = PgPoolOptions::new()
        .max_connections(5)
        .connect(&database_url)
        .await
        .expect("Failed to create pool");

    HttpServer::new(move || {
        let cors = Cors::default()
            .allow_any_origin()
            .allowed_methods(vec!["GET", "POST"])
            .allowed_headers(vec![
                header::CONTENT_TYPE,
                header::AUTHORIZATION,
                header::ACCEPT,
                header::HeaderName::from_static("content-type"),
            ]);

        App::new()
            .app_data(web::Data::new(pool.clone()))  // Dodaj pulę jako globalny stan
            .wrap(cors)
            .wrap(actix_web::middleware::Logger::default())
            .service(get_ksiazki)
            .service(get_ksiazka)
            .service(auth::rejestracja)
            .service(auth::login)
            .service(
                Files::new("/images", "./static/images") // Nowy endpoint dla obrazków
                    .show_files_listing(),
            )
            .service(Files::new("/", "./static").index_file("index.html"))
    })
    .bind("0.0.0.0:7999")?
    .run()
    .await
}