use std::error::Error;
use std::time::Duration;
use actix_request_identifier::RequestIdentifier;
use actix_web::{App, HttpResponse, HttpServer};
use actix_web::http::header::HeaderValue;
use actix_web::web::{Data, JsonConfig};
use log::{info, Level};
use sea_orm::{ConnectOptions, Database, DatabaseConnection};
use tera::Tera;
use starkingdoms_api_migration::{Migrator, MigratorTrait};
use crate::config::CONFIG;
use crate::error::{APIError, APIErrorsResponse};

pub mod config;
pub mod routes;
pub mod error;

pub struct AppState {
    pub conn: DatabaseConnection,
    pub templates: Tera
}

#[actix_web::main]
async fn main() -> Result<(), Box<dyn Error>> {
    simple_logger::init_with_level(Level::Debug).unwrap();

    info!("Connecting to database at {}...", CONFIG.database.url);

    let mut opt = ConnectOptions::new(CONFIG.database.url.clone());
    opt.max_connections(CONFIG.database.max_connections)
        .min_connections(CONFIG.database.min_connections)
        .connect_timeout(Duration::from_secs(CONFIG.database.connect_timeout))
        .acquire_timeout(Duration::from_secs(CONFIG.database.acquire_timeout))
        .idle_timeout(Duration::from_secs(CONFIG.database.idle_timeout))
        .max_lifetime(Duration::from_secs(CONFIG.database.max_lifetime))
        .sqlx_logging(CONFIG.database.sqlx_logging)
        .sqlx_logging_level(log::LevelFilter::Info);

    let db = Database::connect(opt).await?;

    info!("Performing database migration...");
    Migrator::up(&db, None).await?;

    info!("Loading templates...");
    let tera = Tera::new("templates/**/*.tera")?;

    let data = Data::new(AppState {
        conn: db,
        templates: tera
    });

    HttpServer::new(move || {
        App::new()
            .app_data(data.clone())
            .app_data(JsonConfig::default().error_handler(|err, _req| {
                let api_error: APIError = (&err).into();
                actix_web::error::InternalError::from_response(
                    err,
                    HttpResponse::BadRequest().json(APIErrorsResponse {
                        errors: vec![
                            api_error
                        ],
                    })
                ).into()
            }))
            .wrap(RequestIdentifier::with_generator(|| HeaderValue::from_str(&ulid::Ulid::new().to_string()).unwrap()))
            .service(routes::select_realm::select_realm)
            .service(actix_files::Files::new("/static", "static"))
    }).bind(CONFIG.server.bind)?.run().await?;

    Ok(())
}