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mod api;
mod entity;
mod service;

use std::env;
use actix_files::Files;
use actix_web::{web, App, HttpServer, middleware};
use listenfd::ListenFd;
use sea_orm::{Database, DatabaseConnection};
use migration::{Migrator, MigratorTrait};

#[derive(Debug, Clone)]
struct AppState {
    conn: DatabaseConnection,
}

#[actix_web::main]
async fn main() -> std::io::Result<()> {
    std::env::set_var("RUST_LOG", "debug");
    tracing_subscriber::fmt::init();

    // get env vars
    dotenvy::dotenv().ok();
    let db_url = env::var("DATABASE_URL").expect("DATABASE_URL is not set in .env file");
    let host = env::var("HOST").expect("HOST is not set in .env file");
    let port = env::var("PORT").expect("PORT is not set in .env file");
    let server_url = format!("{host}:{port}");

    // establish connection to database and apply migrations
    // -> create post table if not exists
    let conn = Database::connect(&db_url).await.unwrap();
    Migrator::up(&conn, None).await.unwrap();

    let state = AppState { conn };

    // create server and try to serve over socket if possible
    let mut listenfd = ListenFd::from_env();
    let mut server = HttpServer::new(move || {
        App::new()
            .service(Files::new("/static", "./static"))
            .app_data(web::Data::new(state.clone()))
            .wrap(middleware::Logger::default())
            .configure(init)
    });

    server = match listenfd.take_tcp_listener(0)? {
        Some(listener) => server.listen(listener)?,
        None => server.bind(&server_url)?,
    };

    println!("Starting server at {server_url}");
    server.run().await?;

    Ok(())
}

fn init(cfg: &mut web::ServiceConfig) {
    cfg.service(api::tag::create);
    cfg.service(api::tag::delete);
    cfg.service(api::tag::list);
}