mod config;
mod db;
mod models;
mod routes;
mod storage;

use std::sync::Arc;

use axum::{
    routing::{delete, get, post, put},
    Router,
};
use sqlx::any::install_default_drivers;
use tower_http::trace::TraceLayer;
use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};

use crate::{config::AppConfig, db::Database, storage::S3Storage};

/// Shared application state injected into every handler.
#[derive(Clone)]
pub struct AppState {
    pub db: Database,
    pub storage: S3Storage,
}

#[tokio::main]
async fn main() {
    // Initialise structured logging.
    tracing_subscriber::registry()
        .with(
            tracing_subscriber::EnvFilter::try_from_default_env()
                .unwrap_or_else(|_| "mikebase=debug,tower_http=debug".into()),
        )
        .with(tracing_subscriber::fmt::layer())
        .init();

    // Load configuration from config.toml / environment variables.
    let cfg = AppConfig::load().expect("Failed to load configuration");
    let cfg = Arc::new(cfg);

    // Install SQLite and PostgreSQL drivers for sqlx AnyPool.
    install_default_drivers();

    // Connect to the database and run migrations.
    let db = Database::connect(cfg.clone())
        .await
        .expect("Failed to connect to database");
    db.migrate().await.expect("Failed to run migrations");

    // Build S3 storage client.
    let storage = S3Storage::new(&cfg);

    let state = AppState { db, storage };

    let app = Router::new()
        .route("/", get(routes::emotes::root))
        .route("/health", get(routes::health::health))
        .route("/version", get(routes::version::version))
        .route("/json", get(routes::emotes::list_emotes))
        .route("/emotes", post(routes::emotes::create_emote))
        .route("/emotes/{uuid}", put(routes::emotes::update_emote))
        .route("/emotes/{uuid}", delete(routes::emotes::delete_emote))
        .layer(TraceLayer::new_for_http())
        .with_state(state);

    let addr = format!("{}:{}", cfg.server.host, cfg.server.port);
    tracing::info!("Listening on {addr}");
    let listener = tokio::net::TcpListener::bind(&addr)
        .await
        .expect("Failed to bind address");
    axum::serve(listener, app)
        .await
        .expect("Server error");
}