use axum::extract::State;
use axum::routing::post;
use axum::Form;
use axum::Router;
use chrono::Utc;
use serde::Deserialize;
use sqlx::PgPool;
use uuid::Uuid;

#[derive(Debug, Deserialize)]
struct FormData {
    email: String,
    name: String,
}

#[tracing::instrument(
    name = "Adding a new subscriber",
    skip(form, pool),
    fields(
        request_id = %Uuid::new_v4(),
        subscriber_email = %form.email,
        subscriber_name = %form.name
    )
)]
pub async fn subscribe(State(pool): State<PgPool>, Form(form): Form<FormData>) {
    match insert_subscriber(&pool, &form).await {
        Ok(_) => {
            tracing::info!("Subscriber added to the database");
        }
        Err(_) => {
            tracing::error!("Failed to add subscriber to the database");
        }
    }
}

#[tracing::instrument(
    name = "Saving new subscriber details in the database",
    skip(form, pool)
)]
pub async fn insert_subscriber(pool: &PgPool, form: &FormData) -> Result<(), sqlx::Error> {
    sqlx::query!(
        r#"
            INSERT INTO subscriptions (id, email, name, subscribed_at)
            VALUES ($1, $2, $3, $4)
            "#,
        Uuid::new_v4(),
        form.email,
        form.name,
        Utc::now()
    )
    // We use `get_ref` to get an immutable reference to the `PgConnection`
    // wrapped by `web::Data`.
    .execute(pool)
    .await
    .map_err(|e| {
        tracing::error!("Failed to execute query: {:?}", e);
        e
    })?;
    Ok(())
}

pub fn routes_subscriptions(pool: PgPool) -> Router {
    Router::new()
        .route("/subscriptions", post(subscribe))
        .with_state(pool)
}