use crate::helpers::{TestApp, when_sending_an_email};
use sqlx::PgPool;
use wiremock::ResponseTemplate;

#[sqlx::test]
async fn subscribe_displays_a_confirmation_message_for_valid_form_data(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    when_sending_an_email()
        .respond_with(ResponseTemplate::new(200))
        .mount(&app.email_server)
        .await;

    let email = "alphonse.paix@outlook.com";
    let body = format!("email={email}");
    let response = app.post_subscriptions(body).await;

    assert!(response.status().is_success());
    let html_fragment = response.text().await.unwrap();
    assert!(html_fragment.contains("You'll receive a confirmation email shortly"));
}

#[sqlx::test]
async fn subscribe_persists_the_new_subscriber(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    when_sending_an_email()
        .respond_with(ResponseTemplate::new(200))
        .mount(&app.email_server)
        .await;

    let email = "alphonse.paix@outlook.com";
    let body = format!("email={email}");
    let response = app.post_subscriptions(body).await;

    assert!(response.status().is_success());
    let html_fragment = response.text().await.unwrap();
    assert!(html_fragment.contains("You'll receive a confirmation email shortly"));

    let saved = sqlx::query!("SELECT email, status FROM subscriptions")
        .fetch_one(&app.connection_pool)
        .await
        .expect("Failed to fetch saved subscription");

    assert_eq!(saved.email, "alphonse.paix@outlook.com");
    assert_eq!(saved.status, "pending_confirmation");
}

#[sqlx::test]
async fn subscribe_returns_a_422_when_data_is_missing(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    let response = app.post_subscriptions(String::new()).await;

    assert_eq!(
        422,
        response.status().as_u16(),
        "the API did not fail with 422 Unprocessable Entity when the payload was missing the email"
    );
}

#[sqlx::test]
async fn subscribe_sends_a_confirmation_email_for_valid_data(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    let email = "alphonse.paix@outlook.com";
    let body = format!("email={email}");

    when_sending_an_email()
        .respond_with(ResponseTemplate::new(200))
        .expect(1)
        .mount(&app.email_server)
        .await;

    app.post_subscriptions(body).await;
}

#[sqlx::test]
async fn subscribe_sends_a_confirmation_email_with_a_link(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    let email = "alphonse.paix@outlook.com";
    let body = format!("email={email}");

    when_sending_an_email()
        .respond_with(ResponseTemplate::new(200))
        .expect(1)
        .mount(&app.email_server)
        .await;

    app.post_subscriptions(body).await;

    let email_request = &app.email_server.received_requests().await.unwrap()[0];
    let confirmation_links = app.get_confirmation_links(email_request);
    assert_eq!(confirmation_links.html, confirmation_links.text);
}

#[sqlx::test]
async fn subscribe_fails_if_there_is_a_fatal_database_error(connection_pool: PgPool) {
    let app = TestApp::spawn(connection_pool).await;

    let email = "alphonse.paix@outlook.com";
    let body = format!("name=Alphonse&email={}", email);

    sqlx::query!("ALTER TABLE subscriptions DROP COLUMN email")
        .execute(&app.connection_pool)
        .await
        .unwrap();

    let response = app.post_subscriptions(body).await;

    assert!(
        response
            .text()
            .await
            .unwrap()
            .contains("An internal server error occured")
    );
}