use std::net::SocketAddr;
use tokio::net::TcpListener;
use sqlx::{PgConnection, Connection};
use learn_axum::configuration::get_configuration;

struct TestApp {
    address: String,
}

#[tokio::test]
async fn health_check_works() {
    // Arrange
    let TestApp { address, .. } = spawn_app().await;

    // Act
    let client = reqwest::Client::new();
    let response = client
        .get(format!("{address}/health_check"))
        .send()
        .await
        .expect("Failed to execute request.");

    // Assert
    assert!(response.status().is_success());
    assert_eq!(Some(0), response.content_length());
}

#[tokio::test]
async fn subscribe_returns_a_200_for_valid_form_data() {
    // Arrange
    let TestApp { address } = spawn_app().await;
    let configuration = get_configuration().expect("Failed to read configuration");
    let connection_string = configuration.database.connection_string();
    // The `Connection` trait MUST be in scope for us to invoke
    // `PgConnection::connect` - it is not an inherent method of the struct!
    let connection = PgConnection::connect(&connection_string)
        .await
        .expect("Failed to connect to Postgres.");
    let client = reqwest::Client::new();

    // Act
    let body = "name=le%20guin&email=ursula_le_guin%40gmail.com";
    let response = client
        .post(&format!("{}/subscriptions", &address))
        .header("Content-Type", "application/x-www-form-urlencoded")
        .body(body)
        .send()
        .await
        .expect("Failed to execute request.");

    // Assert
    assert_eq!(200, response.status().as_u16());
}

// #[tokio::test]
// async fn subscribe_returns_a_400_when_data_is_missing() {
//     // Arrange
//     let TestApp { addr, .. } = spawn_app().await;
//     let client = reqwest::Client::new();
//     let test_cases = vec![
//         ("name=le%20guin", "missing the email"),
//         ("email=ursula_le_guin%40gmail.com", "missing the name"),
//         ("", "missing both name and email"),
//     ];
//
//     for (invalid_body, error_message) in test_cases {
//         // Act
//         let response = client
//             .post(&format!("http://{addr}/subscriptions"))
//             .header("Content-Type", "application/x-www-form-urlencoded")
//             .body(invalid_body)
//             .send()
//             .await
//             .expect("Failed to execute request.");
//
//         // Assert
//         assert_eq!(
//             400,
//             response.status().as_u16(),
//             "The API did not fail with 400 Bad Request when the payload was {}.",
//             error_message
//         );
//     }
// }

async fn spawn_app() -> TestApp {
    let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
    let address = format!("http://{}", listener.local_addr().unwrap());

    tokio::spawn(async move {
        axum::serve(listener, learn_axum::startup::app())
            .await
            .unwrap();
    });
    TestApp {
        address
    }
}