use actix_web::{web, HttpResponse, Responder};
use chrono::{Days, NaiveTime};
use sqlx::PgPool;

use crate::{
    endpoints::{availability::NewOrEditAvailabilityTemplate, NaiveDateQuery},
    utils::{ApplicationError, TemplateResponse},
};
use brass_db::models::{find_free_date_time_slots, Availability, User};

#[actix_web::get("/availability/new")]
pub async fn get(
    user: web::ReqData<User>,
    pool: web::Data<PgPool>,
    query: web::Query<NaiveDateQuery>,
) -> Result<impl Responder, ApplicationError> {
    let availabilities_from_user =
        Availability::read_all_by_user_and_date(pool.get_ref(), user.id, &query.date).await?;
    let slot_suggestions = find_free_date_time_slots(&availabilities_from_user);

    let user_can_create_availability =
        availabilities_from_user.is_empty() || !slot_suggestions.is_empty();

    if !user_can_create_availability {
        return Ok(HttpResponse::BadRequest().finish());
    }

    let template = NewOrEditAvailabilityTemplate {
        user: user.into_inner(),
        date: query.date,
        enddate: None,
        id: None,
        start: Some(NaiveTime::from_hms_opt(10, 0, 0).unwrap()),
        end: Some(NaiveTime::from_hms_opt(20, 0, 0).unwrap()),
        comment: None,
        slot_suggestions,
        datetomorrow: query.date.checked_add_days(Days::new(1)).unwrap(),
        other_user: None,
        other_users: Vec::default(),
    };

    Ok(template.to_response()?)
}

#[cfg(test)]
mod tests {
    use crate::utils::test_helper::{
        assert_snapshot, create_test_login_user, test_get, DbTestContext, RequestConfig,
        ServiceResponseExt, StatusCode,
    };
    use brass_db::models::{Availability, AvailabilityChangeset};
    use brass_macros::db_test;
    use chrono::NaiveDate;

    #[db_test]
    async fn produces_template_when_user_is_admin(context: &DbTestContext) {
        let config = RequestConfig::new("/availability/new?date=2025-01-01");

        create_test_login_user(&context.db_pool, &config).await;

        let date = NaiveDate::from_ymd_opt(2025, 01, 01).unwrap();
        let changeset = AvailabilityChangeset::create_for_test(&date, 10, 20);
        Availability::create(&context.db_pool, 1, &changeset)
            .await
            .unwrap();

        let response = test_get(context.app().await, &config).await;
        let (status, body) = response.into_status_and_body().await;

        assert_eq!(StatusCode::OK, status);
        assert_snapshot!(body);
    }
}