use actix_web::{http::header::LOCATION, web, HttpResponse, Responder};
use garde::Validate;
use sqlx::PgPool;

use crate::{
    endpoints::{user::NewOrEditUserForm, IdPath},
    models::{Area, Function, Role, User, UserChangeset},
    utils::ApplicationError,
};

#[actix_web::post("/users/edit/{id}")]
pub async fn post_edit(
    user: web::ReqData<User>,
    pool: web::Data<PgPool>,
    path: web::Path<IdPath>,
    form: web::Form<NewOrEditUserForm>,
) -> Result<impl Responder, ApplicationError> {
    if user.role != Role::AreaManager && user.role != Role::Admin {
        return Err(ApplicationError::Unauthorized);
    }

    if user.id == path.id {
        return Ok(HttpResponse::BadRequest().finish());
    }

    let Some(user_in_db) = User::read_by_id(pool.get_ref(), path.id).await? else {
        return Ok(HttpResponse::NotFound().finish());
    };

    if user.role == Role::AreaManager && user.area_id != user_in_db.area_id {
        return Err(ApplicationError::Unauthorized);
    }

    let area_id = form.area.unwrap_or(user_in_db.area_id);
    if Area::read_by_id(pool.get_ref(), area_id).await?.is_none() {
        return Err(ApplicationError::Unauthorized);
    }

    let mut functions = Vec::with_capacity(3);

    if form.is_posten.unwrap_or(false) {
        functions.push(Function::Posten);
    }

    if form.is_wachhabender.unwrap_or(false) {
        functions.push(Function::Wachhabender);
    }

    if form.is_fuehrungsassistent.unwrap_or(false) {
        functions.push(Function::Fuehrungsassistent);
    }

    let changeset = UserChangeset {
        name: form.name.clone(),
        email: form.email.clone(),
        role: form.role.try_into()?,
        functions,
        area_id,
    };

    if let Err(e) = changeset.validate() {
        return Ok(HttpResponse::BadRequest().body(e.to_string()));
    };

    User::update(pool.get_ref(), user_in_db.id, changeset).await?;

    Ok(HttpResponse::Found()
        .insert_header((LOCATION, "/users"))
        .insert_header(("HX-LOCATION", "/users"))
        .finish())
}

#[cfg(test)]
mod tests {
    use crate::{endpoints::user::NewOrEditUserForm, models::*, utils::test_helper::*};
    use brass_macros::db_test;
    use fake::{
        faker::{internet::en::SafeEmail, name::en::Name},
        Fake, Faker,
    };

    #[db_test]
    async fn works_when_user_is_admin(context: &DbTestContext) {
        User::create(&context.db_pool, Faker.fake()).await.unwrap();

        Area::create(&context.db_pool, "Süd").await.unwrap();

        let app = context.app().await;
        let config = RequestConfig {
            uri: "/users/edit/1".to_string(),
            role: Role::Admin,
            function: vec![Function::Posten],
            user_area: 1,
        };

        let new_name: String = Name().fake();
        let new_mail: String = SafeEmail().fake();

        let form = NewOrEditUserForm {
            name: new_name.clone(),
            email: new_mail.clone(),
            role: Role::AreaManager as u8,
            is_posten: None,
            is_wachhabender: None,
            is_fuehrungsassistent: Some(true),
            area: Some(2),
        };

        let response = test_post(&context.db_pool, app, &config, form).await;
        assert_eq!(StatusCode::FOUND, response.status());

        let updated_user = User::read_by_id(&context.db_pool, 1)
            .await
            .unwrap()
            .unwrap();

        assert_eq!(new_name, updated_user.name);
        assert_eq!(new_mail, updated_user.email);
        assert_eq!(Role::AreaManager, updated_user.role);
        assert!(updated_user.function.is_fuehrungsassistent());
        assert_eq!(2, updated_user.area_id);
    }

    #[db_test]
    async fn cant_edit_oneself(context: &DbTestContext) {
        let app = context.app().await;
        let config = RequestConfig {
            uri: "/users/edit/1".to_string(),
            role: Role::Admin,
            function: vec![Function::Posten],
            user_area: 1,
        };

        let form = NewOrEditUserForm {
            name: "".to_string(),
            email: "".to_string(),
            role: Role::AreaManager as u8,
            is_posten: None,
            is_wachhabender: None,
            is_fuehrungsassistent: Some(true),
            area: Some(1),
        };

        let response = test_post(&context.db_pool, app, &config, form).await;
        assert_eq!(StatusCode::BAD_REQUEST, response.status());
    }
}