use actix_web::{web, HttpResponse, Responder};
use askama::Template;
use sqlx::PgPool;

use crate::{
    endpoints::IdPath,
    filters,
    models::{Role, User},
    utils::ApplicationError,
};

#[derive(Template, Debug)]
#[template(path = "user/overview_locked_td.html")]
struct OverviewPartialLockedTemplate {
    u: User,
    is_oob: bool,
}

#[derive(Template, Debug)]
#[template(path = "user/overview_buttons_td.html")]
struct OverviewPartialButtonsTemplate {
    u: User,
}

#[actix_web::put("/users/{id}/lock")]
pub async fn put_lock_user(
    user: web::ReqData<User>,
    pool: web::Data<PgPool>,
    path: web::Path<IdPath>,
) -> Result<impl Responder, ApplicationError> {
    handle_lock_state_for_user(user, pool, path, true).await
}

#[actix_web::put("/users/{id}/unlock")]
pub async fn put_unlock_user(
    user: web::ReqData<User>,
    pool: web::Data<PgPool>,
    path: web::Path<IdPath>,
) -> Result<impl Responder, ApplicationError> {
    handle_lock_state_for_user(user, pool, path, false).await
}

async fn handle_lock_state_for_user(
    user: web::ReqData<User>,
    pool: web::Data<PgPool>,
    path: web::Path<IdPath>,
    lock_state: bool,
) -> 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(mut 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 || user_in_db.role == Role::Admin)
    {
        return Err(ApplicationError::Unauthorized);
    }

    if user_in_db.locked != lock_state {
        User::update_locked(pool.get_ref(), user_in_db.id, lock_state).await?;
        user_in_db.locked = lock_state;
    }

    let buttons = OverviewPartialButtonsTemplate {
        u: user_in_db.clone(),
    };

    let locked_oob = OverviewPartialLockedTemplate {
        u: user_in_db,
        is_oob: true,
    };

    let mut body = buttons.render()?;
    body.push_str(&locked_oob.render()?);

    Ok(HttpResponse::Ok().body(body))
}

#[cfg(test)]
mod tests {
    use crate::{
        models::{Area, Function, Role, User},
        utils::test_helper::{
            assert_snapshot, read_body, test_put, DbTestContext, RequestConfig, StatusCode,
        },
    };
    use brass_macros::db_test;
    use fake::{Fake, Faker};

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

        let lock_config = RequestConfig {
            uri: "/users/1/lock".to_string(),
            role: Role::Admin,
            function: vec![Function::Posten],
            user_area: 1,
        };
        let lock_response =
            test_put::<_, _, String>(&context.db_pool, &app, &lock_config, None).await;

        assert_eq!(StatusCode::OK, lock_response.status());

        let lock_body = read_body(lock_response).await;
        assert_snapshot!(lock_body);

        let unlock_config = RequestConfig {
            uri: "/users/1/unlock".to_string(),
            role: Role::Admin,
            function: vec![Function::Posten],
            user_area: 1,
        };
        let unlock_response =
            test_put::<_, _, String>(&context.db_pool, &app, &unlock_config, None).await;

        assert_eq!(StatusCode::OK, unlock_response.status());

        let unlock_body = read_body(unlock_response).await;
        assert_snapshot!(unlock_body);
    }

    #[db_test]
    async fn area_manager_cant_lock_outside_of_his_area(context: &DbTestContext) {
        let app = context.app().await;
        Area::create(&context.db_pool, "Bereich 2").await.unwrap();
        User::create(&context.db_pool, Faker.fake()).await.unwrap();

        let config = RequestConfig {
            uri: "/users/1/lock".to_string(),
            role: Role::AreaManager,
            function: vec![Function::Posten],
            user_area: 2,
        };

        let response = test_put::<_, _, String>(&context.db_pool, &app, &config, None).await;

        assert_eq!(StatusCode::UNAUTHORIZED, response.status())
    }

    #[db_test]
    async fn one_cant_lock_oneself(context: &DbTestContext) {
        let app = context.app().await;

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

        let response = test_put::<_, _, String>(&context.db_pool, &app, &config, None).await;

        assert_eq!(StatusCode::BAD_REQUEST, response.status())
    }

    #[db_test]
    async fn one_cant_lock_non_existing_user(context: &DbTestContext) {
        let app = context.app().await;

        let config = RequestConfig {
            uri: "/users/30/lock".to_string(),
            role: Role::Admin,
            function: vec![Function::Posten],
            user_area: 1,
        };

        let response = test_put::<_, _, String>(&context.db_pool, &app, &config, None).await;

        assert_eq!(StatusCode::NOT_FOUND, response.status())
    }
}