use diesel::prelude::*;
use juniper::{graphql_object, FieldResult, IntoFieldError};
use uuidv7::Uuid;

use crate::{
    api::{models, scalars, Context, Error, QueryResultIntoFieldResult},
    db,
};

#[derive(Clone, Debug)]
pub struct User {
    pub id: Uuid,
    pub name: String,
}

#[graphql_object(context = Context)]
impl User {
    fn id(&self) -> scalars::Uuid {
        scalars::Uuid(self.id)
    }

    fn name(&self) -> &str {
        &self.name
    }

    async fn repositories(
        &self,
        context: &Context,
    ) -> FieldResult<Vec<models::repository::Repository>> {
        let db_conn = &mut context.get_db_conn()?;
        let ids = db::schema::repositories::table
            .select(db::schema::repositories::id)
            .filter(db::schema::repositories::user_id.eq(self.id))
            .load::<Uuid>(db_conn)
            .into_field_result()?;

        context
            .loaders
            .repository
            .try_load_many(ids)
            .await
            .map_or_else(
                |_| Err(Error::Internal.into_field_error()),
                |x| Ok(x.into_values().collect()),
            )
    }
}