use crate::{
    database::Database,
    models::typ::{Typ, TypInput},
    schema::typen,
};
use diesel::prelude::*;
use juniper::{graphql_object, FieldResult};

#[derive(Clone, Copy, Debug)]
pub struct Mutation;

#[graphql_object(context = Database)]
impl Mutation {
    fn new_typ(#[graphql(context)] database: &Database, typ_input: TypInput) -> FieldResult<Typ> {
        let connection = &mut database.pool.get()?;

        let typ = diesel::insert_into(typen::table)
            .values(&typ_input)
            .get_result::<Typ>(connection)?;

        Ok(typ)
    }

    fn edit_typ(
        #[graphql(context)] database: &Database,
        typ_id: i32,
        typ_name: String,
    ) -> FieldResult<Typ> {
        use crate::schema::typen::dsl::*;
        let connection = &mut database.pool.get()?;

        let update_typ = diesel::update(typen.find(typ_id))
            .set(name.eq(typ_name))
            .get_result::<Typ>(connection)?;

        Ok(update_typ)
    }

    fn delete_typ(#[graphql(context)] database: &Database, typ_id: i32) -> FieldResult<String> {
        use crate::schema::typen::dsl::*;
        let conn = &mut database.pool.get()?;

        diesel::delete(typen.find(typ_id)).execute(conn)?;

        Ok("Typ wurde erfolgreich gelöscht".to_string())
    }
}