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use crate::DbImpl;
use crate::DbValue;
use crate::QueryError;
use crate::QueryMut;
use crate::QueryResult;
use crate::StorageData;

/// Query to create a new index on
/// a given key.
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "openapi", derive(utoipa::ToSchema))]
pub struct RemoveIndexQuery(pub DbValue);

impl QueryMut for RemoveIndexQuery {
    fn process<Store: StorageData>(
        &self,
        db: &mut DbImpl<Store>,
    ) -> Result<QueryResult, QueryError> {
        let value_count = db.remove_index(&self.0)?;

        Ok(QueryResult {
            result: -(value_count as i64),
            elements: vec![],
        })
    }
}