// src/uctovnictvo/handlers/get_uctovnictvo_by_position.rs
use tonic::Status;
use sqlx::PgPool;
use common::proto::multieko2::common::PositionRequest;
use super::get_uctovnictvo;

pub async fn get_uctovnictvo_by_position(
    db_pool: &PgPool,
    request: PositionRequest,
) -> Result<common::proto::multieko2::uctovnictvo::UctovnictvoResponse, Status> {
    if request.position < 1 {
        return Err(Status::invalid_argument("Position must be at least 1"));
    }

    // Find the ID of the Nth non-deleted record
    let id: i64 = sqlx::query_scalar!(
        r#"
        SELECT id
        FROM uctovnictvo
        WHERE deleted = FALSE
        ORDER BY id ASC
        OFFSET $1
        LIMIT 1
        "#,
        request.position - 1
    )
    .fetch_optional(db_pool)
    .await
    .map_err(|e| Status::internal(e.to_string()))?
    .ok_or_else(|| Status::not_found("Position out of bounds"))?;

    // Now fetch the complete record using the existing get_uctovnictvo function
    get_uctovnictvo(db_pool, common::proto::multieko2::uctovnictvo::GetUctovnictvoRequest { id }).await
}