//! Biomarker category API handlers.

use axum::{extract::State, http::StatusCode, Json};
use sea_orm::{DatabaseConnection, EntityTrait};
use serde::Serialize;

use crate::models::bio::biomarker_category;

/// Response for a biomarker category.
#[derive(Serialize)]
pub struct CategoryResponse {
    pub id: i32,
    pub name: String,
    pub description: Option<String>,
}

/// GET /api/categories - List all biomarker categories.
pub async fn list_categories(
    State(db): State<DatabaseConnection>,
) -> Result<Json<Vec<CategoryResponse>>, StatusCode> {
    let categories = biomarker_category::Entity::find()
        .all(&db)
        .await
        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;

    let items: Vec<CategoryResponse> = categories
        .into_iter()
        .map(|c| CategoryResponse {
            id: c.id,
            name: c.name,
            description: c.description,
        })
        .collect();

    Ok(Json(items))
}