//! Wishlist API: toggle items in the user's wishlist.

use axum::extract::{Path, State};
use axum::response::IntoResponse;
use axum::Json;

use crate::{
    auth::AuthUser,
    db::{self, ItemId},
    error::{AppError, Result},
    AppState,
};

/// Toggle an item's wishlist status. Returns the new state.
#[tracing::instrument(skip_all, name = "wishlists::toggle")]
pub(super) async fn toggle_wishlist(
    State(state): State<AppState>,
    AuthUser(user): AuthUser,
    Path(item_id): Path<ItemId>,
) -> Result<impl IntoResponse> {
    // Verify item exists and is public
    let item = db::items::get_item_by_id(&state.db, item_id)
        .await?
        .ok_or(AppError::NotFound)?;
    if !item.is_public {
        return Err(AppError::NotFound);
    }

    let currently_wishlisted = db::wishlists::is_wishlisted(&state.db, user.id, item_id).await?;

    if currently_wishlisted {
        db::wishlists::remove_from_wishlist(&state.db, user.id, item_id).await?;
    } else {
        db::wishlists::add_to_wishlist(&state.db, user.id, item_id).await?;
    }

    Ok(Json(serde_json::json!({ "wishlisted": !currently_wishlisted })))
}