use actix_web::{HttpResponse, web};

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::users::UserAppearance;
use crate::service::AppService;
use crate::session::Session;

/// Get user appearance settings
///
/// Returns the authenticated user's UI appearance preferences including:
/// - Theme (system, light, dark)
/// - Color scheme (system, light, dark)
/// - Density (compact, comfortable)
/// - Font size (small, medium, large)
/// - Editor theme
/// - Markdown preview toggle
/// - Reduced motion toggle
///
/// If no settings exist, defaults are created automatically.
/// Requires authentication.
#[utoipa::path(
    get,
    path = "/api/v1/user/appearance",
    tag = "User",
    operation_id = "userGetAppearance",
    responses(
        (status = 200, description = "Appearance settings retrieved successfully. Returns all UI preference settings.", body = ApiResponse<UserAppearance>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn get_appearance(
    service: web::Data<AppService>,
    session: Session,
) -> Result<HttpResponse, AppError> {
    let appearance = service.user.user_appearance(&session).await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(appearance)))
}