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::service::user::appearance::UpdateUserAppearanceParams;
use crate::session::Session;

/// Update user appearance settings
///
/// Updates the authenticated user's UI appearance preferences.
/// Requires authentication.
///
/// Updatable fields:
/// - theme: UI theme ("system", "light", "dark")
/// - color_scheme: Color scheme ("system", "light", "dark")
/// - density: UI density ("compact", "comfortable")
/// - font_size: Font size ("small", "medium", "large")
/// - editor_theme: Code editor theme name
/// - markdown_preview: Enable/disable markdown live preview
/// - reduced_motion: Enable/disable reduced motion
///
/// All fields are optional; only provided fields are updated.
/// Returns the updated appearance settings.
#[utoipa::path(
    put,
    path = "/api/v1/user/appearance",
    tag = "User",
    operation_id = "userUpdateAppearance",
    request_body(
        content = UpdateUserAppearanceParams,
        description = "Appearance update parameters (all fields optional)",
        content_type = "application/json"
    ),
    responses(
        (status = 200, description = "Appearance settings updated successfully. Returns all updated UI preferences.", body = ApiResponse<UserAppearance>),
        (status = 400, description = "Invalid parameters: unsupported theme, color scheme, density, or font size", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn update_appearance(
    service: web::Data<AppService>,
    session: Session,
    params: web::Json<UpdateUserAppearanceParams>,
) -> Result<HttpResponse, AppError> {
    let appearance = service
        .user
        .user_update_appearance(&session, params.into_inner())
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(appearance)))
}