use axum::response::Json;
use serde_json::Value;
use utoipa::OpenApi;

use crate::{ApiDoc, AuthApiDoc, ConfigApiDoc, WorkflowApiDoc, MessageApiDoc};

/// GET /docs/openapi.json
///
/// 返回 OpenAPI 3.0 规范 JSON 文档，合并所有模块的路径和 schema。
pub async fn openapi_spec() -> Json<Value> {
    let mut spec = ApiDoc::openapi();
    spec.merge(AuthApiDoc::openapi());
    spec.merge(ConfigApiDoc::openapi());
    spec.merge(WorkflowApiDoc::openapi());
    spec.merge(MessageApiDoc::openapi());

    Json(serde_json::to_value(spec).unwrap_or_default())
}