package app

import (
	"encoding/json"

	js "github.com/swaggest/jsonschema-go"
)

// Generates json schema for app's config.AppConfig
func (app *App) Schema() ([]byte, error) {
	r := js.Reflector{}

	s, err := r.Reflect(*app.cfg)
	if err != nil {
		return nil, err
	}

	return json.MarshalIndent(s, "", "  ")
}

// Generates json schema for custom config
// which embeds *config.AppConfig into it
// Panics if no *config.AppConfig is embedded into custom
// config type
//
// See swaggest/jsonschema-go for struct tag docs
func CustomSchema[T any](target T) ([]byte, error) {
	if err := HasAppConfig(target); err != nil {
		panic(err.Error())
	}

	r := js.Reflector{}

	s, err := r.Reflect(target)
	if err != nil {
		return nil, err
	}

	return json.MarshalIndent(s, "", "  ")
}