package handler

import (
	"encoding/json"
	"errors"

	"github.com/gin-gonic/gin"

	"github.com/sundynix/pets-be/internal/service"
	"github.com/sundynix/pets-be/pkg/errcode"
	"github.com/sundynix/pets-be/pkg/response"
)

// idParam 取路径参数（字符串雪花 ID）
func idParam(c *gin.Context, key string) string {
	return c.Param(key)
}

// jsonMarshal 便捷序列化
func jsonMarshal(v any) ([]byte, error) {
	return json.Marshal(v)
}

// respondErr 统一错误响应：区分 not found 与内部错误
func respondErr(c *gin.Context, err error) {
	if errors.Is(err, service.ErrNotFound) {
		response.Fail(c, errcode.ErrNotFound, "")
		return
	}
	if errors.Is(err, service.ErrForbidden) {
		response.Fail(c, errcode.ErrForbidden, err.Error())
		return
	}
	if errors.Is(err, service.ErrInvalidParam) {
		response.FailParams(c, err.Error())
		return
	}
	response.FailErr(c, err)
}