// Package router ...
//
// Description : router ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2025-10-30 15:39
package router

import (
	"reflect"

	"git.zhangdeman.cn/zhangdeman/gin/logger"
	"github.com/gin-gonic/gin"
)

// GetCommonParam 获取公共参数
type GetCommonParam func(ctx *gin.Context) (any, error)

// AddCommonParamRule 添加公共参数注入规则
func (s *server) AddCommonParamRule(fieldName string, getParamFunc GetCommonParam) {
	s.commonParam[fieldName] = getParamFunc
}

// AddCommonParamRules 批量添加公共参数注入规则
func (s *server) AddCommonParamRules(rules map[string]GetCommonParam) {
	for fieldName, rule := range rules {
		s.AddCommonParamRule(fieldName, rule)
	}
}

// injectCommonParam 注入公共参数
func (s *server) injectCommonParam(ctx *gin.Context, formValue any) error {
	reflectType := reflect.TypeOf(formValue)
	fieldTable := map[string]bool{}
	fieldNum := reflectType.Elem().NumField()
	for i := 0; i < fieldNum; i++ {
		// 提取全部结构体字段
		fieldTable[reflectType.Elem().Field(i).Name] = true
	}
	reflectValue := reflect.ValueOf(formValue)
	for fieldName, getParamFunc := range s.commonParam {
		if _, ok := fieldTable[fieldName]; !ok {
			// 结构体字段未配置自动注入
			continue
		}
		if val, err := getParamFunc(ctx); nil != err {
			logger.Instance.Error("inject common param failed")
			return err
		}
		reflectValue.Elem().FieldByName(fieldName)
	}
}