package structx

import (
	"fmt"
	"reflect"
	"strconv"
	"strings"
	"code.yun.ink/pkg/convx"
)

type ChangeInfo struct {
	Old string      `json:"old"`
	New string      `json:"new"`
	Val interface{} `json:"val"`
}

// 这个方法将map的数据赋值到结构体中
func AttactToStruct(structxx interface{}, updateMap map[string]string) (map[string]ChangeInfo, error) {
	// 将结构体指针转换为reflect.Value类型
	v := reflect.ValueOf(structxx)
	// 如果v不是指针或者v是零值，直接返回
	if v.Kind() != reflect.Ptr || v.IsNil() {
		return nil, fmt.Errorf("structxx 需要是指针")
	}

	changeMap := make(map[string]ChangeInfo)

	// 获取v指向的元素，也就是结构体本身
	v = v.Elem()
	// 遍历map的键和值
	for k, val := range updateMap {
		// 根据json标签获取结构体中对应的字段
		field := v.FieldByNameFunc(func(name string) bool {
			f, _ := v.Type().FieldByName(name)
			// fmt.Printf("FieldByNameFunc:%+v\n", f)
			js := f.Tag.Get("json")
			s := strings.Split(js, ",")
			if len(s) > 1 {
				return s[0] == k
			}
			return js == k
		})
		// 如果字段存在且可写
		if field.IsValid() && field.CanSet() {
			// 根据字段的类型进行类型转换和赋值
			switch field.Kind() {
			// convx.
			case reflect.Int64:
				// 将字符串转换为int64
				oldi := field.Int()
				olds, _ := convx.ToString(oldi)

				i, _ := strconv.ParseInt(val, 10, 64)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.String:
				olds := field.String()

				field.SetString(val)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: val}
			case reflect.Int:
				oldi := field.Int()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Int32:
				oldi := field.Int()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Int16:
				oldi := field.Int()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Int8:
				oldi := field.Int()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Uint:
				oldi := field.Uint()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Uint32:
				oldi := field.Uint()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Uint16:
				oldi := field.Uint()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Uint8:
				oldi := field.Uint()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Uint64:
				oldi := field.Uint()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToInt64(val)
				field.SetInt(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Float32:
				oldi := field.Float()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToFloat64(val)
				field.SetFloat(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			case reflect.Float64:
				oldi := field.Float()
				olds, _ := convx.ToString(oldi)

				i, _ := convx.ToFloat64(val)
				field.SetFloat(i)

				changeMap[k] = ChangeInfo{Old: olds, New: val, Val: i}
			default:
				fmt.Println("未知类型")
				return nil, fmt.Errorf("未知类型:" + k)
			}
		}
	}
	return changeMap, nil
}