package support

import (
	"encoding/json"
	"reflect"

	"git.fsdpf.net/go/contracts"
	"github.com/spf13/cast"
)

type OperationAccess struct {
	typ  reflect.Kind // 只能为 reflect.Int 和 reflect.String
	data map[string][]any
}

func (this OperationAccess) Get(k string) []any {
	items, ok := this.data[k]

	if !ok {
		return nil
	}

	return items
}

func (this *OperationAccess) Set(k string, v []any) error {
	this.data[k] = []any{}
	return this.Push(k, v...)
}

func (this *OperationAccess) Push(k string, input ...any) error {
	if _, ok := this.data[k]; !ok {
		this.Set(k, []any{})
	}

	for i := 0; i < len(input); i++ {
		if v, err := this.Convert(input[i]); err != nil {
			return err
		} else {
			this.data[k] = append(this.data[k], v)
		}
	}

	return nil
}

func (this OperationAccess) Convert(v any) (any, error) {
	if this.typ == reflect.Int {
		return cast.ToIntE(v)
	}
	return cast.ToStringE(v)
}

func (this OperationAccess) Exist(k string, v any) bool {
	items, ok := this.data[k]

	if !ok {
		return false
	}

	flag, err := this.Convert(v)

	if err != nil {
		return false
	}

	for i := 0; i < len(items); i++ {
		if items[i] == flag {
			return true
		}
	}

	return false
}

func (this OperationAccess) MarshalJSON() ([]byte, error) {
	temp := [][2]any{}

	for k, v := range this.data {
		temp = append(temp, [2]any{k, v})
	}

	return json.Marshal(temp)
}

func NewOperationAccess(m contracts.Model) OperationAccess {
	// 主键类型
	tPkType := reflect.String

	if tPk, ok := GetStructField(m.GetQueryFieldsStruct(), m.GetPrimaryKey()); ok {
		switch tPk.Type.Kind() {
		case reflect.Int, reflect.Int32, reflect.Int64,
			reflect.Uint, reflect.Uint32, reflect.Uint64:
			tPkType = reflect.Int
		}
	}

	return OperationAccess{typ: tPkType, data: map[string][]any{}}
}