package system

import (
	"context"
	"reflect"

	"github.com/perfect-panel/server/initialize"

	"github.com/perfect-panel/server/internal/config"
	"github.com/perfect-panel/server/internal/model/system"
	"github.com/perfect-panel/server/pkg/logger"
	"github.com/perfect-panel/server/pkg/tool"
	"github.com/perfect-panel/server/pkg/xerr"
	"github.com/pkg/errors"
	"gorm.io/gorm"

	"github.com/perfect-panel/server/internal/svc"
	"github.com/perfect-panel/server/internal/types"
)

type UpdateInviteConfigLogic struct {
	logger.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewUpdateInviteConfigLogic(ctx context.Context, svcCtx *svc.ServiceContext) *UpdateInviteConfigLogic {
	return &UpdateInviteConfigLogic{
		Logger: logger.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

func (l *UpdateInviteConfigLogic) UpdateInviteConfig(req *types.InviteConfig) error {
	v := reflect.ValueOf(*req)
	// Get the reflection type of the structure
	t := v.Type()
	err := l.svcCtx.SystemModel.Transaction(l.ctx, func(db *gorm.DB) error {
		var err error
		for i := 0; i < v.NumField(); i++ {
			// Get the field name
			fieldName := t.Field(i).Name
			// Get the field value to string
			fieldValue := tool.ConvertValueToString(v.Field(i))
			// Update existing row; if missing (RowsAffected=0), create it to avoid silent config loss.
			updateResult := db.Model(&system.System{}).
				Where("`category` = 'invite' and `key` = ?", fieldName).
				Update("value", fieldValue)
			err = updateResult.Error
			if err != nil {
				break
			}
			if updateResult.RowsAffected == 0 {
				err = db.Create(&system.System{
					Category: "invite",
					Key:      fieldName,
					Value:    fieldValue,
					Type:     getSystemFieldType(v.Field(i)),
					Desc:     "invite config: " + fieldName,
				}).Error
				if err != nil {
					break
				}
			}
		}
		if err != nil {
			return err
		}
		// clear cache
		return l.svcCtx.Redis.Del(l.ctx, config.InviteConfigKey, config.GlobalConfigKey).Err()
	})
	if err != nil {
		l.Errorw("[UpdateInviteConfig] update invite config error", logger.Field("error", err.Error()))
		return errors.Wrapf(xerr.NewErrCode(xerr.DatabaseUpdateError), "update invite config error: %v", err)
	}
	initialize.Invite(l.svcCtx)
	return nil
}

func getSystemFieldType(field reflect.Value) string {
	kind := field.Kind()
	if kind == reflect.Ptr && !field.IsNil() {
		kind = field.Elem().Kind()
	}
	switch kind {
	case reflect.Bool:
		return "bool"
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return "int"
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
		return "uint"
	case reflect.Float32, reflect.Float64:
		return "float"
	case reflect.String:
		return "string"
	default:
		return "string"
	}
}