package adminkindboxvalidator

import (
	"context"
	"fmt"
	"slices"

	"git.gocasts.ir/ebhomengo/niki/entity"
	params "git.gocasts.ir/ebhomengo/niki/param"
	errmsg "git.gocasts.ir/ebhomengo/niki/pkg/err_msg"
	validation "github.com/go-ozzo/ozzo-validation/v4"
)

type Repository interface {
	KindBoxExist(ctx context.Context, kindBoxID uint) (bool, error)
	GetKindBox(ctx context.Context, kindBoxID uint) (entity.KindBox, error)
}

type AdminSvc interface {
	AgentExistByID(ctx context.Context, agentID uint) (bool, error)
}

type Validator struct {
	repo     Repository
	adminSvc AdminSvc
}

func New(repo Repository, adminSvc AdminSvc) Validator {
	return Validator{repo: repo, adminSvc: adminSvc}
}

func (v Validator) doesKindBoxExist(value interface{}) error {
	kindBoxID, ok := value.(uint)
	if !ok {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	exists, err := v.repo.KindBoxExist(context.Background(), kindBoxID)
	if err != nil {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	if !exists {
		return fmt.Errorf(errmsg.ErrorMsgNotFound)
	}

	return nil
}

func (v Validator) checkKindBoxStatusForAssigningReceiverAgent(value interface{}) error {
	kindboxID, ok := value.(uint)
	if !ok {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	kindBox, err := v.repo.GetKindBox(context.Background(), kindboxID)
	if err != nil {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	if kindBox.Status != entity.KindBoxReadyToReturnStatus {
		return fmt.Errorf(errmsg.ErrorMsgAssignReceiverAgentKindBoxStatus)
	}

	return nil
}

func (v Validator) doesAgentExist(value interface{}) error {
	agentID, ok := value.(uint)
	if !ok {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	exists, err := v.adminSvc.AgentExistByID(context.Background(), agentID)
	if err != nil {
		return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
	}
	if !exists {
		return fmt.Errorf(errmsg.ErrorMsgNotFound)
	}

	return nil
}

func (v Validator) areFilterFieldsValid(validFilters []string) validation.RuleFunc {
	return func(value interface{}) error {
		filters, ok := value.(params.FilterRequest)
		if !ok {
			return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
		}
		for filter := range filters {
			if !slices.Contains(validFilters, filter) {
				return fmt.Errorf(errmsg.ErrorMsgFiltersAreNotValid)
			}
		}
		return nil
	}
}

func (v Validator) areSortFieldsValid(validSortFields []string) validation.RuleFunc {
	return func(value interface{}) error {
		sort, ok := value.(params.SortRequest)
		if !ok {
			return fmt.Errorf(errmsg.ErrorMsgSomethingWentWrong)
		}
		if sort.Field == "" && sort.Direction != "" {
			return fmt.Errorf(errmsg.ErrorMsgSortFieldIsRequired)
		}
		if sort.Direction != "" && sort.Direction != params.AscSortDirection && sort.Direction != params.DescSortDirection {
			return fmt.Errorf(errmsg.ErrorMsgSortDirectionShouldBeAscOrDesc)
		}
		if sort.Field != "" && !slices.Contains(validSortFields, sort.Field) {
			return fmt.Errorf(errmsg.ErrorMsgSortFieldIsNotValid)
		}
		return nil
	}
}