package service

import (
	appErrors "nex/backend/pkg/errors"

	"nex/backend/internal/domain"
	"nex/backend/internal/repository"
)

type routingService struct {
	modelRepo    repository.ModelRepository
	providerRepo repository.ProviderRepository
}

func NewRoutingService(modelRepo repository.ModelRepository, providerRepo repository.ProviderRepository) RoutingService {
	return &routingService{modelRepo: modelRepo, providerRepo: providerRepo}
}

func (s *routingService) RouteByModelName(providerID, modelName string) (*domain.RouteResult, error) {
	model, err := s.modelRepo.FindByProviderAndModelName(providerID, modelName)
	if err != nil {
		return nil, appErrors.ErrModelNotFound
	}

	if !model.Enabled {
		return nil, appErrors.ErrModelDisabled
	}

	provider, err := s.providerRepo.GetByID(model.ProviderID)
	if err != nil {
		return nil, appErrors.ErrProviderNotFound
	}

	if !provider.Enabled {
		return nil, appErrors.ErrProviderDisabled
	}

	return &domain.RouteResult{
		Provider: provider,
		Model:    model,
	}, nil
}