package usecase

import (
	"context"
	"git.sch9.ru/new_gate/models"
	"git.sch9.ru/new_gate/ms-tester/internal/lib"
)

type ParticipantStorage interface {
	CreateParticipant(ctx context.Context, participant *models.Participant) (int32, error)
	ReadParticipantById(ctx context.Context, id int32) (*models.Participant, error)
	UpdateParticipant(ctx context.Context, participant *models.Participant) error
	DeleteParticipant(ctx context.Context, id int32) error
}

type ParticipantService struct {
	participantStorage ParticipantStorage
	permissionService  IPermissionService
}

func NewParticipantService(
	participantStorage ParticipantStorage,
	permissionService IPermissionService,
) *ParticipantService {
	return &ParticipantService{
		participantStorage: participantStorage,
		permissionService:  permissionService,
	}
}

func (service *ParticipantService) CreateParticipant(ctx context.Context, participant *models.Participant) (int32, error) {
	if !service.permissionService.Allowed(ctx, extractUser(ctx), "create") {
		return 0, lib.ServiceError(nil, lib.ErrNoPermission, "permission denied")
	}
	return service.participantStorage.CreateParticipant(ctx, participant)
}

func (service *ParticipantService) ReadParticipantById(ctx context.Context, id int32) (*models.Participant, error) {
	if !service.permissionService.Allowed(ctx, extractUser(ctx), "read") {
		return nil, lib.ServiceError(nil, lib.ErrNoPermission, "permission denied")
	}
	return service.participantStorage.ReadParticipantById(ctx, id)
}

func (service *ParticipantService) UpdateParticipant(ctx context.Context, participant *models.Participant) error {
	if !service.permissionService.Allowed(ctx, extractUser(ctx), "update") {
		return lib.ServiceError(nil, lib.ErrNoPermission, "permission denied")
	}
	return service.participantStorage.UpdateParticipant(ctx, participant)
}

func (service *ParticipantService) DeleteParticipant(ctx context.Context, id int32) error {
	if !service.permissionService.Allowed(ctx, extractUser(ctx), "delete") {
		return lib.ServiceError(nil, lib.ErrNoPermission, "permission denied")
	}
	return service.participantStorage.DeleteParticipant(ctx, id)
}