package service

import (
	"context"

	"go.infratographer.com/x/events"
	"go.infratographer.com/x/gidx"

	"go.equinixmetal.net/infra9-metal-bridge/internal/metal/models"
)

const projectEvent = "metalproject"

// buildProjectRelationships compiles all relations into a relationships object to be processed by the processors.
func (s *service) buildProjectRelationships(project *models.ProjectDetails) (Relationships, error) {
	relations := Relationships{
		Resource: project,
		// Relate project to organization.
		Parent: Relation{
			Resource: project.Organization,
			Relation: RelateParent,
		},
	}

	for _, member := range project.Memberships {
		for _, role := range member.Roles {
			if _, ok := s.roles[role]; !ok {
				s.logger.Warnf("unrecognized project role '%s' for %s on %s", role, member.User.PrefixedID(), project.PrefixedID())

				continue
			}

			relations.Memberships = append(relations.Memberships, ResourceMemberships{
				Role:   role,
				Member: member.User,
			})
		}
	}

	return relations, nil
}

// IsProjectID checks if the provided id has the metal project prefix.
func (s *service) IsProjectID(id gidx.PrefixedID) bool {
	if idType, ok := s.idPrefixMap[id.Prefix()]; ok {
		return idType == TypeProject
	}

	return false
}

// TouchProject initializes a sync for the provided project id for relationships and memberships.
func (s *service) TouchProject(ctx context.Context, id gidx.PrefixedID) error {
	logger := s.logger.With("project.id", id.String())

	project, err := s.metal.GetProjectDetails(ctx, id)
	if err != nil {
		logger.Errorw("failed to get project", "error", err)

		return err
	}

	relationships, err := s.buildProjectRelationships(project)
	if err != nil {
		logger.Errorw("failed to build project relationships", "error", err)

		return err
	}

	relationshipChanges := s.processRelationships(ctx, projectEvent, relationships)
	rolesChanged, assignmentsChanged := s.syncMemberships(ctx, relationships, false)

	s.logger.Infow("project sync complete",
		"resource.id", project.PrefixedID(),
		"relationships.changed", relationshipChanges,
		"membership.roles_changed", rolesChanged,
		"membership.assignments_changed", assignmentsChanged,
	)

	return nil
}

// DeleteProject deletes the provided project id.
func (s *service) DeleteProject(ctx context.Context, id gidx.PrefixedID) error {
	err := s.publisher.PublishChange(ctx, projectEvent, events.ChangeMessage{
		SubjectID: id,
		EventType: string(events.DeleteChangeType),
	})
	if err != nil {
		s.logger.Errorw("error publishing project delete",
			"subject_type", projectEvent,
			"resource.id", id,
			"error", err,
		)
	}

	return nil
}