package shared

import (
	"context"

	"galaxy/lobby/internal/domain/common"
	"galaxy/lobby/internal/domain/membership"
	"galaxy/lobby/internal/ports"
)

// CountActiveMemberships returns the number of memberships in
// membership.StatusActive attached to gameID. It is used by the
// application services (submitapplication, approveapplication) to
// evaluate the max_players + start_gap_players roster cap and the
// gap-window activation threshold without each service re-implementing
// the same scan + filter.
func CountActiveMemberships(
	ctx context.Context,
	store ports.MembershipStore,
	gameID common.GameID,
) (int, error) {
	records, err := store.GetByGame(ctx, gameID)
	if err != nil {
		return 0, err
	}
	count := 0
	for _, record := range records {
		if record.Status == membership.StatusActive {
			count++
		}
	}
	return count, nil
}