import type { TeamMembership } from '../../../services/collaborationTeam';

/** Clinicians actively on the team, in-practice and outside alike. */
export const activeClinicianCount = (members: TeamMembership[]): number =>
    members.filter((member) =>
        member.state === 'active'
        && (member.memberClass === 'practitioner' || member.memberClass === 'external-practitioner'),
    ).length;

/** "3 clinicians". The card puts it after the practice name, which is shown only when it is known. */
export const clinicianCountLabel = (clinicians: number): string =>
    `${clinicians} clinician${clinicians === 1 ? '' : 's'}`;

/** "Joined 12 Mar", dated by the membership's last change, which for an active one is its move to active. */
export const joinedLabel = (membership: TeamMembership | undefined): string | undefined => {
    if (membership?.state !== 'active' || !membership.updatedAt) return undefined;
    const at = new Date(membership.updatedAt);
    if (Number.isNaN(at.getTime())) return undefined;
    return `Joined ${at.toLocaleDateString('en-GB', { day: 'numeric', month: 'short' })}`;
};