import type { PractitionerRole } from "fhir/r4";
import {
    getExplicitDefaultWorkspace,
    getPractitionerRoleDefaultWorkspace,
    type StaffWorkspace,
} from "./staffRoleCatalog";

/**
 * The workspace a staff member opens in at sign-in. A choice made earlier in this browser wins, then a
 * default somebody set on any of their roles, and only then one inferred from a role's group: a founding
 * admin's Platform Manager role carries no default, so its inferred one must not outrank the Admin role's.
 */
export const chooseSignInWorkspace = ({
    stored,
    selectedRole,
    roles,
    assigned,
    groupOf,
}: {
    stored?: StaffWorkspace | null;
    selectedRole?: PractitionerRole;
    roles: PractitionerRole[];
    assigned: StaffWorkspace[];
    groupOf: (role: PractitionerRole) => string | undefined;
}): StaffWorkspace | undefined => {
    const open = (workspace?: StaffWorkspace | null) => (workspace && assigned.includes(workspace) ? workspace : undefined);
    const explicitOf = (role: PractitionerRole) => getExplicitDefaultWorkspace(role, groupOf(role));

    return open(stored)
        ?? open(selectedRole && explicitOf(selectedRole))
        ?? roles.map(explicitOf).find((workspace) => open(workspace))
        ?? open(selectedRole && getPractitionerRoleDefaultWorkspace(selectedRole, groupOf(selectedRole)))
        ?? roles.map((role) => getPractitionerRoleDefaultWorkspace(role, groupOf(role))).find((workspace) => open(workspace))
        ?? assigned[0];
};