import {
    getCoupledOrgRoleCodeForWorkspace,
    getCoupledWorkspaceForOrgRole,
    getOrgRoleByCode,
    getWorkspaceLabel,
    type StaffWorkspace,
} from './staffRoleCatalog';

export type CoupledRemovalTarget =
    | { kind: 'role'; code: string }
    | { kind: 'workspace'; workspace: StaffWorkspace };

export interface CoupledRemovalDescription {
    removedLabel: string;
    partnerLabel: string;
    message: string;
}

const roleLabel = (code: string): string => getOrgRoleByCode(code)?.display ?? code;

// Returns undefined when the target is not half of a coupled pair - callers use that to mean
// "remove immediately, show no dialog". All pair knowledge comes from staffRoleCatalog.
export const describeCoupledRemoval = (
    target: CoupledRemovalTarget,
): CoupledRemovalDescription | undefined => {
    if (target.kind === 'role') {
        const workspace = getCoupledWorkspaceForOrgRole(target.code);
        if (!workspace) return undefined;
        const removedLabel = roleLabel(target.code);
        const partnerLabel = getWorkspaceLabel(workspace);
        return {
            removedLabel,
            partnerLabel,
            message: `Removing the ${removedLabel} role will also remove the ${partnerLabel} workspace.`,
        };
    }

    const code = getCoupledOrgRoleCodeForWorkspace(target.workspace);
    if (!code) return undefined;
    const removedLabel = getWorkspaceLabel(target.workspace);
    const partnerLabel = roleLabel(code);
    return {
        removedLabel,
        partnerLabel,
        message: `Removing the ${removedLabel} workspace will also remove the ${partnerLabel} role.`,
    };
};