import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import {
    faBuilding,
    faCircle,
    faCircleCheck,
    faCopy,
    faHeadset,
    faPenToSquare,
    faPhone,
    faRobot,
    faStethoscope,
    faUser,
    faUsers,
} from '@fortawesome/pro-duotone-svg-icons';

// Reusable right-pane preview components for the onboarding wizard.
// Each one is a pure presentation component that takes already-fetched
// data as props — the parent step component owns the state + fetches
// + refetches after a successful save. Keeping the panes data-only
// means the active step can pass the same source of truth to both
// the middle (form) pane and this preview without two GraphQL queries
// running side by side.

// Shared title/empty state primitives so every pane has the same
// visual rhythm.
const PaneCard = ({
    title,
    count,
    children,
}: {
    title: string;
    count?: number;
    children: React.ReactNode;
}) => (
    <div className="rounded-xl border border-secondary bg-primary shadow-xs">
        <div className="flex items-center justify-between border-b border-secondary px-4 py-3">
            <p className="text-xs font-semibold uppercase tracking-wider text-quaternary">{title}</p>
            {typeof count === 'number' && (
                <span className="rounded-full bg-secondary px-2 py-0.5 text-xs font-semibold text-tertiary">
                    {count}
                </span>
            )}
        </div>
        {children}
    </div>
);

const EmptyState = ({ message }: { message: string }) => (
    <div className="px-4 py-6 text-center text-xs text-tertiary">{message}</div>
);

// ---------------------------------------------------------------------------
// Identity step — short "about this step" card. Explains what the
// admin is configuring and where it shows up in the staff portal so
// the right pane stays useful even when there's nothing to list yet.
// ---------------------------------------------------------------------------

const IDENTITY_BULLETS: { title: string; body: string }[] = [
    {
        title: 'Hospital name',
        body: 'Shown on the staff portal sidebar, the login screen, and every patient-facing widget greeting.',
    },
    {
        title: 'Logo',
        body: 'Used as the avatar at the top of the staff portal and on the website widget header. Square images work best.',
    },
    {
        title: 'Brand identity',
        body: 'Colors, fonts and login copy live on the full Branding page — open it from Settings any time after setup.',
    },
];

export const IdentityRightPane = () => (
    <PaneCard title="About this step">
        <div className="px-4 py-4">
            <p className="text-sm text-tertiary">
                This is how patients and staff first see your hospital across Helix Engage.
                Get the basics in now — you can polish branding later.
            </p>
            <ul className="mt-4 flex flex-col gap-3">
                {IDENTITY_BULLETS.map((b) => (
                    <li key={b.title} className="flex items-start gap-2.5">
                        <FontAwesomeIcon
                            icon={faCircleCheck}
                            className="mt-0.5 size-4 shrink-0 text-fg-brand-primary"
                        />
                        <div>
                            <p className="text-sm font-semibold text-primary">{b.title}</p>
                            <p className="text-xs text-tertiary">{b.body}</p>
                        </div>
                    </li>
                ))}
            </ul>
        </div>
    </PaneCard>
);

// ---------------------------------------------------------------------------
// Clinics step — list of clinics created so far.
// ---------------------------------------------------------------------------

export type ClinicSummary = {
    id: string;
    clinicName: string | null;
    addressCity?: string | null;
    clinicStatus?: string | null;
};

export const ClinicsRightPane = ({ clinics }: { clinics: ClinicSummary[] }) => (
    <PaneCard title="Clinics added" count={clinics.length}>
        {clinics.length === 0 ? (
            <EmptyState message="No clinics yet — add your first one in the form on the left." />
        ) : (
            <ul className="divide-y divide-secondary">
                {clinics.map((c) => (
                    <li key={c.id} className="flex items-start gap-3 px-4 py-3">
                        <div className="flex size-9 shrink-0 items-center justify-center rounded-full bg-brand-secondary text-brand-secondary">
                            <FontAwesomeIcon icon={faBuilding} className="size-4" />
                        </div>
                        <div className="min-w-0 flex-1">
                            <p className="truncate text-sm font-semibold text-primary">
                                {c.clinicName ?? 'Unnamed clinic'}
                            </p>
                            <p className="truncate text-xs text-tertiary">
                                {c.addressCity ?? 'No city'}
                                {c.clinicStatus && ` · ${c.clinicStatus.toLowerCase()}`}
                            </p>
                        </div>
                    </li>
                ))}
            </ul>
        )}
    </PaneCard>
);

// ---------------------------------------------------------------------------
// Doctors step — grouped by department, since the user explicitly asked
// for "doctors grouped by department" earlier in the design discussion.
// ---------------------------------------------------------------------------

export type DoctorSummary = {
    id: string;
    fullName: { firstName: string | null; lastName: string | null } | null;
    department?: string | null;
    specialty?: string | null;
};

const doctorDisplayName = (d: DoctorSummary): string => {
    const first = d.fullName?.firstName?.trim() ?? '';
    const last = d.fullName?.lastName?.trim() ?? '';
    const full = `${first} ${last}`.trim();
    return full.length > 0 ? full : 'Unnamed';
};

export const DoctorsRightPane = ({ doctors }: { doctors: DoctorSummary[] }) => {
    // Group by department. Doctors with no department land in
    // "Unassigned" so they're not silently dropped.
    const grouped: Record<string, DoctorSummary[]> = {};
    for (const d of doctors) {
        const key = d.department?.trim() || 'Unassigned';
        (grouped[key] ??= []).push(d);
    }
    const sortedKeys = Object.keys(grouped).sort();

    return (
        <PaneCard title="Doctors added" count={doctors.length}>
            {doctors.length === 0 ? (
                <EmptyState message="No doctors yet — add your first one in the form on the left." />
            ) : (
                <div className="divide-y divide-secondary">
                    {sortedKeys.map((dept) => (
                        <div key={dept} className="px-4 py-3">
                            <p className="text-xs font-semibold uppercase tracking-wider text-quaternary">
                                {dept}{' '}
                                <span className="text-tertiary">({grouped[dept].length})</span>
                            </p>
                            <ul className="mt-2 flex flex-col gap-2">
                                {grouped[dept].map((d) => (
                                    <li
                                        key={d.id}
                                        className="flex items-start gap-2.5 text-sm text-primary"
                                    >
                                        <FontAwesomeIcon
                                            icon={faStethoscope}
                                            className="mt-0.5 size-3.5 text-fg-quaternary"
                                        />
                                        <div className="min-w-0 flex-1">
                                            <p className="truncate font-medium">
                                                {doctorDisplayName(d)}
                                            </p>
                                            {d.specialty && (
                                                <p className="truncate text-xs text-tertiary">
                                                    {d.specialty}
                                                </p>
                                            )}
                                        </div>
                                    </li>
                                ))}
                            </ul>
                        </div>
                    ))}
                </div>
            )}
        </PaneCard>
    );
};

// ---------------------------------------------------------------------------
// Team step — list of employees with role + SIP badge.
// ---------------------------------------------------------------------------

export type TeamMemberSummary = {
    id: string;
    userEmail: string;
    name: { firstName: string | null; lastName: string | null } | null;
    roleLabel: string | null;
    sipExtension: string | null;
    // True if this row represents the currently logged-in admin —
    // suppresses the edit/copy icons since admins shouldn't edit
    // themselves from the wizard.
    isCurrentUser: boolean;
    // True if the parent has the plaintext temp password in memory
    // (i.e. this employee was created in the current session).
    // Drives whether the copy icon shows.
    canCopyCredentials: boolean;
};

const memberDisplayName = (m: TeamMemberSummary): string => {
    const first = m.name?.firstName?.trim() ?? '';
    const last = m.name?.lastName?.trim() ?? '';
    const full = `${first} ${last}`.trim();
    return full.length > 0 ? full : m.userEmail;
};

// Tiny icon button shared between the edit and copy actions on the
// employee row. Kept inline since it's only used here and the styling
// matches the existing right-pane density.
const RowIconButton = ({
    icon,
    title,
    onClick,
}: {
    icon: typeof faPenToSquare;
    title: string;
    onClick: () => void;
}) => (
    <button
        type="button"
        onClick={onClick}
        title={title}
        aria-label={title}
        className="flex size-7 shrink-0 items-center justify-center rounded-md text-fg-quaternary hover:bg-secondary_hover hover:text-fg-tertiary_hover"
    >
        <FontAwesomeIcon icon={icon} className="size-3.5" />
    </button>
);

export const TeamRightPane = ({
    members,
    onEdit,
    onCopy,
}: {
    members: TeamMemberSummary[];
    onEdit?: (memberId: string) => void;
    onCopy?: (memberId: string) => void;
}) => (
    <PaneCard title="Employees" count={members.length}>
        {members.length === 0 ? (
            <EmptyState message="No employees yet — create your first one in the form on the left." />
        ) : (
            <ul className="divide-y divide-secondary">
                {members.map((m) => (
                    <li key={m.id} className="flex items-start gap-3 px-4 py-3">
                        <div className="flex size-9 shrink-0 items-center justify-center rounded-full bg-brand-secondary text-brand-secondary">
                            <FontAwesomeIcon icon={faUser} className="size-4" />
                        </div>
                        <div className="min-w-0 flex-1">
                            <p className="truncate text-sm font-semibold text-primary">
                                {memberDisplayName(m)}
                            </p>
                            <p className="truncate text-xs text-tertiary">
                                {m.userEmail}
                                {m.roleLabel && ` · ${m.roleLabel}`}
                            </p>
                            {m.sipExtension && (
                                <span className="mt-1 inline-flex items-center gap-1 rounded-full bg-success-secondary px-2 py-0.5 text-xs font-medium text-success-primary">
                                    <FontAwesomeIcon icon={faHeadset} className="size-3" />
                                    {m.sipExtension}
                                </span>
                            )}
                        </div>
                        {/* Admin row gets neither button — admins
                            shouldn't edit themselves from here, and
                            their password isn't in our session
                            memory anyway. */}
                        {!m.isCurrentUser && (
                            <div className="flex shrink-0 items-center gap-1">
                                {m.canCopyCredentials && onCopy && (
                                    <RowIconButton
                                        icon={faCopy}
                                        title="Copy login credentials"
                                        onClick={() => onCopy(m.id)}
                                    />
                                )}
                                {onEdit && (
                                    <RowIconButton
                                        icon={faPenToSquare}
                                        title="Edit employee"
                                        onClick={() => onEdit(m.id)}
                                    />
                                )}
                            </div>
                        )}
                    </li>
                ))}
            </ul>
        )}
    </PaneCard>
);

// ---------------------------------------------------------------------------
// Telephony step — live SIP → member mapping.
// ---------------------------------------------------------------------------

export type SipSeatSummary = {
    id: string;
    sipExtension: string | null;
    ozonetelAgentId: string | null;
    workspaceMember: {
        name: { firstName: string | null; lastName: string | null } | null;
        userEmail: string;
    } | null;
};

const seatMemberLabel = (m: SipSeatSummary['workspaceMember']): string => {
    if (!m) return 'Unassigned';
    const first = m.name?.firstName?.trim() ?? '';
    const last = m.name?.lastName?.trim() ?? '';
    const full = `${first} ${last}`.trim();
    return full.length > 0 ? full : m.userEmail;
};

export const TelephonyRightPane = ({ seats }: { seats: SipSeatSummary[] }) => (
    <PaneCard title="SIP seats" count={seats.length}>
        {seats.length === 0 ? (
            <EmptyState message="No SIP seats configured — contact support to provision seats." />
        ) : (
            <ul className="divide-y divide-secondary">
                {seats.map((seat) => {
                    const isAssigned = seat.workspaceMember !== null;
                    return (
                        <li key={seat.id} className="flex items-start gap-3 px-4 py-3">
                            <div
                                className={`flex size-9 shrink-0 items-center justify-center rounded-full ${
                                    isAssigned
                                        ? 'bg-brand-secondary text-brand-secondary'
                                        : 'bg-secondary text-quaternary'
                                }`}
                            >
                                <FontAwesomeIcon icon={faPhone} className="size-4" />
                            </div>
                            <div className="min-w-0 flex-1">
                                <p className="truncate text-sm font-semibold text-primary">
                                    Ext {seat.sipExtension ?? '—'}
                                </p>
                                <p className="truncate text-xs text-tertiary">
                                    {seatMemberLabel(seat.workspaceMember)}
                                </p>
                            </div>
                            {!isAssigned && (
                                <span className="inline-flex shrink-0 items-center rounded-full bg-secondary px-2 py-0.5 text-xs font-medium text-tertiary">
                                    Available
                                </span>
                            )}
                        </li>
                    );
                })}
            </ul>
        )}
    </PaneCard>
);

// ---------------------------------------------------------------------------
// AI step — static cards for each configured actor with last-edited info.
// Filled in once the backend prompt config refactor lands.
// ---------------------------------------------------------------------------

export type AiActorSummary = {
    key: string;
    label: string;
    description: string;
    lastEditedAt: string | null;
    isCustom: boolean;
};

export const AiRightPane = ({ actors }: { actors: AiActorSummary[] }) => (
    <PaneCard title="AI personas" count={actors.length}>
        {actors.length === 0 ? (
            <EmptyState message="Loading personas…" />
        ) : (
            <ul className="divide-y divide-secondary">
                {actors.map((a) => (
                    <li key={a.key} className="flex items-start gap-3 px-4 py-3">
                        <div className="flex size-9 shrink-0 items-center justify-center rounded-full bg-brand-secondary text-brand-secondary">
                            <FontAwesomeIcon icon={faRobot} className="size-4" />
                        </div>
                        <div className="min-w-0 flex-1">
                            <p className="truncate text-sm font-semibold text-primary">
                                {a.label}
                            </p>
                            <p className="truncate text-xs text-tertiary">
                                {a.isCustom
                                    ? `Edited ${a.lastEditedAt ? new Date(a.lastEditedAt).toLocaleDateString() : 'recently'}`
                                    : 'Default'}
                            </p>
                        </div>
                    </li>
                ))}
            </ul>
        )}
    </PaneCard>
);

// Suppress unused-import warnings for icons reserved for future use.
void faCircle;
void faUsers;