import { SlideoutMenu } from '@/components/application/slideout-menus/slideout-menu';
import { formatPhone, formatShortDate } from '@/lib/format';
import type { Lead, LeadActivity, LeadActivityType } from '@/types/entities';
import { cx } from '@/utils/cx';

type LeadActivitySlideoutProps = {
    isOpen: boolean;
    onOpenChange: (open: boolean) => void;
    lead: Lead;
    activities: LeadActivity[];
};

type ActivityConfig = {
    icon: string;
    dotClass: string;
    label: string;
};

const ACTIVITY_CONFIG: Record<LeadActivityType, ActivityConfig> = {
    STATUS_CHANGE: { icon: '🔄', dotClass: 'bg-brand-secondary', label: 'Status Changed' },
    CALL_MADE: { icon: '📞', dotClass: 'bg-brand-secondary', label: 'Call Made' },
    CALL_RECEIVED: { icon: '📲', dotClass: 'bg-brand-secondary', label: 'Call Received' },
    WHATSAPP_SENT: { icon: '💬', dotClass: 'bg-success-solid', label: 'WhatsApp Sent' },
    WHATSAPP_RECEIVED: { icon: '💬', dotClass: 'bg-success-solid', label: 'WhatsApp Received' },
    SMS_SENT: { icon: '✉️', dotClass: 'bg-brand-secondary', label: 'SMS Sent' },
    EMAIL_SENT: { icon: '📧', dotClass: 'bg-brand-secondary', label: 'Email Sent' },
    EMAIL_RECEIVED: { icon: '📧', dotClass: 'bg-brand-secondary', label: 'Email Received' },
    NOTE_ADDED: { icon: '📝', dotClass: 'bg-warning-solid', label: 'Note Added' },
    ASSIGNED: { icon: '📤', dotClass: 'bg-brand-secondary', label: 'Assigned' },
    APPOINTMENT_BOOKED: { icon: '📅', dotClass: 'bg-brand-secondary', label: 'Appointment Booked' },
    FOLLOW_UP_CREATED: { icon: '🔁', dotClass: 'bg-brand-secondary', label: 'Follow-up Created' },
    CONVERTED: { icon: '✅', dotClass: 'bg-success-solid', label: 'Converted' },
    MARKED_SPAM: { icon: '🚫', dotClass: 'bg-error-solid', label: 'Marked as Spam' },
    DUPLICATE_DETECTED: { icon: '🔍', dotClass: 'bg-warning-solid', label: 'Duplicate Detected' },
};

const DEFAULT_CONFIG: ActivityConfig = { icon: '📌', dotClass: 'bg-tertiary', label: 'Activity' };

const StatusChangeContent = ({ previousValue, newValue }: { previousValue: string | null; newValue: string | null }) => (
    <span className="text-sm text-secondary">
        {previousValue && (
            <span className="mr-1 text-sm line-through text-quaternary">{previousValue}</span>
        )}
        {previousValue && newValue && '→ '}
        {newValue && <span className="font-medium text-brand-secondary">{newValue}</span>}
    </span>
);

const ActivityItem = ({ activity, isLast }: { activity: LeadActivity; isLast: boolean }) => {
    const type = activity.activityType;
    const config = type ? (ACTIVITY_CONFIG[type] ?? DEFAULT_CONFIG) : DEFAULT_CONFIG;
    const occurredAt = activity.occurredAt ? formatShortDate(activity.occurredAt) : '';

    return (
        <div className="relative flex gap-3 pb-4">
            {/* Vertical connecting line */}
            {!isLast && (
                <div className="absolute left-[15px] top-[36px] bottom-0 w-0.5 bg-tertiary" />
            )}

            {/* Dot */}
            <div
                className={cx(
                    'relative z-10 flex size-8 shrink-0 items-center justify-center rounded-full text-sm',
                    config.dotClass,
                )}
                aria-hidden="true"
            >
                {config.icon}
            </div>

            {/* Content */}
            <div className="flex flex-1 flex-col gap-0.5 pt-1 min-w-0">
                <div className="flex items-start gap-2">
                    <span className="flex-1 text-sm font-semibold text-primary">
                        {activity.summary ?? config.label}
                    </span>
                </div>

                {type === 'STATUS_CHANGE' && (activity.previousValue || activity.newValue) && (
                    <StatusChangeContent previousValue={activity.previousValue} newValue={activity.newValue} />
                )}

                {type !== 'STATUS_CHANGE' && activity.newValue && (
                    <p className="text-xs text-tertiary">{activity.newValue}</p>
                )}

                <p className="text-xs text-quaternary">
                    {occurredAt}
                    {activity.performedBy ? ` · by ${activity.performedBy}` : ''}
                </p>
            </div>
        </div>
    );
};

export const LeadActivitySlideout = ({ isOpen, onOpenChange, lead, activities }: LeadActivitySlideoutProps) => {
    const firstName = lead.contactName?.firstName ?? '';
    const lastName = lead.contactName?.lastName ?? '';
    const fullName = `${firstName} ${lastName}`.trim() || 'Unknown Lead';
    const phone = lead.contactPhone?.[0] ? formatPhone(lead.contactPhone[0]) : null;
    const email = lead.contactEmail?.[0]?.address ?? null;

    const filteredActivities = activities
        .filter((a) => a.leadId === lead.id)
        .sort((a, b) => {
            if (!a.occurredAt) return 1;
            if (!b.occurredAt) return -1;
            return new Date(b.occurredAt).getTime() - new Date(a.occurredAt).getTime();
        });

    return (
        <SlideoutMenu isOpen={isOpen} onOpenChange={onOpenChange} isDismissable>
            {({ close }) => (
                <>
                    <SlideoutMenu.Header onClose={close}>
                        <div className="flex flex-col gap-0.5 pr-8">
                            <h2 className="text-lg font-semibold text-primary">Lead Activity — {fullName}</h2>
                            <p className="text-sm text-tertiary">
                                {[phone, email, lead.leadSource, lead.utmCampaign]
                                    .filter(Boolean)
                                    .join(' · ')}
                            </p>
                        </div>
                    </SlideoutMenu.Header>

                    <SlideoutMenu.Content>
                        {filteredActivities.length === 0 ? (
                            <div className="flex flex-col items-center justify-center gap-2 py-12 text-center">
                                <span className="text-3xl">📭</span>
                                <p className="text-sm font-medium text-secondary">No activity yet</p>
                                <p className="text-xs text-tertiary">Activity will appear here as interactions occur.</p>
                            </div>
                        ) : (
                            <div className="flex flex-col">
                                {filteredActivities.map((activity, idx) => (
                                    <ActivityItem
                                        key={activity.id}
                                        activity={activity}
                                        isLast={idx === filteredActivities.length - 1}
                                    />
                                ))}
                            </div>
                        )}
                    </SlideoutMenu.Content>
                </>
            )}
        </SlideoutMenu>
    );
};