import { cx } from '@/utils/cx';
import { formatCurrency } from '@/lib/format';
import type { Campaign, Ad, Lead, LeadSource } from '@/types/entities';
import { CampaignStatusBadge } from '@/components/shared/status-badge';
import { BudgetBar } from './budget-bar';
import { HealthIndicator } from './health-indicator';

interface CampaignCardProps {
    campaign: Campaign;
    ads: Ad[];
    leads: Lead[];
}

const sourceColors: Record<string, string> = {
    FACEBOOK_AD: 'bg-brand-solid',
    GOOGLE_AD: 'bg-success-solid',
    INSTAGRAM: 'bg-error-solid',
    GOOGLE_MY_BUSINESS: 'bg-warning-solid',
    WEBSITE: 'bg-fg-brand-primary',
    REFERRAL: 'bg-fg-tertiary',
    WHATSAPP: 'bg-success-solid',
    WALK_IN: 'bg-fg-quaternary',
    PHONE: 'bg-fg-secondary',
    OTHER: 'bg-fg-disabled',
};

const sourceLabel = (source: LeadSource): string =>
    source.replace(/_/g, ' ').replace(/\b\w/g, (c) => c.toUpperCase());

const formatDuration = (startDate: string | null, endDate: string | null): string => {
    if (!startDate) return '--';

    const start = new Date(startDate);
    const end = endDate ? new Date(endDate) : new Date();
    const diffDays = Math.ceil((end.getTime() - start.getTime()) / (1000 * 60 * 60 * 24));

    return `${diffDays}d`;
};

export const CampaignCard = ({ campaign, ads, leads }: CampaignCardProps) => {
    const isPaused = campaign.campaignStatus === 'PAUSED';
    const leadCount = campaign.leadCount ?? 0;
    const contactedCount = campaign.contactedCount ?? 0;
    const convertedCount = campaign.convertedCount ?? 0;
    const cac =
        convertedCount > 0 && campaign.amountSpent
            ? formatCurrency(campaign.amountSpent.amountMicros / convertedCount, campaign.amountSpent.currencyCode)
            : '--';

    // Count leads per source
    const sourceCounts = leads.reduce<Record<string, number>>((acc, lead) => {
        const source = lead.leadSource ?? 'OTHER';
        acc[source] = (acc[source] ?? 0) + 1;
        return acc;
    }, {});

    return (
        <div
            className={cx(
                'flex flex-col rounded-2xl border border-secondary bg-primary overflow-hidden transition hover:shadow-lg cursor-pointer h-full',
                isPaused && 'opacity-60',
            )}
        >
            {/* Header */}
            <div className="p-5 pb-4">
                <div className="flex items-start justify-between gap-3">
                    <div className="min-w-0 flex-1">
                        <h3 className="text-md font-bold text-primary truncate">{campaign.campaignName ?? 'Untitled Campaign'}</h3>
                        <div className="mt-1 flex flex-wrap items-center gap-2 text-xs text-tertiary">
                            <span>{campaign.externalCampaignId ?? campaign.id.slice(0, 12)}</span>
                            <span className="text-quaternary">&middot;</span>
                            <span>{ads.length} ad{ads.length !== 1 ? 's' : ''}</span>
                            {campaign.platform && (
                                <>
                                    <span className="text-quaternary">&middot;</span>
                                    <span>{campaign.platform}</span>
                                </>
                            )}
                        </div>
                    </div>
                    <div className="flex shrink-0 items-center gap-2">
                        <span className="rounded-lg bg-brand-primary_alt px-2 py-0.5 text-xs font-medium text-brand-secondary">
                            {formatDuration(campaign.startDate, campaign.endDate)}
                        </span>
                        {campaign.campaignStatus && <CampaignStatusBadge status={campaign.campaignStatus} />}
                    </div>
                </div>
            </div>

            {/* Metrics row */}
            <div className="grid grid-cols-4 gap-2 px-5 pb-4">
                <div className="rounded-xl bg-secondary p-3 text-center">
                    <p className="text-lg font-bold text-brand-secondary">{leadCount}</p>
                    <p className="text-xs text-quaternary">Leads</p>
                </div>
                <div className="rounded-xl bg-secondary p-3 text-center">
                    <p className="text-lg font-bold text-success-primary">{contactedCount}</p>
                    <p className="text-xs text-quaternary">Contacted</p>
                </div>
                <div className="rounded-xl bg-secondary p-3 text-center">
                    <p className="text-lg font-bold text-warning-primary">{convertedCount}</p>
                    <p className="text-xs text-quaternary">Converted</p>
                </div>
                <div className="rounded-xl bg-secondary p-3 text-center">
                    <p className="text-lg font-bold text-primary">{cac}</p>
                    <p className="text-xs text-quaternary">CAC</p>
                </div>
            </div>

            {/* Budget bar */}
            <div className="px-5 pb-4">
                <BudgetBar spent={campaign.amountSpent} budget={campaign.budget} />
            </div>

            {/* Source breakdown */}
            {Object.keys(sourceCounts).length > 0 && (
                <div className="mx-5 border-t border-tertiary px-0 pb-4 pt-3">
                    <div className="flex flex-wrap items-center gap-3">
                        {Object.entries(sourceCounts)
                            .sort(([, a], [, b]) => b - a)
                            .map(([source, count]) => (
                                <div key={source} className="flex items-center gap-1.5">
                                    <span className={cx('h-2 w-2 rounded-full', sourceColors[source] ?? 'bg-fg-disabled')} />
                                    <span className="text-xs text-tertiary">
                                        {sourceLabel(source as LeadSource)} ({count})
                                    </span>
                                </div>
                            ))}
                    </div>
                </div>
            )}

            {/* Health indicator */}
            <div className="mx-5 border-t border-tertiary px-0 pb-4 pt-3">
                <HealthIndicator campaign={campaign} leads={leads} />
            </div>
        </div>
    );
};