import { useMemo } from 'react';
import { useData } from '@/providers/data-provider';
import { scoreAndRankItems } from '@/lib/scoring';
import type { PriorityConfig, ScoreResult } from '@/lib/scoring';
import { cx } from '@/utils/cx';

interface WorklistPreviewProps {
    config: PriorityConfig;
}

const slaColors: Record<string, string> = {
    low: 'bg-success-solid',
    medium: 'bg-warning-solid',
    high: 'bg-error-solid',
    critical: 'bg-error-solid animate-pulse',
};

const slaTextColor: Record<string, string> = {
    low: 'text-success-primary',
    medium: 'text-warning-primary',
    high: 'text-error-primary',
    critical: 'text-error-primary',
};

const shortType: Record<string, string> = {
    missed_call: 'Missed',
    follow_up: 'Follow-up',
    campaign_lead: 'Campaign',
    attempt_2: '2nd Att.',
    attempt_3: '3rd Att.',
};

export const WorklistPreview = ({ config }: WorklistPreviewProps) => {
    const { calls, leads, followUps } = useData();

    const previewItems = useMemo(() => {
        const items: any[] = [];

        if (calls) {
            calls
                .filter((c: any) => c.callStatus === 'MISSED')
                .slice(0, 5)
                .forEach((c: any) => items.push({ ...c, type: 'missed', _label: c.callerNumber?.primaryPhoneNumber ?? c.name ?? 'Unknown' }));
        }

        if (followUps) {
            followUps
                .slice(0, 5)
                .forEach((f: any) => items.push({ ...f, type: 'follow-up', _label: f.name ?? 'Follow-up' }));
        }

        if (leads) {
            leads
                .filter((l: any) => l.campaignId)
                .slice(0, 5)
                .forEach((l: any) => items.push({
                    ...l,
                    type: 'lead',
                    _label: l.contactName ? `${l.contactName.firstName ?? ''} ${l.contactName.lastName ?? ''}`.trim() : l.contactPhone?.primaryPhoneNumber ?? 'Unknown',
                }));
        }

        return items;
    }, [calls, leads, followUps]);

    const scored = useMemo(() => scoreAndRankItems(previewItems, config), [previewItems, config]);

    return (
        <div className="flex flex-col min-h-0">
            <div className="flex items-center justify-between mb-3">
                <h3 className="text-sm font-semibold text-primary">Live Preview</h3>
                <span className="text-xs text-tertiary">{scored.length} items</span>
            </div>
            <div className="rounded-xl border border-secondary overflow-hidden bg-primary">
                {/* Header */}
                <div className="flex items-center gap-2 px-3 py-2 bg-secondary text-xs font-medium text-tertiary border-b border-secondary">
                    <span className="w-3" />
                    <span className="flex-1 min-w-0">Name</span>
                    <span className="w-16 text-right">Score</span>
                </div>
                {/* Rows */}
                <div className="divide-y divide-tertiary overflow-y-auto max-h-[320px]">
                    {scored.map((item: any & ScoreResult, index: number) => (
                        <div
                            key={item.id ?? index}
                            className="flex items-center gap-2 px-3 py-2 hover:bg-primary_hover transition duration-100 ease-linear"
                        >
                            <span className={cx('size-2 rounded-full shrink-0', slaColors[item.slaStatus])} />
                            <div className="flex-1 min-w-0">
                                <div className="text-xs font-medium text-primary truncate">
                                    {item._label ?? item.name ?? 'Item'}
                                </div>
                                <div className="flex items-center gap-1.5 mt-0.5">
                                    <span className="text-[10px] text-tertiary">
                                        {shortType[item.taskType] ?? item.taskType}
                                    </span>
                                    <span className="text-quaternary">&middot;</span>
                                    <span className={cx('text-[10px] font-medium', slaTextColor[item.slaStatus])}>
                                        {item.slaElapsedPercent}% SLA
                                    </span>
                                </div>
                            </div>
                            <span className="w-16 text-right text-sm font-bold tabular-nums text-primary shrink-0">
                                {item.score.toFixed(1)}
                            </span>
                        </div>
                    ))}
                    {scored.length === 0 && (
                        <div className="px-3 py-6 text-center text-xs text-tertiary">
                            No worklist items to preview
                        </div>
                    )}
                </div>
            </div>
        </div>
    );
};