"use client";
import Image from 'next/image';
import React from 'react';
import type { TcgCard } from '@/types/pokemon';
import SetBadge from './SetBadge';
import type { VariantKey, VariantState } from '@/lib/checklist';
import { useUsdGbpRate } from '@/lib/useExchangeRate';
import { dispatchReverseOverride, loadOverridesClient } from '@/lib/overrides';

export default function CardItem({ card, checked, onToggle }:{ card: TcgCard; checked: VariantState; onToggle: (id:string, key: VariantKey)=>void }) {
  const rate = useUsdGbpRate();
  const [imageFailed, setImageFailed] = React.useState<boolean>(false);
  const hasHolo = !!(card.variants?.holofoil || (card.tcgplayer as any)?.prices?.holofoil);
  const hasReverseDetected = !!(card.variants?.reverseHolofoil || (card.tcgplayer as any)?.prices?.reverseHolofoil);
  const [reverseOverride, setReverseOverride] = React.useState<boolean>(false);
  const [reverseRemoved, setReverseRemoved] = React.useState<boolean>(false);
  const hasReverse = (hasReverseDetected && !reverseRemoved) || reverseOverride;
  const prices = (card as any).tcgplayer?.prices || {};
  const rarityFull = card.rarity || '';
  const rarityAbbr = (() => {
    const r = rarityFull.toLowerCase();
    // Specific token-based shortcuts first
    if (r.includes('vmax')) return 'VMAX';
    if (r.includes('vstar')) return 'VSTAR';
    if (r.includes('gx')) return 'GX';
    if (r.includes('ex')) return 'EX';
    if (r.includes('v ')) return 'V';
    if (r === 'v') return 'V';
    if (r.includes('secret')) return 'SR';
    if (r.includes('ultra')) return 'UR';
    if (r.includes('reverse')) return 'RH';
    if (r.includes('holo')) return 'HR';
    if (r.includes('promo')) return 'P';
    // Specific before generic 'rare'
    if (r.includes('illustration') && r.includes('rare')) return 'IR';
    if (r.includes('rare')) return 'R';
    if (r.includes('uncommon')) return 'U';
    if (r.includes('common')) return 'C';
    // Fallback: first letter of first word uppercased
    return rarityFull ? rarityFull.charAt(0).toUpperCase() : '';
  })();

  // Initialize local override based on server overrides to show the − toggle on reloads
  React.useEffect(() => {
    let cancelled = false;
    (async () => {
      const map = await loadOverridesClient();
      if (!cancelled && map && typeof map === 'object') {
        if (map[card.id]) {
          setReverseOverride(true);
          setReverseRemoved(false);
        }
      }
    })();
    return () => { cancelled = true; };
  }, [card.id]);
  const getPrice = (key: VariantKey): number | undefined => {
    const map: Record<VariantKey, string> = {
      base: 'normal',
      holofoil: 'holofoil',
      reverseHolofoil: 'reverseHolofoil',
    };
    const entry = prices[map[key]];
    if (!entry) return undefined;
    const value = entry.market ?? entry.mid ?? entry.low ?? entry.high;
    return typeof value === 'number' ? value : undefined;
  };
  const fmtGBP = (usd?: number) => {
    if (typeof usd !== 'number') return undefined;
    const gbp = usd * rate;
    try {
      return new Intl.NumberFormat('en-GB', { style: 'currency', currency: 'GBP', maximumFractionDigits: 2 }).format(gbp);
    } catch {
      return `£${gbp.toFixed(2)}`;
    }
  };
  return (
    <div className="group relative overflow-hidden rounded-lg border border-slate-200 bg-white shadow-sm hover:shadow-md transition">
      <div className="relative aspect-[3/4] w-full bg-slate-100">
        <Image
          src={imageFailed ? '/card-placeholder.svg' : card.images.small}
          onError={() => setImageFailed(true)}
          alt={`${card.name} #${card.number}`}
          fill
          className="object-contain p-3"
          sizes="(max-width: 768px) 50vw, (max-width: 1200px) 25vw, 20vw"
        />
      </div>
      <div className="p-3 flex flex-col gap-2">
        <div className="flex items-center justify-between gap-2">
          {(() => {
            const titleText = `${card.name} #${card.number}`;
            const len = titleText.length;
            const size = len > 34 ? 'text-xs' : len > 24 ? 'text-sm' : 'text-base';
            return (
              <div className="flex items-center gap-1 min-w-0">
                <h3 className={`font-medium ${size} leading-tight truncate`} title={titleText}>
                  {card.name} <span className="text-slate-500">#{card.number}</span>
                </h3>
                {/* Show + only if no detected reverse and no override; show − only if override currently active */}
                {(!hasReverseDetected && !reverseOverride) && (
                  <button
                    type="button"
                    title="Add Reverse variant"
                    aria-label="Add Reverse variant"
                    className="ml-1 inline-flex h-5 w-5 items-center justify-center rounded border border-slate-300 text-slate-600 hover:bg-slate-50 text-xs flex-shrink-0"
                    onClick={async (e) => {
                      e.stopPropagation();
                      try {
                        await fetch('/api/magikarp/override', {
                          method: 'POST',
                          headers: { 'Content-Type': 'application/json' },
                          body: JSON.stringify({ id: card.id, reverseHolofoil: true }),
                        });
                        setReverseOverride(true);
                        // Notify app to recompute availableVariants immediately
                        dispatchReverseOverride(card.id, true);
                      } catch {}
                    }}
                  >
                    +
                  </button>
                )}
                {reverseOverride && (
                  <button
                    type="button"
                    title="Remove Reverse variant"
                    aria-label="Remove Reverse variant"
                    className="ml-1 inline-flex h-5 w-5 items-center justify-center rounded border border-slate-300 text-slate-600 hover:bg-slate-50 text-xs flex-shrink-0"
                    onClick={async (e) => {
                      e.stopPropagation();
                      try {
                        await fetch('/api/magikarp/override', {
                          method: 'POST',
                          headers: { 'Content-Type': 'application/json' },
                          body: JSON.stringify({ id: card.id, reverseHolofoil: false }),
                        });
                        setReverseOverride(false);
                        setReverseRemoved(true);
                        // Notify app to recompute availableVariants immediately
                        dispatchReverseOverride(card.id, false);
                      } catch {}
                    }}
                  >
                    −
                  </button>
                )}
              </div>
            );
          })()}
          {rarityFull ? (
            <span
              className="text-[0.7rem] rounded bg-slate-100 px-2 py-0.5 text-slate-600"
              title={rarityFull}
            >
              {rarityAbbr}
            </span>
          ) : null}
        </div>
        <SetBadge set={card.set} />
        <div className="pt-1 flex flex-wrap gap-2">
          <label className="inline-flex items-center gap-2 text-xs bg-white px-2 py-1 rounded border border-slate-200">
            <input
              type="checkbox"
              checked={!!checked.base}
              onChange={() => onToggle(card.id, 'base')}
              className="h-4 w-4 rounded border-slate-300 text-sky-600 focus:ring-sky-500"
              aria-label={`Mark ${card.name} #${card.number} (base) as collected`}
            />
            <span>Base{fmtGBP(getPrice('base')) ? ` — ${fmtGBP(getPrice('base'))}` : ''}</span>
          </label>
          {hasHolo && (
            <label className="inline-flex items-center gap-2 text-xs bg-white px-2 py-1 rounded border border-slate-200">
              <input
                type="checkbox"
                checked={!!checked.holofoil}
                onChange={() => onToggle(card.id, 'holofoil')}
                className="h-4 w-4 rounded border-slate-300 text-sky-600 focus:ring-sky-500"
                aria-label={`Mark ${card.name} #${card.number} (holo) as collected`}
              />
              <span>Holo{fmtGBP(getPrice('holofoil')) ? ` — ${fmtGBP(getPrice('holofoil'))}` : ''}</span>
            </label>
          )}
          {hasReverse && (
            <label className="inline-flex items-center gap-2 text-xs bg-white px-2 py-1 rounded border border-slate-200">
              <input
                type="checkbox"
                checked={!!checked.reverseHolofoil}
                onChange={() => onToggle(card.id, 'reverseHolofoil')}
                className="h-4 w-4 rounded border-slate-300 text-sky-600 focus:ring-sky-500"
                aria-label={`Mark ${card.name} #${card.number} (reverse) as collected`}
              />
              <span>Reverse{fmtGBP(getPrice('reverseHolofoil')) ? ` — ${fmtGBP(getPrice('reverseHolofoil'))}` : ''}</span>
            </label>
          )}
        </div>
      </div>
    </div>
  );
}