'use client'

import { useState } from 'react'
import type { CatalogItem } from '@/data/mock-catalog'
import ColorPicker from './ColorPicker'
import { fmt } from '@/lib/format'

interface Props {
  item: CatalogItem
}

function maxColorsFor(name: string): number | null {
  const n = name.toLowerCase()
  if (/arch|column/.test(n))                             return 4
  if (/\b11["''″]|\b11[- ]?inch/.test(n))               return 1
  if (/number.{0,10}sculpt|sculpt.{0,10}number/.test(n)) return 4
  if (/ultimate/.test(n))                                return 4
  return null
}

/** Lowest stock count across tracked variations. null = nothing tracked. */
function lowestTrackedInventory(item: CatalogItem): number | null {
  const tracked = item.variations.filter((v) => v.inventory !== null)
  if (!tracked.length) return null
  return Math.min(...tracked.map((v) => v.inventory as number))
}

const LOW_STOCK_THRESHOLD = 5

export default function ProductCard({ item }: Props) {
  const [showPicker, setShowPicker] = useState(false)
  // Prefer admin-set colorMax; fall back to name-based heuristic
  const maxColors = item.showColors
    ? (item.colorMax !== null && item.colorMax !== undefined ? item.colorMax : maxColorsFor(item.name))
    : null

  const stock    = lowestTrackedInventory(item)
  const soldOut  = stock !== null && stock <= 0
  const lowStock = stock !== null && stock > 0 && stock <= LOW_STOCK_THRESHOLD

  const priceDisplay = item.price ? `From ${fmt(item.price)}` : 'Custom quote'

  return (
    <>
      <div
        className="product-card"
        style={{ cursor: soldOut ? 'default' : 'pointer', opacity: soldOut ? 0.65 : 1 }}
        onClick={() => !soldOut && setShowPicker(true)}
      >
        {/* Image */}
        <div className="card-image" style={{ position: 'relative' }}>
          {item.imageUrl ? (
            // eslint-disable-next-line @next/next/no-img-element
            <img src={item.imageUrl} alt={item.name} />
          ) : (
            <div className="no-image">🎈</div>
          )}
          {item.featured && !soldOut && (
            <span style={{
              position: 'absolute', top: 10, left: 10,
              background: '#11b3be', color: '#fff',
              fontWeight: 700, fontSize: '0.72rem', letterSpacing: '0.05em',
              padding: '3px 10px', borderRadius: 4,
              textTransform: 'uppercase',
            }}>Featured</span>
          )}
          {soldOut && (
            <div style={{
              position: 'absolute', inset: 0,
              display: 'flex', alignItems: 'center', justifyContent: 'center',
              background: 'rgba(0,0,0,0.35)',
            }}>
              <span style={{
                background: '#c0392b', color: '#fff',
                fontWeight: 700, fontSize: '1rem', letterSpacing: '0.05em',
                padding: '6px 18px', borderRadius: 4,
                textTransform: 'uppercase',
              }}>Sold Out</span>
            </div>
          )}
        </div>

        {/* Content */}
        <div className="card-content">
          <p className="title is-5">{item.name}</p>
          <p className="subtitle is-6">{priceDisplay}</p>
          {lowStock && (
            <p style={{ fontSize: '0.78rem', color: '#c07000', fontWeight: 600, marginBottom: '0.35rem' }}>
              Only {stock} left
            </p>
          )}
          <p className="is-size-7">{item.description}</p>

          {item.tags.length > 0 && (
            <div className="card-tags">
              {item.tags.slice(0, 3).map((tag) => (
                <span key={tag} className="product-tag">{tag}</span>
              ))}
            </div>
          )}
        </div>

        {/* Footer CTA */}
        <footer className="card-footer" style={{ padding: '0.75rem' }}>
          <button
            className="button is-info is-fullwidth"
            style={{ fontWeight: 'bold', fontSize: '1rem' }}
            disabled={soldOut}
            onClick={(e) => { e.stopPropagation(); if (!soldOut) setShowPicker(true) }}
          >
            {soldOut ? 'Sold Out' : 'Customize & Order'}
          </button>
        </footer>
      </div>

      {showPicker && (
        <ColorPicker
          product={item}
          maxColors={maxColors}
          onClose={() => setShowPicker(false)}
        />
      )}
    </>
  )
}