import { ChangeDetectionStrategy, Component, EventEmitter, Input, Output, inject } from '@angular/core';
import { DecimalPipe } from '@angular/common';
import { RouterLink } from '@angular/router';
import { Product } from '../../core/products/models/product-domain.model';
import { LangRoutePipe } from '../../pipes/lang-route.pipe';
import { TranslatePipe } from '../../i18n/translate.pipe';
import { CurrencyConvertPipe } from '../../pipes/currency-convert.pipe';
import { LanguageService } from '../../services/language.service';
import { cleanDescription, getBadgeClass, getDiscountedPrice, getMainImage, onImageError } from '../../utils/item.utils';

const STOCK_LABEL_KEYS: Record<string, string> = {
  high: 'catalog.stockHigh',
  medium: 'catalog.stockMedium',
  low: 'catalog.stockLow',
  out: 'catalog.stockOut'
};

export type ProductCardAppearance = 'standard' | 'compact';

@Component({
  selector: 'app-product-card',
  standalone: true,
  imports: [DecimalPipe, RouterLink, LangRoutePipe, TranslatePipe, CurrencyConvertPipe],
  templateUrl: './product-card.component.html',
  styleUrls: ['./product-card.component.scss'],
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class ProductCardComponent {
  private readonly languageService = inject(LanguageService);
  readonly displayCurrency = this.languageService.currentCurrency;

  @Input({ required: true }) item!: Product;
  @Input() title = '';
  @Input() description = '';
  @Input() addToCartLabel = '';
  @Input() appearance: ProductCardAppearance = 'standard';
  @Input() showDescription = false;
  @Input() showStock = true;
  @Input() showRating = true;
  @Input() showDiscountBadge = true;
  @Input() showFavoritePlaceholder = false;
  @Input() showComparePlaceholder = false;
  @Input() showQuickViewPlaceholder = false;
  @Input() showFavoriteAction = false;
  @Input() showCompareAction = false;
  @Input() showShareAction = false;
  @Input() isFavorite = false;
  @Input() isCompared = false;

  @Output() addToCart = new EventEmitter<{ itemID: number; event: Event }>();
  @Output() preview = new EventEmitter<number>();
  @Output() selected = new EventEmitter<{ itemID: number; event: Event }>();
  @Output() favoritePlaceholder = new EventEmitter<number>();
  @Output() comparePlaceholder = new EventEmitter<number>();
  @Output() quickViewPlaceholder = new EventEmitter<number>();
  @Output() favoriteToggled = new EventEmitter<number>();
  @Output() compareToggled = new EventEmitter<number>();
  @Output() shareRequested = new EventEmitter<number>();

  readonly getMainImage = getMainImage;
  readonly getDiscountedPrice = getDiscountedPrice;
  readonly getBadgeClass = getBadgeClass;
  readonly cleanDescription = cleanDescription;
  readonly onImageError = onImageError;

  onAddToCart(event: Event): void {
    this.addToCart.emit({ itemID: this.item.itemID, event });
  }

  onSelected(event: Event): void {
    this.selected.emit({ itemID: this.item.itemID, event });
  }

  onFavoritePlaceholder(event: Event): void {
    event.preventDefault();
    event.stopPropagation();
    this.favoritePlaceholder.emit(this.item.itemID);
    this.favoriteToggled.emit(this.item.itemID);
  }

  onComparePlaceholder(event: Event): void {
    event.preventDefault();
    event.stopPropagation();
    this.comparePlaceholder.emit(this.item.itemID);
    this.compareToggled.emit(this.item.itemID);
  }

  onQuickViewPlaceholder(event: Event): void {
    event.preventDefault();
    event.stopPropagation();
    this.quickViewPlaceholder.emit(this.item.itemID);
  }

  onShare(event: Event): void {
    event.preventDefault();
    event.stopPropagation();
    this.shareRequested.emit(this.item.itemID);
  }

  stockLabelKey(remainings: string): string {
    return STOCK_LABEL_KEYS[remainings.toLowerCase()] ?? STOCK_LABEL_KEYS['high'];
  }

  showFavoriteControl(): boolean {
    return this.showFavoriteAction || this.showFavoritePlaceholder;
  }

  showCompareControl(): boolean {
    return this.showCompareAction || this.showComparePlaceholder;
  }
}