import { saleorClient } from "./client";
import { GET_PRODUCTS, GET_PRODUCT_BY_SLUG } from "./queries/Products";
import type { Product, ProductList } from "@/types/saleor";

const CHANNEL = process.env.NEXT_PUBLIC_SALEOR_CHANNEL || "default-channel";

export async function getProducts(
  locale: string = "SR",
  first: number = 100
): Promise<Product[]> {
  try {
    const { data } = await saleorClient.query({
      query: GET_PRODUCTS,
      variables: {
        channel: CHANNEL,
        locale: locale.toUpperCase(),
        first,
      },
    });

    return data?.products?.edges.map((edge: { node: Product }) => edge.node) || [];
  } catch (error) {
    console.error("Error fetching products from Saleor:", error);
    return [];
  }
}

export async function getProductBySlug(
  slug: string,
  locale: string = "SR"
): Promise<Product | null> {
  try {
    const { data } = await saleorClient.query({
      query: GET_PRODUCT_BY_SLUG,
      variables: {
        slug,
        channel: CHANNEL,
        locale: locale.toUpperCase(),
      },
    });

    return data?.product || null;
  } catch (error) {
    console.error(`Error fetching product ${slug} from Saleor:`, error);
    return null;
  }
}

export function getProductPrice(product: Product): string {
  const variant = product.variants?.[0];
  if (!variant?.pricing?.price?.gross?.amount) {
    return "";
  }
  return formatPrice(
    variant.pricing.price.gross.amount,
    variant.pricing.price.gross.currency
  );
}

export function getProductImage(product: Product): string {
  if (product.media && product.media.length > 0) {
    return product.media[0].url;
  }
  if (product.variants?.[0]?.media && product.variants[0].media.length > 0) {
    return product.variants[0].media[0].url;
  }
  return "/placeholder-product.jpg";
}

export function isProductAvailable(product: Product): boolean {
  const variant = product.variants?.[0];
  if (!variant) return false;
  return (variant.quantityAvailable || 0) > 0;
}

export function formatPrice(amount: number, currency: string = "RSD"): string {
  return new Intl.NumberFormat("sr-RS", {
    style: "currency",
    currency: currency,
    minimumFractionDigits: 0,
  }).format(amount);
}

// Parse Saleor's JSON description format (EditorJS) to plain text/HTML
export function parseDescription(description: string | null | undefined): string {
  if (!description) return "";
  
  // If it's already plain text (not JSON), return as-is
  if (!description.startsWith("{")) {
    return description;
  }
  
  try {
    const parsed = JSON.parse(description);
    
    // Handle EditorJS format: { blocks: [{ data: { text: "..." } }] }
    if (parsed.blocks && Array.isArray(parsed.blocks)) {
      return parsed.blocks
        .map((block: any) => {
          if (block.data?.text) {
            return block.data.text;
          }
          return "";
        })
        .filter(Boolean)
        .join("\n\n");
    }
    
    // Fallback: return stringified if unknown format
    return description;
  } catch (e) {
    // If JSON parse fails, return original
    return description;
  }
}

// Get localized product data
export function getLocalizedProduct(
  product: Product,
  locale: string = "SR"
): {
  name: string;
  slug: string;
  description: string;
  seoTitle?: string;
  seoDescription?: string;
} {
  const isEnglish = locale.toLowerCase() === "en";
  const translation = isEnglish ? product.translation : null;
  
  const rawDescription = translation?.description || product.description;

  return {
    name: translation?.name || product.name,
    slug: translation?.slug || product.slug,
    description: parseDescription(rawDescription),
    seoTitle: translation?.seoTitle || product.seoTitle,
    seoDescription: translation?.seoDescription || product.seoDescription,
  };
}