// app/routes/add-full-product.jsx

import { json } from "@remix-run/node";
import { useLoaderData, useActionData, Form } from "@remix-run/react";
import {
  Page,
  Layout,
  Card,
  TextField,
  Select,
  Button,
  Banner,
  InlineError,
  Text,
} from "@shopify/polaris";
import { useState, useEffect } from "react";
import { authenticate } from "../shopify.server";

export const loader = async ({ request }) => {
  const { admin } = await authenticate.admin(request);
  const resp = await admin.graphql(`
    {
      collections(first: 10, query: "collection_type:manual") {
        nodes { id title }
      }
    }
  `);
  const { data } = await resp.json();
  return json({ collections: data.collections.nodes });
};

export const action = async ({ request }) => {
  const form = await request.formData();
  const {
    title,
    descriptionHtml,
    vendor,
    productType,
    handle,
    tags,
    price,
    sku,
    costPerItem,      // new
    collectionId,
    imageUrl,
  } = Object.fromEntries(form);

  const { admin } = await authenticate.admin(request);

  // 1️⃣ Create product + attach image + join collection
  const createRes = await admin.graphql(
    `#graphql
    mutation CreateFullProduct($product: ProductCreateInput!, $media: [CreateMediaInput!]) {
      productCreate(product: $product, media: $media) {
        product {
          id
          variants(first: 1) {
            nodes {
              id
              inventoryItem { id }
            }
          }
        }
        userErrors { field message }
      }
    }`,
    {
      variables: {
        product: {
          title,
          descriptionHtml,
          vendor,
          productType,
          handle,
          tags: tags.split(",").map((t) => t.trim()),
          collectionsToJoin: [collectionId],
          status: "ACTIVE",
        },
        media: [
          {
            originalSource: imageUrl,
            mediaContentType: "IMAGE",
            alt: `${title} image`,
          },
        ],
      },
    }
  );
  const createJson = await createRes.json();
  if (createJson.data.productCreate.userErrors.length) {
    return json(
      { errors: createJson.data.productCreate.userErrors.map((e) => e.message) },
      { status: 400 }
    );
  }
  const newProduct = createJson.data.productCreate.product;
  const variantNode = newProduct.variants.nodes[0];
  const variantId = variantNode.id;
  const inventoryItemId = variantNode.inventoryItem.id;

  // 2️⃣ Set price via bulk update
  const priceRes = await admin.graphql(
    `#graphql
    mutation UpdatePrice($productId: ID!, $variants: [ProductVariantsBulkInput!]!) {
      productVariantsBulkUpdate(productId: $productId, variants: $variants) {
        productVariants { id price }
        userErrors { field message }
      }
    }`,
    {
      variables: {
        productId: newProduct.id,
        variants: [{ id: variantId, price: parseFloat(price) }],
      },
    }
  );
  const priceJson = await priceRes.json();
  if (priceJson.data.productVariantsBulkUpdate.userErrors.length) {
    return json(
      { errors: priceJson.data.productVariantsBulkUpdate.userErrors.map((e) => e.message) },
      { status: 400 }
    );
  }
  const updatedVariant = priceJson.data.productVariantsBulkUpdate.productVariants[0];

  // 3️⃣ Update inventory item: set SKU + cost per item
  const skuCostRes = await admin.graphql(
    `#graphql
    mutation SetSKUAndCost($id: ID!, $input: InventoryItemInput!) {
      inventoryItemUpdate(id: $id, input: $input) {
        inventoryItem { id sku }
        userErrors { field message }
      }
    }`,
    {
      variables: {
        id: inventoryItemId,
        input: {
          sku,
          cost: parseFloat(costPerItem), // unit cost in shop’s default currency :contentReference[oaicite:1]{index=1}
        },
      },
    }
  );
  const skuCostJson = await skuCostRes.json();
  if (skuCostJson.data.inventoryItemUpdate.userErrors.length) {
    return json(
      { errors: skuCostJson.data.inventoryItemUpdate.userErrors.map((e) => e.message) },
      { status: 400 }
    );
  }
  const finalSKU = skuCostJson.data.inventoryItemUpdate.inventoryItem.sku;

  return json({
    success: true,
    product: newProduct,
    variant: {
      id: updatedVariant.id,
      price: updatedVariant.price,
      sku: finalSKU,
    },
  });
};

export default function AddFullProductPage() {
  const { collections } = useLoaderData();
  const actionData = useActionData();

  // Controlled inputs
  const [title, setTitle] = useState("Dummy Test Product");
  const [descriptionHtml, setDescriptionHtml] = useState(
    "<p>This is a dummy product for testing.</p>"
  );
  const [vendor, setVendor] = useState("Test Vendor");
  const [productType, setProductType] = useState("Test Type");
  const [handle, setHandle] = useState("dummy-test-product");
  const [tags, setTags] = useState("test, dummy, sample");
  const [price, setPrice] = useState("9.99");
  const [costPerItem, setCostPerItem] = useState("5.00");  // new default
  const [sku, setSku] = useState("DUMMY-9");
  const [imageUrl, setImageUrl] = useState(
    "https://via.placeholder.com/300x300.png?text=Dummy+Image"
  );
  const [collectionId, setCollectionId] = useState(
    collections[0]?.id || ""
  );

  useEffect(() => {
    if (!collectionId && collections.length) {
      setCollectionId(collections[0].id);
    }
  }, [collections, collectionId]);

  return (
    <Page title="Add Full Product (Price + Cost)">
      <Layout>
        <Layout.Section>
          <Card sectioned>
            {actionData?.success && (
              <Banner title="✅ Product created!" status="success">
                <p>
                  {actionData.product.id} – Variant {actionData.variant.id} @ $
                  {actionData.variant.price} (SKU: {actionData.variant.sku})
                </p>
              </Banner>
            )}
            {actionData?.errors && (
              <Banner title="🚨 Errors" status="critical">
                <ul>
                  {actionData.errors.map((msg, i) => (
                    <li key={i}>
                      <InlineError message={msg} />
                    </li>
                  ))}
                </ul>
              </Banner>
            )}

            <Form method="post">
              <TextField
                label="Title"
                name="title"
                value={title}
                onChange={setTitle}
                required
              />
              <TextField
                label="Description (HTML)"
                name="descriptionHtml"
                multiline={4}
                value={descriptionHtml}
                onChange={setDescriptionHtml}
                required
              />
              <TextField
                label="Vendor"
                name="vendor"
                value={vendor}
                onChange={setVendor}
                required
              />
              <TextField
                label="Product Type"
                name="productType"
                value={productType}
                onChange={setProductType}
                required
              />
              <TextField
                label="Handle (URL suffix)"
                name="handle"
                value={handle}
                onChange={setHandle}
                required
              />
              <TextField
                label="Tags (comma-separated)"
                name="tags"
                value={tags}
                onChange={setTags}
              />
              <TextField
                type="number"
                step="0.01"
                label="Price (USD)"
                name="price"
                value={price}
                onChange={setPrice}
                required
              />
              <TextField
                type="number"
                step="0.01"
                label="Cost per Item"
                name="costPerItem"
                value={costPerItem}
                onChange={setCostPerItem}
                required
              />
              <TextField
                label="SKU"
                name="sku"
                value={sku}
                onChange={setSku}
                required
              />
              <TextField
                label="Image URL"
                name="imageUrl"
                value={imageUrl}
                onChange={setImageUrl}
              />
              <Select
                label="Add to Collection"
                name="collectionId"
                options={collections.map((c) => ({
                  label: c.title,
                  value: c.id,
                }))}
                value={collectionId}
                onChange={setCollectionId}
                required
              />
              <Button submit primary style={{ marginTop: "1rem" }}>
                Create Product
              </Button>
            </Form>
          </Card>
        </Layout.Section>
      </Layout>
    </Page>
  );
}