import { IShopifyMediaService } from "../interfaces/IShopifyMediaService"
import { IShop } from "../interfaces/IShop"
import { formatGqlForJSON, buildGqlQuery } from "../shopifyApi"

export class ShopifyMediaService implements IShopifyMediaService {
  private shop: IShop

  constructor(shop: IShop) {
    this.shop = shop
  }

  stagedUploadsCreate(input: any[]): any {
    const query = /* GraphQL */ `
      mutation stagedUploadsCreate($input: [StagedUploadInput!]!) {
        stagedUploadsCreate(input: $input) {
          stagedTargets {
            url
            resourceUrl
            parameters {
              name
              value
            }
          }
          userErrors {
            field
            message
          }
        }
      }
    `
    const variables = { input }
    const payload = buildGqlQuery(query, variables)
    const response = this.shop.shopifyGraphQLAPI(payload)
    return response.content.data.stagedUploadsCreate
  }

  productCreateMedia(productId: string, media: any[]): any {
    const query = /* GraphQL */ `
      mutation productCreateMedia($media: [CreateMediaInput!]!, $productId: ID!) {
        productCreateMedia(media: $media, productId: $productId) {
          media {
            id
            alt
            mediaContentType
            status
          }
          mediaUserErrors {
            field
            message
          }
          product {
            id
            title
          }
        }
      }
    `
    const variables = {
      productId,
      media
    }
    const payload = buildGqlQuery(query, variables)
    const response = this.shop.shopifyGraphQLAPI(payload)
    return response.content.data.productCreateMedia
  }
  getProductMedia(productId: string): any[] {
    const query = /* GraphQL */ `
      query getProductMedia($productId: ID!) {
        product(id: $productId) {
          media(first: 250) {
            edges {
              node {
                id
                alt
                mediaContentType
                status
                preview {
                  image {
                    originalSrc
                  }
                }
                ... on Video {
                  sources {
                    url
                    mimeType
                  }
                }
                ... on MediaImage {
                  image {
                    url
                  }
                }
              }
            }
          }
        }
      }
    `
    const variables = { productId }
    const payload = buildGqlQuery(query, variables)
    const response = this.shop.shopifyGraphQLAPI(payload)
    if (!response || !response.content || !response.content.data || !response.content.data.product) {
       console.error("getProductMedia: Invalid response or product not found. Raw Response:", JSON.stringify(response));
       throw new Error(`Product not found or access denied for ID: ${productId}. See Logs for details.`);
    }
    return response.content.data.product.media.edges.map((edge: any) => edge.node)
  }

  productDeleteMedia(productId: string, mediaId: string): any {
    const query = /* GraphQL */ `
      mutation productDeleteMedia($mediaIds: [ID!]!, $productId: ID!) {
        productDeleteMedia(mediaIds: $mediaIds, productId: $productId) {
          deletedMediaIds
          mediaUserErrors {
            field
            message
          }
        }
      }
    `
    const variables = { productId, mediaIds: [mediaId] }
    const payload = buildGqlQuery(query, variables)
    const response = this.shop.shopifyGraphQLAPI(payload)
    if (!response || !response.content || !response.content.data) {
        console.error("productDeleteMedia failed. Response:", JSON.stringify(response))
        if (response && response.content && response.content.errors) {
            console.error("GraphQL Errors:", JSON.stringify(response.content.errors))
        }
        throw new Error(`Shopify API failed for productDeleteMedia: ${response ? 'Invalid Response' : 'No Response'}`)
    }
    return response.content.data.productDeleteMedia
  }

  productReorderMedia(productId: string, moves: any[]): any {
    const query = /* GraphQL */ `
      mutation productReorderMedia($id: ID!, $moves: [MoveInput!]!) {
        productReorderMedia(id: $id, moves: $moves) {
          job {
            id
            done
          }
          userErrors {
            field
            message
          }
        }
      }
    `
    const variables = { id: productId, moves }
    const payload = buildGqlQuery(query, variables)
    const response = this.shop.shopifyGraphQLAPI(payload)
    return response.content.data.productReorderMedia
    return response.content.data.productReorderMedia
  }

  getShopDomain(): string {
    return this.shop.getShopDomain()
  }
}