#!/usr/bin/env node
/**
 * Complete API test simulating frontend checkout flow
 * Tests every step the frontend takes
 */

const SALEOR_API_URL = 'https://api.manoonoils.com/graphql/';

async function saleorFetch(query, variables = {}) {
  const response = await fetch(SALEOR_API_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ query: query.replace(/\n\s*/g, ' '), variables }),
  });
  const result = await response.json();
  if (result.errors) {
    console.error('GraphQL Error:', JSON.stringify(result.errors, null, 2));
    throw new Error(result.errors[0].message);
  }
  return result.data;
}

async function runTest() {
  console.log('🧪 TESTING FRONTEND CHECKOUT FLOW\n');
  console.log('=' .repeat(50));
  
  let checkoutId = null;
  let checkoutToken = null;
  let shippingMethodId = null;

  try {
    // STEP 1: Create checkout (like frontend does on first cart add)
    console.log('\n📦 STEP 1: Create Checkout');
    console.log('-'.repeat(50));
    
    const createResult = await saleorFetch(`
      mutation CheckoutCreate($input: CheckoutCreateInput!) {
        checkoutCreate(input: $input) {
          checkout {
            id
            token
            totalPrice { gross { amount currency } }
            subtotalPrice { gross { amount } }
          }
          errors { field message }
        }
      }
    `, {
      input: {
        channel: "default-channel",
        email: "test@test.com",
        lines: [],
        languageCode: "SR"
      }
    });
    
    checkoutId = createResult.checkoutCreate.checkout.id;
    checkoutToken = createResult.checkoutCreate.checkout.token;
    
    console.log('✅ Checkout created');
    console.log('   ID:', checkoutId);
    console.log('   Token:', checkoutToken);
    console.log('   Initial Total:', createResult.checkoutCreate.checkout.totalPrice.gross.amount, 'RSD');
    
    // STEP 2: Add product (like frontend does)
    console.log('\n🛒 STEP 2: Add Product to Cart');
    console.log('-'.repeat(50));
    
    // Get a valid variant first
    const productsResult = await saleorFetch(`
      query {
        products(channel: "default-channel", first: 1) {
          edges {
            node {
              variants { id name }
            }
          }
        }
      }
    `);
    
    const variantId = productsResult.products.edges[0].node.variants[0].id;
    
    const addLineResult = await saleorFetch(`
      mutation CheckoutLinesAdd($checkoutId: ID!, $lines: [CheckoutLineInput!]!) {
        checkoutLinesAdd(checkoutId: $checkoutId, lines: $lines) {
          checkout {
            id
            token
            totalPrice { gross { amount currency } }
            subtotalPrice { gross { amount } }
          }
          errors { field message }
        }
      }
    `, {
      checkoutId: checkoutId,
      lines: [{ variantId: variantId, quantity: 1 }]
    });
    
    const afterAdd = addLineResult.checkoutLinesAdd.checkout;
    console.log('✅ Product added');
    console.log('   Product Total:', afterAdd.totalPrice.gross.amount, 'RSD');
    console.log('   Subtotal:', afterAdd.subtotalPrice.gross.amount, 'RSD');
    
    // STEP 3: Refresh checkout by token (what refreshCheckout() does)
    console.log('\n🔄 STEP 3: Refresh Checkout by Token');
    console.log('-'.repeat(50));
    console.log('   (This simulates what refreshCheckout() does in the store)');
    
    const refreshResult = await saleorFetch(`
      query GetCheckout($token: UUID!) {
        checkout(token: $token) {
          id
          token
          totalPrice { gross { amount currency } }
          subtotalPrice { gross { amount } }
        }
      }
    `, { token: checkoutToken });
    
    console.log('✅ Refreshed checkout');
    console.log('   Total from refresh:', refreshResult.checkout.totalPrice.gross.amount, 'RSD');
    
    // STEP 4: Set shipping address
    console.log('\n📍 STEP 4: Set Shipping Address');
    console.log('-'.repeat(50));
    
    const addressResult = await saleorFetch(`
      mutation CheckoutShippingAddressUpdate($checkoutId: ID!, $shippingAddress: AddressInput!) {
        checkoutShippingAddressUpdate(checkoutId: $checkoutId, shippingAddress: $shippingAddress) {
          checkout {
            id
            shippingMethods { id name price { amount currency } }
          }
          errors { field message }
        }
      }
    `, {
      checkoutId: checkoutId,
      shippingAddress: {
        firstName: "Test",
        lastName: "User",
        streetAddress1: "123 Test Street",
        city: "Belgrade",
        postalCode: "11000",
        country: "RS",
        phone: "+38160123456"
      }
    });
    
    const methods = addressResult.checkoutShippingAddressUpdate.checkout.shippingMethods;
    console.log('✅ Address set');
    console.log('   Available shipping methods:', methods.length);
    
    if (methods.length === 0) {
      console.log('❌ No shipping methods available!');
      return;
    }
    
    methods.forEach((m, i) => {
      console.log(`   [${i+1}] ${m.name}: ${m.price.amount} ${m.price.currency}`);
    });
    
    shippingMethodId = methods[0].id;
    const shippingPrice = methods[0].price.amount;
    
    // STEP 5: Select shipping method (what happens when user clicks radio button)
    console.log('\n🚚 STEP 5: Select Shipping Method');
    console.log('-'.repeat(50));
    console.log(`   Selecting: ${methods[0].name} (${shippingPrice} RSD)`);
    
    const methodResult = await saleorFetch(`
      mutation CheckoutShippingMethodUpdate($checkoutId: ID!, $shippingMethodId: ID!) {
        checkoutShippingMethodUpdate(checkoutId: $checkoutId, shippingMethodId: $shippingMethodId) {
          checkout {
            id
            totalPrice { gross { amount currency } }
            subtotalPrice { gross { amount } }
            shippingPrice { gross { amount } }
          }
          errors { field message }
        }
      }
    `, {
      checkoutId: checkoutId,
      shippingMethodId: shippingMethodId
    });
    
    const afterMethod = methodResult.checkoutShippingMethodUpdate.checkout;
    console.log('✅ Shipping method set');
    console.log('   Total:', afterMethod.totalPrice.gross.amount, 'RSD');
    console.log('   Subtotal:', afterMethod.subtotalPrice.gross.amount, 'RSD');
    console.log('   Shipping:', afterMethod.shippingPrice.gross.amount, 'RSD');
    
    // STEP 6: Refresh checkout again (what refreshCheckout() does after setting method)
    console.log('\n🔄 STEP 6: Refresh Checkout Again');
    console.log('-'.repeat(50));
    console.log('   (Simulating refreshCheckout() call in handleShippingMethodSelect)');
    
    const finalRefresh = await saleorFetch(`
      query GetCheckout($token: UUID!) {
        checkout(token: $token) {
          id
          token
          totalPrice { gross { amount currency } }
          subtotalPrice { gross { amount } }
          shippingPrice { gross { amount } }
        }
      }
    `, { token: checkoutToken });
    
    const final = finalRefresh.checkout;
    console.log('✅ Final checkout state after refresh:');
    console.log('   Total:', final.totalPrice.gross.amount, 'RSD');
    console.log('   Subtotal:', final.subtotalPrice.gross.amount, 'RSD');
    console.log('   Shipping:', final.shippingPrice.gross.amount, 'RSD');
    
    // VERIFICATION
    console.log('\n📊 VERIFICATION');
    console.log('=' .repeat(50));
    const expectedTotal = final.subtotalPrice.gross.amount + final.shippingPrice.gross.amount;
    const actualTotal = final.totalPrice.gross.amount;
    
    if (actualTotal === expectedTotal) {
      console.log('✅ PASS: API returns correct total with shipping');
      console.log(`   ${final.subtotalPrice.gross.amount} + ${final.shippingPrice.gross.amount} = ${actualTotal}`);
    } else {
      console.log('❌ FAIL: API total does not include shipping');
      console.log(`   Expected: ${expectedTotal}, Got: ${actualTotal}`);
    }
    
    console.log('\n🔍 FRONTEND ISSUE ANALYSIS');
    console.log('=' .repeat(50));
    console.log('The API works correctly. The bug is in the frontend.');
    console.log('');
    console.log('What should happen:');
    console.log('  1. User selects shipping method → handleShippingMethodSelect()');
    console.log('  2. Calls checkoutService.updateShippingMethod() → API updates');
    console.log('  3. Calls refreshCheckout() → store updates with new checkout');
    console.log('  4. Component re-renders with new checkout.totalPrice');
    console.log('');
    console.log('Check browser console for:');
    console.log('  - [Checkout Debug] logs showing totalPrice values');
    console.log('  - Network tab showing the GraphQL mutation/refresh calls');
    console.log('  - React DevTools showing if checkout object updates');
    
  } catch (error) {
    console.error('\n❌ Test failed:', error.message);
    process.exit(1);
  }
}

runTest();