/**
 * Simplified Promo Priority Selection Test
 * 
 * Tests priority selection with existing Stripe coupons
 * Focuses on match level and priority logic
 */

const path = require('path');

// Load environment
const args = process.argv.slice(2);
let envFile = './environment.env';
for (let i = 0; i < args.length; i++) {
  if (args[i] === '--env' && args[i + 1]) {
    envFile = args[i + 1];
    i++;
  }
}

const envPath = path.resolve(process.cwd(), envFile);
require('dotenv').config({ path: envPath });

const axios = require('axios');
const assert = require('assert');
const { httpsAgent, sleep, requestWithRetry } = require('./test-helpers');

const BASE_URL = process.env.APP_URL || 'https://localhost:4200';
const API_URL = BASE_URL.replace('4200', '4100');

const ADMIN_USER = 'admin@agnav.com';
const ADMIN_PASSWORD = 'admin';

// Test customer account for invoice preview
const CUSTOMER_EMAIL = 'trungduyhoang@gmail.com';
const CUSTOMER_PASSWORD = 'secret';

// Use existing coupon from your setup
const EXISTING_COUPON = '50OFF';

// Use timestamp for unique promo names to avoid conflicts
const TEST_RUN_ID = Date.now();
const createdPromoIds = []; // Track promos we create for cleanup

let authToken = null;
let customerToken = null;
let customerId = null; // Stripe customer ID
async function login() {
  console.log('\n--- Login Admin ---');
  const response = await axios.post(`${API_URL}/api/users/login`, {
    username: ADMIN_USER,
    password: ADMIN_PASSWORD
  }, { httpsAgent });
  
  authToken = response.data.token;
  console.log('✅ Admin logged in');
}

async function loginCustomer() {
  console.log('\n--- Login Customer ---');
  const response = await axios.post(`${API_URL}/api/users/login`, {
    username: CUSTOMER_EMAIL,
    password: CUSTOMER_PASSWORD
  }, { httpsAgent });
  
  customerToken = response.data.token;
  customerId = response.data.membership?.custId;
  console.log('✅ Customer logged in');
  console.log(`   Stripe Customer ID: ${customerId}`);
  
  if (!customerId) {
    throw new Error('Customer does not have a Stripe customer ID. Please create subscription first.');
  }
}

/**
 * Cleanup only the promos we created in this test run
 */
async function cleanupCreatedPromos() {
  if (createdPromoIds.length === 0) {
    console.log('   No promos to clean up');
    return;
  }
  
  console.log(`   Cleaning up ${createdPromoIds.length} promos created in this run`);
  const yesterday = new Date(Date.now() - 24 * 60 * 60 * 1000).toISOString();
  
  for (const promoId of createdPromoIds) {
    try {
      await requestWithRetry('put', `${API_URL}/api/admin/subscriptionPromos/${promoId}`, 
        { validUntil: yesterday, enabled: false }, 
        { headers: { 'Authorization': `Bearer ${authToken}` }, httpsAgent }
      );
      console.log(`   ✓ Disabled promo ${promoId}`);
    } catch (error) {
      console.log(`   ⚠ Could not disable ${promoId}: ${error.message}`);
    }
    await sleep(100);
  }
}

/**
 * Create a new promo with unique name
 * @param {object} data - Promo data
 * @returns {Promise<object>} Created promo
 */
async function createPromo(data) {
  // Add unique run ID to name to avoid conflicts
  const uniqueData = {
    ...data,
    name: `${data.name}_${TEST_RUN_ID}`
  };
  
  const response = await requestWithRetry('post', `${API_URL}/api/admin/subscriptionPromos/add`, 
    uniqueData, 
    { headers: { 'Authorization': `Bearer ${authToken}` }, httpsAgent }
  );
  
  // Track created promo ID for cleanup
  const promos = response.data.promos || [];
  const createdPromo = promos.find(p => p.name === uniqueData.name);
  if (createdPromo) {
    createdPromoIds.push(createdPromo._id);
  }
  
  await sleep(100);
  return response.data;
}

async function testInvoicePreview(targetPackage = 'ess_2') {
  try {
    const response = await axios.post(`${API_URL}/api/subscription/retrieveNextInvoices`,
      { 
        custId: customerId,
        package: targetPackage  // Use ess_2 to simulate upgrade (customer has ess_1)
      },
      { headers: { 'Authorization': `Bearer ${customerToken}` }, httpsAgent }
    );
    
    console.log(`   DEBUG: Response length: ${response.data?.length}`);
    const invoice = response.data?.[0];
    console.log(`   DEBUG: Invoice discount:`, invoice?.discount);
    const discount = invoice?.discount;
    return discount ? { applied: true, coupon: discount.coupon?.id } : { applied: false };
  } catch (error) {
    console.error('   ❌ Invoice preview error:', error.response?.status, error.response?.statusText);
    console.error('   ', error.response?.data);
    throw error;
  }
}

/**
 * Test 1: Exact match beats catchall (both same priority)
 */
async function test1_ExactMatchWins() {
  console.log('\n' + '='.repeat(60));
  console.log('TEST 1: Exact Match Wins Over Catchall');
  console.log('='.repeat(60));
  

  // Catchall (priority 0)
  await createPromo({
    name: 'TEST_Catchall_P0',
    couponId: EXISTING_COUPON,
    priority: 0,
    eligibility: 'all',
    validUntil: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
  });
  console.log('   Created catchall (priority 0)');
  
  // Exact match (priority 0)
  await createPromo({
    name: 'TEST_Exact_P0',
    type: 'package',
    priceKey: 'ess_2',
    couponId: EXISTING_COUPON,
    priority: 0,
    eligibility: 'all',
    validUntil: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
  });
  console.log('   Created exact match (priority 0)');
  
  const result = await testInvoicePreview();
  
  assert(result.applied, 'Should apply promo');
  console.log(`   ✅ PASS: Promo applied (exact match selected)`);
}

/**
 * Test 2: Higher priority wins
 */
async function test2_HigherPriorityWins() {
  console.log('\n' + '='.repeat(60));
  console.log('TEST 2: Higher Priority Wins');
  console.log('='.repeat(60));
  
  // Low priority
  await createPromo({
    name: 'TEST_Low_P1',
    type: 'package',
    priceKey: 'ess_2',
    couponId: EXISTING_COUPON,
    priority: 1,
    eligibility: 'all',
    validUntil: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
  });
  console.log('   Created low priority (priority 1)');
  
  // High priority
  await createPromo({
    name: 'TEST_High_P10',
    type: 'package',
    priceKey: 'ess_2',
    couponId: EXISTING_COUPON,
    priority: 10,
    eligibility: 'all',
    validUntil: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
  });
  console.log('   Created high priority (priority 10)');
  
  const result = await testInvoicePreview();
  
  assert(result.applied, 'Should apply promo');
  console.log(`   ✅ PASS: Higher priority promo selected`);
}

/**
 * Test 3: Duration-based promo (no validUntil) is active
 */
async function test3_DurationBasedPromo() {
  console.log('\n' + '='.repeat(60));
  console.log('TEST 3: Duration-Based Promo (durationInMonths)');
  console.log('='.repeat(60));
  
  
  
  // Duration-based promo
  await createPromo({
    name: 'TEST_Duration_12M',
    type: 'package',
    priceKey: 'ess_2',
    couponId: EXISTING_COUPON,
    priority: 5,
    eligibility: 'all',
    durationInMonths: 12
    // Note: NO validUntil
  });
  console.log('   Created duration-based promo (12 months, no validUntil)');
  
  const result = await testInvoicePreview();
  
  assert(result.applied, 'Should apply promo');
  console.log(`   ✅ PASS: Duration-based promo active without validUntil`);
}

/**
 * Test 4: Exact match high priority beats catchall low priority
 */
async function test4_ExactHighBeatsCatchallLow() {
  console.log('\n' + '='.repeat(60));
  console.log('TEST 4: Exact Match (High) Beats Catchall (Low)');
  console.log('='.repeat(60));
  
  // Catchall low priority
  await createPromo({
    name: 'TEST_Catchall_P0_v2',
    couponId: EXISTING_COUPON,
    priority: 0,
    eligibility: 'all',
    validUntil: new Date(Date.now() + 7 * 24 * 60 * 60 * 1000).toISOString()
  });
  console.log('   Created catchall (priority 0)');
  
  // Exact match high priority
  await createPromo({
    name: 'TEST_Exact_P5',
    type: 'package',
    priceKey: 'ess_2',
    couponId: EXISTING_COUPON,
    priority: 5,
    eligibility: 'all',
    durationInMonths: 12
  });
  console.log('   Created exact match (priority 5, durationInMonths)');
  
  const result = await testInvoicePreview();
  
  assert(result.applied, 'Should apply promo');
  console.log(`   ✅ PASS: Exact match with higher priority selected`);
}

/**
 * Main
 */
async function runTests() {
  console.log('='.repeat(60));
  console.log('PROMO PRIORITY SELECTION TEST');
  console.log('='.repeat(60));
  console.log(`API: ${API_URL}`);
  console.log(`Coupon: ${EXISTING_COUPON}`);
  console.log(`Test Run ID: ${TEST_RUN_ID}`);
  
  try {
    await login();
    await loginCustomer();
    
    // Run all tests (unique names prevent conflicts)
    await test1_ExactMatchWins();
    await test2_HigherPriorityWins();
    await test3_DurationBasedPromo();
    await test4_ExactHighBeatsCatchallLow();
    
    // Cleanup only what we created
    console.log('\n' + '='.repeat(60));
    console.log('CLEANUP');
    console.log('='.repeat(60));
    await cleanupCreatedPromos();
    
    console.log('\n' + '='.repeat(60));
    console.log('✅ ALL TESTS PASSED (4/4)');
    console.log('='.repeat(60));
    
  } catch (error) {
    console.error('\n' + '='.repeat(60));
    console.error('❌ TEST FAILED');
    console.error('='.repeat(60));
    console.error(error.response?.data || error.message);
    
    // Try to clean up even on failure
    try {
      await cleanupCreatedPromos();
    } catch (cleanupError) {
      console.error('⚠️  Failed to clean up:', cleanupError.message);
    }
    
    process.exit(1);
  }
}

runTests();