const assert = require('assert');
const http = require('http');
const mysql = require('mysql2/promise');
require('dotenv').config();

const BASE_URL = 'http://localhost:3001';

function request(method, path, body = null) {
  return new Promise((resolve, reject) => {
    const url = `${BASE_URL}${path}`;
    const options = {
      method: method,
      headers: {
        'Content-Type': 'application/json'
      }
    };
    const req = http.request(url, options, (res) => {
      let data = '';
      res.on('data', (chunk) => { data += chunk; });
      res.on('end', () => {
        try {
          const parsed = JSON.parse(data);
          resolve({ status: res.statusCode, body: parsed });
        } catch (e) {
          resolve({ status: res.statusCode, body: data });
        }
      });
    });
    req.on('error', (err) => reject(err));
    if (body) {
      req.write(JSON.stringify(body));
    }
    req.end();
  });
}

async function runTests() {
  console.log('🧪 Starting Audit TDD Tests...');
  const pool = mysql.createPool({
    host: process.env.DB_HOST,
    user: process.env.DB_USER,
    password: process.env.DB_PASS,
    database: process.env.DB_NAME,
    port: process.env.DB_PORT
  });

  const connection = await pool.getConnection();

  try {
    // Clean up any test records
    console.log('🧹 Cleaning up test records...');
    await connection.query("DELETE FROM asset_audit_pending WHERE asset_code LIKE 'TEST-ASSET-%'");
    
    // Check if test assets exist in asset_core & asset_location
    // We will use an existing asset or insert a dummy test asset
    const [testAssets] = await connection.query("SELECT id FROM asset_core WHERE asset_code = 'TEST-ASSET-001'");
    let testAssetId;
    if (testAssets.length === 0) {
      console.log('⏳ Inserting dummy test asset...');
      testAssetId = 'test_asset_uuid_123456';
      await connection.query(`
        INSERT INTO asset_core (id, asset_code, category, asset_type, asset_purpose)
        VALUES (?, 'TEST-ASSET-001', 'server', 'Server', 'TDD Test Server')
      `, [testAssetId]);
      await connection.query(`
        INSERT INTO asset_location (asset_id, location, location_detail, location_photo, loc_x, loc_y, is_active)
        VALUES (?, 'Initial Location', 'Initial Detail', 'initial.png', '10.00', '10.00', 1)
      `, [testAssetId]);
    } else {
      testAssetId = testAssets[0].id;
    }

    // 1. Test GET /api/physical-locations
    console.log('👉 Test 1: GET /api/physical-locations');
    const res1 = await request('GET', '/api/physical-locations');
    assert.strictEqual(res1.status, 200, 'GET /api/physical-locations should return 200');
    assert(Array.isArray(res1.body), 'Response should be an array of physical locations');
    assert(res1.body.length > 0, 'Should return at least one physical location');
    console.log(`✅ Test 1 Passed: Found ${res1.body.length} physical locations.`);

    const sampleLocation = res1.body[0].location_code;

    // 2. Test POST /api/audit/scan
    console.log(`👉 Test 2: POST /api/audit/scan (Location: ${sampleLocation}, Asset: TEST-ASSET-001)`);
    const res2 = await request('POST', '/api/audit/scan', {
      asset_code: 'TEST-ASSET-001',
      physical_location_code: sampleLocation
    });
    assert.strictEqual(res2.status, 200, 'POST /api/audit/scan should return 200');
    assert.strictEqual(res2.body.success, true, 'Response success should be true');
    assert(res2.body.pending_id, 'Response should contain pending_id');
    console.log(`✅ Test 2 Passed: Pending scan registered with ID: ${res2.body.pending_id}`);
    
    const pendingId = res2.body.pending_id;

    // 3. Test GET /api/audit/pending
    console.log('👉 Test 3: GET /api/audit/pending');
    const res3 = await request('GET', '/api/audit/pending');
    assert.strictEqual(res3.status, 200, 'GET /api/audit/pending should return 200');
    assert(Array.isArray(res3.body), 'Response should be an array');
    const pendingItem = res3.body.find(item => item.id === pendingId);
    assert(pendingItem, 'Pending list should contain the newly registered scan');
    assert.strictEqual(pendingItem.asset_code, 'TEST-ASSET-001', 'Asset code should match');
    assert.strictEqual(pendingItem.physical_location_code, sampleLocation, 'Location code should match');
    assert.strictEqual(pendingItem.status, 'PENDING', 'Status should be PENDING');
    console.log('✅ Test 3 Passed: Newly registered scan found in pending list with correct details.');

    // 4. Test POST /api/audit/approve
    console.log(`👉 Test 4: POST /api/audit/approve (Pending ID: ${pendingId})`);
    const res4 = await request('POST', '/api/audit/approve', {
      pending_ids: [pendingId],
      processed_by: 'TDD-TESTER'
    });
    assert.strictEqual(res4.status, 200, 'POST /api/audit/approve should return 200');
    assert.strictEqual(res4.body.success, true, 'Response success should be true');
    console.log('✅ Test 4 Passed: Audit approved.');

    // Verify database updates
    console.log('🔍 Verifying updates in database...');
    const [pendingCheck] = await connection.query(
      'SELECT status, processed_by FROM asset_audit_pending WHERE id = ?', 
      [pendingId]
    );
    assert.strictEqual(pendingCheck[0].status, 'APPROVED', 'Pending record status should be APPROVED');
    assert.strictEqual(pendingCheck[0].processed_by, 'TDD-TESTER', 'Processed by should match');

    const [locationCheck] = await connection.query(
      'SELECT physical_location_code, location_photo, loc_x, loc_y FROM asset_location WHERE asset_id = ? AND is_active = 1',
      [testAssetId]
    );
    const [physLoc] = await connection.query(
      'SELECT map_image, map_x, map_y FROM physical_locations WHERE location_code = ?',
      [sampleLocation]
    );
    assert.strictEqual(locationCheck[0].physical_location_code, sampleLocation, 'Asset location code should be updated');
    assert.strictEqual(locationCheck[0].location_photo, physLoc[0].map_image, 'Asset map_image should be updated');
    assert.strictEqual(parseFloat(locationCheck[0].loc_x).toFixed(2), parseFloat(physLoc[0].map_x).toFixed(2), 'Asset map_x should be updated');
    assert.strictEqual(parseFloat(locationCheck[0].loc_y).toFixed(2), parseFloat(physLoc[0].map_y).toFixed(2), 'Asset map_y should be updated');
    console.log('✅ Database verification passed: Asset location and map coordinates updated successfully!');

    // Clean up
    console.log('🧹 Cleaning up test assets...');
    await connection.query("DELETE FROM asset_audit_pending WHERE asset_code = 'TEST-ASSET-001'");
    await connection.query("DELETE FROM asset_location WHERE asset_id = ?", [testAssetId]);
    await connection.query("DELETE FROM asset_core WHERE id = ?", [testAssetId]);

    console.log('🎉 All TDD tests passed successfully!');
  } catch (err) {
    console.error('❌ TDD Test Suite Failed:', err.message);
    throw err;
  } finally {
    connection.release();
    await pool.end();
  }
}

runTests().catch(() => process.exit(1));