const { test, expect } = require('@playwright/test');
const fs = require('fs');
const path = require('path');

function loadFixture(fixture) {
  const fixturePath = path.resolve(__dirname, `../fixtures/${fixture}`);
  return  JSON.parse(fs.readFileSync(fixturePath, 'utf-8'));
}

async function runWorker(page, input) {
  return await page.evaluate((input) => {
    return new Promise((resolve, reject) => {
      const worker = new Worker('worker.js');
      worker.postMessage(JSON.stringify(input));

      worker.onmessage = (event) => {
        resolve(event.data.output);
        worker.terminate();
      };

      worker.onerror = (error) => {
        reject(error.message || error);
        worker.terminate();
      };
    });
  }, input);
}

test('should successfully compile valid Solidity code in browser', async ({ page }) => {
  await page.goto("http://127.0.0.1:8080");
  await page.setContent("");
  const standardInput = loadFixture('storage.json')
  const result = await runWorker(page, standardInput);
  
  expect(typeof result).toBe('string');
  let output = JSON.parse(result);
  expect(output).toHaveProperty('contracts');
  expect(output.contracts['fixtures/storage.sol']).toHaveProperty('Storage');
  expect(output.contracts['fixtures/storage.sol'].Storage).toHaveProperty('abi');
  expect(output.contracts['fixtures/storage.sol'].Storage).toHaveProperty('evm');
  expect(output.contracts['fixtures/storage.sol'].Storage.evm).toHaveProperty('bytecode');
});

test('should successfully compile large valid Solidity code in browser', async ({ page }) => {
  await page.goto("http://127.0.0.1:8080");
  await page.setContent("");
  const standardInput = loadFixture('token.json')
  const result = await runWorker(page, standardInput);
  
  expect(typeof result).toBe('string');
  let output = JSON.parse(result);
  expect(output).toHaveProperty('contracts');
  expect(output.contracts['fixtures/token.sol']).toHaveProperty('MyToken');
  expect(output.contracts['fixtures/token.sol'].MyToken).toHaveProperty('abi');
  expect(output.contracts['fixtures/token.sol'].MyToken).toHaveProperty('evm');
  expect(output.contracts['fixtures/token.sol'].MyToken.evm).toHaveProperty('bytecode');
});

test('should throw an error for invalid Solidity code in browser', async ({ page }) => {
  await page.goto("http://127.0.0.1:8080");
  await page.setContent("");
  const standardInput = loadFixture('invalid_contract_content.json')
  const result = await runWorker(page, standardInput);

  expect(typeof result).toBe('string');
  let output = JSON.parse(result);
  expect(output).toHaveProperty('errors');
  expect(Array.isArray(output.errors)).toBeTruthy(); // Check if it's an array
  expect(output.errors.length).toBeGreaterThan(0);
  expect(output.errors[0]).toHaveProperty('type');
  expect(output.errors[0].type).toContain('ParserError');
});

test('should return not found error for missing imports in browser', async ({page}) => {
  await page.goto("http://127.0.0.1:8080");
  await page.setContent("");
  const standardInput = loadFixture('missing_import.json')
  const result = await runWorker(page, standardInput);
    
  expect(typeof result).toBe('string');
  let output = JSON.parse(result);
  expect(output).toHaveProperty('errors');
  expect(Array.isArray(output.errors)).toBeTruthy(); // Check if it's an array
  expect(output.errors.length).toBeGreaterThan(0);
  expect(output.errors[0]).toHaveProperty('message');
  expect(output.errors[0].message).toContain('Source "nonexistent/console.sol" not found');
});