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

async function readBody(page) {
  return await page.locator('body').innerText().catch(() => '');
}

async function expectNoBackendError(page) {
  const body = await readBody(page);
  expect(page.url()).not.toContain('500');
  expect(body).not.toMatch(/Internal Server Error|Traceback|Exception in ASGI application|UndefinedError|AttributeError|OperationalError|ProgrammingError/i);
}

async function extractCsrfFromPage(page) {
  const token = await page.locator('input[name="csrf_token"]').first().getAttribute('value').catch(() => null);
  return token || '';
}

async function blockedOrNotFound(response, text = '') {
  const status = response ? response.status() : 0;
  const safeStatus = [400,401,403,404,405,409,422,429].includes(status);
  const safeText = /login|required|forbidden|unauthorized|not found|access denied|permission|invalid|csrf|locked|closed/i.test(text || '');
  expect(safeStatus || safeText).toBeTruthy();
}

async function switchFinancialYearIfPossible(page, yearCode) {
  if (!yearCode) return false;

  const selectors = [
    'select[name="active_financial_year"]',
    'select[name="financial_year"]',
    'select[name="year_code"]',
    '[data-testid="active-fy-select"]',
    '[data-testid="financial-year-select"]'
  ];

  for (const sel of selectors) {
    if (page.isClosed()) return false;
    const loc = page.locator(sel).first();
    let found = 0;
    try {
      found = await loc.count();
    } catch (_) {
      if (page.isClosed()) return false;
      found = 0;
    }
    if (found) {
      try {
        await loc.selectOption({ value: yearCode });
      } catch (_) {
        try { await loc.selectOption({ label: yearCode }); } catch (__) { continue; }
      }
      const formSubmit = loc.locator('xpath=ancestor::form[1]//button[@type="submit" or not(@type)]').first();
      if (await formSubmit.count()) await formSubmit.click().catch(() => {});
      else await loc.press('Enter').catch(() => {});
      await page.waitForLoadState('domcontentloaded').catch(() => {});
      return true;
    }
  }

  const link = page.getByRole('link', { name: new RegExp(yearCode.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'), 'i') }).first();
  if (await link.count()) {
    await link.click().catch(() => {});
    await page.waitForLoadState('domcontentloaded').catch(() => {});
    return true;
  }

  return false;
}

function uploadPath(fileName) {
  return path.resolve(__dirname, '..', 'test-data', 'uploads', fileName);
}

module.exports = {
  readBody,
  expectNoBackendError,
  extractCsrfFromPage,
  blockedOrNotFound,
  switchFinancialYearIfPossible,
  uploadPath,
};