/**
 * config_validation.test.mjs — Validate build configuration integrity.
 *
 * Prevents regressions like the phantom entry module issue that kfj001
 * hit: vite.config.ts referenced probeFn.js and scrapeFn.js but those
 * files were never created.
 */
import { describe, it } from './runner.mjs';
import { readFileSync, existsSync } from 'fs';
import { resolve, dirname } from 'path';
import { fileURLToPath } from 'url';

const __dirname = dirname(fileURLToPath(import.meta.url));
const root = resolve(__dirname, '..');

describe('Config: build integrity', () => {
  it('vite.config.ts entry modules must exist as source files', () => {
    const viteConfig = readFileSync(resolve(root, 'vite.config.ts'), 'utf8');

    const matches = viteConfig.matchAll(/resolve\(__dirname,\s*'([^']+)'\)/g);
    const inputEntries = [...matches]
      .map(m => m[1])
      .filter(p => p.startsWith('src/'));

    const missing = inputEntries.filter(p => !existsSync(resolve(root, p)));

    if (missing.length > 0) {
      throw new Error(
        `vite.config.ts references ${missing.length} missing file(s): ${missing.join(', ')}`
      );
    }
    if (inputEntries.length === 0) {
      throw new Error('No entry points found in vite.config.ts');
    }
  });

  it('content.js must NOT use inline script injection (textContent)', () => {
    const contentJs = readFileSync(resolve(root, 'src/content/content.js'), 'utf8');

    // Strip comments before checking for textContent usage
    const codeOnly = contentJs
      .replace(/\/\*[\s\S]*?\*\//g, '')  // block comments
      .replace(/\/\/.*$/gm, '');         // line comments

    if (codeOnly.includes('textContent')) {
      throw new Error(
          'content.js uses inline script injection (textContent). ' +
          'Some sites block inline scripts via CSP. Use script.src instead.'
      );
    }
    if (!codeOnly.includes('script.src') || !codeOnly.includes('chrome.runtime.getURL')) {
      throw new Error(
        'content.js does not use CSP-safe script.src = chrome.runtime.getURL(...)'
      );
    }
  });

  it('interceptors.js must be a standalone file', () => {
    const path = resolve(root, 'src/inject/interceptors.js');
    if (!existsSync(path)) {
      throw new Error('src/inject/interceptors.js does not exist');
    }
    const content = readFileSync(path, 'utf8');
    if (!content.includes('(function ()') || !content.includes('})();')) {
      throw new Error('interceptors.js should be a self-contained IIFE');
    }
  });

  it('manifest.json content_scripts must reference content.js', () => {
    const manifest = JSON.parse(
      readFileSync(resolve(root, 'manifest.json'), 'utf8')
    );
    const cs = manifest.content_scripts;
    if (!cs || !Array.isArray(cs)) {
      throw new Error('manifest.json has no content_scripts');
    }
    const hasContentScript = cs.some(s => s.js && s.js.includes('content.js'));
    if (!hasContentScript) {
      throw new Error('No content_scripts entry references content.js');
    }
  });

  it('manifest.json must declare interceptors.js in web_accessible_resources', () => {
    const manifest = JSON.parse(
      readFileSync(resolve(root, 'manifest.json'), 'utf8')
    );
    const war = manifest.web_accessible_resources;
    if (!war || !Array.isArray(war)) {
      throw new Error(
        'manifest.json has no web_accessible_resources. ' +
        'interceptors.js needs this for chrome.runtime.getURL() to work.'
      );
    }
    const allResources = war.flatMap(entry => entry.resources || []);
    if (!allResources.includes('interceptors.js')) {
      throw new Error(
        'manifest.json web_accessible_resources must include interceptors.js. ' +
        'Without it, the browser blocks chrome.runtime.getURL("interceptors.js").'
      );
    }
  });
});