'use strict';

const fs = require('fs');
const path = require('path');

const apiRoot = path.join(__dirname, '..');

describe('production version contract', () => {
  test('package semver is the source reported by the public version route', () => {
    const pkg = JSON.parse(fs.readFileSync(path.join(apiRoot, 'package.json'), 'utf8'));
    const app = fs.readFileSync(path.join(apiRoot, 'src', 'app.js'), 'utf8');
    expect(pkg.version).toMatch(/^\d+\.\d+\.\d+$/);
    // The version route is now extracted to routes/version.js and wired in.
    expect(app).toMatch(/require\(['"]\.\.\/routes\/version['"]\)/);
    expect(app).toMatch(/versionRoute\.buildRouter\(\)/);
  });

  test('production Docker image copies the manifest read by the route', () => {
    const dockerfile = fs.readFileSync(path.join(apiRoot, 'Dockerfile'), 'utf8');
    expect(dockerfile).toMatch(/^COPY package\.json \.\/$/m);
    expect(dockerfile).toMatch(/^RUN npm ci --omit=dev$/m);
    expect(dockerfile).not.toMatch(/^RUN npm install$/m);
    expect(dockerfile).toMatch(/^COPY src\/ \.\/src\/$/m);
  });

  test('routes/version.js exports the production route module', () => {
    const versionRoute = require('../routes/version');
    expect(typeof versionRoute.buildRouter).toBe('function');
    expect(versionRoute.getVersion()).toMatch(/^\d+\.\d+\.\d+$/);
  });
});