import test from "node:test";
import assert from "node:assert/strict";
import fs from "node:fs";
import path from "node:path";

test("Docker Configuration: Dockerfile enforces Node runtime and excludes Nginx", () => {
  const dockerfilePath = path.resolve(process.cwd(), "Dockerfile");
  assert.ok(fs.existsSync(dockerfilePath), "Dockerfile must exist");

  const content = fs.readFileSync(dockerfilePath, "utf-8");

  // Must use Node 22 alpine
  assert.match(content, /FROM\s+node:22-alpine/i, "Dockerfile must use node:22-alpine base image");

  // Must NOT contain nginx base images or references
  assert.doesNotMatch(content, /FROM\s+nginx/i, "Dockerfile must not use nginx base image");
  assert.doesNotMatch(content, /nginx/i, "Dockerfile must not contain nginx directives");

  // Must build static site and serve with npm
  assert.match(content, /RUN\s+npm\s+run\s+build/, "Dockerfile must run npm build");
  assert.match(content, /ARG\s+PORT=8080/, "Dockerfile must define ARG PORT with default fallback");
  assert.match(content, /ENV\s+PORT=\$\{?PORT\}?/, "Dockerfile must define ENV PORT using variable");
  assert.match(content, /EXPOSE\s+\$\{?PORT\}?/, "Dockerfile must expose dynamic PORT variable");
  assert.match(content, /CMD\s*\[\s*["']npm["']\s*,\s*["']start["']\s*\]/, "Dockerfile must start via npm start");
});

test("Docker Configuration: docker-compose configures Node service correctly", () => {
  const composePath = fs.existsSync(path.resolve(process.cwd(), "sample-docker-compose.yml"))
    ? path.resolve(process.cwd(), "sample-docker-compose.yml")
    : path.resolve(process.cwd(), "docker-compose.yml");
  assert.ok(fs.existsSync(composePath), "Compose template file must exist");

  const content = fs.readFileSync(composePath, "utf-8");

  // Verifies dynamic port mapping and environment variables
  assert.match(content, /PORT:\s*"?\$\{PORT:-8080\}"?/, "docker-compose.yml must pass dynamic PORT build arg and env");
  assert.match(content, /:\$\{PORT:-8080\}/, "docker-compose.yml must map dynamic container PORT");

  // Verifies domain argument enforcement
  assert.match(content, /SITE_DOMAIN/, "docker-compose.yml must require SITE_DOMAIN");
});