import test from 'node:test';
import assert from 'node:assert/strict';
import { readFile } from 'node:fs/promises';
import { spawnSync } from 'node:child_process';

const dockerfilePath = new URL('../deploy/worker/Dockerfile', import.meta.url);
const receiptsPath = new URL('../deploy/worker/receipts.json', import.meta.url);
const buildScriptPath = new URL('../deploy/worker/build_image.sh', import.meta.url);
const runScriptPath = new URL('../deploy/worker/run_worker_container.sh', import.meta.url);
const dockerignorePath = new URL('../.dockerignore', import.meta.url);
const bootstrapPath = new URL('../scripts/bootstrap_selfhost_smolvlm.sh', import.meta.url);

async function recipe() {
  const [dockerfile, receipts, buildScript, runScript, dockerignore, bootstrap] = await Promise.all([
    readFile(dockerfilePath, 'utf8'),
    readFile(receiptsPath, 'utf8').then(JSON.parse),
    readFile(buildScriptPath, 'utf8'),
    readFile(runScriptPath, 'utf8'),
    readFile(dockerignorePath, 'utf8'),
    readFile(bootstrapPath, 'utf8'),
  ]);
  return { dockerfile, receipts, buildScript, runScript, dockerignore, bootstrap };
}

function bootstrapDefault(script, name) {
  const match = new RegExp(`^${name}="\\$\\{[A-Z0-9_]*:-([^}]+)\\}"$`, 'm').exec(script);
  assert.ok(match, `bootstrap script must declare a default for ${name}`);
  return match[1];
}

test('the worker image pins llama.cpp and both model hashes to the bootstrap receipts', async () => {
  const { dockerfile, receipts, bootstrap } = await recipe();
  const commit = bootstrapDefault(bootstrap, 'LLAMA_CPP_COMMIT');
  const modelSha = bootstrapDefault(bootstrap, 'MODEL_SHA256');
  const mmprojSha = bootstrapDefault(bootstrap, 'MMPROJ_SHA256');

  // Receipts are the runtime/CI source of truth and must not drift from the host bootstrap.
  assert.equal(receipts.llamaCpp.commit, commit);
  assert.equal(receipts.llamaCpp.repository, 'https://github.com/ggml-org/llama.cpp');
  assert.deepEqual(receipts.models.map(model => model.sha256), [modelSha, mmprojSha]);
  assert.deepEqual(receipts.models.map(model => model.file), [
    'SmolVLM2-2.2B-Instruct-Q4_K_M.gguf',
    'mmproj-SmolVLM2-2.2B-Instruct-Q8_0.gguf',
  ]);
  assert.match(receipts.llamaCpp.commit, /^[0-9a-f]{40}$/);
  for (const model of receipts.models) assert.match(model.sha256, /^[0-9a-f]{64}$/);

  // The image builds the same pinned revision: the build args default to the receipts.
  assert.match(dockerfile, new RegExp(`^ARG LLAMA_CPP_COMMIT=${commit}$`, 'm'));
  assert.match(dockerfile, new RegExp(`^ARG MODEL_SHA256=${modelSha}$`, 'm'));
  assert.match(dockerfile, new RegExp(`^ARG MMPROJ_SHA256=${mmprojSha}$`, 'm'));
  assert.match(dockerfile, /git fetch --depth 1 origin "\$\{LLAMA_CPP_COMMIT\}"/);
  assert.match(dockerfile, /git checkout --detach FETCH_HEAD/);
});

test('the worker image uses digest-pinned bases and refuses floating model sources', async () => {
  const { dockerfile, receipts } = await recipe();

  const froms = dockerfile.split('\n').filter(line => line.startsWith('FROM '));
  assert.equal(froms.length, 2, 'the recipe is a build stage and a runtime stage');
  for (const line of froms) assert.match(line, /@sha256:[0-9a-f]{64}/, `base must be digest-pinned: ${line}`);
  // The recorded receipts and the recipe must name the same immutable bases.
  const digests = froms.map(line => /@(sha256:[0-9a-f]{64})/.exec(line)[1]);
  assert.deepEqual(digests, [receipts.baseImages.build.digest, receipts.baseImages.runtime.digest]);
  assert.equal(receipts.baseImages.build.reference, 'nvidia/cuda:12.4.1-devel-ubuntu22.04');
  assert.equal(receipts.baseImages.runtime.reference, 'nvidia/cuda:12.4.1-runtime-ubuntu22.04');
  assert.doesNotMatch(dockerfile, /:latest|ggml-org\/llama\.cpp@?main|refs\/heads\/(?:main|master)/);
  // Weights are never baked in; the model arrives as a read-only mount.
  assert.doesNotMatch(dockerfile, /^COPY .*\.gguf/m);
  assert.doesNotMatch(dockerfile, /^ADD /m);
  assert.match(dockerfile, /\/models/);
});

test('the worker image runs unprivileged with no default credentials and a post-load healthcheck', async () => {
  const { dockerfile } = await recipe();
  // Directives may be wrapped with a line continuation; assert on the joined directive text.
  const directives = dockerfile.replace(/\\\n\s*/g, ' ');

  const user = /^USER (?!root)(\S+)$/m.exec(dockerfile);
  assert.ok(user, 'the runtime stage must drop to an unprivileged user');
  assert.match(user[1], /^\d+:\d+$/, 'use a numeric uid:gid so the image needs no passwd entry');
  assert.doesNotMatch(dockerfile, /^ENV .*(?:API_KEY|TOKEN|PASSWORD|SECRET)[ =]/im);
  // Health must gate on the loaded model, so the container is not "healthy" while it cannot answer.
  assert.match(directives, /^HEALTHCHECK .*timmy-worker-ready/m);
  assert.match(directives, /--start-period=\d+s/);
  assert.match(directives, /--host", "127\.0\.0\.1"/, 'the health probe runs on the container loopback');
  // The container listens inside its own network namespace; the run recipe, not the image, decides
  // exposure and publishes on loopback only (asserted separately).
  assert.match(dockerfile, /--host 0\.0\.0\.0|TIMMY_MODEL_HOST=0\.0\.0\.0/);
});

test('the build refuses a floating or missing pin before it reaches docker', async () => {
  const floating = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], {
    encoding: 'utf8',
    env: { ...process.env, TIMMY_LLAMA_CPP_COMMIT: 'latest' },
  });
  assert.notEqual(floating.status, 0, 'a floating llama.cpp ref must be rejected');
  assert.match(floating.stderr, /pin|40-hex|floating/i);

  const missingSha = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], {
    encoding: 'utf8',
    env: { ...process.env, TIMMY_MODEL_SHA256: '' },
  });
  assert.notEqual(missingSha.status, 0, 'a missing model hash must be rejected');

  const plan = spawnSync('bash', [buildScriptPath.pathname, '--print-plan'], { encoding: 'utf8' });
  assert.equal(plan.status, 0, plan.stderr);
  assert.match(plan.stdout, /llama\.cpp commit: [0-9a-f]{40}/);
  assert.match(plan.stdout, /SmolVLM2-2\.2B-Instruct-Q4_K_M\.gguf sha256: [0-9a-f]{64}/);
  assert.match(plan.stdout, /bind address: 127\.0\.0\.1:8080/);
  assert.match(plan.stdout, /publish: 127\.0\.0\.1:8080/);
});

test('the run recipe publishes on loopback only and drops every privilege it can', async () => {
  const { runScript } = await recipe();

  assert.match(runScript, /127\.0\.0\.1:\$\{?PORT/);
  assert.match(runScript, /--read-only/);
  assert.match(runScript, /--cap-drop[= ]ALL/);
  assert.match(runScript, /no-new-privileges/);
  assert.match(runScript, /--security-opt/);
  assert.doesNotMatch(runScript, /--privileged/);
  assert.doesNotMatch(runScript, /-p "\$PORT:/);
  assert.doesNotMatch(runScript, /\b0\.0\.0\.0\b/);
  // The model mount is read-only, and no credential has a default value.
  assert.match(runScript, /:ro\b/);
  assert.doesNotMatch(runScript, /(?:API_KEY|TOKEN|PASSWORD)=[^\s"']/);
});

test('the run recipe refuses to publish the worker anywhere but loopback', async () => {
  const hostile = spawnSync('bash', [runScriptPath.pathname, '--print-plan'], {
    encoding: 'utf8',
    env: { ...process.env, TIMMY_WORKER_PUBLISH_HOST: '0.0.0.0' },
  });
  assert.notEqual(hostile.status, 0, 'a non-loopback publish must be refused');
  assert.match(hostile.stderr, /loopback|127\.0\.0\.1/i);

  const plan = spawnSync('bash', [runScriptPath.pathname, '--print-plan'], { encoding: 'utf8' });
  assert.equal(plan.status, 0, plan.stderr);
  assert.match(plan.stdout, /publish: 127\.0\.0\.1:\d+/);
});

test('the build context excludes weights, user images, releases, and secrets', async () => {
  const { dockerignore } = await recipe();

  for (const pattern of ['*.gguf', 'artifacts/', 'video/', 'models/', '.git/', 'node_modules/', '.env', '.env.*']) {
    assert.ok(dockerignore.split('\n').includes(pattern), `dockerignore must exclude ${pattern}`);
  }
  // Committed synthetic fixtures are fine, but a real medical corpus directory is never buildable.
  assert.doesNotMatch(dockerignore, /^!.*\.gguf$/m);
});