import assert from "node:assert/strict";
import { execFile } from "node:child_process";
import { mkdir, mkdtemp, writeFile } from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import test from "node:test";
import { promisify } from "node:util";

import {
  classifyGlobalChange,
  componentModelsForServices,
  createG14CiPlan,
  matchingPaths
} from "./src/g14-ci-plan-lib.mjs";

const execFileAsync = promisify(execFile);

test("G14 CI planner maps bridge changes to cloud-api only", async () => {
  const repo = await createFixtureRepo({ includeDevicePod: true });
  await writeFile(path.join(repo, "cmd/hwlab-deepseek-responses-bridge/main.ts"), "console.log('bridge v2');\n");
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "change bridge"]);

  const plan = await createG14CiPlan({ repoRoot: repo, baseRef: "HEAD~1", targetRef: "HEAD" });
  assert.deepEqual(plan.affectedServices, ["hwlab-cloud-api"]);
  assert.equal(plan.reusedServices.includes("hwlab-cloud-web"), true);
  const cloudApi = plan.services.find((service) => service.serviceId === "hwlab-cloud-api");
  assert.equal(cloudApi.affected, true);
  assert.deepEqual(cloudApi.reason, ["component-path-changed"]);
});

test("G14 CI planner treats docs-only changes as no image build", async () => {
  const repo = await createFixtureRepo();
  await mkdir(path.join(repo, "docs/reference"), { recursive: true });
  await writeFile(path.join(repo, "docs/reference/g14-gitops-cicd.md"), "docs v2\n");
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "change docs"]);

  const plan = await createG14CiPlan({ repoRoot: repo, baseRef: "HEAD~1", targetRef: "HEAD" });
  assert.deepEqual(plan.affectedServices, []);
  assert.equal(plan.imageBuildRequired, false);
  assert.equal(plan.changedPathSummary.docsOnly, true);
});

test("planner rebuilds when catalog digest is missing instead of blocking reuse", async () => {
  const repo = await createFixtureRepo({ catalog: "missing-digest" });
  await mkdir(path.join(repo, "docs/reference"), { recursive: true });
  await writeFile(path.join(repo, "docs/reference/g14-gitops-cicd.md"), "docs v2\n");
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "change docs"]);

  const plan = await createG14CiPlan({ repoRoot: repo, baseRef: "HEAD~1", targetRef: "HEAD" });
  assert.deepEqual(plan.affectedServices, ["hwlab-cloud-api", "hwlab-cloud-web"]);
  assert.equal(plan.imageBuildRequired, true);
  assert.equal(plan.services[0].reason.includes("catalog-digest-missing"), true);
});

test("component model uses built-in service paths", () => {
  const models = componentModelsForServices(["hwlab-cloud-api"]);
  assert.deepEqual(models[0].componentPaths, [
    "cmd/hwlab-cloud-api/",
    "cmd/hwlab-codex-api-responses-forwarder/",
    "cmd/hwlab-deepseek-responses-bridge/",
    "internal/audit/",
    "internal/cloud/",
    "internal/db/",
    "skills/",
    "tools/"
  ]);
  assert.deepEqual(matchingPaths(["cmd/hwlab-cloud-api/main.ts"], models[0].componentPaths), ["cmd/hwlab-cloud-api/main.ts"]);
});

test("planner remains compatible with deploy.k3s.serviceMappings shape", async () => {
  const repo = await createFixtureRepo({ deployServices: false, k3sServiceMappings: true });
  await writeFile(path.join(repo, "cmd/hwlab-deepseek-responses-bridge/main.ts"), "console.log('bridge v2');\n");
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "change bridge"]);

  const plan = await createG14CiPlan({ repoRoot: repo, baseRef: "HEAD~1", targetRef: "HEAD" });
  assert.equal(plan.compatibility.currentRenderCompatible, true);
  assert.equal(plan.compatibility.serviceIdSource, "deploy.k3s.serviceMappings");
  assert.deepEqual(plan.affectedServices, ["hwlab-cloud-api"]);
  assert.equal(plan.inputs.serviceCount, 2);
});

test("global change classifier distinguishes gitops-only and test-only", () => {
  assert.equal(classifyGlobalChange(["deploy/gitops/g14/runtime-dev/workloads.yaml"]).gitopsOnly, true);
  assert.equal(classifyGlobalChange(["cmd/hwlab-cloud-api/runtime-options.test.ts"]).testOnly, true);
});

test("v02 planner marks device-pod code-only change as env reuse rollout", async () => {
  const repo = await createFixtureRepo({ includeDevicePod: true });
  const initialSha = (await git(repo, ["rev-parse", "HEAD"])).stdout.trim();
  const initialPlan = await createG14CiPlan({
    repoRoot: repo,
    lane: "v02",
    baseRef: "HEAD",
    targetRef: initialSha,
    artifactCatalogPath: "deploy/artifact-catalog.v02.json",
    services: ["hwlab-device-pod"]
  });
  const initialDevicePod = initialPlan.services.find((service) => service.serviceId === "hwlab-device-pod");
  await writeFile(path.join(repo, "deploy/artifact-catalog.v02.json"), JSON.stringify(createCatalogFixture("ready", {
    devicePodEnvironmentInputHash: initialDevicePod.environmentInputHash,
    devicePodCodeInputHash: initialDevicePod.codeInputHash,
    devicePodBootCommit: initialPlan.sourceCommitId
  }), null, 2));
  await git(repo, ["add", "deploy/artifact-catalog.v02.json"]);
  await git(repo, ["commit", "-m", "seed v02 catalog"]);

  await writeFile(path.join(repo, "internal/device-pod/executor.ts"), "export const version = 2;\n");
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "change device pod code"]);

  const plan = await createG14CiPlan({
    repoRoot: repo,
    lane: "v02",
    baseRef: "HEAD~1",
    targetRef: "HEAD",
    artifactCatalogPath: "deploy/artifact-catalog.v02.json",
    services: ["hwlab-device-pod"]
  });
  const devicePod = plan.services.find((service) => service.serviceId === "hwlab-device-pod");
  assert.equal(devicePod.runtimeMode, "env-reuse-git-mirror-checkout");
  assert.equal(devicePod.envChanged, false);
  assert.equal(devicePod.codeChanged, true);
  assert.equal(devicePod.buildRequired, false);
  assert.equal(devicePod.bootSh, "deploy/runtime/boot/hwlab-device-pod.sh");
  assert.deepEqual(plan.affectedServices, ["hwlab-device-pod"]);
  assert.deepEqual(plan.rolloutServices, ["hwlab-device-pod"]);
  assert.deepEqual(plan.buildServices, []);
  assert.equal(plan.imageBuildRequired, false);
  assert.deepEqual(plan.ciCdPlan.willBuild, []);
  assert.deepEqual(plan.ciCdPlan.willRollout, ["hwlab-device-pod"]);
  assert.equal(plan.ciCdPlan.noImageBuildReason, "env-reuse-code-only-rollout");
});

async function createFixtureRepo(options = {}) {
  const deployServices = options.deployServices !== false;
  const k3sServiceMappings = options.k3sServiceMappings === true;
  const includeDevicePod = options.includeDevicePod === true;
  const repo = await mkdtemp(path.join(os.tmpdir(), "hwlab-g14-ci-plan-"));
  await mkdir(path.join(repo, "cmd/hwlab-cloud-api"), { recursive: true });
  await mkdir(path.join(repo, "cmd/hwlab-deepseek-responses-bridge"), { recursive: true });
  await mkdir(path.join(repo, "web/hwlab-cloud-web"), { recursive: true });
  await mkdir(path.join(repo, "internal/device-pod"), { recursive: true });
  await mkdir(path.join(repo, "deploy/runtime/boot"), { recursive: true });
  await mkdir(path.join(repo, "deploy/runtime/launcher"), { recursive: true });
  await mkdir(path.join(repo, "deploy"), { recursive: true });
  await writeFile(path.join(repo, "deploy/deploy.json"), JSON.stringify(createDeployFixture({ deployServices, k3sServiceMappings, includeDevicePod }), null, 2));
  const catalogMode = options.catalog ?? "ready";
  if (catalogMode !== false) {
    await writeFile(path.join(repo, "deploy/artifact-catalog.dev.json"), JSON.stringify(createCatalogFixture(catalogMode), null, 2));
    await writeFile(path.join(repo, "deploy/artifact-catalog.v02.json"), JSON.stringify(createCatalogFixture(catalogMode), null, 2));
  }
  await writeFile(path.join(repo, "package.json"), JSON.stringify({ type: "module" }, null, 2));
  await writeFile(path.join(repo, "package-lock.json"), JSON.stringify({ lockfileVersion: 3 }, null, 2));
  await writeFile(path.join(repo, "cmd/hwlab-cloud-api/main.ts"), "console.log('api');\n");
  await writeFile(path.join(repo, "cmd/hwlab-deepseek-responses-bridge/main.ts"), "console.log('bridge');\n");
  await writeFile(path.join(repo, "cmd/hwlab-deepseek-responses-bridge/main.test.ts"), "console.log('test');\n");
  await writeFile(path.join(repo, "web/hwlab-cloud-web/index.html"), "<html></html>\n");
  await writeFile(path.join(repo, "internal/device-pod/executor.ts"), "export const version = 1;\n");
  await writeFile(path.join(repo, "deploy/runtime/boot/hwlab-device-pod.sh"), "#!/bin/sh\nexec bun cmd/hwlab-device-pod/main.ts\n");
  await writeFile(path.join(repo, "deploy/runtime/launcher/hwlab-env-reuse-launcher.ts"), "console.log('launcher');\n");
  await git(repo, ["init"]);
  await git(repo, ["add", "."]);
  await git(repo, ["commit", "-m", "initial"]);
  return repo;
}

function createDeployFixture({ deployServices, k3sServiceMappings, includeDevicePod }) {
  const deploy = {
    lanes: {
      v02: {
        sourceRepo: "git@github.com:pikasTech/HWLAB.git",
        envReuseServices: ["hwlab-device-pod"],
        bootScripts: { "hwlab-device-pod": "deploy/runtime/boot/hwlab-device-pod.sh" }
      }
    }
  };
  if (deployServices) {
    deploy.services = [
      { serviceId: "hwlab-cloud-api" },
      { serviceId: "hwlab-cloud-web" },
      ...(includeDevicePod ? [{ serviceId: "hwlab-device-pod" }] : [])
    ];
  }
  if (k3sServiceMappings) {
    deploy.k3s = {
      serviceMappings: [
        { serviceId: "hwlab-cloud-api", name: "hwlab-cloud-api" },
        { serviceId: "hwlab-cloud-web", name: "hwlab-cloud-web" },
        ...(includeDevicePod ? [{ serviceId: "hwlab-device-pod", name: "hwlab-device-pod" }] : [])
      ]
    };
  }
  return deploy;
}

function createCatalogFixture(mode, options = {}) {
  const digest = mode === "ready" ? `sha256:${"1".repeat(64)}` : "not_published";
  return {
    services: ["hwlab-cloud-api", "hwlab-cloud-web", "hwlab-device-pod"].map((serviceId) => ({
      serviceId,
      commitId: "abc1234",
      image: `127.0.0.1:5000/hwlab/${serviceId}:abc1234`,
      imageTag: "abc1234",
      digest,
      ...(serviceId === "hwlab-device-pod" ? {
        runtimeMode: "env-reuse-git-mirror-checkout",
        envReuse: true,
        environmentImage: "127.0.0.1:5000/hwlab/hwlab-device-pod-env:env-abc1234",
        environmentDigest: digest,
        environmentInputHash: options.devicePodEnvironmentInputHash ?? "e".repeat(64),
        codeInputHash: options.devicePodCodeInputHash ?? "c".repeat(64),
        bootRepo: "git@github.com:pikasTech/HWLAB.git",
        bootCommit: options.devicePodBootCommit ?? "abc1234",
        bootSh: "deploy/runtime/boot/hwlab-device-pod.sh"
      } : {})
    }))
  };
}

async function git(cwd, args) {
  return execFileAsync("git", ["-c", "user.name=HWLAB Test", "-c", "user.email=hwlab-test@example.invalid", ...args], { cwd });
}