import assert from "node:assert/strict";
import { execFile } from "node:child_process";
import { mkdtemp, mkdir, readFile, 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 { buildDesiredStatePlan } from "./src/deploy-desired-state-plan.mjs";

const execFileAsync = promisify(execFile);

async function git(repoRoot, args) {
  const result = await execFileAsync("git", args, {
    cwd: repoRoot,
    maxBuffer: 1024 * 1024
  });
  return result.stdout.trim();
}

async function makeFixture({
  serviceId = "hwlab-cloud-api",
  commitId = "abc1234",
  catalogCommitId = commitId,
  catalogServiceCommitId = catalogCommitId,
  catalogImageTag = catalogServiceCommitId.slice(0, 7),
  deployEnvCommitId = commitId,
  deployEnvImageTag = commitId,
  deployEnvImage = null,
  deployEnvMirrors = true,
  deploySkillsCommitId = null,
  deployCodeAgentProviderEnv = true,
  deployDbEnv = true,
  deployDbSslMode = "disable",
  workloadTag = commitId,
  workloadEnvCommitId = commitId,
  workloadEnvImageTag = commitId,
  workloadEnvImage = null,
  workloadEnvMirrors = true,
  workloadSkillsCommitId = null,
  workloadCodeAgentProviderEnv = true,
  workloadCodexHomeVolumeMounts = true,
  workloadCodexHomeVolumes = true,
  workloadDbEnv = true,
  workloadDbSslMode = "disable"
} = {}) {
  const root = await mkdtemp(path.join(os.tmpdir(), "hwlab-desired-state-"));
  await mkdir(path.join(root, "deploy/k8s/base"), { recursive: true });
  const image = `127.0.0.1:5000/hwlab/${serviceId}:${commitId}`;
  const catalogImage = `127.0.0.1:5000/hwlab/${serviceId}:${catalogImageTag}`;
  const workloadImage = `127.0.0.1:5000/hwlab/${serviceId}:${workloadTag}`;
  const providerBaseUrl = "http://172.26.26.227:17680/v1/responses";
  const providerEnv =
    serviceId === "hwlab-cloud-api" && deployCodeAgentProviderEnv
      ? {
          HWLAB_CODE_AGENT_PROVIDER: "codex-stdio",
          HWLAB_CODE_AGENT_MODEL: "gpt-5.5",
          HWLAB_CODE_AGENT_OPENAI_BASE_URL: providerBaseUrl,
          CODEX_HOME: "/codex-home",
          NO_PROXY: "hyueapi.com,.hyueapi.com,hyui.com,.hyui.com,127.0.0.1,localhost,::1,api.minimaxi.com,.minimaxi.com",
          no_proxy: "hyueapi.com,.hyueapi.com,hyui.com,.hyui.com,127.0.0.1,localhost,::1,api.minimaxi.com,.minimaxi.com",
          OPENAI_API_KEY: "secretRef:hwlab-code-agent-provider/openai-api-key"
        }
      : {};
  const workloadProviderEnv =
    serviceId === "hwlab-cloud-api" && workloadCodeAgentProviderEnv
      ? [
          { name: "HWLAB_CODE_AGENT_PROVIDER", value: "codex-stdio" },
          { name: "HWLAB_CODE_AGENT_MODEL", value: "gpt-5.5" },
          { name: "HWLAB_CODE_AGENT_OPENAI_BASE_URL", value: providerBaseUrl },
          { name: "CODEX_HOME", value: "/codex-home" },
          { name: "NO_PROXY", value: "hyueapi.com,.hyueapi.com,hyui.com,.hyui.com,127.0.0.1,localhost,::1,api.minimaxi.com,.minimaxi.com" },
          { name: "no_proxy", value: "hyueapi.com,.hyueapi.com,hyui.com,.hyui.com,127.0.0.1,localhost,::1,api.minimaxi.com,.minimaxi.com" },
          {
            name: "OPENAI_API_KEY",
            valueFrom: {
              secretKeyRef: {
                name: "hwlab-code-agent-provider",
                key: "openai-api-key"
              }
            }
          }
        ]
      : [];
  const dbEnv =
    serviceId === "hwlab-cloud-api" && deployDbEnv
      ? {
          HWLAB_CLOUD_DB_URL: "secretRef:hwlab-cloud-api-dev-db/database-url",
          HWLAB_CLOUD_DB_SSL_MODE: deployDbSslMode
        }
      : {};
  const workloadDbEntries =
    serviceId === "hwlab-cloud-api" && workloadDbEnv
      ? [
          {
            name: "HWLAB_CLOUD_DB_URL",
            valueFrom: {
              secretKeyRef: {
                name: "hwlab-cloud-api-dev-db",
                key: "database-url"
              }
            }
          },
          { name: "HWLAB_CLOUD_DB_SSL_MODE", value: workloadDbSslMode }
        ]
      : [];
  const deploy = {
    manifestVersion: "v1",
    environment: "dev",
    commitId,
    services: [
      {
        serviceId,
        image,
        namespace: "hwlab-dev",
        healthPath: "/health/live",
        profile: "dev",
        replicas: 1,
        env: deployEnvMirrors
          ? {
              HWLAB_COMMIT_ID: deployEnvCommitId,
              HWLAB_IMAGE: deployEnvImage ?? image,
              HWLAB_IMAGE_TAG: deployEnvImageTag,
              ...(deploySkillsCommitId ? { HWLAB_SKILLS_COMMIT_ID: deploySkillsCommitId } : {}),
              ...dbEnv,
              ...providerEnv
            }
          : {}
      }
    ]
  };
  const catalog = {
    catalogVersion: "v1",
    kind: "hwlab-artifact-catalog",
    environment: "dev",
    profile: "dev",
    namespace: "hwlab-dev",
    endpoint: "http://74.48.78.17:16667",
    commitId: catalogCommitId,
    artifactState: "contract-skeleton",
    publish: {
      ciPublished: false,
      registryVerified: false,
      provenance: "not_available_until_publish"
    },
    services: [
      {
        serviceId,
        commitId: catalogServiceCommitId,
        image: catalogImage,
        imageTag: catalogImageTag,
        digest: "not_published",
        publishState: "skeleton-only",
        artifactRequired: true
      }
    ]
  };
  const workloads = {
    apiVersion: "v1",
    kind: "List",
    items: [
      {
        apiVersion: "apps/v1",
        kind: "Deployment",
        metadata: {
          name: serviceId,
          namespace: "hwlab-dev",
          labels: {
            "hwlab.pikastech.local/service-id": serviceId
          }
        },
        spec: {
          template: {
            spec: {
              containers: [
                {
                  name: serviceId,
                  image: workloadImage,
                  env: workloadEnvMirrors
                    ? [
                        { name: "HWLAB_COMMIT_ID", value: workloadEnvCommitId },
                        { name: "HWLAB_IMAGE", value: workloadEnvImage ?? image },
                        { name: "HWLAB_IMAGE_TAG", value: workloadEnvImageTag },
                        ...(workloadSkillsCommitId ? [{ name: "HWLAB_SKILLS_COMMIT_ID", value: workloadSkillsCommitId }] : []),
                        ...workloadDbEntries,
                        ...workloadProviderEnv
                      ]
                    : [],
                  ...(serviceId === "hwlab-cloud-api" && workloadCodeAgentProviderEnv && workloadCodexHomeVolumeMounts
                    ? {
                        volumeMounts: [
                          { name: "hwlab-code-agent-codex-home", mountPath: "/codex-home" },
                          { name: "hwlab-code-agent-codex-config", mountPath: "/codex-home/config.toml", subPath: "config.toml", readOnly: true },
                          { name: "hwlab-code-agent-codex-auth", mountPath: "/codex-home/auth.json", subPath: "auth.json", readOnly: true }
                        ]
                      }
                    : {})
                }
              ],
              ...(serviceId === "hwlab-cloud-api" && workloadCodeAgentProviderEnv && workloadCodexHomeVolumes
                ? {
                    volumes: [
                      { name: "hwlab-code-agent-codex-home", emptyDir: {} },
                      { name: "hwlab-code-agent-codex-config", configMap: { name: "hwlab-code-agent-codex-config", items: [{ key: "config.toml", path: "config.toml" }] } },
                      { name: "hwlab-code-agent-codex-auth", secret: { secretName: "hwlab-code-agent-codex-auth", items: [{ key: "auth.json", path: "auth.json" }] } }
                    ]
                  }
                : {})
            }
          }
        }
      }
    ]
  };
  await writeFile(path.join(root, "deploy/deploy.json"), `${JSON.stringify(deploy, null, 2)}\n`);
  await writeFile(path.join(root, "deploy/artifact-catalog.dev.json"), `${JSON.stringify(catalog, null, 2)}\n`);
  await writeFile(path.join(root, "deploy/k8s/base/workloads.yaml"), `${JSON.stringify(workloads, null, 2)}\n`);
  return root;
}

test("passes internally consistent desired-state", async () => {
  const repoRoot = await makeFixture();
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "pass");
  assert.equal(plan.summary.desiredCommitId, "abc1234");
  assert.equal(plan.summary.presentMirrorCount, 6);
  assert.deepEqual(plan.diagnostics, []);
});

test("passes when cloud-web owns runtime identity mirrors", async () => {
  const repoRoot = await makeFixture({ serviceId: "hwlab-cloud-web" });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "pass");
  assert.equal(plan.summary.presentMirrorCount, 6);
  assert.deepEqual(plan.diagnostics, []);
});

test("passes when cloud-api preserves provider env and DEV egress contract", async () => {
  const repoRoot = await makeFixture();
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "pass");
  assert.equal(plan.cloudApiDb.ready, true);
  assert.equal(plan.cloudApiDb.sslMode.expected, "disable");
  assert.equal(plan.cloudApiDb.sslMode.deployMatches, true);
  assert.equal(plan.cloudApiDb.sslMode.workloadMatches, true);
  assert.equal(plan.codeAgentProvider.ready, true);
  assert.equal(plan.codeAgentProvider.provider, "codex-stdio");
  assert.equal(plan.codeAgentProvider.runtimeProvider, "openai-responses");
  assert.equal(plan.codeAgentProvider.backend, "hwlab-cloud-api/codex-app-server-stdio");
  assert.equal(plan.codeAgentProvider.secretRef.present, true);
  assert.equal(plan.codeAgentProvider.egress.deployMatchesDevProxy, true);
  assert.equal(plan.codeAgentProvider.codexHome.present, true);
  assert.equal(plan.codeAgentProvider.codexHome.writableHomeMountPresent, true);
  assert.equal(plan.codeAgentProvider.codexHome.emptyDirPresent, true);
  assert.equal(plan.codeAgentProvider.codexHome.configMapPresent, true);
  assert.equal(plan.codeAgentProvider.codexHome.authSecretPresent, true);
  assert.deepEqual(plan.diagnostics, []);
});

test("blocks when cloud-api CODEX_HOME mount is missing its writable emptyDir volume", async () => {
  const repoRoot = await makeFixture({ workloadCodexHomeVolumes: false });
  const plan = await buildDesiredStatePlan({ repoRoot });
  const diagnostic = plan.diagnostics.find((entry) => entry.code === "code_agent_provider_contract_mismatch");

  assert.equal(plan.status, "blocked");
  assert.equal(plan.codeAgentProvider.ready, false);
  assert.equal(plan.codeAgentProvider.codexHome.present, false);
  assert.equal(plan.codeAgentProvider.codexHome.writableHomeMountPresent, true);
  assert.equal(plan.codeAgentProvider.codexHome.emptyDirPresent, false);
  assert.ok(diagnostic);
  assert.ok(diagnostic.actual.missingCodexHomeContract.includes("/codex-home must be backed by emptyDir"));
});

test("blocks when cloud-api CODEX_HOME mount is read-only", async () => {
  const repoRoot = await makeFixture();
  const workloadsPath = path.join(repoRoot, "deploy/k8s/base/workloads.yaml");
  const workloads = JSON.parse(await readFile(workloadsPath, "utf8"));
  workloads.items[0].spec.template.spec.containers[0].volumeMounts.find((entry) =>
    entry.name === "hwlab-code-agent-codex-home"
  ).readOnly = true;
  await writeFile(workloadsPath, `${JSON.stringify(workloads, null, 2)}\n`);

  const plan = await buildDesiredStatePlan({ repoRoot });
  const diagnostic = plan.diagnostics.find((entry) => entry.code === "code_agent_provider_contract_mismatch");

  assert.equal(plan.status, "blocked");
  assert.equal(plan.codeAgentProvider.ready, false);
  assert.equal(plan.codeAgentProvider.codexHome.present, false);
  assert.equal(plan.codeAgentProvider.codexHome.writableHomeMountPresent, false);
  assert.equal(plan.codeAgentProvider.codexHome.emptyDirPresent, true);
  assert.ok(diagnostic);
  assert.ok(diagnostic.actual.missingCodexHomeContract.includes("/codex-home must be a writable volumeMount"));
});

test("blocks when cloud-api DB SSL mode drifts back to require", async () => {
  const repoRoot = await makeFixture({
    deployDbSslMode: "require",
    workloadDbSslMode: "require"
  });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.cloudApiDb.ready, false);
  assert.equal(plan.cloudApiDb.sslMode.expected, "disable");
  assert.equal(plan.cloudApiDb.sslMode.deployMatches, false);
  assert.equal(plan.cloudApiDb.sslMode.workloadMatches, false);
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "cloud_api_db_contract_mismatch"));
});

test("blocks when cloud-web runtime identity mirrors are missing", async () => {
  const repoRoot = await makeFixture({
    serviceId: "hwlab-cloud-web",
    deployEnvMirrors: false,
    workloadEnvMirrors: false
  });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.summary.blockers, 6);
  assert.ok(plan.diagnostics.some((diagnostic) =>
    diagnostic.code === "missing_mirror" &&
    diagnostic.path === "deploy/deploy.json.services.hwlab-cloud-web.env.HWLAB_COMMIT_ID"
  ));
  assert.ok(plan.diagnostics.some((diagnostic) =>
    diagnostic.code === "missing_mirror" &&
    diagnostic.path.endsWith(".env.HWLAB_IMAGE_TAG")
  ));
});

test("blocks when cloud-api provider env is missing from desired state", async () => {
  const repoRoot = await makeFixture({ deployCodeAgentProviderEnv: false, workloadCodeAgentProviderEnv: false });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.codeAgentProvider.ready, false);
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "code_agent_provider_contract_mismatch"));
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.path === "deploy.codeAgentProvider"));
});

test("blocks when cloud-api workload points Code Agent directly at public OpenAI", async () => {
  const repoRoot = await makeFixture();
  const workloadsPath = path.join(repoRoot, "deploy/k8s/base/workloads.yaml");
  const workloads = JSON.parse(await readFile(workloadsPath, "utf8"));
  const env = workloads.items[0].spec.template.spec.containers[0].env;
  env.find((entry) => entry.name === "HWLAB_CODE_AGENT_OPENAI_BASE_URL").value = "https://api.openai.com/v1/responses";
  await writeFile(workloadsPath, `${JSON.stringify(workloads, null, 2)}\n`);

  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.codeAgentProvider.egress.directPublicOpenAi, true);
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "code_agent_provider_contract_mismatch"));
});

test("target tag review is read-only promotion_pending when current state is uniformly older", async () => {
  const repoRoot = await makeFixture();
  const plan = await buildDesiredStatePlan({ repoRoot, targetTag: "def5678" });
  assert.equal(plan.status, "planned");
  assert.equal(plan.target.convergence.state, "promotion_pending");
  assert.equal(plan.summary.blockers, 0);
  assert.match(plan.services[0].promotion.deployImage, /:def5678$/u);
});

test("target check blocks when current desired-state is uniformly older", async () => {
  const repoRoot = await makeFixture();
  const plan = await buildDesiredStatePlan({ repoRoot, targetTag: "def5678", requireTargetConvergence: true });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.target.convergence.state, "target_mismatch");
  assert.equal(plan.target.convergenceRequirement, "target-check");
  assert.ok(plan.diagnostics.some((diagnostic) =>
    diagnostic.code === "target_desired_state_mismatch" &&
    diagnostic.message.includes("stale desired-state is not pinned")
  ));
});

test("target check accepts accepted first-parent main on the checked-out merge commit", async () => {
  const repoRoot = await makeFixture();
  await git(repoRoot, ["init", "-b", "main"]);
  await git(repoRoot, ["config", "user.email", "test@example.invalid"]);
  await git(repoRoot, ["config", "user.name", "HWLAB Test"]);
  await git(repoRoot, ["add", "."]);
  await git(repoRoot, ["commit", "-m", "base"]);

  const acceptedMain = await git(repoRoot, ["rev-parse", "HEAD"]);
  const acceptedTag = acceptedMain.slice(0, 7);
  await git(repoRoot, ["checkout", "-b", "desired-state-refresh"]);

  for (const relativePath of [
    "deploy/deploy.json",
    "deploy/artifact-catalog.dev.json",
    "deploy/k8s/base/workloads.yaml"
  ]) {
    const filePath = path.join(repoRoot, relativePath);
    const raw = await readFile(filePath, "utf8");
    await writeFile(filePath, raw.replaceAll("abc1234", acceptedTag));
  }
  await git(repoRoot, ["add", "."]);
  await git(repoRoot, ["commit", "-m", "refresh desired-state"]);
  await git(repoRoot, ["checkout", "main"]);
  await git(repoRoot, ["merge", "--no-ff", "desired-state-refresh", "-m", "merge desired-state refresh"]);

  const mergeCommit = await git(repoRoot, ["rev-parse", "HEAD"]);
  const plan = await buildDesiredStatePlan({ repoRoot, targetRef: "HEAD", requireTargetConvergence: true });

  assert.equal(plan.status, "pass");
  assert.equal(plan.target.commitId, mergeCommit);
  assert.equal(plan.target.acceptedCurrentMain.commitId, acceptedMain);
  assert.equal(plan.target.comparisonCommitId, acceptedMain);
  assert.equal(plan.target.comparisonTag, acceptedTag);
  assert.equal(plan.target.convergence.state, "accepted_main_promoted");
  assert.deepEqual(plan.diagnostics, []);
});

test("promotion commit check blocks when current desired-state is uniformly older", async () => {
  const repoRoot = await makeFixture();
  const plan = await buildDesiredStatePlan({ repoRoot, promotionCommit: "def5678" });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.target.convergence.state, "promotion_mismatch");
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "promotion_commit_mismatch"));
});

test("promotion commit check passes when every desired-state field is converged", async () => {
  const repoRoot = await makeFixture({ commitId: "def5678" });
  const plan = await buildDesiredStatePlan({ repoRoot, promotionCommit: "def5678" });
  assert.equal(plan.status, "pass");
  assert.equal(plan.target.convergence.state, "already_promoted");
  assert.deepEqual(plan.diagnostics, []);
});

test("promotion commit check blocks an explicit non-matching target tag", async () => {
  const repoRoot = await makeFixture({ commitId: "def5678" });
  const plan = await buildDesiredStatePlan({
    repoRoot,
    promotionCommit: "def5678",
    targetTag: "abc1234"
  });
  assert.equal(plan.status, "blocked");
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "promotion_tag_mismatch"));
});

test("blocks on mirror drift", async () => {
  const repoRoot = await makeFixture({ workloadEnvImageTag: "badcafe" });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.summary.blockers, 1);
  assert.equal(plan.diagnostics[0].code, "mirror_mismatch");
  assert.match(plan.diagnostics[0].path, /HWLAB_IMAGE_TAG/u);
});

test("blocks on skills commit mirror drift", async () => {
  const repoRoot = await makeFixture({ deploySkillsCommitId: "badcafe" });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.ok(plan.diagnostics.some((diagnostic) =>
    diagnostic.code === "mirror_mismatch" &&
    diagnostic.path.endsWith("HWLAB_SKILLS_COMMIT_ID")
  ));
});

test("blocks on workload image drift", async () => {
  const repoRoot = await makeFixture({ workloadTag: "badcafe" });
  const plan = await buildDesiredStatePlan({ repoRoot });
  assert.equal(plan.status, "blocked");
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "image_tag_mismatch"));
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "image_mismatch"));
});

test("reports partial target drift when catalog top-level commit moves but services stay old", async () => {
  const repoRoot = await makeFixture({ catalogCommitId: "def5678" });
  const plan = await buildDesiredStatePlan({ repoRoot, targetTag: "def5678" });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.target.convergence.state, "partial_drift");
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "partial_target_drift"));
});

test("reports partial target drift as a blocker", async () => {
  const repoRoot = await makeFixture({ workloadTag: "def5678", workloadEnvImageTag: "def5678" });
  const plan = await buildDesiredStatePlan({ repoRoot, targetTag: "def5678" });
  assert.equal(plan.status, "blocked");
  assert.equal(plan.target.convergence.state, "partial_drift");
  assert.ok(plan.diagnostics.some((diagnostic) => diagnostic.code === "partial_target_drift"));
});