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

import { buildDesiredStatePlan } from "./src/deploy-desired-state-plan.mjs";

async function makeFixture({ commitId = "abc1234", workloadTag = commitId, workloadEnvTag = commitId } = {}) {
  const root = await mkdtemp(path.join(os.tmpdir(), "hwlab-desired-state-"));
  await mkdir(path.join(root, "deploy/k8s/base"), { recursive: true });
  await mkdir(path.join(root, "reports/dev-gate"), { recursive: true });
  const image = `127.0.0.1:5000/hwlab/hwlab-cloud-api:${commitId}`;
  const workloadImage = `127.0.0.1:5000/hwlab/hwlab-cloud-api:${workloadTag}`;
  const deploy = {
    manifestVersion: "v1",
    environment: "dev",
    commitId,
    services: [
      {
        serviceId: "hwlab-cloud-api",
        image,
        namespace: "hwlab-dev",
        healthPath: "/health/live",
        profile: "dev",
        replicas: 1,
        env: {
          HWLAB_COMMIT_ID: commitId,
          HWLAB_IMAGE: image,
          HWLAB_IMAGE_TAG: commitId
        }
      }
    ]
  };
  const catalog = {
    catalogVersion: "v1",
    kind: "hwlab-artifact-catalog",
    environment: "dev",
    profile: "dev",
    namespace: "hwlab-dev",
    endpoint: "http://74.48.78.17:16667",
    commitId,
    artifactState: "contract-skeleton",
    publish: {
      ciPublished: false,
      registryVerified: false,
      provenance: "not_available_until_publish"
    },
    services: [
      {
        serviceId: "hwlab-cloud-api",
        commitId,
        image,
        imageTag: commitId,
        digest: "not_published",
        publishState: "skeleton-only",
        artifactRequired: true
      }
    ]
  };
  const workloads = {
    apiVersion: "v1",
    kind: "List",
    items: [
      {
        apiVersion: "apps/v1",
        kind: "Deployment",
        metadata: {
          name: "hwlab-cloud-api",
          namespace: "hwlab-dev",
          labels: {
            "hwlab.pikastech.local/service-id": "hwlab-cloud-api"
          }
        },
        spec: {
          template: {
            spec: {
              containers: [
                {
                  name: "hwlab-cloud-api",
                  image: workloadImage,
                  env: [
                    { name: "HWLAB_COMMIT_ID", value: commitId },
                    { name: "HWLAB_IMAGE", value: image },
                    { name: "HWLAB_IMAGE_TAG", value: workloadEnvTag }
                  ]
                }
              ]
            }
          }
        }
      }
    ]
  };
  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("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("blocks on mirror drift", async () => {
  const repoRoot = await makeFixture({ workloadEnvTag: "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 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 as a blocker", async () => {
  const repoRoot = await makeFixture({ workloadTag: "def5678", workloadEnvTag: "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"));
});