import { afterEach, describe, expect, test } from "bun:test";
import type { V1Deployment } from "@kubernetes/client-node";
import { mkdtemp, mkdir, rm, writeFile } from "node:fs/promises";
import { join } from "node:path";
import { tmpdir } from "node:os";
import type { ComposeSpecification, Service } from "../../schema/docker.d";
import {
  composeToKubernetes,
  envFromToSecrets,
  serviceToDeployment,
  volumesToConfigMaps,
  volumesToPvc,
  volumesToStorageClasses,
} from "../../lib/convert";

const temporaryDirectories: string[] = [];

async function temporaryDirectory(): Promise<string> {
  const path = await mkdtemp(join(tmpdir(), "kuber-convert-"));
  temporaryDirectories.push(path);
  return path;
}

afterEach(async () => {
  await Promise.all(
    temporaryDirectories
      .splice(0)
      .map((path) => rm(path, { recursive: true, force: true })),
  );
});

describe("volume conversion", () => {
  test("renders named volumes with a default Longhorn storage class", () => {
    const claims = volumesToPvc("project", {
      volumes: ["data:/var/lib/data"],
    } as Service);
    expect(claims).toHaveLength(1);
    expect(claims[0]).toMatchObject({
      metadata: { name: "project-data", namespace: "project" },
      spec: {
        resources: { requests: { storage: "1Gi" } },
        storageClassName: expect.stringMatching(
          /^kuber-longhorn-[a-f0-9]{12}$/,
        ),
      },
    });

    expect(
      volumesToStorageClasses({ volumes: ["data:/var/lib/data"] } as Service),
    ).toEqual([
      expect.objectContaining({
        kind: "StorageClass",
        metadata: {
          name: claims[0]?.spec?.storageClassName,
          labels: expect.any(Object),
        },
        provisioner: "driver.longhorn.io",
        parameters: {
          diskSelector: "fast",
          numberOfReplicas: "2",
          dataLocality: "disabled",
        },
      }),
    ]);
  });

  test("parses inline storage sizing and placement", () => {
    const [claim] = volumesToPvc("project", {
      volumes: ["data(20Gi on 3 fast,archive):/data"],
    } as Service);
    expect(claim).toMatchObject({
      metadata: { name: "project-data" },
      spec: {
        resources: { requests: { storage: "20Gi" } },
        storageClassName: expect.stringMatching(/^kuber-longhorn-/),
      },
    });
    expect(
      volumesToStorageClasses({
        volumes: ["data(20Gi on 3 fast,archive):/data"],
      } as Service)[0],
    ).toMatchObject({
      parameters: {
        diskSelector: "archive,fast",
        numberOfReplicas: "3",
        dataLocality: "disabled",
      },
    });
  });

  test("uses top-level volume extensions", () => {
    const [claim] = volumesToPvc(
      "project",
      { volumes: ["data:/data"] } as Service,
      process.cwd(),
      {
        data: {
          "x-size": "50Gi",
          "x-diskTag": ["bulk", "archive"],
          "x-replicaCount": 3,
          "x-dataLocality": "none",
        },
      } as ComposeSpecification["volumes"],
    );
    expect(claim?.spec).toMatchObject({
      resources: { requests: { storage: "50Gi" } },
      storageClassName: expect.stringMatching(/^kuber-longhorn-/),
    });
  });

  test("does not create PVCs for anonymous, tmpfs, or managed claims", () => {
    expect(
      volumesToPvc("project", {
        volumes: ["/cache", "postgresql:app", "s3:assets"],
        tmpfs: ["/tmp"],
      } as Service),
    ).toEqual([]);
  });

  test("renders anonymous and tmpfs mounts as emptyDir", () => {
    const service = {
      image: "app",
      volumes: ["/cache"],
      tmpfs: ["/tmp"],
    } as Service;
    const deployment = serviceToDeployment(
      "project",
      "app",
      { services: { app: service } } as ComposeSpecification,
      service,
    );
    expect(deployment.spec?.template.spec?.volumes).toEqual([
      { name: "volume-0", emptyDir: {} },
      { name: "tmpfs-1", emptyDir: { medium: "Memory", sizeLimit: undefined } },
    ]);
  });

  test("renders long-form tmpfs size and read-only volume subpaths", () => {
    const service = {
      image: "app",
      volumes: [
        { type: "tmpfs", target: "/tmp", tmpfs: { size: 1024 } },
        {
          type: "volume",
          source: "data",
          target: "/data",
          read_only: true,
          volume: { subpath: "nested" },
        },
      ],
    } as Service;
    const deployment = serviceToDeployment(
      "project",
      "app",
      { services: { app: service } } as ComposeSpecification,
      service,
    );
    expect(deployment.spec?.template.spec?.volumes?.[0]).toEqual({
      name: "tmpfs-0",
      emptyDir: { medium: "Memory", sizeLimit: "1024" },
    });
    expect(
      deployment.spec?.template.spec?.containers[0]?.volumeMounts?.[1],
    ).toMatchObject({
      mountPath: "/data",
      readOnly: true,
      subPath: "nested",
    });
  });

  test("turns file binds into ConfigMaps", async () => {
    const directory = await temporaryDirectory();
    await writeFile(join(directory, "app.conf"), "enabled=true\n");
    const service = {
      image: "app",
      volumes: ["./app.conf:/etc/app.conf:ro"],
    } as Service;
    const configMaps = volumesToConfigMaps("project", service, directory);
    expect(configMaps).toHaveLength(1);
    expect(configMaps[0]?.data).toEqual({ "app.conf": "enabled=true\n" });
    const deployment = serviceToDeployment(
      "project",
      "app",
      { services: { app: service } } as ComposeSpecification,
      service,
      directory,
    );
    expect(
      deployment.spec?.template.spec?.containers[0]?.volumeMounts?.[0],
    ).toMatchObject({
      mountPath: "/etc/app.conf",
      readOnly: true,
      subPath: "app.conf",
    });
  });

  test("turns directory binds into PVCs", async () => {
    const directory = await temporaryDirectory();
    await mkdir(join(directory, "uploads"));
    const claims = volumesToPvc(
      "project",
      { volumes: ["./uploads:/uploads"] } as Service,
      directory,
    );
    expect(claims).toHaveLength(1);
    expect(claims[0]?.metadata?.name).toStartWith("bind-");
  });
});

describe("environment Secret conversion", () => {
  test("parses env files, ignores comments, and applies generated overrides", async () => {
    const directory = await temporaryDirectory();
    await writeFile(
      join(directory, ".env"),
      "# comment\nA=one\nTOKEN=a=b=c\nINVALID\n =ignored\n",
    );
    const [secret] = await envFromToSecrets(
      "project",
      "app",
      { env_file: ".env" } as Service,
      directory,
      { A: "generated", EXTRA: "yes" },
    );
    expect(secret?.stringData).toEqual({
      A: "generated",
      TOKEN: "a=b=c",
      EXTRA: "yes",
    });
  });

  test("allows optional missing env files", async () => {
    const directory = await temporaryDirectory();
    expect(
      await envFromToSecrets(
        "project",
        "app",
        { env_file: [{ path: "missing.env", required: false }] } as Service,
        directory,
      ),
    ).toEqual([]);
  });

  test("rejects required missing env files", async () => {
    const directory = await temporaryDirectory();
    await expect(
      envFromToSecrets(
        "project",
        "app",
        { env_file: "missing.env" } as Service,
        directory,
      ),
    ).rejects.toThrow();
  });
});

describe("whole Compose conversion", () => {
  test("deduplicates shared PVCs and includes service-specific generated env", async () => {
    const compose = {
      services: {
        app: { image: "app", volumes: ["data:/data"], ports: [3000] },
        worker: { image: "worker", volumes: ["data:/data"] },
      },
      volumes: { data: {} },
    } as ComposeSpecification;
    const resources = await composeToKubernetes(
      "project",
      compose,
      process.cwd(),
      {
        app: { GENERATED: "yes" },
      },
    );
    expect(
      resources.filter((resource) => resource.kind === "Namespace"),
    ).toHaveLength(1);
    expect(
      resources.filter((resource) => resource.kind === "PersistentVolumeClaim"),
    ).toHaveLength(1);
    expect(
      resources.filter((resource) => resource.kind === "StorageClass"),
    ).toHaveLength(1);
    expect(
      resources.filter((resource) => resource.kind === "Deployment"),
    ).toHaveLength(2);
    expect(
      resources.filter((resource) => resource.kind === "Service"),
    ).toHaveLength(1);
    const secret = resources.find((resource) => resource.kind === "Secret");
    expect(secret?.metadata?.name).toBe("app-env");
    const deployment = resources.find(
      (resource) =>
        resource.kind === "Deployment" && resource.metadata?.name === "app",
    ) as V1Deployment | undefined;
    const checksum =
      deployment?.spec?.template?.metadata?.annotations?.[
        "kuber.astrxl.dev/env-checksum"
      ];
    expect(checksum).toMatch(/^[a-f0-9]{64}$/);

    const changedResources = await composeToKubernetes(
      "project",
      compose,
      process.cwd(),
      { app: { GENERATED: "changed" } },
    );
    const changedDeployment = changedResources.find(
      (resource) =>
        resource.kind === "Deployment" && resource.metadata?.name === "app",
    ) as V1Deployment | undefined;
    expect(
      changedDeployment?.spec?.template?.metadata?.annotations?.[
        "kuber.astrxl.dev/env-checksum"
      ],
    ).not.toBe(checksum);
  });

  test("renders protected routes with normalized, deduplicated paths", async () => {
    const compose = {
      services: {
        app: {
          image: "app",
          ports: ["app.example.com:3000:protected(api,/admin,api)"],
        },
      },
    } as ComposeSpecification;
    const resources = await composeToKubernetes("project", compose);
    const route = resources.find(
      (resource) => resource.kind === "IngressRoute",
    ) as
      | ((typeof resources)[number] & {
          spec?: { routes?: { match: string }[] };
        })
      | undefined;
    expect(route?.spec?.routes?.map((entry) => entry.match)).toEqual([
      "Host(`app.example.com`) && PathPrefix(`/api`)",
      "Host(`app.example.com`) && PathPrefix(`/admin`)",
    ]);
    expect(resources.some((resource) => resource.kind === "Ingress")).toBe(
      false,
    );
  });
});