import { describe, expect, it } from "vitest";

import {
  createStackConfig,
  formatServiceLogs,
  getDefaultTemporalCandidates,
  getServiceCommandMatchers,
  isServiceHealthy,
  isServiceProcessMatch,
  resolveTemporalCli,
  selectServicesForLogs,
} from "../../scripts/dev-stack/stack.mjs";

type StackService = ReturnType<typeof createStackConfig>["services"][number];

describe("createStackConfig", () => {
  it("derives frontend and sibling backend paths from the workspace root", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");

    expect(config.frontendRoot).toBe("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");
    expect(config.backendRoot).toBe("/Volumes/DockCase/codes/auto-virtual-tryon");
    expect(config.runtimeRoot).toBe(
      "/Volumes/DockCase/codes/auto-virtual-tryon-frontend/.dev-stack",
    );
    expect(config.temporalDatabaseFile).toBe(
      "/Volumes/DockCase/codes/auto-virtual-tryon-frontend/.dev-stack/temporal-cli-dev.db",
    );
  });

  it("builds the expected service commands", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");

    expect(config.services).toEqual([
      {
        key: "temporal",
        cwd: "/Volumes/DockCase/codes/auto-virtual-tryon-frontend/.dev-stack",
        port: 7233,
        command: [
          "__TEMPORAL_CLI__",
          "server",
          "start-dev",
          "--ip",
          "127.0.0.1",
          "--port",
          "7233",
          "--headless",
          "--db-filename",
          "/Volumes/DockCase/codes/auto-virtual-tryon-frontend/.dev-stack/temporal-cli-dev.db",
        ],
      },
      {
        key: "backend-api",
        cwd: "/Volumes/DockCase/codes/auto-virtual-tryon",
        port: 8000,
        command: [
          "/Volumes/DockCase/codes/auto-virtual-tryon/.venv/bin/python",
          "-m",
          "uvicorn",
          "app.main:app",
          "--host",
          "127.0.0.1",
          "--port",
          "8000",
        ],
      },
      {
        key: "backend-worker",
        cwd: "/Volumes/DockCase/codes/auto-virtual-tryon",
        port: null,
        command: [
          "/Volumes/DockCase/codes/auto-virtual-tryon/.venv/bin/python",
          "-m",
          "app.workers.runner",
        ],
      },
      {
        key: "frontend",
        cwd: "/Volumes/DockCase/codes/auto-virtual-tryon-frontend",
        port: 3000,
        command: [
          "/Volumes/DockCase/codes/auto-virtual-tryon-frontend/node_modules/.bin/next",
          "dev",
          "--hostname",
          "127.0.0.1",
          "--port",
          "3000",
        ],
      },
    ]);
  });
});

describe("resolveTemporalCli", () => {
  it("prefers a CLI already available on PATH", () => {
    const resolved = resolveTemporalCli({
      pathLookupResult: "/usr/local/bin/temporal",
      candidatePaths: ["/tmp/temporal-sdk-python-1.24.0"],
      existingPaths: new Set(["/usr/local/bin/temporal", "/tmp/temporal-sdk-python-1.24.0"]),
    });

    expect(resolved).toBe("/usr/local/bin/temporal");
  });

  it("falls back to a downloaded SDK binary when PATH does not contain temporal", () => {
    const resolved = resolveTemporalCli({
      pathLookupResult: null,
      candidatePaths: ["/tmp/temporal-sdk-python-1.24.0", "/tmp/temporal-cli"],
      existingPaths: new Set(["/tmp/temporal-sdk-python-1.24.0"]),
    });

    expect(resolved).toBe("/tmp/temporal-sdk-python-1.24.0");
  });

  it("returns null when no temporal binary is available", () => {
    const resolved = resolveTemporalCli({
      pathLookupResult: null,
      candidatePaths: ["/tmp/temporal-sdk-python-1.24.0"],
      existingPaths: new Set<string>(),
    });

    expect(resolved).toBeNull();
  });
});

describe("getDefaultTemporalCandidates", () => {
  it("includes the known SDK cache binary names under the temp directory", () => {
    expect(getDefaultTemporalCandidates("/var/folders/example/T")).toEqual([
      "/var/folders/example/T/temporal-sdk-python-1.24.0",
      "/var/folders/example/T/temporal-sdk-python-1.25.0",
      "/var/folders/example/T/temporal-sdk-python-1.26.0",
      "/var/folders/example/T/temporal-cli",
    ]);
  });
});

describe("selectServicesForLogs", () => {
  it("returns every service when no filter is provided", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");

    expect(
      selectServicesForLogs(config.services, null).map((service: { key: string }) => service.key),
    ).toEqual(["temporal", "backend-api", "backend-worker", "frontend"]);
  });

  it("filters to a single service key", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");

    expect(
      selectServicesForLogs(config.services, "frontend").map((service: { key: string }) => service.key),
    ).toEqual(["frontend"]);
  });

  it("throws a helpful error for an unknown service", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");

    expect(() => selectServicesForLogs(config.services, "foo")).toThrow(
      "Unknown service \"foo\". Expected one of: temporal, backend-api, backend-worker, frontend",
    );
  });
});

describe("formatServiceLogs", () => {
  it("formats sections with stable headers and preserves line order", () => {
    const output = formatServiceLogs([
      {
        key: "frontend",
        logFilePath: "/tmp/frontend.log",
        lines: ["> dev", "ready"],
      },
      {
        key: "backend-api",
        logFilePath: "/tmp/backend-api.log",
        lines: [],
      },
    ]);

    expect(output).toBe(
      [
        "--- frontend (/tmp/frontend.log) ---",
        "> dev",
        "ready",
        "",
        "--- backend-api (/tmp/backend-api.log) ---",
        "(log file is empty)",
      ].join("\n"),
    );
  });
});

describe("service process matching", () => {
  it("does not treat an unrelated process with a reused pid as the frontend service", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");
    const frontend = config.services.find((service: StackService) => service.key === "frontend");

    expect(frontend).toBeDefined();
    expect(
      isServiceProcessMatch(frontend!, "node /tmp/unrelated-script.js --watch"),
    ).toBe(false);
  });

  it("builds stable command matchers for backend api and worker processes", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");
    const backendApi = config.services.find((service: StackService) => service.key === "backend-api");
    const backendWorker = config.services.find((service: StackService) => service.key === "backend-worker");

    expect(getServiceCommandMatchers(backendApi!)).toEqual(["uvicorn", "app.main:app"]);
    expect(getServiceCommandMatchers(backendWorker!)).toEqual(["app.workers.runner"]);
  });

  it("requires the expected port to be open for port-bound services", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");
    const backendApi = config.services.find((service: StackService) => service.key === "backend-api");

    expect(
      isServiceHealthy(backendApi!, {
        pid: 123,
        processCommand: "/path/to/python -m uvicorn app.main:app --host 127.0.0.1 --port 8000",
        portOpen: false,
      }),
    ).toBe(false);
  });

  it("allows worker services without ports when the process command matches", () => {
    const config = createStackConfig("/Volumes/DockCase/codes/auto-virtual-tryon-frontend");
    const backendWorker = config.services.find((service: StackService) => service.key === "backend-worker");

    expect(
      isServiceHealthy(backendWorker!, {
        pid: 123,
        processCommand: "/path/to/python -m app.workers.runner",
        portOpen: false,
      }),
    ).toBe(true);
  });
});