import { describe, expect, it } from "vitest";
import {
  resolveLocalVitestEnv,
  resolveLocalFullSuiteProfile,
  resolveLocalVitestScheduling,
  shouldUseLargeLocalFullSuiteProfile,
} from "../../scripts/lib/vitest-local-scheduling.mjs";

describe("vitest local full-suite profile", () => {
  it("forces local Vitest runs back onto local-check policy", () => {
    expect(resolveLocalVitestEnv({ OPENCLAW_LOCAL_CHECK: "0", PATH: "/usr/bin" })).toEqual({
      OPENCLAW_LOCAL_CHECK: "1",
      PATH: "/usr/bin",
    });
    expect(resolveLocalVitestEnv({ OPENCLAW_LOCAL_CHECK: "false", PATH: "/usr/bin" })).toEqual({
      OPENCLAW_LOCAL_CHECK: "1",
      PATH: "/usr/bin",
    });
  });

  it("keeps local-check disablement for CI Vitest runs", () => {
    expect(
      resolveLocalVitestEnv({
        CI: "true",
        OPENCLAW_LOCAL_CHECK: "0",
        PATH: "/usr/bin",
      }),
    ).toEqual({
      CI: "true",
      OPENCLAW_LOCAL_CHECK: "0",
      PATH: "/usr/bin",
    });
  });

  it("selects the large local profile on roomy hosts that are not throttled", () => {
    const env = {};
    const hostInfo = {
      cpuCount: 14,
      loadAverage1m: 0,
      totalMemoryBytes: 48 * 1024 ** 3,
    };

    expect(resolveLocalVitestScheduling(env, hostInfo, "threads")).toEqual({
      maxWorkers: 6,
      fileParallelism: true,
      throttledBySystem: false,
    });
    expect(shouldUseLargeLocalFullSuiteProfile(env, hostInfo)).toBe(true);
    expect(resolveLocalFullSuiteProfile(env, hostInfo)).toEqual({
      shardParallelism: 10,
      vitestMaxWorkers: 2,
    });
  });

  it("keeps the smaller local profile when the host is already throttled", () => {
    const hostInfo = {
      cpuCount: 14,
      loadAverage1m: 14,
      totalMemoryBytes: 48 * 1024 ** 3,
      freeMemoryBytes: 32 * 1024 ** 3,
    };

    expect(shouldUseLargeLocalFullSuiteProfile({}, hostInfo)).toBe(false);
    expect(resolveLocalFullSuiteProfile({}, hostInfo)).toEqual({
      shardParallelism: 4,
      vitestMaxWorkers: 1,
    });
  });

  it("never selects the large local profile in CI", () => {
    const hostInfo = {
      cpuCount: 14,
      loadAverage1m: 0,
      totalMemoryBytes: 48 * 1024 ** 3,
    };

    expect(shouldUseLargeLocalFullSuiteProfile({ CI: "true" }, hostInfo)).toBe(false);
    expect(resolveLocalFullSuiteProfile({ CI: "true" }, hostInfo)).toEqual({
      shardParallelism: 4,
      vitestMaxWorkers: 1,
    });
  });

  it("serializes local full-suite shards under critical memory pressure", () => {
    const hostInfo = {
      cpuCount: 10,
      loadAverage1m: 0,
      totalMemoryBytes: 24 * 1024 ** 3,
      freeMemoryBytes: 3 * 1024 ** 3,
    };

    expect(resolveLocalVitestScheduling({}, hostInfo, "threads")).toEqual({
      maxWorkers: 1,
      fileParallelism: false,
      throttledBySystem: true,
    });
    expect(resolveLocalFullSuiteProfile({}, hostInfo)).toEqual({
      shardParallelism: 1,
      vitestMaxWorkers: 1,
    });
  });

  it("limits local full-suite shards when memory is tight", () => {
    const hostInfo = {
      cpuCount: 10,
      loadAverage1m: 0,
      totalMemoryBytes: 24 * 1024 ** 3,
      freeMemoryBytes: 6 * 1024 ** 3,
    };

    expect(resolveLocalVitestScheduling({}, hostInfo, "threads")).toEqual({
      maxWorkers: 2,
      fileParallelism: true,
      throttledBySystem: true,
    });
    expect(resolveLocalFullSuiteProfile({}, hostInfo)).toEqual({
      shardParallelism: 2,
      vitestMaxWorkers: 1,
    });
  });

  it("lets explicit system throttle opt-out ignore memory pressure", () => {
    const env = { OPENCLAW_VITEST_DISABLE_SYSTEM_THROTTLE: "1" };
    const hostInfo = {
      cpuCount: 10,
      loadAverage1m: 0,
      totalMemoryBytes: 24 * 1024 ** 3,
      freeMemoryBytes: 3 * 1024 ** 3,
    };

    expect(resolveLocalVitestScheduling(env, hostInfo, "threads")).toEqual({
      maxWorkers: 4,
      fileParallelism: true,
      throttledBySystem: false,
    });
    expect(resolveLocalFullSuiteProfile(env, hostInfo)).toEqual({
      shardParallelism: 4,
      vitestMaxWorkers: 1,
    });
  });
});