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

import { classifyGateStepResult } from "../../scripts/lib/ci-step-result.ts";

describe("CI gate step result classification", () => {
  it("accepts a negative fixture only with its exact exit and diagnostic identity", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 2,
          expectedDiagnosticId: "error TS2322:",
        },
        {
          status: 2,
          signal: null,
          stdout: "fixture.ts(1,1): error TS2322: incompatible type\n",
          stderr: "",
        },
      ),
    ).toEqual({ kind: "EXPECTED_FAILURE", expectationMet: true });
  });

  it("rejects a negative fixture with the wrong non-zero exit code", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 2,
          expectedDiagnosticId: "error TS2322:",
        },
        {
          status: 1,
          signal: null,
          stdout: "fixture.ts(1,1): error TS2322: incompatible type\n",
          stderr: "",
        },
      ),
    ).toEqual({ kind: "UNEXPECTED_EXIT", expectationMet: false });
  });

  it("rejects a negative fixture without the exact case-sensitive diagnostic identity", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 2,
          expectedDiagnosticId: "error TS2322:",
        },
        {
          status: 2,
          signal: null,
          stdout: "fixture.ts(1,1): error ts2322: incompatible type\n",
          stderr: "",
        },
      ),
    ).toEqual({ kind: "UNEXPECTED_DIAGNOSTIC", expectationMet: false });
  });

  it("matches an exact diagnostic identity emitted on stderr", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 1,
          expectedDiagnosticId: "Risk coverage failed:",
        },
        {
          status: 1,
          signal: null,
          stdout: "",
          stderr: "Risk coverage failed:\n- expected fixture finding\n",
        },
      ),
    ).toEqual({ kind: "EXPECTED_FAILURE", expectationMet: true });
  });

  it.each(["ENOENT", "EACCES", "ETIMEDOUT", "ENOBUFS"])(
    "never treats spawn infrastructure error %s as an expected negative fixture",
    (code) => {
      expect(
        classifyGateStepResult(
          {
            kind: "fail",
            expectedExitCode: 1,
            expectedDiagnosticId: "fixture failed:",
          },
          {
            status: null,
            signal: null,
            stdout: "",
            stderr: "",
            error: { code },
          },
        ),
      ).toEqual({
        kind: "INFRASTRUCTURE_FAILURE",
        expectationMet: false,
        detail: code,
      });
    },
  );

  it("treats a code-less spawn error as infrastructure failure", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 1,
          expectedDiagnosticId: "fixture failed:",
        },
        {
          status: 1,
          signal: null,
          stdout: "",
          stderr: "fixture failed:\n",
          error: {},
        },
      ),
    ).toEqual({
      kind: "INFRASTRUCTURE_FAILURE",
      expectationMet: false,
      detail: "SPAWN_ERROR",
    });
  });

  it("treats a signal-terminated or status-less child as infrastructure failure", () => {
    expect(
      classifyGateStepResult(
        {
          kind: "fail",
          expectedExitCode: 1,
          expectedDiagnosticId: "fixture failed:",
        },
        {
          status: null,
          signal: "SIGTERM",
          stdout: "",
          stderr: "",
        },
      ),
    ).toEqual({
      kind: "INFRASTRUCTURE_FAILURE",
      expectationMet: false,
      detail: "SIGTERM",
    });
  });
});