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

import {
  classifyObjectSchemaChange,
  isVersionCompatible,
  parseNumericVersion,
  verifyCompatibilityTuple,
} from "../../src/application/policies/compatibility.ts";

describe("contract compatibility", () => {
  it("uses numeric version parsing rather than lexical comparison", () => {
    expect(parseNumericVersion("1.10.0")).toEqual({ major: 1, minor: 10, patch: 0 });
    expect(isVersionCompatible("1.9", "1.10")).toBe(true);
    expect(isVersionCompatible("1.9", "2.0")).toBe(false);
    expect(isVersionCompatible("next", "1.0")).toBe(false);
  });

  it("distinguishes additive and breaking object changes", () => {
    const base = { required: ["id"], properties: { id: {} } };
    expect(
      classifyObjectSchemaChange(base, {
        required: ["id"],
        properties: { id: {}, name: {} },
      }),
    ).toBe("additive");
    expect(
      classifyObjectSchemaChange(base, {
        required: ["id", "name"],
        properties: { id: {}, name: {} },
      }),
    ).toBe("breaking");
  });

  it("treats release ID mismatch as a warning when the blocking tuple is coherent", () => {
    const frontend = {
      buildId: "build-a",
      configSchemaVersion: "1.0",
      apiContractVersion: "1.0",
      assetManifestHash: "hash-a",
      releaseId: "release-a",
    };
    expect(
      verifyCompatibilityTuple({
        frontend,
        runtime: { ...frontend, releaseId: "release-b" },
      }),
    ).toEqual({
      compatible: true,
      mismatches: [],
      warnings: ["releaseId"],
    });
  });

  it("blocks mixed build, config, API, or asset tuples", () => {
    const frontend = {
      buildId: "build-a",
      configSchemaVersion: "1.0",
      apiContractVersion: "1.0",
      assetManifestHash: "hash-a",
      releaseId: "release-a",
    };
    expect(
      verifyCompatibilityTuple({
        frontend,
        runtime: {
          ...frontend,
          buildId: "build-b",
          configSchemaVersion: "2.0",
          assetManifestHash: "hash-b",
        },
      }),
    ).toMatchObject({
      compatible: false,
      mismatches: ["buildId", "configSchemaVersion", "assetManifestHash"],
    });
  });
});