// bin/version-mismatch.test.ts
import { describe, expect, test } from "bun:test";
import { detectPlatformBinaryMismatch } from "./version-mismatch.js";

describe("detectPlatformBinaryMismatch", () => {
  test("returns null when main and platform versions match", () => {
    // #given identical main and platform binary versions
    const input = { mainVersion: "4.5.1", platformVersion: "4.5.1", platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then no mismatch is reported
    expect(result).toBeNull();
  });

  test("reports mismatch when platform version is older than main", () => {
    // #given main package newer than installed platform binary (issue #3918 case)
    const input = { mainVersion: "4.5.1", platformVersion: "3.9.0", platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then mismatch object is returned with both versions
    expect(result).toEqual({
      mainVersion: "4.5.1",
      platformVersion: "3.9.0",
      platformPackage: "oh-my-opencode-windows-x64",
    });
  });

  test("reports mismatch when platform version is newer than main", () => {
    // #given platform binary newer than main wrapper
    const input = { mainVersion: "4.0.0", platformVersion: "4.5.1", platformPackage: "oh-my-opencode-linux-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then mismatch is still reported (any difference is a mismatch)
    expect(result).not.toBeNull();
    expect(result?.platformVersion).toBe("4.5.1");
  });

  test("returns null when main version is unknown", () => {
    // #given main version could not be read
    const input = { mainVersion: null, platformVersion: "4.5.1", platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then no mismatch is reported - cannot compare without main version
    expect(result).toBeNull();
  });

  test("returns null when platform version is unknown", () => {
    // #given platform package.json could not be read
    const input = { mainVersion: "4.5.1", platformVersion: null, platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then no mismatch is reported - silently skip rather than alarm
    expect(result).toBeNull();
  });

  test("reports mismatch when main is a prerelease and platform is the matching stable", () => {
    // #given prerelease main against stable platform binary - the publish workflow
    // ships prereleases under the `next` dist-tag, so this combo is a real
    // mismatch the wrapper would silently honour
    const input = { mainVersion: "4.5.1-beta.1", platformVersion: "4.5.1", platformPackage: "oh-my-opencode-darwin-arm64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then mismatch is reported with the full prerelease string preserved
    expect(result).toEqual({
      mainVersion: "4.5.1-beta.1",
      platformVersion: "4.5.1",
      platformPackage: "oh-my-opencode-darwin-arm64",
    });
  });

  test("reports mismatch between two different prerelease iterations", () => {
    // #given two different prerelease iterations - publish.yml allows multiple
    // beta builds on the `next` dist-tag, so beta.1 vs beta.2 IS a mismatch
    const input = { mainVersion: "4.5.1-beta.2", platformVersion: "4.5.1-beta.1", platformPackage: "oh-my-opencode-linux-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then mismatch is reported with both prerelease tags preserved
    expect(result).toEqual({
      mainVersion: "4.5.1-beta.2",
      platformVersion: "4.5.1-beta.1",
      platformPackage: "oh-my-opencode-linux-x64",
    });
  });

  test("returns null when both versions are the exact same prerelease", () => {
    // #given matched prereleases on both sides
    const input = { mainVersion: "4.5.1-beta.1", platformVersion: "4.5.1-beta.1", platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then no mismatch is reported
    expect(result).toBeNull();
  });

  test("normalizes leading 'v' so 'v4.5.1' matches '4.5.1'", () => {
    // #given the same version with and without a leading "v"
    const input = { mainVersion: "v4.5.1", platformVersion: "4.5.1", platformPackage: "oh-my-opencode-windows-x64" };

    // #when detecting mismatch
    const result = detectPlatformBinaryMismatch(input);

    // #then leading "v" is treated as cosmetic, no mismatch reported
    expect(result).toBeNull();
  });
});