/**
 * Tests for the update decision logic.
 *
 * TRACES: | DR-217 | UT-208
 *
 * The pure half is tested here; `checkForUpdate`/`installUpdate` talk to the
 * plugin and are exercised by actually cutting a release (see the Phase 3
 * verification steps in docs/build/ci-operations.md).
 */

import { describe, it, expect } from "vitest";
import { decideUpdateAction, isNewerVersion, updateCapability, RELEASES_URL } from "./updateCheck";

describe("isNewerVersion", () => {
  it("compares each numeric field in order", () => {
    expect(isNewerVersion("0.9.2", "0.9.1")).toBe(true);
    expect(isNewerVersion("0.10.0", "0.9.9")).toBe(true);
    expect(isNewerVersion("1.0.0", "0.99.99")).toBe(true);
    expect(isNewerVersion("0.9.1", "0.9.2")).toBe(false);
  });

  it("does not offer the version already installed", () => {
    expect(isNewerVersion("0.9.1", "0.9.1")).toBe(false);
  });

  it("tolerates a leading v, which is how the tags are written", () => {
    // build-release.yml derives VERSION from refs/tags/v0.9.1.
    expect(isNewerVersion("v0.9.2", "0.9.1")).toBe(true);
    expect(isNewerVersion("0.9.2", "v0.9.1")).toBe(true);
  });

  it("sorts a pre-release below the release of the same number", () => {
    // Otherwise everyone on 0.9.2 gets offered 0.9.2-rc1 as an "upgrade" —
    // build-release.yml marks exactly these suffixes as prereleases.
    expect(isNewerVersion("0.9.2-rc1", "0.9.2")).toBe(false);
    expect(isNewerVersion("0.9.2", "0.9.2-rc1")).toBe(true);
    expect(isNewerVersion("0.9.2-rc1", "0.9.1")).toBe(true);
  });

  it("treats a missing patch field as zero rather than NaN", () => {
    expect(isNewerVersion("1.0", "0.9.9")).toBe(true);
    expect(isNewerVersion("0.9", "0.9.1")).toBe(false);
  });
});

describe("updateCapability", () => {
  it("reports install for the desktop platforms", () => {
    expect(updateCapability("linux")).toBe("install");
    expect(updateCapability("windows")).toBe("install");
    expect(updateCapability("macos")).toBe("install");
  });

  it("reports link-only for mobile", () => {
    // tauri-plugin-updater is not compiled for Android at all: an app cannot
    // overwrite its own APK. Calling it there would throw, not degrade.
    expect(updateCapability("android")).toBe("link-only");
    expect(updateCapability("ios")).toBe("link-only");
  });
});

describe("decideUpdateAction", () => {
  it("offers nothing when the endpoint reported nothing", () => {
    expect(decideUpdateAction("linux", null)).toEqual({ kind: "none" });
    expect(decideUpdateAction("android", null)).toEqual({ kind: "none" });
  });

  it("offers a real install on desktop", () => {
    expect(decideUpdateAction("linux", { version: "0.9.2", notes: "fixes" })).toEqual({
      kind: "install",
      version: "0.9.2",
      notes: "fixes",
    });
  });

  it("normalises absent notes to null rather than undefined", () => {
    // The Svelte side renders `{#if notes}`; undefined vs null is the kind of
    // difference that only shows up as a blank panel in front of a user.
    expect(decideUpdateAction("windows", { version: "0.9.2" })).toEqual({
      kind: "install",
      version: "0.9.2",
      notes: null,
    });
  });

  it("offers the releases page on Android instead of an install", () => {
    expect(decideUpdateAction("android", { version: "0.9.2" })).toEqual({
      kind: "open-releases",
      version: "0.9.2",
      url: RELEASES_URL,
    });
  });

  it("points at Gitea, not GitHub", () => {
    // The release body used to link "GitHub Issues" on a Gitea-hosted project.
    expect(RELEASES_URL).toContain("gitea.tourolle.paris");
  });
});