import { describe, expect, it, vi } from "vitest";
import { giteaMergeCompatibility } from "../src/integrations/gitea/compatibility.js";
import { GiteaClient } from "../src/integrations/gitea/client.js";

describe("upstream Gitea merge negotiation", () => {
  it.each(["28.0.0", "v28.0.0", "28.0.0+gitea.build-123", " v1.27.3+build.42 ", "1.25.0"])("accepts attested stable version %s", (value) => {
    expect(giteaMergeCompatibility(value)).toMatchObject({ supported: true });
  });
  it.each([undefined, null, {}, 28, "", "1.24.9", "29.0.0", "2.0.0", "28.0", "028.0.0", "28.0.0+", "28.0.0+bad/metadata", "28.0.0-rc.1", "28.0.0-garbage suffix", "28.0.0+" + "a".repeat(128)])("fails closed for %s", (value) => {
    expect(giteaMergeCompatibility(value).supported).toBe(false);
  });
  it("does not accept a connector version in place of the upstream version", async () => {
    const fetcher = vi.fn(async () => new Response(JSON.stringify({ connectorVersion: "28.0.0", version: "1.24.9" })));
    const client = new GiteaClient("https://gitea.example.com", "test-token", fetcher as typeof fetch);
    expect(await client.getUpstreamCompatibility()).toMatchObject({ supported: false, source: "upstream:/api/v1/version", normalizedVersion: "1.24.9" });
  });
  it("uses current upstream 28 when connector build is 1.14", async () => {
    const fetcher = vi.fn(async () => new Response(JSON.stringify({ connectorVersion: "1.14.0", version: "28.0.0" })));
    const client = new GiteaClient("https://gitea.example.com", "test-token", fetcher as typeof fetch);
    expect(await client.getUpstreamCompatibility()).toMatchObject({ supported: true, normalizedVersion: "28.0.0", strategyKey: "do" });
  });
  it("re-negotiates before each merge and blocks an unsupported server upgrade", async () => {
    let version = "28.0.0";
    let writes = 0;
    const fetcher = vi.fn(async (input: string | URL | Request) => {
      if (String(input).endsWith("/version")) return new Response(JSON.stringify({ version }));
      writes += 1;
      return new Response(null, { status: 204 });
    });
    const client = new GiteaClient("https://gitea.example.com", "test-token", fetcher as typeof fetch);
    await client.mergePullRequest("Jens", "canary", 1, { method: "squash", headCommitId: "a".repeat(40) });
    version = "29.0.0";
    await expect(client.mergePullRequest("Jens", "canary", 1, { method: "squash", headCommitId: "a".repeat(40) })).rejects.toMatchObject({ code: "GITEA_VERSION_UNSUPPORTED" });
    expect(writes).toBe(1);
  });
});