import { describe, expect, test } from "bun:test";
import {
  HYSTERIA_LINUX_AMD64_ASSET,
  compareVersionParts,
  parseAppTag,
  parseVersion,
  renderLockEnv,
  selectLatestStableRelease,
  selectLinuxAmd64Asset,
  selectReleaseByVersion,
  type GithubRelease
} from "../src/build/hysteriaRelease";

/** Upstream отдаёт URL с неэкранированным слэшем в теге; берём его как есть. */
function assetUrl(tag: string): string {
  return `https://github.com/HyNetworks/hysteria/releases/download/${tag}/${HYSTERIA_LINUX_AMD64_ASSET}`;
}

function release(tag: string, overrides: Partial<GithubRelease> = {}): GithubRelease {
  return {
    tag_name: tag,
    draft: false,
    prerelease: false,
    published_at: "2026-08-23T00:59:00Z",
    assets: [{ name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: assetUrl(tag) }],
    ...overrides
  };
}

/** Реалистичная выборка: stable, prerelease, draft, чужие семейства тегов. */
const UPSTREAM_FIXTURE: GithubRelease[] = [
  release("app/v2.13.0-rc1", { prerelease: true }),
  release("app/v2.13.0", { prerelease: true }),
  release("app/v2.14.0", { draft: true }),
  release("app/v2.12.2"),
  release("app/v2.12.1"),
  release("app/v2.9.10"),
  release("app/v2.9.2"),
  release("core/v2.12.2"),
  release("docs/v1.0.0"),
  release("v2.12.2")
];

describe("selectLatestStableRelease", () => {
  test("выбирает последнюю стабильную app-версию", () => {
    const resolved = selectLatestStableRelease(UPSTREAM_FIXTURE);
    expect(resolved.version).toBe("v2.12.2");
    expect(resolved.tag).toBe("app/v2.12.2");
  });

  test("игнорирует prerelease", () => {
    const resolved = selectLatestStableRelease([release("app/v2.12.2"), release("app/v2.13.0", { prerelease: true })]);
    expect(resolved.version).toBe("v2.12.2");
  });

  test("игнорирует draft", () => {
    const resolved = selectLatestStableRelease([release("app/v2.12.2"), release("app/v2.13.0", { draft: true })]);
    expect(resolved.version).toBe("v2.12.2");
  });

  test("игнорирует чужие семейства тегов", () => {
    const resolved = selectLatestStableRelease([release("core/v9.9.9"), release("app/v2.12.2")]);
    expect(resolved.version).toBe("v2.12.2");
  });

  test("игнорирует тег без префикса app/", () => {
    expect(() => selectLatestStableRelease([release("v2.12.2")])).toThrow(/no stable/);
  });

  test("сравнение числовое, а не лексикографическое", () => {
    const resolved = selectLatestStableRelease([release("app/v2.9.2"), release("app/v2.9.10")]);
    expect(resolved.version).toBe("v2.9.10");
  });

  test("порядок элементов в ответе API не влияет на результат", () => {
    const reversed = [...UPSTREAM_FIXTURE].reverse();
    expect(selectLatestStableRelease(reversed).version).toBe("v2.12.2");
  });

  test("невалидный semver в теге отбрасывается", () => {
    expect(() => selectLatestStableRelease([release("app/v2.12"), release("app/vNEXT")])).toThrow(
      /no stable/
    );
  });

  test("пустой список релизов даёт понятную ошибку", () => {
    expect(() => selectLatestStableRelease([])).toThrow(/no stable/);
  });

  test("берёт browser_download_url ровно как отдал API, без пересборки строки", () => {
    const resolved = selectLatestStableRelease(UPSTREAM_FIXTURE);
    expect(resolved.artifactUrl).toBe(
      "https://github.com/HyNetworks/hysteria/releases/download/app/v2.12.2/hysteria-linux-amd64"
    );
  });

  test("процентное кодирование в url upstream не переписывается", () => {
    const encoded = "https://github.com/HyNetworks/hysteria/releases/download/app%2Fv2.12.2/hysteria-linux-amd64";
    const resolved = selectLatestStableRelease([
      release("app/v2.12.2", {
        assets: [{ name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: encoded }]
      })
    ]);
    expect(resolved.artifactUrl).toBe(encoded);
  });
});

describe("selectLinuxAmd64Asset", () => {
  test("отсутствующий linux-amd64 asset — ошибка", () => {
    const broken = release("app/v2.12.2", {
      assets: [{ name: "hysteria-linux-arm64", browser_download_url: assetUrl("app/v2.12.2") }]
    });
    expect(() => selectLatestStableRelease([broken])).toThrow(/has no hysteria-linux-amd64 asset/);
  });

  test("дублирующийся asset — ошибка, а не случайный выбор", () => {
    const ambiguous = release("app/v2.12.2", {
      assets: [
        { name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: assetUrl("app/v2.12.2") },
        { name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: "https://example.com/evil" }
      ]
    });
    expect(() => selectLatestStableRelease([ambiguous])).toThrow(/ambiguous/);
  });

  test("non-https url отклоняется", () => {
    const insecure = release("app/v2.12.2", {
      assets: [{ name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: "http://github.com/x" }]
    });
    expect(() => selectLinuxAmd64Asset(insecure)).toThrow(/not https/);
  });

  test("пустой url отклоняется", () => {
    const empty = release("app/v2.12.2", {
      assets: [{ name: HYSTERIA_LINUX_AMD64_ASSET, browser_download_url: "" }]
    });
    expect(() => selectLinuxAmd64Asset(empty)).toThrow(/empty asset download url/);
  });

  test("частичное совпадение имени asset не принимается", () => {
    const partial = release("app/v2.12.2", {
      assets: [
        { name: "hysteria-linux-amd64-avx", browser_download_url: assetUrl("app/v2.12.2") }
      ]
    });
    expect(() => selectLinuxAmd64Asset(partial)).toThrow(/has no hysteria-linux-amd64 asset/);
  });
});

describe("selectReleaseByVersion", () => {
  test("находит явно запрошенную версию, даже если она не последняя", () => {
    const resolved = selectReleaseByVersion(UPSTREAM_FIXTURE, "v2.12.1");
    expect(resolved.version).toBe("v2.12.1");
    expect(resolved.tag).toBe("app/v2.12.1");
  });

  test("позволяет осознанно закрепить prerelease по явному запросу", () => {
    const resolved = selectReleaseByVersion(UPSTREAM_FIXTURE, "v2.13.0");
    expect(resolved.tag).toBe("app/v2.13.0");
    // при этом автоматический выбор её по-прежнему не берёт
    expect(selectLatestStableRelease(UPSTREAM_FIXTURE).version).toBe("v2.12.2");
  });

  test("draft по явному запросу отклоняется", () => {
    expect(() => selectReleaseByVersion(UPSTREAM_FIXTURE, "v2.14.0")).toThrow(/draft release/);
  });

  test("несуществующая версия даёт ошибку", () => {
    expect(() => selectReleaseByVersion(UPSTREAM_FIXTURE, "v9.9.9")).toThrow(/was not found/);
  });

  test("невалидный формат override отклоняется", () => {
    for (const bad of ["2.12.2", "v2.12", "latest", ""]) {
      expect(() => selectReleaseByVersion(UPSTREAM_FIXTURE, bad)).toThrow(/invalid Hysteria version override/);
    }
  });
});

describe("парсинг версий", () => {
  test("parseAppTag", () => {
    expect(parseAppTag("app/v2.12.2")?.version).toBe("v2.12.2");
    expect(parseAppTag(" app/v2.12.2 ")?.version).toBe("v2.12.2");
    expect(parseAppTag("app/v2.12.2-rc1")).toBeNull();
    expect(parseAppTag("app/2.12.2")).toBeNull();
  });

  test("parseVersion", () => {
    expect(parseVersion("v2.12.2")).toEqual([2, 12, 2]);
    expect(parseVersion("v2.12.2-rc1")).toBeNull();
  });

  test("compareVersionParts", () => {
    expect(compareVersionParts([2, 12, 2], [2, 12, 1])).toBe(1);
    expect(compareVersionParts([2, 9, 10], [2, 9, 2])).toBe(1);
    expect(compareVersionParts([2, 12, 2], [2, 12, 2])).toBe(0);
    expect(compareVersionParts([1, 99, 99], [2, 0, 0])).toBe(-1);
  });
});

describe("renderLockEnv", () => {
  const resolved = selectLatestStableRelease(UPSTREAM_FIXTURE);
  const sha = "a".repeat(64);

  test("содержит замороженные версию, url и sha256", () => {
    const rendered = renderLockEnv(resolved, sha, "latest-stable", "2026-08-27T00:00:00Z");
    expect(rendered).toContain("HYSTERIA_VERSION=v2.12.2");
    expect(rendered).toContain(`HYSTERIA_ARTIFACT_URL=${resolved.artifactUrl}`);
    expect(rendered).toContain(`HYSTERIA_ARTIFACT_SHA256=${sha}`);
    expect(rendered).toContain("HYSTERIA_RESOLUTION=latest-stable");
    expect(rendered).toContain("HYSTERIA_RESOLVED_AT=2026-08-27T00:00:00Z");
  });

  test("невалидный sha256 отклоняется", () => {
    for (const bad of ["", "abc", "replace-with-real-sha256", "A".repeat(64), "z".repeat(64)]) {
      expect(() => renderLockEnv(resolved, bad, "latest-stable", "2026-08-27T00:00:00Z")).toThrow(
        /invalid Hysteria artifact sha256/
      );
    }
  });
});