import { requestJson } from "@/lib/httpJson";
import { browserCacheBuster, createUncachedUrl, releaseMetadataRequestInit } from "@/lib/releaseMetadataRequest";

export type LatestReleaseInfo = {
  version: string;
  notes?: string;
  pub_date?: string;
};

type GitHubLatestRelease = {
  tag_name: string;
  body: string | null;
  published_at: string | null;
};

const LATEST_RELEASE_URL = "https://dl.dbxio.com/releases/latest/latest.json";
const GITHUB_LATEST_RELEASE_URL = "https://api.github.com/repos/t8y2/dbx/releases/latest";

function normalizeVersion(version: string) {
  return version.replace(/^v/, "");
}

export async function fetchLatestReleaseInfo(): Promise<LatestReleaseInfo | null> {
  if (typeof window !== "undefined") {
    return fetchGitHubLatestReleaseInfo();
  }

  try {
    const release = await requestJson<LatestReleaseInfo>(createUncachedUrl(LATEST_RELEASE_URL, browserCacheBuster()), releaseMetadataRequestInit());
    return release.version ? { ...release, version: normalizeVersion(release.version) } : null;
  } catch {
    return fetchGitHubLatestReleaseInfo();
  }
}

export async function fetchGitHubLatestReleaseInfo(): Promise<LatestReleaseInfo | null> {
  try {
    const release = await requestJson<GitHubLatestRelease>(createUncachedUrl(GITHUB_LATEST_RELEASE_URL, browserCacheBuster()), releaseMetadataRequestInit({ headers: { Accept: "application/vnd.github+json" } }));

    return {
      version: normalizeVersion(release.tag_name),
      notes: release.body || undefined,
      pub_date: release.published_at || undefined,
    };
  } catch {
    return null;
  }
}