import { execSync } from "child_process";
import envCi from "env-ci";

export function inferBuildInfo({ baseBranch }: { baseBranch?: string } = {}) {
  const ciEnv = envCi();

  let repoName, repoOwner, commitHash, commitBranch, buildTitle;

  if (ciEnv.slug) {
    const slugParts = ciEnv.slug.split("/");
    if (slugParts.length === 2) {
      repoOwner = slugParts[0];
      repoName = slugParts[1];
    }
  }

  let ciEnvCommitBranch = ciEnv.isPr ? ciEnv.prBranch : ciEnv.branch;
  if (ciEnv.commit) {
    commitHash = ciEnv.commit;
  }
  if (ciEnvCommitBranch) {
    commitBranch = ciEnvCommitBranch;
  }
  if (!baseBranch && ciEnv.isPr && ciEnv.branch) {
    baseBranch = ciEnv.branch;
  }
  if (ciEnv.isCi && commitHash) {
    try {
      const output = execSync(
        `git log --format=oneline -n 1 ${commitHash}`,
      ).toString();
      const commitHashRegex = /[0-9a-z]{20}[0-9a-z]+/;
      if (commitHashRegex.test(output)) {
        const commitMessage = output.replace(commitHashRegex, "").trim();
        buildTitle = commitMessage;
      }
    } catch (err: any) {} // eslint-disable-line @typescript-eslint/no-unused-vars
  }

  return {
    repoName,
    repoOwner,
    commitHash,
    commitBranch,
    buildTitle,
  };
}