const GithubClient = require('./githubClient');
const fs = require('fs');
const path = require('path');

const GRAFANA_ZABBIX_OWNER = 'alexanderzobnin';
const GRAFANA_ZABBIX_REPO = 'grafana-zabbix';

const github = new GithubClient(GRAFANA_ZABBIX_OWNER, GRAFANA_ZABBIX_REPO, true);

async function main() {
  const tag = process.env.CIRCLE_TAG;
  const tagRegex = /v[0-9]+(\.[0-9]+){2}(-.+|[^-.]*)/;
  if (!tagRegex.test(tag)) {
    console.error(`Release tag should has format v1.2.3[-meta], got ${tag}`);
    process.exit(1);
  }

  const releaseVersion = tag.slice(1);
  console.log('Release version', releaseVersion);

  const preRelease = /(alpha|beta)/.test(releaseVersion);

  let releaseId;
  try {
    const latestRelease = await github.client.get(`releases/tags/v${releaseVersion}`);
    releaseId = latestRelease.data.id;
  } catch (reason) {
    if (reason.response.status !== 404) {
      // 404 just means no release found. Not an error. Anything else though, re throw the error
      throw reason;
    }
  }

  if (!releaseId) {
    console.log('No release exist, finding a tag');
    let releaseCommitHash;
    try {
      const tags = await github.client.get(`tags`);
      const releaseTag = tags.data.find(t => t.name === `v${releaseVersion}`);
      releaseCommitHash = releaseTag.commit.sha;
      console.log('Tag found', releaseTag.name, releaseCommitHash);
    } catch (reason) {
      if (reason.response.status !== 404) {
        // 404 just means no release found. Not an error. Anything else though, re throw the error
        throw reason;
      } else {
        console.error('No release tag found');
        process.exit(1);
      }
    }

    try {
      const newReleaseResponse = await github.client.post('releases', {
        tag_name: `v${releaseVersion}`,
        target_commitish: releaseCommitHash,
        name: `${releaseVersion}`,
        body: `Grafana-Zabbix ${releaseVersion}`,
        draft: false,
        prerelease: preRelease,
      });

      releaseId = newReleaseResponse.data.id;
    } catch (reason) {
      throw reason;
    }
  }

  try {
    const updateReleaseResponse = await github.client.put(`releases/${releaseId}`, {
      tag_name: `v${releaseVersion}`,
      name: `${releaseVersion}`,
      body: `Grafana-Zabbix ${releaseVersion}`,
      draft: false,
      prerelease: preRelease,
    });

    await publishAssets(
      `./grafana-zabbix-${releaseVersion}.zip`,
      `https://uploads.github.com/repos/${GRAFANA_ZABBIX_OWNER}/${GRAFANA_ZABBIX_REPO}/releases/${updateReleaseResponse.data.id}/assets`
    );
  } catch (reason) {
    console.error(reason.data || reason.response || reason);
    // Rethrow the error so that we can trigger a non-zero exit code to circle-ci
    throw reason;
  }
}

async function publishAssets(fileName, destUrl) {
  // Add the assets. Loop through files in the ci/dist folder and upload each asset.

  const fileStat = fs.statSync(`${fileName}`);
  const fileData = fs.readFileSync(`${fileName}`);
  return await github.client.post(`${destUrl}?name=${fileName}`, fileData, {
    headers: {
      'Content-Type': resolveContentType(path.extname(fileName)),
      'Content-Length': fileStat.size,
    },
    maxContentLength: fileStat.size * 2 * 1024 * 1024,
  });
}

const resolveContentType = (extension) => {
  if (extension.startsWith('.')) {
    extension = extension.substr(1);
  }
  switch (extension) {
    case 'zip':
      return 'application/zip';
    case 'json':
      return 'application/json';
    case 'sha1':
      return 'text/plain';
    default:
      return 'application/octet-stream';
  }
};

main();