import * as core from '@actions/core';

import { getCodeQL, isTracedLanguage } from './codeql';
import * as config_utils from './config-utils';
import * as util from './util';

interface AutobuildStatusReport extends util.StatusReportBase {
  // Comma-separated set of languages being autobuilt
  autobuild_languages: string;
  // Language that failed autobuilding (or undefined if all languages succeeded).
  autobuild_failure?: string;
}

async function sendCompletedStatusReport(
  startedAt: Date,
  allLanguages: string[],
  failingLanguage?: string,
  cause?: Error) {

  const status = failingLanguage !== undefined || cause !== undefined ? 'failure' : 'success';
  const statusReportBase = await util.createStatusReportBase(
    'autobuild',
    status,
    startedAt,
    cause?.message,
    cause?.stack);
  const statusReport: AutobuildStatusReport = {
    ...statusReportBase,
    autobuild_languages: allLanguages.join(','),
    autobuild_failure: failingLanguage,
  };
  await util.sendStatusReport(statusReport);
}

async function run() {
  const startedAt = new Date();
  let language;
  try {
    util.prepareLocalRunEnvironment();
    if (!await util.sendStatusReport(await util.createStatusReportBase('autobuild', 'starting', startedAt), true)) {
      return;
    }

    const config = await config_utils.getConfig();

    // Attempt to find a language to autobuild
    // We want pick the dominant language in the repo from the ones we're able to build
    // The languages are sorted in order specified by user or by lines of code if we got
    // them from the GitHub API, so try to build the first language on the list.
    const autobuildLanguages = config.languages.filter(isTracedLanguage);
    language = autobuildLanguages[0];

    if (!language) {
      core.info("None of the languages in this project require extra build steps");
      return;
    }

    core.debug(`Detected dominant traced language: ${language}`);

    if (autobuildLanguages.length > 1) {
      core.warning(`We will only automatically build ${language} code. If you wish to scan ${autobuildLanguages.slice(1).join(' and ')}, you must replace this block with custom build steps.`);
    }

    core.startGroup(`Attempting to automatically build ${language} code`);
    const codeQL = getCodeQL();
    await codeQL.runAutobuild(language);

    core.endGroup();

  } catch (error) {
    core.setFailed("We were unable to automatically build your code. Please replace the call to the autobuild action with your custom build steps.  " + error.message);
    console.log(error);
    await sendCompletedStatusReport(startedAt, [language], language, error);
    return;
  }

  await sendCompletedStatusReport(startedAt, [language]);
}

run().catch(e => {
  core.setFailed("autobuild action failed.  " + e);
  console.log(e);
});