import os from 'os';
import path from 'path';
import * as fs from 'fs';
import * as semver from 'semver';
import * as cache from '@actions/cache';
import * as core from '@actions/core';

import * as tc from '@actions/tool-cache';
import {INPUT_JOB_STATUS, DISTRIBUTIONS_ONLY_MAJOR_VERSION} from './constants';
import {OutgoingHttpHeaders} from 'http';

export function getTempDir() {
  const tempDirectory = process.env['RUNNER_TEMP'] || os.tmpdir();

  return tempDirectory;
}

export function getBooleanInput(inputName: string, defaultValue = false) {
  return (
    (core.getInput(inputName) || String(defaultValue)).toUpperCase() === 'TRUE'
  );
}

export function getVersionFromToolcachePath(toolPath: string) {
  if (toolPath) {
    return path.basename(path.dirname(toolPath));
  }

  return toolPath;
}

export async function extractJdkFile(toolPath: string, extension?: string) {
  if (!extension) {
    extension = toolPath.endsWith('.tar.gz')
      ? 'tar.gz'
      : path.extname(toolPath);
    if (extension.startsWith('.')) {
      extension = extension.substring(1);
    }
  }

  switch (extension) {
    case 'tar.gz':
    case 'tar':
      return await tc.extractTar(toolPath);
    case 'zip':
      return await tc.extractZip(toolPath);
    default:
      return await tc.extract7z(toolPath);
  }
}

export function getDownloadArchiveExtension() {
  return process.platform === 'win32' ? 'zip' : 'tar.gz';
}

export function isVersionSatisfies(range: string, version: string): boolean {
  if (semver.valid(range)) {
    // if full version with build digit is provided as a range (such as '1.2.3+4')
    // we should check for exact equal via compareBuild
    // since semver.satisfies doesn't handle 4th digit
    const semRange = semver.parse(range);
    if (semRange && semRange.build?.length > 0) {
      return semver.compareBuild(range, version) === 0;
    }
  }

  return semver.satisfies(version, range);
}

export function getToolcachePath(
  toolName: string,
  version: string,
  architecture: string
) {
  const toolcacheRoot = process.env['RUNNER_TOOL_CACHE'] ?? '';
  const fullPath = path.join(toolcacheRoot, toolName, version, architecture);
  if (fs.existsSync(fullPath)) {
    return fullPath;
  }

  return null;
}

export function isJobStatusSuccess() {
  const jobStatus = core.getInput(INPUT_JOB_STATUS);

  return jobStatus === 'success';
}

export function isGhes(): boolean {
  const ghUrl = new URL(
    process.env['GITHUB_SERVER_URL'] || 'https://github.com'
  );
  return ghUrl.hostname.toUpperCase() !== 'GITHUB.COM';
}

export function isCacheFeatureAvailable(): boolean {
  if (cache.isFeatureAvailable()) {
    return true;
  }

  if (isGhes()) {
    core.warning(
      'Caching is only supported on GHES version >= 3.5. If you are on a version >= 3.5, please check with your GHES admin if the Actions cache service is enabled or not.'
    );
    return false;
  }

  core.warning(
    'The runner was not able to contact the cache service. Caching will be skipped'
  );
  return false;
}

export function getVersionFromFileContent(
  content: string,
  distributionName: string,
  versionFile: string
): string | null {
  let javaVersionRegExp: RegExp;
  if (versionFile == '.tool-versions') {
    javaVersionRegExp =
      /^(java\s+)(?:\S*-)?v?(?<version>(\d+)(\.\d+)?(\.\d+)?(\+\d+)?(-ea(\.\d+)?)?)$/m;
  } else if (versionFile == '.java-version') {
    javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
  } else {
    throw new Error('Invalid version file');
  }

  const fileContent = content.match(javaVersionRegExp)?.groups?.version
    ? (content.match(javaVersionRegExp)?.groups?.version as string)
    : '';
  if (!fileContent) {
    return null;
  }

  core.debug(`Version from file '${fileContent}'`);

  const tentativeVersion = avoidOldNotation(fileContent);
  const rawVersion = tentativeVersion.split('-')[0];

  let version = semver.validRange(rawVersion)
    ? tentativeVersion
    : semver.coerce(tentativeVersion);

  core.debug(`Range version from file is '${version}'`);

  if (!version) {
    return null;
  }

  if (DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(distributionName)) {
    const coerceVersion = semver.coerce(version) ?? version;
    version = semver.major(coerceVersion).toString();
  }

  return version.toString();
}

// By convention, action expects version 8 in the format `8.*` instead of `1.8`
function avoidOldNotation(content: string): string {
  return content.startsWith('1.') ? content.substring(2) : content;
}

export function convertVersionToSemver(version: number[] | string) {
  // Some distributions may use semver-like notation (12.10.2.1, 12.10.2.1.1)
  const versionArray = Array.isArray(version) ? version : version.split('.');
  const mainVersion = versionArray.slice(0, 3).join('.');
  if (versionArray.length > 3) {
    return `${mainVersion}+${versionArray.slice(3).join('.')}`;
  }
  return mainVersion;
}

export function getGitHubHttpHeaders(): OutgoingHttpHeaders {
  const token = core.getInput('token');
  const auth = !token ? undefined : `token ${token}`;

  const headers: OutgoingHttpHeaders = {
    accept: 'application/vnd.github.VERSION.raw'
  };

  if (auth) {
    headers.authorization = auth;
  }
  return headers;
}