import evaluate from 'ts-expression-evaluator';
import * as commander from 'commander';
import * as fs from 'fs';

import { CacheManager } from '../lib/cache';

const files: string[] = [];

(async () => {
  const command = new commander.Command();
  command
    .option('-o, --org-slug <org-slug>', 'Org slug')
    .option('--all', 'Delete all orgs all cache')
    .option('-nd, --no-dry-run', 'Don\'t run in dry run mode')
    .option('-f, --files-file <path>', 'A file containing the files that need to be removed one per line')
    .option('-z, --single-file <url>', 'The url of the file you want to remove from cache')
    .option('-s, --chunk-size <size>', 'Size of chunk for scan. (Default: 10000)')
    .option('-j, --deletion-parallelism <threads>', 'Deletion parallelism')
    .option('-g, --segment-options <segment-options>', 'Segment options filter')
    .parse(process.argv);

  if (!command.orgSlug && !command.all) {
    console.log('You need to specify the org slug for which you want to evict or specify all');
    return;
  }
  const filterOptions = command.segmentOptions ? command.segmentOptions.split(',') : null;

  const orgSlug = command.orgSlug;

  if (command.filesFile) {
    const newFiles = fs.readFileSync(command.filesFile).toString()
      .split('\n')
      .map(x => x.trim())
      .filter(x => !!x);
    Array.prototype.push.apply(files, newFiles);
  }

  if (command.singleFile) {
    files.push(command.singleFile.trim());
  }

  const chunkSize = command.chunkSize || '10000';
  let parallelism = 10;
  if (command.deletionParallelism) {
    parallelism = parseInt(command.deletionParallelism, 10) || 10;
  }

  if (command.dryRun) {
    console.log('Running in dry run mode.');
  }

  await CacheManager.getInstance().clearCache(
    orgSlug,
    files,
    chunkSize,
    parallelism,
    (segment) => {
      if (filterOptions) {
        return filterOptions.reduce((acc: boolean, curr: string) => acc && evaluate(curr, segment), true);
      }

      return true;
    },
    command.dryRun,
  );

  process.exit(0);
})();