<?php
namespace ProVM\Common\Service;

use Psr\Container\ContainerInterface as Container;
use Composer\Console\Application;
use Symfony\Component\Console\Input\ArrayInput as Input;
use ProVM\Common\Define\ArrayOutput as Output;

class Composer {
  const MAYOR = 0;
  const MINOR = 1;
  const PATCH = 2;
  const RELEASE = 3;

  protected $composer_file;
  public function __construct(string $composer_file) {
    $this->composer_file = $composer_file;
  }

  public function search($query): array {
    putenv('COMPOSER=' . $this->composer_file);
    $input = new Input([
      'command' => 'search',
      'tokens' => [$query]
    ]);
    $output = new Output();
    $app = new Application();
    $app->setAutoExit(false);
    $app->run($input, $output);
    return $this->parseOutput($output->fetch());
  }
  protected function parseOutput(array $input): array {
    $output = [];
    foreach ($input as $line) {
      if (strpos($line[0], '<') !== false) {
        continue;
      }
      $pos = strpos($line[0], ' ');
      $name = substr($line[0], 0, $pos);
      $desc = substr($line[0], $pos + 1);
      $output []= (object) compact('name', 'desc');
    }
    return $output;
  }
  public function latest(string $package): string {
    putenv('COMPOSER=' . $this->composer_file);
    $input = new Input([
      'command' => 'show',
      '--all' => true,
      '--latest' => true,
      'package' => $package
    ]);
    $output = new Output();
    $app = new Application();
    $app->setAutoExit(false);
    $app->run($input, $output);
    $arr = $output->fetch();
    $latest = '*';
    foreach ($arr as $line) {
      if (strpos($line[0], 'latest') === false) {
        continue;
      }
      list($option, $value) = explode(':', $line[0]);
      if (trim($option) == 'latest') {
        $latest = trim($value);
      }
    }
    return $latest;
  }
  public function getLatest(array $packages, int $semver = Composer::MINOR): array {
    $output = [];
    foreach ($packages as $package) {
      $latest = $this->semver($this->latest($package), $semver);
      $output[$package] = $latest;
    }
    return $output;
  }
  protected function semver(string $version, int $semver) {
    switch ($semver) {
      case Composer::PATCH:
      case Composer::RELEASE:
        return $version;
      case Composer::MINOR:
        if (strpos($version, '.') === false) {
          return $version;
        }
        $v = explode('.', $version);
        if (count($v) < 3) {
          return '^' . $version;
        }
        array_pop($v);
        $version = '^' . implode('.', $v);
        return $version;
      case Composer::MAYOR:
        if (strpos($version, '.') === false) {
          return $version;
        }
        $v = explode('.', $version);
        return '^' . $v[0];
    }
  }
}