#!/usr/bin/env php
<?php

/*
 * Copyright 2011 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

$root = dirname(dirname(dirname(__FILE__)));
require_once $root.'/scripts/__init_script__.php';
require_once $root.'/scripts/__init_env__.php';

phutil_require_module('phabricator', 'infrastructure/daemon/control');
$control = new PhabricatorDaemonControl();

must_have_extension('pcntl');
must_have_extension('posix');

function must_have_extension($ext) {
  if (!extension_loaded($ext)) {
    echo "ERROR: The PHP extension '{$ext}' is not installed. You must ".
         "install it to run daemons on this machine.\n";
    exit(1);
  }
}

switch (isset($argv[1]) ? $argv[1] : 'help') {
  case 'list':
    $err = $control->executeListCommand();
    exit($err);

  case 'status':
    $err = $control->executeStatusCommand();
    exit($err);

  case 'stop':
    $err = $control->executeStopCommand();
    exit($err);

  case 'repository-launch-readonly':
    $need_launch = phd_load_tracked_repositories_of_type('git');
    if (!$need_launch) {
      echo "There are no repositories with tracking enabled.\n";
    } else {
      will_launch($control);

      foreach ($need_launch as $repository) {
        $name = $repository->getName();
        $callsign = $repository->getCallsign();
        $desc = "'{$name}' ({$callsign})";
        $phid = $repository->getPHID();

        echo "Launching 'git fetch' daemon on the {$desc} repository...\n";
        $control->launchDaemon(
          'PhabricatorRepositoryGitFetchDaemon',
          array(
            $phid,
          ));
      }
    }
    break;

  case 'repository-launch-master':
    $need_launch = phd_load_tracked_repositories();
    if (!$need_launch) {
      echo "There are no repositories with tracking enabled.\n";
    } else {
      will_launch($control);

      foreach ($need_launch as $repository) {
        $name = $repository->getName();
        $callsign = $repository->getCallsign();
        $desc = "'{$name}' ({$callsign})";
        $phid = $repository->getPHID();

        switch ($repository->getVersionControlSystem()) {
          case 'git':
            echo "Launching 'git fetch' daemon on the {$desc} repository...\n";
            $control->launchDaemon(
              'PhabricatorRepositoryGitFetchDaemon',
              array(
                $phid,
              ));
            echo "Launching discovery daemon on the {$desc} repository...\n";
            $control->launchDaemon(
              'PhabricatorRepositoryGitCommitDiscoveryDaemon',
              array(
                $phid,
              ));
            break;
          case 'svn':
            echo "Launching discovery daemon on the {$desc} repository...\n";
            $control->launchDaemon(
              'PhabricatorRepositorySvnCommitDiscoveryDaemon',
              array(
                $phid,
              ));
            break;
        }
      }

      echo "Launching CommitTask daemon...\n";
      $control->launchDaemon(
        'PhabricatorRepositoryCommitTaskDaemon',
        array());

      echo "Done.\n";
    }
    break;

  case 'launch':
  case 'debug':
    $is_debug = ($argv[1] == 'debug');

    $daemon = idx($argv, 2);
    if (!$daemon) {
      throw new Exception("Daemon name required!");
    }

    $pass_argv = array_slice($argv, 3);

    $n = 1;
    if (!$is_debug) {
      if (is_numeric($daemon)) {
        $n = $daemon;
        if ($n < 1) {
          throw new Exception("Count must be at least 1!");
        }
        $daemon = idx($argv, 3);
        if (!$daemon) {
          throw new Exception("Daemon name required!");
        }
        $pass_argv = array_slice($argv, 4);
      }
    }

    $loader = new PhutilSymbolLoader();
    $symbols = $loader
      ->setAncestorClass('PhutilDaemon')
      ->selectSymbolsWithoutLoading();

    $symbols = ipull($symbols, 'name');
    $match = array();
    foreach ($symbols as $symbol) {
      if (stripos($symbol, $daemon) !== false) {
        if (strtolower($symbol) == strtolower($daemon)) {
          $match = array($symbol);
          break;
        } else {
          $match[] = $symbol;
        }
      }
    }

    if (count($match) == 0) {
      throw new Exception(
        "No daemons match! Use 'phd list' for a list of daemons.");
    } else if (count($match) > 1) {
      throw new Exception(
        "Which of these daemons did you mean?\n".
        "    ".implode("\n    ", $match));
    } else {
      $daemon = reset($match);
    }

    $with_logs = true;
    if ($is_debug) {
      // In debug mode, we emit errors straight to stdout, so nothing useful
      // will show up in the logs. Don't echo the message about stuff showing
      // up in them, since it would be confusing.
      $with_logs = false;
    }

    will_launch($control, $with_logs);

    if ($is_debug) {
      echo "Launching {$daemon} in debug mode (nondaemonized)...\n";
    } else {
      echo "Launching {$n} x {$daemon}";
    }

    for ($ii = 0; $ii < $n; $ii++) {
      $control->launchDaemon($daemon, $pass_argv, $is_debug);
      if (!$is_debug) {
        echo ".";
      }
    }

    echo "\n";
    echo "Done.\n";

    break;

  case '--help':
  case 'help':
  default:
    $err = $control->executeHelpCommand();
    exit($err);
}

function phd_load_tracked_repositories_of_type($type) {
  $repositories = phd_load_tracked_repositories();

  foreach ($repositories as $key => $repository) {
    if ($repository->getVersionControlSystem() != $type) {
      unset($repositories[$key]);
    }
  }

  return $repositories;
}

function phd_load_tracked_repositories() {
  phutil_require_module(
    'phabricator',
    'applications/repository/storage/repository');

  $repositories = id(new PhabricatorRepository())->loadAll();
  foreach ($repositories as $key => $repository) {
    if (!$repository->getDetail('tracking-enabled')) {
      unset($repositories[$key]);
    }
  }

  return $repositories;
}

function will_launch($control, $with_logs = true) {
  echo "Staging launch...\n";
  $control->pingConduit();
  if ($with_logs) {
    $log_dir = $control->getControlDirectory('log').'/daemons.log';
    echo "NOTE: Logs will appear in '{$log_dir}'.\n\n";
  }
}