<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Tool
 * @subpackage Framework
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id$
 */

/**
 * ZF
 *  
 * @category   Zend
 * @package    Zend_Tool
 * @subpackage Framework
 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class ZF
{

    /**
     * @var bool
     */
    protected $_clientLoaded = false;
    
    /**
     * @var string
     */
    protected $_mode = 'runTool';
    
    /**
     * @var array of messages
     */
    protected $_messages = array();
    
    /**
     * @var string
     */
    protected $_homeDirectory = null;
    
    /**
     * @var string
     */
    protected $_storageDirectory = null;
    
    /**
     * @var string
     */
    protected $_configFile = null;
    
    /**
     * main()
     * 
     * @return void
     */
    public static function main()
    {
        $zf = new self();
        $zf->bootstrap();
        $zf->run();
    }
    
    /**
     * bootstrap()
     * 
     * @return ZF
     */
    public function bootstrap()
    {
        // detect settings
        $this->_mode             = $this->_detectMode();
        $this->_homeDirectory    = $this->_detectHomeDirectory();
        $this->_storageDirectory = $this->_detectStorageDirectory();
        $this->_configFile       = $this->_detectConfigFile();
        
        // setup
        $this->_setupPHPRuntime();
        $this->_setupToolRuntime();
    }
    
    /**
     * run()
     * 
     * @return ZF
     */
    public function run()
    {
        switch ($this->_mode) {
            case 'runError':
                $this->_runError();
                $this->_runInfo();
                break;
            case 'runSetup':
                if ($this->_runSetup() === false) {
                    $this->_runInfo();
                }
                break;
            case 'runInfo':
                $this->_runInfo();
                break;
            case 'runTool':
            default:
                $this->_runTool();
                break;
        }
        
        return $this;
    }
    
    /**
     * _detectMode()
     * 
     * @return ZF
     */
    protected function _detectMode()
    {
        $arguments = $_SERVER['argv'];

        $mode = 'runTool';
        
        if (!isset($arguments[0])) {
            return $mode;
        }
        
        if ($arguments[0] == $_SERVER['PHP_SELF']) {
            $this->_executable = array_shift($arguments);
        }
        
        if (!isset($arguments[0])) {
            return $mode;
        }
        
        if ($arguments[0] == '--setup') {
            $mode = 'runSetup';
        } elseif ($arguments[0] == '--info') {
            $mode = 'runInfo';
        }
        
        return $mode;
    }
    

    /**
     * _detectHomeDirectory() - detect the home directory in a variety of different places
     * 
     * @param $mustExist Should the returned value already exist in the file system
     * @param $returnMessages Should it log messages for output later
     * @return string
     */
    protected function _detectHomeDirectory($mustExist = true, $returnMessages = true)
    {
        $homeDirectory = null;
        
        $homeDirectory = getenv('ZF_HOME'); // check env var ZF_HOME
        if ($homeDirectory) {
            $this->_logMessage('Home directory found in environment variable ZF_HOME with value ' . $homeDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($homeDirectory))) {
                return $homeDirectory;
            } else {
                $this->_logMessage('Home directory does not exist at ' . $homeDirectory, $returnMessages);
            }
        }
        
        $homeDirectory = getenv('HOME'); // HOME environment variable
        
        if ($homeDirectory) {
            $this->_logMessage('Home directory found in environment variable HOME with value ' . $homeDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($homeDirectory))) {
                return $homeDirectory;
            } else {
                $this->_logMessage('Home directory does not exist at ' . $homeDirectory, $returnMessages);
            }
            
        }

        $homeDirectory = getenv('HOMEPATH');
            
        if ($homeDirectory) {
            $this->_logMessage('Home directory found in environment variable HOMEPATH with value ' . $homeDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($homeDirectory))) {
                return $homeDirectory;
            } else {
                $this->_logMessage('Home directory does not exist at ' . $homeDirectory, $returnMessages);
            }
        }

        $homeDirectory = getenv('USERPROFILE');
        
        if ($homeDirectory) {
            $this->_logMessage('Home directory found in environment variable USERPROFILE with value ' . $homeDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($homeDirectory))) {
                return $homeDirectory;
            } else {
                $this->_logMessage('Home directory does not exist at ' . $homeDirectory, $returnMessages);
            }
        }
        
        return false;
    }
    
    /**
     * _detectStorageDirectory() - Detect where the storage directory is from a variaty of possiblities
     * 
     * @param $mustExist Should the returned value already exist in the file system
     * @param $returnMessages Should it log messages for output later
     * @return string
     */
    protected function _detectStorageDirectory($mustExist = true, $returnMessages = true)
    {
        $storageDirectory = false;
        
        $storageDirectory = getenv('ZF_STORAGE_DIR');
        if ($storageDirectory) {
            $this->_logMessage('Storage directory path found in environment variable ZF_STORAGE_DIR with value ' . $storageDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($storageDirectory))) {
                return $storageDirectory;
            } else {
                $this->_logMessage('Storage directory does not exist at ' . $storageDirectory, $returnMessages);
            }
        }
        
        $homeDirectory = ($this->_homeDirectory) ? $this->_homeDirectory : $this->_detectHomeDirectory(true, false); 
        
        if ($homeDirectory) {
            $storageDirectory = $homeDirectory . '/.zf/';
            $this->_logMessage('Storage directory assumed in home directory at location ' . $storageDirectory, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($storageDirectory))) {
                return $storageDirectory;
            } else {
                $this->_logMessage('Storage directory does not exist at ' . $storageDirectory, $returnMessages);
            }
        }
        
        return false;
    }
    
    /**
     * _detectConfigFile() - Detect config file location from a variety of possibilities
     * 
     * @param $mustExist Should the returned value already exist in the file system
     * @param $returnMessages Should it log messages for output later
     * @return string
     */
    protected function _detectConfigFile($mustExist = true, $returnMessages = true)
    {
        $configFile = null;
        
        $configFile = getenv('ZF_CONFIG_FILE');
        if ($configFile) {
            $this->_logMessage('Config file found environment variable ZF_CONFIG_FILE at ' . $configFile, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($configFile))) {
                return $configFile;
            } else {
                $this->_logMessage('Config file does not exist at ' . $configFile, $returnMessages);
            }
        }
        
        $homeDirectory = ($this->_homeDirectory) ? $this->_homeDirectory : $this->_detectHomeDirectory(true, false);
        if ($homeDirectory) {
            $configFile = $homeDirectory . '/.zf.ini';
            $this->_logMessage('Config file assumed in home directory at location ' . $configFile, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($configFile))) {
                return $configFile;
            } else {
                $this->_logMessage('Config file does not exist at ' . $configFile, $returnMessages);
            }
        }
        
        $storageDirectory = ($this->_storageDirectory) ? $this->_storageDirectory : $this->_detectStorageDirectory(true, false);
        if ($storageDirectory) {
            $configFile = $storageDirectory . '/zf.ini';
            $this->_logMessage('Config file assumed in storage directory at location ' . $configFile, $returnMessages);
            if (!$mustExist || ($mustExist && file_exists($configFile))) {
                return $configFile;
            } else {
                $this->_logMessage('Config file does not exist at ' . $configFile, $returnMessages);
            }
        }
        
        return false;
    }
    

    /**
     * _setupPHPRuntime() - parse the config file if it exists for php ini values to set
     * 
     * @return void
     */
    protected function _setupPHPRuntime()
    {
        // set php runtime settings
        ini_set('display_errors', true);
        
        // support the changing of the current working directory, necessary for some providers
        if (isset($_ENV['ZEND_TOOL_CURRENT_WORKING_DIRECTORY'])) {
            chdir($_ENV['ZEND_TOOL_CURRENT_WORKING_DIRECTORY']);
        }
        
        if (!$this->_configFile) {
            return;
        }
        $zfINISettings = parse_ini_file($this->_configFile);
        $phpINISettings = ini_get_all();
        foreach ($zfINISettings as $zfINIKey => $zfINIValue) {
            if (substr($zfINIKey, 0, 4) === 'php.') {
                $phpINIKey = substr($zfINIKey, 4); 
                if (array_key_exists($phpINIKey, $phpINISettings)) {
                    ini_set($phpINIKey, $zfINIValue);
                }
            }
        }
    }
    
    /**
     * _setupToolRuntime() - setup the tools include_path and load the proper framwork parts that
     * enable Zend_Tool to work.
     * 
     * @return void
     */
    protected function _setupToolRuntime()
    {

        $includePathPrepend = getenv('ZEND_TOOL_INCLUDE_PATH_PREPEND');
        $includePathFull = getenv('ZEND_TOOL_INCLUDE_PATH');
        
        // check if the user has not provided anything
        if (!($includePathPrepend || $includePathFull)) {
            if ($this->_tryClientLoad()) {
                return;
            }
        }
        
        // if ZF is not in the include_path, but relative to this file, put it in the include_path
        if ($includePathPrepend || $includePathFull) {
            if (isset($includePathPrepend) && ($includePathPrepend !== false)) {
                set_include_path($includePathPrepend . PATH_SEPARATOR . get_include_path());
            } elseif (isset($includePathFull) && ($includePathFull !== false)) {
                set_include_path($includePathFull);
            }
        }
        
        if ($this->_tryClientLoad()) {
            return;
        }
        
        $zfIncludePath['relativePath'] = dirname(__FILE__) . '/../library/';
        if (file_exists($zfIncludePath['relativePath'] . 'Zend/Tool/Framework/Client/Console.php')) {
            set_include_path(realpath($zfIncludePath['relativePath']) . PATH_SEPARATOR . get_include_path());
        }
    
        if (!$this->_tryClientLoad()) {
            $this->_mode = 'runError';
            return;
        }
    }
    
    /**
     * _tryClientLoad() - Attempt to load the Zend_Tool_Framework_Client_Console to enable the tool to run.
     * 
     * This method will return false if its not loaded to allow the consumer to alter the environment in such
     * a way that it can be called again to try loading the proper file/class.
     * 
     * @return bool if the client is actuall loaded or not
     */
    protected function _tryClientLoad()
    {
        $this->_clientLoaded = false;
        $fh = @fopen('Zend/Tool/Framework/Client/Console.php', 'r', true);
        if (!$fh) {
            return $this->_clientLoaded; // false
        } else {
            fclose($fh);
            unset($fh);
            include 'Zend/Tool/Framework/Client/Console.php';
            $this->_clientLoaded = class_exists('Zend_Tool_Framework_Client_Console');
        }
        
        return $this->_clientLoaded;
    }
    
    /**
     * _runError() - Output the error screen that tells the user that the tool was not setup
     * in a sane way
     * 
     * @return void
     */
    protected function _runError()
    {
        
        echo <<<EOS
    
***************************** ZF ERROR ********************************
In order to run the zf command, you need to ensure that Zend Framework
is inside your include_path.  There are a variety of ways that you can
ensure that this zf command line tool knows where the Zend Framework
library is on your system, but not all of them can be described here.

The easiest way to get the zf command running is to give it the include 
path via an environment variable ZEND_TOOL_INCLUDE_PATH or 
ZEND_TOOL_INCLUDE_PATH_PREPEND with the proper include path to use,
then run the command "zf --setup".  This command is designed to create
a storage location for your user, as well as create the zf.ini file
that the zf command will consult in order to run properly on your
system.  

Example you would run:

$ ZEND_TOOL_INCLUDE_PATH=/path/to/library zf --setup

Your are encourged to read more in the link that follows.

EOS;

    }
    
    /**
     * _runInfo() - this command will produce information about the setup of this script and
     * Zend_Tool
     * 
     * @return void
     */
    protected function _runInfo()
    {
        echo 'Zend_Tool & CLI Setup Information' . PHP_EOL
           . '(available via the command line "zf --info")' 
           . PHP_EOL;
        
        echo '   * ' . implode(PHP_EOL . '   * ', $this->_messages) . PHP_EOL;
        
        echo PHP_EOL;
        
        echo 'To change the setup of this tool, run: "zf --setup"';
           
        echo PHP_EOL;

    }
    
    /**
     * _runSetup() - parse the request to see which setup command to run
     * 
     * @return void
     */
    protected function _runSetup()
    {
        $setupCommand = (isset($_SERVER['argv'][2])) ? $_SERVER['argv'][2] : null;
        
        switch ($setupCommand) {
            case 'storage-directory':
                $this->_runSetupStorageDirectory();
                break;
            case 'config-file':
                $this->_runSetupConfigFile();
                break;
            default:
                $this->_runSetupMoreInfo();
                break;
        }
    }

    /**
     * _runSetupStorageDirectory() - if the storage directory does not exist, create it
     * 
     * @return void
     */
    protected function _runSetupStorageDirectory()
    {
        $storageDirectory = $this->_detectStorageDirectory(false, false);
        
        if (file_exists($storageDirectory)) {
            echo 'Directory already exists at ' . $storageDirectory . PHP_EOL
               . 'Cannot create storage directory.';
            return;
        }
        
        mkdir($storageDirectory);
        
        echo 'Storage directory created at ' . $storageDirectory . PHP_EOL;
    }

    /**
     * _runSetupConfigFile()
     * 
     * @return void
     */
    protected function _runSetupConfigFile()
    {
        $configFile = $this->_detectConfigFile(false, false);
        
        if (file_exists($configFile)) {
            echo 'File already exists at ' . $configFile . PHP_EOL
               . 'Cannot write new config file.';
            return;
        }
        
        $includePath = get_include_path();
        
        $contents = 'php.include_path = "' . $includePath . '"';
        
        file_put_contents($configFile, $contents);
        
        $iniValues = ini_get_all();
        if ($iniValues['include_path']['global_value'] != $iniValues['include_path']['local_value']) {
            echo 'NOTE: the php include_path to be used with the tool has been written' . PHP_EOL
               . 'to the config file, using ZF_INCLUDE_PATH (or other include_path setters)' . PHP_EOL
               . 'is no longer necessary.' . PHP_EOL . PHP_EOL;
        }
        
        echo 'Config file written to ' . $configFile . PHP_EOL;
    }

    /**
     * _runSetupMoreInfo() - return more information about what can be setup, and what is setup
     * 
     * @return void
     */
    protected function _runSetupMoreInfo()
    {
        $homeDirectory    = $this->_detectHomeDirectory(false, false);
        $storageDirectory = $this->_detectStorageDirectory(false, false);
        $configFile       = $this->_detectConfigFile(false, false);
        
        echo <<<EOS

ZF Command Line Tool - Setup
----------------------------
        
Current Paths (Existing or not):
    Home Directory: {$homeDirectory}
    Storage Directory: {$storageDirectory}
    Config File: {$configFile}

Important Environment Variables:
    ZF_HOME 
        - the directory this tool will look for a home directory
        - directory must exist
    ZF_STORAGE_DIRECTORY 
        - where this tool will look for a storage directory
        - directory must exist
    ZF_CONFIG_FILE 
        - where this tool will look for a configuration file
    ZF_INCLUDE_PATH
        - set the include_path for this tool to use this value
    ZF_INCLUDE_PATH_PREPEND
        - prepend the current php.ini include_path with this value
    
Search Order:
    Home Directory:
        - ZF_HOME, then HOME (*nix), then HOMEPATH (windows)
    Storage Directory:
        - ZF_STORAGE_DIR, then {home}/.zf/
    Config File:
        - ZF_CONFIG_FILE, then {home}/.zf.ini, then {home}/zf.ini,
          then {storage}/zf.ini

Commands:
    zf --setup storage-directory
        - setup the storage directory, directory will be created
    zf --setup config-file
        - create the config file with some default values


EOS;
    }
    
    /**
     * _runTool() - This is where the magic happens, dispatch Zend_Tool
     * 
     * @return void
     */
    protected function _runTool()
    {
        
        $configOptions = array();
        if (isset($this->_configFile) && $this->_configFile) {
            $configOptions['configOptions']['configFilepath'] = $this->_configFile;
        }
        if (isset($this->_storageDirectory) && $this->_storageDirectory) {
            $configOptions['storageOptions']['directory'] = $this->_storageDirectory;
        }
        
        // ensure that zf.php loads the Zend_Tool_Project features
        $configOptions['classesToLoad'] = 'Zend_Tool_Project_Provider_Manifest';
        
        $console = new Zend_Tool_Framework_Client_Console($configOptions);
        $console->dispatch();
    }

    /**
     * _logMessage() - Internal method used to log setup and information messages.
     * 
     * @param $message
     * @param $storeMessage
     * @return void
     */
    protected function _logMessage($message, $storeMessage = true)
    {
        if (!$storeMessage) {
            return;
        }
        
        $this->_messages[] = $message;
    }
    
    
}

if (!getenv('ZF_NO_MAIN')) {
    ZF::main();
}
