<?php
/**
 * Fuel
 *
 * Fuel is a fast, lightweight, community driven PHP5 framework.
 *
 * @package    Fuel
 * @version    1.8
 * @author     Fuel Development Team
 * @license    MIT License
 * @copyright  2010 - 2016 Fuel Development Team
 * @link       http://fuelphp.com
 */

namespace Oil;

/**
 * Oil\Generate Class
 *
 * @package		Fuel
 * @subpackage	Oil
 * @category	Core
 * @author		Phil Sturgeon
 */
class Generate
{
	public static $create_folders = array();
	public static $create_files = array();

	public static $scaffolding = false;

	private static $_default_constraints = array(
		'varchar' => 255,
		'char' => 255,
		'int' => 11,
	);

	public static function config($args)
	{
		$file = strtolower(array_shift($args));

		if (empty($file))
		{
			throw new Exception('No config filename has been provided.');
		}

		$config = array();

		// load the config
		if ($paths = \Finder::search('config', $file, '.php', true))
		{
			// Reverse the file list so that we load the core configs first and
			// the app can override anything.
			$paths = array_reverse($paths);
			foreach ($paths as $path)
			{
				$config = \Fuel::load($path) + $config;
			}
		}
		unset($path);

		// We always pass in fields to a config, so lets sort them out here.
		foreach ($args as $conf)
		{
			// Each paramater for a config is seperated by the : character
			$parts = explode(":", $conf);

			// We must have the 'name:value' if nothing else!
			if (count($parts) >= 2)
			{
				$config[$parts[0]] = $parts[1];
			}
		}

		$overwrite = (\Cli::option('o') or \Cli::option('overwrite'));

		// strip whitespace and add tab
		$export = str_replace(array('  ', 'array ('), array("\t", 'array('), var_export($config, true));

		$content = '<?php'.PHP_EOL.PHP_EOL.'return '.$export.';';
		$content .= <<<CONF


/* End of file $file.php */
CONF;

		$module = \Cli::option('module', \Cli::option('m'));

		// add support for `php oil g config module::file arg1:value1`
		if (strpos($file, '::') !== false)
		{
			list($module, $file) = explode('::', $file);
		}

		// get the namespace path (if available)
		if ( ! empty($module) and $path = \Autoloader::namespace_path('\\'.ucfirst($module)))
		{
			// strip the classes directory as we need the module root
			// and construct the filename
			$path = substr($path, 0, -8).'config'.DS.$file.'.php';
			$path_name = "\\".ucfirst($module).'::';
		}
		elseif ( ! empty($module))
		{
			throw new Exception("{$module} need to be loaded first, please use config always_load.modules.");
		}
		else
		{
			$path = APPPATH.'config'.DS.$file.'.php';
			$path_name = 'APPPATH/';
		}

		if ( ! $overwrite and is_file($path))
		{
			throw new Exception("{$path_name}/config/{$file}.php already exist, please use --overwrite option to force update");
		}

		$path = pathinfo($path);

		try
		{
			\File::update($path['dirname'], $path['basename'], $content);
			\Cli::write("Created config: {$path_name}config/{$file}.php", 'green');
		}
		catch (\InvalidPathException $e)
		{
			throw new Exception("Invalid basepath, cannot update at ".$path_name."config".DS."{$file}.php");
		}
		catch (\FileAccessException $e)
		{
			throw new Exception($path_name."config".DS.$file.".php could not be written.");
		}
	}

	public static function controller($args, $build = true)
	{
		if ( ! ($name = \Str::lower(array_shift($args))))
		{
			throw new Exception('No controller name was provided.');
		}

		// Do we want a view or a presenter?
		$with_presenter = \Cli::option('with-presenter') or \Cli::option('with-viewmodel');

 		$actions = $args;

		$filename = trim(str_replace(array('_', '-'), DS, $name), DS);

		$base_path = APPPATH;

		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module '.$module.' was not found within any of the defined module paths');
			}
		}

		$filepath = $base_path.'classes'.DS.'controller'.DS.$filename.'.php';

		// Uppercase each part of the class name and remove hyphens
		$class_name = \Inflector::classify(str_replace(array('\\', '/'), '_', $name), false);

		// Generate with test?
		$with_test = \Cli::option('with-test');
		if ($with_test) {
			static::_create_test('Controller', $class_name, $base_path);
		}

		// Stick "blog" to the start of the array
		array_unshift($args, $filename);

		// Create views folder and each view file
		if (\Cli::option('crud'))
		{
			static::views($args, 'scaffolding'.DS.'crud'.DS.'views', false);
		}
		else
		{
			static::views($args, 'scaffolding'.DS.'orm'.DS.'views', false);
		}

		$actions or $actions = array('index');

		$action_str = '';
		foreach ($actions as $action)
		{
			$action_str .= '
	public function action_'.$action.'()
	{
		$data["subnav"] = array(\''.$action.'\'=> \'active\' );
		$this->template->title = \'' . \Inflector::humanize($name) .' &raquo; ' . \Inflector::humanize($action) . '\';
		$this->template->content = View::forge(\''.$filename.'/' . $action .'\', $data);
	}'.PHP_EOL;
		}

		$extends = \Cli::option('extends', 'Controller_Template');
		$prefix = \Config::get('controller_prefix', 'Controller_');

		// Build Controller
		$controller = <<<CONTROLLER
<?php

class {$prefix}{$class_name} extends {$extends}
{
{$action_str}
}

CONTROLLER;

		// Write controller
		static::create($filepath, $controller, 'controller');

		// Do you want a presenter with that?
		if ($with_presenter)
		{
			$presenter_filepath = $base_path.'classes'.DS.'presenter'.DS.$filename;

			// One Presenter per action
			foreach ($actions as $action)
			{
				$presenter = <<<PRESENTER
<?php

class Presenter_{$class_name}_{$action} extends Presenter
{
	public function view()
	{
		\$this->content = "{$class_name} &raquo; {$action}";
	}
}
PRESENTER;

				// Write presenter
				static::create($presenter_filepath.DS.$action.'.php', $presenter, 'presenter');
			}
		}

		// Generate with test?
		$with_test = \Cli::option('with-test');
		if ($with_presenter and $with_test) {
			static::_create_test('Presenter', $class_name, $base_path);
		}

		$build and static::build();
	}

	public static function model($args, $build = true)
	{
		$singular = \Inflector::singularize(\Str::lower(array_shift($args)));

		if (empty($singular) or strpos($singular, ':'))
		{
			throw new Exception("Command is invalid.".PHP_EOL."\tphp oil g model <modelname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]");
		}

		if (empty($args))
		{
			throw new Exception('No fields have been provided, the model will not know how to build the table.');
		}

		$plural = \Cli::option('singular') ? $singular : \Inflector::pluralize($singular);

		$filename = trim(str_replace(array('_', '-'), DS, $singular), DS);
		$base_path = APPPATH;

		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module '.$module.' was not found within any of the defined module paths');
			}

			$module_namespace = ucwords($module);
		}

		$filepath = $base_path.'classes'.DS.'model'.DS.$filename.'.php';

		// Uppercase each part of the class name and remove hyphens
		$class_name = \Inflector::classify(str_replace(array('\\', '/'), '_', $singular), false);

		// Turn foo:string into "id", "foo",
		$properties = implode(",\n\t\t", array_map(function($field) {

			// Only take valid fields
			if (($field = strstr($field, ':', true)))
			{
				return "'".$field."'";
			}

		}, $args));

		// Add a comma to the end of the list
		$properties = "\n\t\t" . $properties . ",";

		$contents = '';

		// Generate with test?
		$with_test = \Cli::option('with-test');
		if ($with_test) {
			static::_create_test('Model', $class_name, $base_path);
		}

		if (\Cli::option('crud'))
		{
			// Make sure an id is present
			strpos($properties, "'id'") === false and $properties = "'id',".$properties;

			if ( ! \Cli::option('no-properties'))
			{
				$contents = <<<CONTENTS
	protected static \$_properties = array(
		{$properties}
	);

CONTENTS;
			}

			if($created_at = \Cli::option('created-at'))
			{
				is_string($created_at) or $created_at = 'created_at';

				$contents .= <<<CONTENTS

	protected static \$_created_at = '$created_at';

CONTENTS;
			}

			if($updated_at = \Cli::option('updated-at'))
			{
				is_string($updated_at) or $updated_at = 'updated_at';

				$contents .= <<<CONTENTS

	protected static \$_updated_at = '$updated_at';

CONTENTS;
			}

			if(\Cli::option('mysql-timestamp'))
			{
				$contents .= <<<CONTENTS

	protected static \$_mysql_timestamp = true;

CONTENTS;
			}

			$contents .= <<<CONTENTS

	protected static \$_table_name = '{$plural}';

CONTENTS;
			if ($module)
			{
				$model = <<<MODEL
<?php namespace {$module_namespace};

class Model_{$class_name} extends \Model_Crud
{
{$contents}
}

MODEL;
			}
			else
			{
				$model = <<<MODEL
<?php

class Model_{$class_name} extends \Model_Crud
{
{$contents}
}

MODEL;
			}
		}
		else
		{
			$time_type = (\Cli::option('mysql-timestamp')) ? 'timestamp' : 'int';
			$no_timestamp_default = false;

			if ( \Cli::option('soft-delete'))
			{
				$deleted_at = \Cli::option('deleted-at', 'deleted_at');
				is_string($deleted_at) or $deleted_at = 'deleted_at';
				$properties .= "\n\t\t'".$deleted_at."',";

				$args = array_merge($args, array($deleted_at.':'.$time_type.':null[1]'));
			}
			elseif (\Cli::option('temporal'))
			{
				$temporal_end = \Cli::option('temporal-end', 'temporal_end');
				is_string($temporal_end) or $temporal_end = 'temporal_end';
				$properties = "\n\t\t'".$temporal_end."'," . $properties;

				$args = array_merge(array($temporal_end.':'.$time_type), $args);

				$temporal_start = \Cli::option('temporal-start', 'temporal_start');
				is_string($temporal_start) or $temporal_start = 'temporal_start';
				$properties = "\n\t\t'".$temporal_start."'," . $properties;

				$args = array_merge(array($temporal_start.':'.$time_type), $args);
				$no_timestamp_default = true;
			}
			elseif (\Cli::option('nestedset'))
			{
				$title = \Cli::option('title', false);

				if ($title)
				{
					is_string($title) or $title = 'title';
					$properties = "\n\t\t'".$title."'," . $properties;

					$args = array_merge(array($title.':varchar[50]'), $args);
				}

				$tree_id = \Cli::option('tree-id', false);

				if ($tree_id)
				{
					is_string($tree_id) or $tree_id = 'tree_id';
					$properties = "\n\t\t'".$tree_id."'," . $properties;

					$args = array_merge(array($tree_id.':int:unsigned'), $args);
				}

				$right_id = \Cli::option('right-id', 'right_id');
				is_string($right_id) or $right_id = 'right_id';
				$properties = "\n\t\t'".$right_id."'," . $properties;

				$args = array_merge(array($right_id.':int:unsigned'), $args);

				$left_id = \Cli::option('left-id', 'left_id');
				is_string($left_id) or $left_id = 'left_id';
				$properties = "\n\t\t'".$left_id."'," . $properties;

				$args = array_merge(array($left_id.':int:unsigned'), $args);
				$no_timestamp_default = true;
			}

			if ( ! \Cli::option('no-timestamp', $no_timestamp_default))
			{
				$created_at = \Cli::option('created-at', 'created_at');
				is_string($created_at) or $created_at = 'created_at';
				$properties .= "\n\t\t'".$created_at."',";

				$updated_at = \Cli::option('updated-at', 'updated_at');
				is_string($updated_at) or $updated_at = 'updated_at';
				$properties .= "\n\t\t'".$updated_at."',";

				$timestamp_properties = array($created_at.':'.$time_type.':null[1]', $updated_at.':'.$time_type.':null[1]');

				$args = array_merge($args, $timestamp_properties);
			}

			// Make sure an id is present
			strpos($properties, "'id'") === false and $properties = "'id',".$properties;

			if ( ! \Cli::option('no-properties'))
			{
				$contents = <<<CONTENTS
	protected static \$_properties = array(
		{$properties}
	);

CONTENTS;
			}

			$mysql_timestamp = (\Cli::option('mysql-timestamp')) ? 'true' : 'false';

			if ( ! \Cli::option('no-timestamp', $no_timestamp_default))
			{

				if(($created_at = \Cli::option('created-at')) and is_string($created_at))
				{
					$created_at = <<<CONTENTS

			'property' => '$created_at',
CONTENTS;
				}
				else
				{
					$created_at = '';
				}

				if(($updated_at = \Cli::option('updated-at')) and is_string($updated_at))
				{
					$updated_at = <<<CONTENTS

			'property' => '$updated_at',
CONTENTS;
				}
				else
				{
					$updated_at = '';
				}

				$contents .= <<<CONTENTS

	protected static \$_observers = array(
		'Orm\Observer_CreatedAt' => array(
			'events' => array('before_insert'),
			'mysql_timestamp' => $mysql_timestamp,$created_at
		),
		'Orm\Observer_UpdatedAt' => array(
			'events' => array('before_update'),
			'mysql_timestamp' => $mysql_timestamp,$updated_at
		),
	);
CONTENTS;

			}

			if (\Cli::option('soft-delete'))
			{
				if($deleted_at !== 'deleted_at')
				{
					$deleted_at = <<<CONTENTS

		'deleted_field' => '{$deleted_at}',
CONTENTS;
				}
				else
				{
					$deleted_at = '';
				}

				$contents .= <<<CONTENTS


	protected static \$_soft_delete = array(
		'mysql_timestamp' => $mysql_timestamp,$deleted_at
	);
CONTENTS;
			}
			elseif (\Cli::option('temporal'))
			{
				if($temporal_start !== 'temporal_start')
				{
					$start_column = <<<CONTENTS

		'start_column' => '{$temporal_start}',
CONTENTS;
				}
				else
				{
					$start_column = '';
				}

				if($temporal_end !== 'temporal_end')
				{
					$end_column = <<<CONTENTS

		'end_column' => '{$temporal_end}',
CONTENTS;
				}
				else
				{
					$end_column = '';
				}

				$contents .= <<<CONTENTS


	protected static \$_temporal = array(
		'mysql_timestamp' => $mysql_timestamp,$start_column$end_column
	);

	protected static \$_primary_key = array('id', '{$temporal_start}', '{$temporal_end}');
CONTENTS;
			}
			elseif (\Cli::option('nestedset'))
			{
				if($left_id !== 'left_id')
				{
					$left_field = <<<CONTENTS
		'left_field' => '{$left_id}',
CONTENTS;
				}
				else
				{
					$left_field = '';
				}

				if($right_id !== 'right_id')
				{
					$right_field = <<<CONTENTS
		'right_field' => '{$right_id}',
CONTENTS;
				}
				else
				{
					$right_field = '';
				}

				if($tree_id)
				{
					$tree_field = <<<CONTENTS
		'tree_field' => '{$tree_id}',
CONTENTS;
				}
				else
				{
					$tree_field = '';
				}

				if($title)
				{
					$title_field = <<<CONTENTS
		'title_field' => '{$title}',
CONTENTS;
				}
				else
				{
					$title_field = '';
				}

				if($read_only = \Cli::option('read-only') and is_string($read_only))
				{
					$read_only = explode(',', $read_only);
					$read_only = "'" . implode("', '", $read_only) . "'";
					$read_only = <<<CONTENTS
		'read_only' => array($read_only),
CONTENTS;
				}
				else
				{
					$read_only = '';
				}

				if (! empty($left_field) or ! empty($right_field) or ! empty($tree_field) or ! empty($title_field))
				{
					$fields = array($left_field, $right_field, $tree_field, $title_field, $read_only);
					$fields = array_filter($fields);
					$fields = implode("\n", $fields);

					$contents .= <<<CONTENTS


	protected static \$_tree = array(
$fields
	);
CONTENTS;
				}

			}

			$contents .= <<<CONTENTS


	protected static \$_table_name = '{$plural}';

CONTENTS;

			$model = '';
			if ( \Cli::option('soft-delete'))
			{
				if ($module)
				{
					$model .= <<<MODEL
<?php namespace {$module_namespace};

class Model_{$class_name} extends \Orm\Model_Soft
{
{$contents}
}

MODEL;
				}
				else
				{
					$model .= <<<MODEL
<?php

class Model_{$class_name} extends \Orm\Model_Soft
{
{$contents}
}

MODEL;
				}
			}
			elseif ( \Cli::option('temporal'))
			{
				$model .= <<<MODEL
<?php

class Model_{$class_name} extends \Orm\Model_Temporal
{
{$contents}
}

MODEL;
			}
			elseif ( \Cli::option('nestedset'))
			{
				$model .= <<<MODEL
<?php

class Model_{$class_name} extends \Orm\Model_Nestedset
{
{$contents}
}

MODEL;
			}
			else
			{
				if ($module)
				{
					$model .= <<<MODEL
<?php namespace {$module_namespace};

class Model_{$class_name} extends \Orm\Model
{
{$contents}
}

MODEL;
				}
				else
				{
					$model .= <<<MODEL
<?php

class Model_{$class_name} extends \Orm\Model
{
{$contents}
}

MODEL;
				}
			}
		}

		// Build the model
		static::create($filepath, $model, 'model');

		if ( ! \Cli::option('no-migration'))
		{
			if ( ! empty($args))
			{
				array_unshift($args, 'create_'.$plural);
				static::migration($args, false);
			}

			else
			{
				throw new \Exception('Not enough arguments to create this migration.');
			}
		}

		$build and static::build();
	}

	public static function module($args)
	{
		if ( ! ($module_name = strtolower(array_shift($args)) ) )
		{
			throw new Exception('No module name has been provided.');
		}

		if ($path = \Module::exists($module_name))
		{
			throw new Exception('A module named '.$module_name.' already exists at '.$path);
		}

		$module_paths = \Config::get('module_paths');
		$base = reset($module_paths);

		if (count($module_paths) > 1)
		{
			\Cli::write('Your app has multiple module paths defined. Please choose the appropriate path from the list below', 'yellow', 'blue');

			$options = array();
			foreach ($module_paths as $key => $path)
			{
				$idx = $key+1;
				\Cli::write('['.$idx.'] '.$path);
				$options[] = $idx;
			}

			$path_idx = \Cli::prompt('Please choose the desired module path', $options);

			$base = $module_paths[$path_idx - 1];
		}

		$module_path = $base.$module_name.DS;

		static::$create_folders[] = $module_path;
		static::$create_folders[] = $module_path.'classes/';

		if ( ($folders = \Cli::option('folders')) !== true )
		{
			$folders = explode(',', $folders);

			foreach ($folders as $folder)
			{
				static::$create_folders[] = $module_path.$folder;
			}
		}

		static::$create_folders && static::build();
	}

	public static function views($args, $subfolder, $build = true)
	{
		$controller = strtolower(array_shift($args));
		$controller_title = \Inflector::humanize($controller);

		$base_path = APPPATH;
		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module '.$module.' was not found within any of the defined module paths');
			}
		}

		$view_dir = $base_path.'views/'.trim(str_replace(array('_', '-'), DS, $controller), DS).DS;

		$args or $args = array('index');

		// Make the directory for these views to be store in
		is_dir($view_dir) or static::$create_folders[] = $view_dir;

		// Add the default template if it doesn't exist
		if ( ! is_file($app_template = $base_path.'views/template.php') )
		{
			static::create($app_template, file_get_contents(\Package::exists('oil').'views/scaffolding/template.php'), 'view');
		}

		$subnav = '';
		foreach($args as $nav_item)
		{
			$subnav .= "\t<li class='<?php echo Arr::get(\$subnav, \"{$nav_item}\" ); ?>'><?php echo Html::anchor('{$controller}/{$nav_item}','".\Inflector::humanize($nav_item)."');?></li>\n";
		}

		foreach ($args as $action)
		{
			$view_title = (\Cli::option('with-presenter') or \Cli::option('with-viewmodel')) ? '<?php echo $content; ?>' : \Inflector::humanize($action);

			$view = <<<VIEW
<ul class="nav nav-pills">
{$subnav}
</ul>
<p>{$view_title}</p>
VIEW;

			// Generate with test?
 			$with_test = \Cli::option('with-test');
            		if ($with_test) {
               			static::_create_test('View', $controller, $base_path, $nav_item);
			}

			// Create this view
			static::create($view_dir.$action.'.php', $view, 'view');
		}

		$build and static::build();
	}

	public static function migration($args, $build = true)
	{
		// Get the migration name
		$migration_name = \Str::lower(str_replace(array('-', '/'), '_', array_shift($args)));

		if (empty($migration_name) or strpos($migration_name, ':'))
		{
			throw new Exception("Command is invalid.".PHP_EOL."\tphp oil g migration <migrationname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]");
		}

		$base_path = APPPATH;

		// Check if a migration with this name already exists
		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module '.$module.' was not found within any of the defined module paths');
			}
		}

		$migrations = new \GlobIterator($base_path.'migrations/*_'.$migration_name.'*');

		try
		{
			$duplicates = array();
			foreach($migrations as $migration)
			{
				// check if it's really a duplicate
				$part = explode('_', basename($migration->getFilename(), '.php'), 2);
				if ($part[1] != $migration_name)
				{
					$part = substr($part[1], strlen($migration_name)+1);
					if ( ! is_numeric($part))
					{
						// not a numbered suffix, but the same base classname
						continue;
					}
				}

				$duplicates[] = $migration->getPathname();
			}
		}
		catch (\LogicException $e)
		{
			throw new Exception("Unable to read existing migrations. Path does not exist, or you may have an 'open_basedir' defined");
		}

		if (count($duplicates) > 0)
		{
			// Don't override a file
			if (\Cli::option('s', \Cli::option('skip')) === true)
			{
				return;
			}

			// Tear up the file path and name to get the last duplicate
			$file_name = pathinfo(end($duplicates), PATHINFO_FILENAME);

			// Override the (most recent) migration with the same name by using its number
			if (\Cli::option('f', \Cli::option('force')) === true)
			{
				list($number) = explode('_', $file_name);
			}

			// Name clashes but this is done by hand. Assume they know what they're doing and just increment the file
			elseif (static::$scaffolding === false)
			{
				// Increment the name of this
				$migration_name = \Str::increment(substr($file_name, 4), 2);
			}
		}

		// See if the action exists
		$methods = get_class_methods(__NAMESPACE__ . '\Generate_Migration_Actions');

		// For empty migrations that dont have actions
		$migration = array('', '');

		// Loop through the actions and act on a matching action appropriately
		foreach ($methods as $method_name)
		{
			// If the miration name starts with the name of the action method
			if (substr($migration_name, 0, strlen($method_name)) === $method_name)
			{
				/**
				 *	Create an array of the subject the migration is about
				 *
				 *	- In a migration named 'create_users' the subject is 'users' since thats what we want to create
				 *		So it would be the second object in the array
				 *			array(false, 'users')
				 *
				 *	- In a migration named 'add_name_to_users' the object is 'name' and the subject is 'users'.
				 *		So again 'users' would be the second object, but 'name' would be the first
				 *			array('name', 'users')
				 *
				 */
				$subjects = array(false, false);
				$matches = explode('_', str_replace($method_name . '_', '', $migration_name));

				// create_{table}
				if (count($matches) == 1)
				{
					$subjects = array(false, $matches[0]);
				}

				// add_{field}_to_{table}
				elseif (count($matches) == 3 && $matches[1] == 'to')
				{
					$subjects = array($matches[0], $matches[2]);
				}

				// delete_{field}_from_{table}
				elseif (count($matches) == 3 && $matches[1] == 'from')
				{
					$subjects = array($matches[0], $matches[2]);
				}

				// rename_field_{field}_to_{field}_in_{table} (with underscores in field names)
				elseif (count($matches) >= 5 && in_array('to', $matches) && in_array('in', $matches))
				{
					$subjects = array(
					 implode('_', array_slice($matches, array_search('in', $matches)+1)),
					 implode('_', array_slice($matches, 0, array_search('to', $matches))),
					 implode('_', array_slice($matches, array_search('to', $matches)+1, array_search('in', $matches)-array_search('to', $matches)-1)),
				  );
				}

				// rename_table
				elseif ($method_name == 'rename_table')
				{
					$subjects = array(
					 implode('_', array_slice($matches, 0, array_search('to', $matches))),
					 implode('_', array_slice($matches, array_search('to', $matches)+1)),
				  );
				}

				// create_{table} or drop_{table} (with underscores in table name)
				elseif (count($matches) !== 0)
				{
					$name = str_replace(array('create_', 'add_', 'drop_', '_to_'), array('create-', 'add-', 'drop-', '-to-'), $migration_name);

    				if (preg_match('/^(create|drop|add)\-([a-z0-9\_]*)(\-to\-)?([a-z0-9\_]*)?$/i', $name, $deep_matches))
    				{
    					switch ($deep_matches[1])
    					{
    						case 'create' :
    						case 'drop' :
    							$subjects = array(false, $deep_matches[2]);
    						break;

    						case 'add' :
    							$subjects = array($deep_matches[2], $deep_matches[4]);
    						break;
    					}
    				}
				}

				// There is no subject here so just carry on with a normal empty migration
				else
				{
					break;
				}

				// We always pass in fields to a migration, so lets sort them out here.
				$fields = array();
				foreach ($args as $field)
				{
					$field_array = array();

					// Each paramater for a field is seperated by the : character
					$parts = explode(":", $field);

					// We must have the 'name:type' if nothing else!
					if (count($parts) >= 2)
					{
						$field_array['name'] = array_shift($parts);
						foreach ($parts as $part_i => $part)
						{
							preg_match('/([a-z0-9_-]+)(?:\[([0-9a-z_\-\,\s]+)\])?/i', $part, $part_matches);
							array_shift($part_matches);

							if (count($part_matches) < 1)
							{
								// Move onto the next part, something is wrong here...
								continue;
							}

							$option_name = ''; // This is the name of the option to be passed to the action in a field
							$option = $part_matches;

							// The first option always has to be the field type
							if ($part_i == 0)
							{
								$option_name = 'type';
								$type = $option[0];
								if ($type === 'string')
								{
									$type = 'varchar';
								}
								elseif ($type === 'integer')
								{
									$type = 'int';
								}

								if ( ! in_array($type, array('text', 'blob', 'datetime', 'date', 'timestamp', 'time')))
								{
									if ( ! isset($option[1]) || $option[1] == NULL)
									{
										if (isset(self::$_default_constraints[$type]))
										{
											$field_array['constraint'] = self::$_default_constraints[$type];
										}
									}
									else
									{
										// should support field_name:enum[value1,value2]
										if ($type === 'enum')
										{
											$values = explode(',', $option[1]);
											$option[1] = '"'.implode('","', $values).'"';

											$field_array['constraint'] = $option[1];
										}
										// should support field_name:decimal[10,2]
										elseif (in_array($type, array('decimal', 'float')))
										{
											$field_array['constraint'] = $option[1];
										}
										else
										{
											$field_array['constraint'] = (int) $option[1];
										}

									}
								}
								$option = $type;
							}
							else
							{
								// This allows you to put any number of :option or :option[val] into your field and these will...
								// ... always be passed through to the action making it really easy to add extra options for a field
								$option_name = array_shift($option);
								if (count($option) > 0)
								{
									$option = $option[0];
								}
								else
								{
									$option = true;
								}
							}

							// deal with some special cases
							switch ($option_name)
							{
								case 'auto_increment':
								case 'null':
								case 'unsigned':
									$option = (bool) $option;
									break;
							}

							$field_array[$option_name] = $option;

						}
						$fields[] = $field_array;
					}
					else
					{
						// Invalid field passed in
						continue;
					}
				}

				// Call the magic action which returns an array($up, $down) for the migration
				$migration = call_user_func(__NAMESPACE__ . "\Generate_Migration_Actions::{$method_name}", $subjects, $fields);
			}
		}

		// Build the migration
		list($up, $down)=$migration;

		// If we don't have any, bail out
		if (empty($up) and empty($down))
		{
			throw new \Exception('No migration could be generated. Please verify your command syntax.');
			exit;
		}

		$migration_name = ucfirst(strtolower($migration_name));

		$migration = <<<MIGRATION
<?php

namespace Fuel\Migrations;

class {$migration_name}
{
	public function up()
	{
{$up}
	}

	public function down()
	{
{$down}
	}
}
MIGRATION;

		$number = isset($number) ? $number : static::_find_migration_number();
		$filepath = $base_path.'migrations/'.$number.'_'.strtolower($migration_name).'.php';

		static::create($filepath, $migration, 'migration');

		$build and static::build();
	}

	public static function task($args, $build = true)
	{

		if ( ! ($name = \Str::lower(array_shift($args))))
		{
			throw new Exception('No task name was provided.');
		}

		if (empty($args))
		{
			\Cli::write("\tNo tasks actions have been provided, the TASK will only create default task.", 'red');
		}

		$args or $args = array('index');

		// Uppercase each part of the class name and remove hyphens
		$class_name = \Inflector::classify($name, false);
		$filename = trim(str_replace(array('_', '-'), DS, $name), DS);

		$base_path = APPPATH;

		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module '.$module.' was not found within any of the defined module paths');
			}
		}

		$filepath = $base_path.'tasks'.DS.$filename.'.php';

		$action_str = '';

		foreach ($args as $action)
		{
			$task_path = '\\'.\Inflector::humanize($name).'\\'.\Inflector::humanize($action);

			if (!ctype_alpha($action[0])) {
				throw new Exception('An action does not start with alphabet character.  ABORTING');
			}

			$action_str .= '
	/**
	 * This method gets ran when a valid method name is not used in the command.
	 *
	 * Usage (from command line):
	 *
	 * php oil r '.$name.':'.$action.' "arguments"
	 *
	 * @return string
	 */
	public function '.$action.'($args = NULL)
	{
		echo "\n===========================================";
		echo "\nRunning task ['.\Inflector::humanize($name).':'. \Inflector::humanize($action) . ']";
		echo "\n-------------------------------------------\n\n";

		/***************************
		 Put in TASK DETAILS HERE
		 **************************/
	}'.PHP_EOL;

			$message = \Cli::color("\t\tPreparing task method [", 'green');
			$message .= \Cli::color(\Inflector::humanize($action), 'cyan');
			$message .= \Cli::color("]", 'green');
			\Cli::write($message);
		}

		// Default RUN task action
		$action = 'run';
		$default_action_str = '
	/**
	 * This method gets ran when a valid method name is not used in the command.
	 *
	 * Usage (from command line):
	 *
	 * php oil r '.$name.'
	 *
	 * @return string
	 */
	public function run($args = NULL)
	{
		echo "\n===========================================";
		echo "\nRunning DEFAULT task ['.\Inflector::humanize($name).':'. \Inflector::humanize($action) . ']";
		echo "\n-------------------------------------------\n\n";

		/***************************
		 Put in TASK DETAILS HERE
		 **************************/
	}'.PHP_EOL;

		// Build Controller
		$task_class = <<<CONTROLLER
<?php

namespace Fuel\Tasks;

class {$class_name}
{
{$default_action_str}

{$action_str}
}
/* End of file tasks/{$name}.php */

CONTROLLER;

		// Write controller
		static::create($filepath, $task_class, 'tasks');

		$build and static::build();
	}

	public static function help()
	{
		$output = <<<HELP
Usage:
  php oil [g|generate] [config|controller|views|model|migration|scaffold|admin|task|package] [options]

Runtime options:
  -f, [--force]    # Overwrite files that already exist
  -s, [--skip]     # Skip files that already exist
  -q, [--quiet]    # Supress status output
  -t, [--speak]    # Speak errors in a robot voice

Description:
  The 'oil' command can be used to generate MVC components, database migrations
  and run specific tasks.

Examples:
  php oil generate controller <controllername> [<action1> |<action2> |..]
  php oil g model <modelname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]
  php oil g migration <migrationname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]
  php oil g scaffold <modelname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]
  php oil g scaffold/template_subfolder <modelname> [<fieldname1>:<type1> |<fieldname2>:<type2> |..]
  php oil g config <filename> [<key1>:<value1> |<key2>:<value2> |..]
  php oil g task <taskname> [<cmd1> |<cmd2> |..]
  php oil g package <packagename>

Note that the next two lines are equivalent:
  php oil g scaffold <modelname> ...
  php oil g scaffold/orm <modelname> ...

Documentation:
  http://docs.fuelphp.com/packages/oil/generate.html
HELP;

		\Cli::write($output);
	}

	public static function package($args, $build = true)
	{
		$name       = str_replace(array('/', '_', '-'), '', \Str::lower(array_shift($args)));
		$class_name = ucfirst($name);
		$vcs        = \Cli::option('vcs', \Cli::option('v', false));
		$path       = \Cli::option('path', \Cli::option('p', PKGPATH));
		$drivers    = \Cli::option('drivers', \Cli::option('d', ''));

		if (empty($name))
		{
			throw new \Exception('No package name has been provided.');
		}

		if ( ! in_array($path, \Config::get('package_paths')) and ! in_array(realpath($path), \Config::get('package_paths')) )
		{
			throw new \Exception('Given path is not a valid package path.');
		}

		\Str::ends_with($path, DS) or $path .= DS;
		$path .= $name . DS;

		if (is_dir($path))
		{
			throw new \Exception('Package already exists.');
		}

		if ($vcs)
		{
			$output = <<<COMPOSER
{
	"name": "fuel/{$name}",
	"type": "fuel-package",
	"description": "{$class_name} package",
	"keywords": [""],
	"homepage": "http://fuelphp.com",
	"license": "MIT",
	"authors": [
		{
			"name": "AUTHOR",
			"email": "AUTHOR@example.com"
		}
	],
	"require": {
		"composer/installers": "~1.0"
	},
	"extra": {
		"installer-name": "{$name}"
	}
}

COMPOSER;

			static::create($path . 'composer.json', $output);

			$output = <<<README
# {$class_name} package
Here comes some description

README;

			static::create($path . 'README.md', $output);
		}

		if ( ! empty($drivers))
		{
			$drivers === true or $drivers = explode(',', $drivers);

			$output = <<<CLASS
<?php

namespace {$class_name};

class {$class_name}Exception extends \FuelException {}

class {$class_name}
{
	/**
	 * loaded instance
	 */
	protected static \$_instance = null;

	/**
	 * array of loaded instances
	 */
	protected static \$_instances = array();

	/**
	 * Default config
	 * @var array
	 */
	protected static \$_defaults = array();

	/**
	 * Init
	 */
	public static function _init()
	{
		\Config::load('{$name}', true);
	}

	/**
	 * {$class_name} driver forge.
	 *
	 * @param	string			\$instance		Instance name
	 * @param	array			\$config		Extra config array
	 * @return  {$class_name} instance
	 */
	public static function forge(\$instance = 'default', \$config = array())
	{
		is_array(\$config) or \$config = array('driver' => \$config);

		\$config = \Arr::merge(static::\$_defaults, \Config::get('{$name}', array()), \$config);

		\$class = '\\{$class_name}\\{$class_name}_' . ucfirst(strtolower(\$config['driver']));

		if( ! class_exists(\$class, true))
		{
			throw new \FuelException('Could not find {$class_name} driver: ' . ucfirst(strtolower(\$config['driver']));
		}

		\$driver = new \$class(\$config);

		static::\$_instances[\$instance] = \$driver;

		return \$driver;
	}

	/**
	 * Return a specific driver, or the default instance (is created if necessary)
	 *
	 * @param   string  \$instance
	 * @return  {$class_name} instance
	 */
	public static function instance(\$instance = null)
	{
		if (\$instance !== null)
		{
			if ( ! array_key_exists(\$instance, static::\$_instances))
			{
				return false;
			}

			return static::\$_instances[\$instance];
		}

		if (static::\$_instance === null)
		{
			static::\$_instance = static::forge();
		}

		return static::\$_instance;
	}
}

CLASS;

			static::create($path . 'classes' . DS . $name . '.php', $output);

			$output = <<<DRIVER
<?php

namespace {$class_name};

abstract class {$class_name}_Driver
{
	/**
	* Driver config
	* @var array
	*/
	protected \$config = array();

	/**
	* Driver constructor
	*
	* @param array \$config driver config
	*/
	public function __construct(array \$config = array())
	{
		\$this->config = \$config;
	}

	/**
	* Get a driver config setting.
	*
	* @param string \$key the config key
	* @param mixed  \$default the default value
	* @return mixed the config setting value
	*/
	public function get_config(\$key, \$default = null)
	{
		return \Arr::get(\$this->config, \$key, \$default);
	}

	/**
	* Set a driver config setting.
	*
	* @param string \$key the config key
	* @param mixed \$value the new config value
	* @return object \$this for chaining
	*/
	public function set_config(\$key, \$value)
	{
		\Arr::set(\$this->config, \$key, \$value);

		return \$this;
	}
}

DRIVER;

			static::create($path . 'classes' . DS . $name . DS . 'driver.php', $output);

			$bootstrap =  "\n\t'{$class_name}\\\\{$class_name}_Driver' => __DIR__ . '/classes/{$name}/driver.php',";
			if (is_array($drivers))
			{
				foreach ($drivers as $driver)
				{
					$driver = \Str::lower($driver);
					$driver_name = ucfirst($driver);
					$output = <<<CLASS
<?php

namespace {$class_name};

class {$class_name}_{$driver_name}  extends {$class_name}_Driver
{
	/**
	* Driver specific functions
	*/
}

CLASS;
					$bootstrap .= "\n\t'{$class_name}\\\\{$class_name}_{$driver_name}' => __DIR__ . '/classes/{$name}/{$driver}.php',";
					static::create($path . 'classes' . DS . $name . DS . $driver . '.php', $output);
				}
			}
		}
		else
		{
			$output = <<<CLASS
<?php

namespace {$class_name};

class {$class_name}Exception extends \FuelException {}

class {$class_name}
{
	/**
	 * Default config
	 * @var array
	 */
	protected static \$_defaults = array();

	/**
	* Driver config
	* @var array
	*/
	protected \$config = array();

	/**
	 * Init
	 */
	public static function _init()
	{
		\Config::load('{$name}', true);
	}

	/**
	 * {$class_name} driver forge.
	 *
	 * @param	array			\$config		Config array
	 * @return  {$class_name}
	 */
	public static function forge(\$config = array())
	{
		\$config = \Arr::merge(static::\$_defaults, \Config::get('{$name}', array()), \$config);

		\$class = new static(\$config);

		return \$class;
	}

	/**
	* Driver constructor
	*
	* @param array \$config driver config
	*/
	public function __construct(array \$config = array())
	{
		\$this->config = \$config;
	}

	/**
	* Get a config setting.
	*
	* @param string \$key the config key
	* @param mixed  \$default the default value
	* @return mixed the config setting value
	*/
	public function get_config(\$key, \$default = null)
	{
		return \Arr::get(\$this->config, \$key, \$default);
	}

	/**
	* Set a config setting.
	*
	* @param string \$key the config key
	* @param mixed \$value the new config value
	* @return object \$this for chaining
	*/
	public function set_config(\$key, \$value)
	{
		\Arr::set(\$this->config, \$key, \$value);

		return \$this;
	}
}

CLASS;

			static::create($path . 'classes' . DS . $name . '.php', $output);

			$bootstrap = "";
		}

			$output = <<<CONFIG
<?php

return array(

);

CONFIG;

			static::create($path . 'config' . DS . $name . '.php', $output);

		$output = <<<CLASS
<?php

Autoloader::add_core_namespace('{$class_name}');

Autoloader::add_classes(array(
	'{$class_name}\\\\{$class_name}' => __DIR__ . '/classes/{$name}.php',
	'{$class_name}\\\\{$class_name}Exception' => __DIR__ . '/classes/{$name}.php',
{$bootstrap}
));

CLASS;
		static::create($path . 'bootstrap.php', $output);

		$build and static::build();
	}

	public static function create($filepath, $contents, $type = 'file')
	{
		$directory = dirname($filepath);
		is_dir($directory) or static::$create_folders[] = $directory;

		// Check if a file exists then work out how to react
		if (is_file($filepath))
		{
			// Don't override a file
			if (\Cli::option('s', \Cli::option('skip')) === true)
			{
				// Don't bother trying to make this, carry on camping
				return;
			}

			// If we aren't skipping it, tell em to use -f
			if (\Cli::option('f', \Cli::option('force')) === null)
			{
				throw new Exception($filepath .' already exists, use -f or --force to override.');
				exit;
			}
		}

		static::$create_files[] = array(
			'path' => $filepath,
			'contents' => $contents,
			'type' => $type,
		);
	}

	public static function build()
	{
		foreach (static::$create_folders as $folder)
		{
			is_dir($folder) or mkdir($folder, 0755, TRUE);
		}

		$result = true;

		foreach (static::$create_files as $file)
		{
			\Cli::write("\tCreating {$file['type']}: {$file['path']}", 'green');

			if ( ! $handle = @fopen($file['path'], 'w+'))
			{
				throw new Exception('Cannot open file: '. $file['path']);
			}

			$result = @fwrite($handle, $file['contents']);

			// Write $somecontent to our opened file.
			if ($result === false)
			{
				throw new Exception('Cannot write to file: '. $file['path']);
			}

			@fclose($handle);

			@chmod($file['path'], 0666);
		}

		return $result;
	}

	public static function class_name($name)
	{
		return str_replace(array(' ', '-'), '_', ucwords(str_replace('_', ' ', $name)));
	}

	// Helper methods

	private static function _find_migration_number()
	{
		$base_path = APPPATH;

		if ($module = \Cli::option('module'))
		{
			if ( ! ($base_path = \Module::exists($module)) )
			{
				throw new Exception('Module ' . $module . ' was not found within any of the defined module paths');
			}
		}

		$files = new \GlobIterator($base_path .'migrations/*_*.php');

		try
		{
			$migrations = array();
			foreach($files as $file)
			{
				$migrations[] = $file->getPathname();
			}
			sort($migrations);
			list($last) = explode('_', basename(end($migrations)));
		}
		catch (\LogicException $e)
		{
			throw new Exception("Unable to read existing migrations. Path does not exist, or you may have an 'open_basedir' defined");
		}

		return str_pad($last + 1, 3, '0', STR_PAD_LEFT);
	}

	private static function _update_current_version($version)
	{
		if (is_file($app_path = APPPATH.'config'.DS.'migrations.php'))
		{
			$contents = file_get_contents($app_path);
		}
		elseif (is_file($core_path = COREPATH.'config'.DS.'migrations.php'))
		{
			$contents = file_get_contents($core_path);
		}
		else
		{
			throw new \Exception('Config file core/config/migrations.php');
			exit;
		}

		$contents = preg_replace("#('version'[ \t]+=>)[ \t]+([0-9]+),#i", "$1 $version,", $contents);

		static::create($app_path, $contents, 'config');
	}

	private static function _create_test($type, $class_name, $base_path, $nav_item = '')
	{
		$filepath = $base_path.strtolower('tests'.DS.$type.DS.ucwords($class_name));
		if ( ! empty($nav_item) and $type === 'View')
		{
			$filepath = $filepath.DS.strtolower($nav_item);
			$class_name = $class_name.'_'.ucwords($nav_item);
		}
		$output = <<<TEST
<?php

class Test_{$type}_{$class_name} extends TestCase
{
}
TEST;

		static::create($filepath.'.php', $output, 'test');
	}
}

/* End of file oil/classes/generate.php */