<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\gii\generators\crud;

use Yii;
use yii\db\ActiveRecord;
use yii\db\Schema;
use yii\gii\CodeFile;
use yii\helpers\Inflector;
use yii\web\Controller;

/**
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Generator extends \yii\gii\Generator
{
	public $modelClass;
	public $moduleID;
	public $controllerClass;
	public $baseControllerClass = 'yii\web\Controller';
	public $indexWidgetType = 'grid';
	public $searchModelClass;

	public function getName()
	{
		return 'CRUD Generator';
	}

	public function getDescription()
	{
		return 'This generator generates a controller and views that implement CRUD (Create, Read, Update, Delete)
			operations for the specified data model.';
	}

	public function rules()
	{
		return array_merge(parent::rules(), [
			[['moduleID', 'controllerClass', 'modelClass', 'searchModelClass', 'baseControllerClass'], 'filter', 'filter' => 'trim'],
			[['modelClass', 'searchModelClass', 'controllerClass', 'baseControllerClass', 'indexWidgetType'], 'required'],
			[['searchModelClass'], 'compare', 'compareAttribute' => 'modelClass', 'operator' => '!==', 'message' => 'Search Model Class must not be equal to Model Class.'],
			[['modelClass', 'controllerClass', 'baseControllerClass', 'searchModelClass'], 'match', 'pattern' => '/^[\w\\\\]*$/', 'message' => 'Only word characters and backslashes are allowed.'],
			[['modelClass'], 'validateClass', 'params' => ['extends' => ActiveRecord::className()]],
			[['baseControllerClass'], 'validateClass', 'params' => ['extends' => Controller::className()]],
			[['controllerClass'], 'match', 'pattern' => '/Controller$/', 'message' => 'Controller class name must be suffixed with "Controller".'],
			[['controllerClass', 'searchModelClass'], 'validateNewClass'],
			[['indexWidgetType'], 'in', 'range' => ['grid', 'list']],
			[['modelClass'], 'validateModelClass'],
			[['moduleID'], 'validateModuleID'],
		]);
	}

	public function attributeLabels()
	{
		return array_merge(parent::attributeLabels(), [
			'modelClass' => 'Model Class',
			'moduleID' => 'Module ID',
			'controllerClass' => 'Controller Class',
			'baseControllerClass' => 'Base Controller Class',
			'indexWidgetType' => 'Widget Used in Index Page',
			'searchModelClass' => 'Search Model Class',
		]);
	}

	/**
	 * @inheritdoc
	 */
	public function hints()
	{
		return [
			'modelClass' => 'This is the ActiveRecord class associated with the table that CRUD will be built upon.
				You should provide a fully qualified class name, e.g., <code>app\models\Post</code>.',
			'controllerClass' => 'This is the name of the controller class to be generated. You should
				provide a fully qualified namespaced class, .e.g, <code>app\controllers\PostController</code>.',
			'baseControllerClass' => 'This is the class that the new CRUD controller class will extend from.
				You should provide a fully qualified class name, e.g., <code>yii\web\Controller</code>.',
			'moduleID' => 'This is the ID of the module that the generated controller will belong to.
				If not set, it means the controller will belong to the application.',
			'indexWidgetType' => 'This is the widget type to be used in the index page to display list of the models.
				You may choose either <code>GridView</code> or <code>ListView</code>',
			'searchModelClass' => 'This is the class representing the data being collected in the search form.
			 	A fully qualified namespaced class name is required, e.g., <code>app\models\search\PostSearch</code>.',
		];
	}

	public function requiredTemplates()
	{
		return ['controller.php'];
	}

	/**
	 * @inheritdoc
	 */
	public function stickyAttributes()
	{
		return ['baseControllerClass', 'moduleID', 'indexWidgetType'];
	}

	public function validateModelClass()
	{
		/** @var ActiveRecord $class */
		$class = $this->modelClass;
		$pk = $class::primaryKey();
		if (empty($pk)) {
			$this->addError('modelClass', "The table associated with $class must have primary key(s).");
		}
	}

	public function validateModuleID()
	{
		if (!empty($this->moduleID)) {
			$module = Yii::$app->getModule($this->moduleID);
			if ($module === null) {
				$this->addError('moduleID', "Module '{$this->moduleID}' does not exist.");
			}
		}
	}

	/**
	 * @inheritdoc
	 */
	public function generate()
	{
		$controllerFile = Yii::getAlias('@' . str_replace('\\', '/', ltrim($this->controllerClass, '\\')) . '.php');
		$searchModel = Yii::getAlias('@' . str_replace('\\', '/', ltrim($this->searchModelClass, '\\') . '.php'));
		$files = [
			new CodeFile($controllerFile, $this->render('controller.php')),
			new CodeFile($searchModel, $this->render('search.php')),
		];

		$viewPath = $this->getViewPath();
		$templatePath = $this->getTemplatePath() . '/views';
		foreach (scandir($templatePath) as $file) {
			if (is_file($templatePath . '/' . $file) && pathinfo($file, PATHINFO_EXTENSION) === 'php') {
				$files[] = new CodeFile("$viewPath/$file", $this->render("views/$file"));
			}
		}


		return $files;
	}

	/**
	 * @return string the controller ID (without the module ID prefix)
	 */
	public function getControllerID()
	{
		$pos = strrpos($this->controllerClass, '\\');
		$class = substr(substr($this->controllerClass, $pos + 1), 0, -10);
		return Inflector::camel2id($class);
	}

	/**
	 * @return string the action view file path
	 */
	public function getViewPath()
	{
		$module = empty($this->moduleID) ? Yii::$app : Yii::$app->getModule($this->moduleID);
		return $module->getViewPath() . '/' . $this->getControllerID() ;
	}

	public function getNameAttribute()
	{
		/** @var \yii\db\ActiveRecord $class */
		$class = $this->modelClass;
		foreach ($class::getTableSchema()->columnNames as $name) {
			if (!strcasecmp($name, 'name') || !strcasecmp($name, 'title')) {
				return $name;
			}
		}
		$pk = $class::primaryKey();
		return $pk[0];
	}

	/**
	 * @param string $attribute
	 * @return string
	 */
	public function generateActiveField($attribute)
	{
		$tableSchema = $this->getTableSchema();
		if (!isset($tableSchema->columns[$attribute])) {
			return "\$form->field(\$model, '$attribute');";
		}
		$column = $tableSchema->columns[$attribute];
		if ($column->phpType === 'boolean') {
			return "\$form->field(\$model, '$attribute')->checkbox()";
		} elseif ($column->type === 'text') {
			return "\$form->field(\$model, '$attribute')->textarea(['rows' => 6])";
		} else {
			if (preg_match('/^(password|pass|passwd|passcode)$/i', $column->name)) {
				$input = 'passwordInput';
			} else {
				$input = 'textInput';
			}
			if ($column->phpType !== 'string' || $column->size === null) {
				return "\$form->field(\$model, '$attribute')->$input()";
			} else {
				return "\$form->field(\$model, '$attribute')->$input(['maxlength' => $column->size])";
			}
		}
	}

	/**
	 * @param string $attribute
	 * @return string
	 */
	public function generateActiveSearchField($attribute)
	{
		$tableSchema = $this->getTableSchema();
		$column = $tableSchema->columns[$attribute];
		if ($column->phpType === 'boolean') {
			return "\$form->field(\$model, '$attribute')->checkbox()";
		} else {
			return "\$form->field(\$model, '$attribute')";
		}
	}

	/**
	 * @param \yii\db\ColumnSchema $column
	 * @return string
	 */
	public function generateColumnFormat($column)
	{
		if ($column->phpType === 'boolean') {
			return 'boolean';
		} elseif ($column->type === 'text') {
			return 'ntext';
		} elseif (stripos($column->name, 'time') !== false && $column->phpType === 'integer') {
			return 'datetime';
		} elseif (stripos($column->name, 'email') !== false) {
			return 'email';
		} elseif (stripos($column->name, 'url') !== false) {
			return 'url';
		} else {
			return 'text';
		}
	}

	/**
	 * Generates validation rules for the search model.
	 * @return array the generated validation rules
	 */
	public function generateSearchRules()
	{
		$table = $this->getTableSchema();
		$types = [];
		foreach ($table->columns as $column) {
			switch ($column->type) {
				case Schema::TYPE_SMALLINT:
				case Schema::TYPE_INTEGER:
				case Schema::TYPE_BIGINT:
					$types['integer'][] = $column->name;
					break;
				case Schema::TYPE_BOOLEAN:
					$types['boolean'][] = $column->name;
					break;
				case Schema::TYPE_FLOAT:
				case Schema::TYPE_DECIMAL:
				case Schema::TYPE_MONEY:
					$types['number'][] = $column->name;
					break;
				case Schema::TYPE_DATE:
				case Schema::TYPE_TIME:
				case Schema::TYPE_DATETIME:
				case Schema::TYPE_TIMESTAMP:
				default:
					$types['safe'][] = $column->name;
					break;
			}
		}

		$rules = [];
		foreach ($types as $type => $columns) {
			$rules[] = "['" . implode(', ', $columns) . "', '$type']";
		}

		return $rules;
	}

	public function getSearchAttributes()
	{
		return $this->getTableSchema()->getColumnNames();
	}

	/**
	 * Generates the attribute labels for the search model.
	 * @return array the generated attribute labels (name => label)
	 */
	public function generateSearchLabels()
	{
		$table = $this->getTableSchema();
		$labels = [];
		foreach ($table->columns as $column) {
			if (!strcasecmp($column->name, 'id')) {
				$labels[$column->name] = 'ID';
			} else {
				$label = Inflector::camel2words($column->name);
				if (strcasecmp(substr($label, -3), ' id') === 0) {
					$label = substr($label, 0, -3) . ' ID';
				}
				$labels[$column->name] = $label;
			}
		}
		return $labels;
	}

	public function generateSearchConditions()
	{
		$table = $this->getTableSchema();
		$conditions = [];
		foreach ($table->columns as $column) {
			switch ($column->type) {
				case Schema::TYPE_SMALLINT:
				case Schema::TYPE_INTEGER:
				case Schema::TYPE_BIGINT:
				case Schema::TYPE_BOOLEAN:
				case Schema::TYPE_FLOAT:
				case Schema::TYPE_DECIMAL:
				case Schema::TYPE_MONEY:
				case Schema::TYPE_DATE:
				case Schema::TYPE_TIME:
				case Schema::TYPE_DATETIME:
				case Schema::TYPE_TIMESTAMP:
					$conditions[] = "\$this->addCondition(\$query, '{$column->name}');";
					break;
				default:
					$conditions[] = "\$this->addCondition(\$query, '{$column->name}', true);";
					break;
			}
		}

		return $conditions;
	}

	public function generateUrlParams()
	{
		/** @var ActiveRecord $class */
		$class = $this->modelClass;
		$pks = $class::primaryKey();
		if (count($pks) === 1) {
			return "'id' => \$model->{$pks[0]}";
		} else {
			$params = [];
			foreach ($pks as $pk) {
				$params[] = "'$pk' => \$model->$pk";
			}
			return implode(', ', $params);
		}
	}

	public function generateActionParams()
	{
		/** @var ActiveRecord $class */
		$class = $this->modelClass;
		$pks = $class::primaryKey();
		if (count($pks) === 1) {
			return '$id';
		} else {
			return '$' . implode(', $', $pks);
		}
	}

	public function generateActionParamComments()
	{
		$table = $this->getTableSchema();
		/** @var ActiveRecord $class */
		$class = $this->modelClass;
		$pks = $class::primaryKey();
		if (count($pks) === 1) {
			return ['@param ' . $table->columns[$pks[0]]->phpType . ' $id'];
		} else {
			$params = [];
			foreach ($pks as $pk) {
				$params[] = '@param ' . $table->columns[$pk]->phpType . ' $' . $pk;
			}
			return $params;
		}
	}

	public function getTableSchema()
	{
		/** @var ActiveRecord $class */
		$class = $this->modelClass;
		return $class::getTableSchema();
	}
}