<?php

  class mw_env_run extends mw_env{

    public $etat;
    public $controllers;

    public function user(){
      if(!($data = $this->data())) return array();
      return $data->get_session_user();
    }

    public function set_etat($etat, $valid_role = true){
      if(($this->etat = $this->valid_etat($etat)) !== false){
        if(!$valid_role || $this->action_allowed($this->etat, false)){
          return $this->etat;
        }
        else{
          $etat = $this->etat;
          $this->erreur("Vous n'avez pas le role requis pour effectuer cette action");
          $this->call_observers("action_permission_denied", array("etat" => $etat));
        }
      }
      else $this->erreur("etat invalide");
      return false;
    }

    public function valid_etat($etat){
      $_etat = array(
        "mod" => "",
        "controller" => "",
        "action" => ""
      );
      if(is_array($etat)){
        $_etat["mod"] = isset($etat["mod"]) ? $etat["mod"] : "";
        $_etat["controller"] = isset($etat["controller"]) ? $etat["controller"] : "";
        $_etat["action"] = isset($etat["action"]) ? $etat["action"] : "";
      }
      else{
        $etat = explode("/", $etat);
        foreach($etat as $etat_item){
          if($etat_item){
            if(!$_etat["mod"]) $_etat["mod"] = $etat_item;
            else{
              if(!$_etat["controller"]) $_etat["controller"] = $etat_item;
              else{
                if(!$_etat["action"]) $_etat["action"] = $etat_item;
                break;
              }
            }
          }
        }
      }
      if(!$_etat["mod"]){
        $_etat["mod"] = "index";
        $_etat["controller"] = "index";
        $_etat["action"] = "index";
      }
      else{
        if(!$_etat["controller"]){
          $_etat["controller"] = "index";
          $_etat["action"] = "index";
        }
        else{
          if(!$_etat["action"]) $_etat["action"] = "index";
        }
      }
      if(
           is_array($_etat)
        && count($_etat) == 3
        && isset($_etat["mod"]) && preg_match("/^[a-zA-Z0-9_]+$/", $_etat["mod"])
        && isset($_etat["controller"]) && preg_match("/^[a-zA-Z0-9_]+$/", $_etat["controller"])
        && isset($_etat["action"]) && preg_match("/^[a-zA-Z0-9_]+$/", $_etat["action"])
      ){
        return $_etat;
      }
      return false;
    }

    public function etat_is_valid(){
      return $this->valid_etat($this->etat);
    }

    public function action_allowed($etat, $CHECK_FORMAT = true){
      if(!$this->bdd("sgbd")) return false;
      $data = $this->data();
      if($CHECK_FORMAT) $etat = $this->valid_etat($etat);
      if($etat === false){
        $this->erreur("etat invalide");
        return false;
      }
      if(($user_roles = $data->get_user_roles()) === false){
        $this->erreur("Impossible de lire les roles de l'utilisateur courant");
        return false;
      }
      if(!$user_roles){
        $this->erreur("L'utilisateur courant n'a aucun role");
        return false;
      }
      if(
        (
          $action_roles = $data->get_action_roles(
            $etat["mod"],
            $etat["controller"],
            $etat["action"]
          )
        ) === false
      ){
        $this->erreur("Impossible de lire les roles des actions en base");
        return false;
      }
      foreach($user_roles as $id_role){
        $OK = $this->config("default_allow");
        $action = $etat["mod"];
        if(isset($action_roles[$action])){
          $OK =
               (isset($action_roles[$action][0]) && $action_roles[$action][0])
            || (isset($action_roles[$action][$id_role]) && $action_roles[$action][$id_role]);
        }
        $action = $etat["mod"]."/".$etat["controller"];
        if(isset($action_roles[$action])){
          $OK =
               (isset($action_roles[$action][0]) && $action_roles[$action][0])
            || (isset($action_roles[$action][$id_role]) && $action_roles[$action][$id_role]);
        }
        $action = $etat["mod"]."/".$etat["controller"]."/".$etat["action"];
        if(isset($action_roles[$action])){
          $OK =
               (isset($action_roles[$action][0]) && $action_roles[$action][0])
            || (isset($action_roles[$action][$id_role]) && $action_roles[$action][$id_role]);
        }
        if($OK) break;
      }
      return $OK;
    }

    public function run($etat, $params = array(), $valid_role = true){
      if($this->set_etat($etat, $valid_role)){
        if($controller = $this->get_controller($this->etat("mod")."/".$this->etat("controller"))){
          $action_method = $this->etat("action");
          if(method_exists($controller, $action_method)){
            foreach($params as $params_method => $values){
              foreach($values as $key => $value){
                switch(strtolower($params_method)){
                  case "get":
                    $_GET[$this->param($key)] = $value;
                    break;
                  case "post":
                    $_POST[$key] = $value;
                    break;
                }
              }
            }
            if(($controller_validate = $controller->validate()) === true){
              if(($controller_prepare_inputs = $controller->prepare_inputs()) === true){
                $etat_before = $this->etat;
                $this->call_observers("before_action");
                $controller->$action_method($this);
                $etat_after = $this->etat;
                $this->etat = $etat_before;
                $this->call_observers("after_action");
                $this->etat = $etat_after;
              }
              else $this->erreur($controller_prepare_inputs);
            }
            else $this->erreur($controller_validate);
          }
          else $this->erreur("Impossible de trouver l'action ".$this->etat("action"));
        }
        else $this->erreur("Impossible d'instancier le controleur ".$this->etat("controller"));
      }
    }

    public function is_running($etat){
      $_etat = array();
      if(is_array($etat)){
        if(isset($etat["mod"])){
          $_etat["mod"] = $etat["mod"];
          if(isset($etat["controller"])){
            $_etat["controller"] = $etat["controller"];
            if(isset($etat["action"])) $_etat["action"] = $etat["action"];
          }
        }
      }
      else{
        $etat = explode("/", $etat);
        foreach($etat as $etat_item){
          if($etat_item){
            if(!isset($_etat["mod"])) $_etat["mod"] = $etat_item;
            else{
              if(!isset($_etat["controller"])) $_etat["controller"] = $etat_item;
              else{
                if(!isset($_etat["action"])) $_etat["action"] = $etat_item;
                break;
              }
            }
          }
        }
      }
      $IS_RUNNING = true;
      if($IS_RUNNING && isset($_etat["mod"])) $IS_RUNNING = ($_etat["mod"] == $this->etat("mod"));
      if($IS_RUNNING && isset($_etat["controller"])) $IS_RUNNING = ($_etat["controller"] == $this->etat("controller"));
      if($IS_RUNNING && isset($_etat["action"])) $IS_RUNNING = ($_etat["action"] == $this->etat("action"));
      return $IS_RUNNING;
    }

    public function etat($name = null){
      if(!isset($name)) return $this->etat;
      return $this->etat[$name];
    }

    public function get_controller($controller_path){
      if($etat = $this->valid_etat($controller_path)){
        if(!isset($this->controllers)) $this->controllers = array();
        if(!isset($this->controllers[$etat["mod"]])) $this->controllers[$etat["mod"]] = array();
        if(!isset($this->controllers[$etat["mod"]][$etat["controller"]])){
          $controller_class = "mw_".$etat["mod"]."_".$etat["controller"];
          if(!class_exists($controller_class)){
            $controller_file = "controllers/".$etat["mod"]."/".$etat["controller"].".php";
            if($this->app_file_exists($controller_file, "DESC")){
              require_once $this->app_file($controller_file, "DESC");
            }
            if(!class_exists($controller_class)) return false;
          }
          $this->controllers[$etat["mod"]][$etat["controller"]] = new $controller_class();
          $this->controllers[$etat["mod"]][$etat["controller"]]->set_env($this);
        }
        return $this->controllers[$etat["mod"]][$etat["controller"]];
      }
      return false;
    }

  }

  // -------------------------------------------------------------------------------------------
  //                                                                         class mw_controller
  //

  abstract class mw_controller{

    public $env;

    public function set_env(&$env){
      $this->env = &$env;
    }

    public function env(){
      return $this->env;
    }

    public function validate(){
      return true;
    }

    public function prepare_inputs(){
      return true;
    }

  }