<?php

    require_once($path["handler"] . "Handler.php");
    require_once($path["entity"] . "Monster_Collection.php");


    /**
     * Handles the update of a monster in the collection.
     */
    class Monster_Collection_Handler extends Handler{

        /**
         * Constructor.
         *
         * Handles the database operation.
         *
         * @param SQLite3 $db Connection to the database.
         * @param int $id Monster identifier in the collection. Will be ignored
         *                when inserting.
         * @param string $mode 'insert', 'update' or 'delete'.
         * @param string[] $params Array of parameters with the properties to
         *                         modify. Will ony use 'monster', 'stars',
         *                         'level' and 'awaken'. Will be ignored when
         *                         deleting. All of them are required when
         *                         inserting.
         */
        public function __construct($db, $id, $mode, $params){
            parent::__construct($db, new Monster_Collection($db, $id));
            if (strtoupper($mode{0}) == "I"){
                $this->insert($params);
            }
            elseif(strtoupper($mode{0}) == "D"){
                $this->delete();
            }
            elseif(strtoupper($mode{0}) == "U"){
                $this->update($params);
            }
            else{
                error_log("Monster_Collection_Handler::__construct : Unknown mode " + $mode);
                $this->response = 400;
            }
        }

        private function insert($params){
            $s =
              "INSERT INTO monster_collection (monster, stars, level, awaken) VALUES( " .
                 $params["monster"] . ", " .
                 $params["stars"] . ", " .
                 $params["level"] . ", " .
                 $params["awaken"] . " " .
              "); ";
            if ($this->db->exec($s)){
                $this->response = 200;
            }
            else{
                error_log("Monster_Collection_Handler::insert : Query error for --" + $s + "-- " + mysqli_error($this->db));
                $this->response = 400;
            }
        }

        private function delete(){
            $s =
              "UPDATE monster_collection SET " .
              "  stars = 0, " .
              "  level = 0, " .
              "  awaken = 0 " .
              "WHERE id = " . $this->entity->id . "; ";
            if ($this->db->exec($s)){
                $this->response = 200;
            }
            else{
                error_log("Monster_Collection_Handler::delete : Query error for --" + $s + "-- " + mysqli_error($this->db));
                $this->response = 400;
            }
        }

        private function update($params){
            if (isset($params["monster"])){
                $this->entity->monster = new Monster($params["monster"]);
            }
            if (isset($params["stars"])){
                $this->entity->stars = $params["stars"];
            }
            if (isset($params["level"])){
                $this->entity->level = $params["level"];
            }
            if (isset($params["awaken"])){
                $this->entity->awaken = $params["awaken"];
            }
            $s =
              "UPDATE monster_collection SET " .
              "  monster = " . $this->monster->id . ", " .
              "  stars = " . $this->stars . ", " .
              "  level = " . $this->level . ", " .
              "  awaken = " . $this->awaken . " " .
              "WHERE id = " . $this->entity->id . "; ";
            if ($this->db->exec($s)){
                $this->response = 200;
            }
            else{
                error_log("Monster_Collection_Handler::update : Query error for --" + $s + "-- " + mysqli_error($this->db));
                $this->response = 400;
            }
        }
    }
?>