<?php
    /**
     * Leader skill entity file.
     *
     * Creates the entity and makes it available.
     *
     * @category Entity
     */

    /**
     * Require dependent entities if not present.
     */
    require_once(PATH::ENTITY . "Entity.php");

    /**
     * Monster skill.
     *
     * Represents an object from the table 'k_skill'.
     *
     * @category Entity
     */
    class K_Leader_Skill extends Entity{

        /**
         * @var int Skill identifier.
         */
        public $id;

        /**
         * @var int Skill attribute ID.
         */
        public $attribute;

        /**
         * @var int Attribute increase amount.
         */
        public $amount;

        /**
         * @var int Effect area id.
         */
        public $area;

        /**
         * @var int Affected element id.
         */
        public $element;

        /**
         * Constructor.
         *
         * Searches the database and retrieves the information about the
         * skill, populating it and it's items.
         *
         * @param resource $db Connection to the database.
         * @param int $id Skill identifier.
         */
        public function __construct($db, $id){
            parent::__construct($db);
            $s =
              "SELECT " .
              "  id, " .
              "  stat, " .
              "  amount, " .
              "  area, " .
              "  element " .
              "FROM k_leader_skill " .
              "WHERE id = $id; ";
            $q = $this->db->query($s);
            $r = $q->fetchArray(SQLITE3_ASSOC);
            $this->id = $r["id"];
            $this->attribute = $r["stat"];
            $this->amount = $r["amount"];
            $this->area = $r["area"];
            $this->element = $r["element"]; 
        }

        /**
         * Gets the path to the skill image. The image must be in the
         * img/skill_leader/ directory, and its name must be the skill id,
         * padded with '0' to 4 digites, and the extension must be '.png'.
         *
         * @return string Image URL, or a fixed unknown image.
         */
        public function get_image(){
            if (file_exists(PATH::BASE . "img/content/skill_leader/" . str_pad($this->id, 4, '0', STR_PAD_LEFT) . ".png")){
                return URL::IMG["SKILL_LEADER"] . str_pad($this->id, 4, '0', STR_PAD_LEFT) . ".png";
            }
            else{
                return URL::IMG["UNKNOWN"];
            }
        }

        /**
         * Composes a human readable description of the skill.
         *
         * @return string The description.
         */
        public function create_description(){
            global $STAT;
            global $ELEMENT;
            global $EFFECT_AREA;
            $s = "Increases the ";
            switch ($this->attribute){
                case STAT::ATK:
                    $s .= "attack power";
                    break;
                case STAT::DEF:
                    $s .= "defense";
                    break;
                case STAT::HP:
                    $s .= "HP";
                    break;
                case STAT::SPD:
                    $s .= "attack speed";
                    break;
                case STAT::CRIT_RATE:
                    $s .= "critical rate";
                    break;
                case STAT::CRIT_DMG:
                    $s .= "critical damage";
                    break;
                case STAT::ACC:
                    $s .= "accuracy";
                    break;
                case STAT::RES:
                    $s .= "resistance";
                    break;
            }
            $s .= " of ally monsters ";
            switch ($this->element){
                case ELEMENT_ID::WATER:
                    $s .= " with Water attribute ";
                    break;
                case ELEMENT_ID::FIRE:
                    $s .= " with Fire attribute ";
                    break;
                case ELEMENT_ID::WIND:
                    $s .= " with Wind attribute ";
                    break;
                case ELEMENT_ID::LIGHT:
                    $s .= " with Light attribute ";
                    break;
                case ELEMENT_ID::DARK:
                    $s .= " with Dark attribute ";
                    break;
            }
            $s = $s . "by " . $this->amount . "%";
            switch ($this->area){
                case EFFECT_AREA::DUNGEON:
                    $s = $s . " in the Dungeons";
                    break;
                case EFFECT_AREA::ARENA:
                    $s = $s . " in the Arena";
                    break;
                case EFFECT_AREA::GUILD:
                    $s = $s . " in Guild content";
                    break;
            }
            $s = $s . ".";
            return $s;
        }

    }
?>