<?php
/**
 * Leader skill entity file.
 *
 * Creates the entity and makes it available.
 *
 * @author Iñigo Valentin <i@inigovalentin.com>
 * @license https://www.gnu.org/licenses/gpl-3.0.en.html GNU General Public License V3
 * @package SWDB
 */

require_once(PATH::ENTITY . "Entity.php");

/**
 * Monster leader skill.
 *
 * Represents a leader skill
 *
 * @category Entity
 */
class Leader_Skill extends Entity{

    /**
     * @var int Leader skill identifier.
     */
    private $id;

    /**
     * @var int ID of the stat augmented by the leader skill.
     */
    private $stat;

    /**
     * @var int Amount the stat is increased by.
     */
    private $amount;

    /**
     * @var int Effect area id (if any).
     */
    private $area;

    /**
     * @var int Affected element id (if any).
     */
    private $element;

    /**
     * @var string Human readable description of the skill.
     */
    private $description;

    /**
     * Constructor.
     *
     * Searches the database and retrieves the information about the
     * skill, populating it and it's items.
     *
     * @param int $id Skill identifier.
     */
    public function __construct($id){

        $statement = get_context()->get_db()->prepare("
              SELECT
                id,
                stat,
                amount,
                area,
                element
              FROM leader_skill
              WHERE id = :id;
            ");
        $statement->bindValue(':id', $id, SQLITE3_TEXT);
        $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
        if ($r){
            $this->id = $r["id"];
            $this->stat = $r["stat"];
            $this->amount = $r["amount"];
            $this->area = $r["area"];
            $this->element = $r["element"];
            $this->description = $this->create_description();
        }
    }

    /**
     * Retrieves the leader skill identifier.
     *
     * @return string Leader skill ID.
     */
    public function get_id(){
        return $this->id;
    }

    /**
     * Retrieves $stat
     *
         * @return int
     */
    public function get_stat(){
        return $this->stat;
    }

    /**
     * Retrieves $amount
     *
         * @return int
     */
    public function get_amount(){
        return $this->amount;
    }

    /**
     * Retrieves $area
     *
         * @return int
     */
    public function get_area(){
        return $this->area;
    }

    /**
     * Retrieves $element
     *
         * @return int
     */
    public function get_element(){
        return $this->element;
    }

    /**
     * Retrieves the skill description.
     *
     * @return string Skill description.
     */
    public function get_description(){
        return $this->description;
    }

    /**
     * Gets the path to the skill image. 
     * @return string Image URL, or a fixed unknown image.
     */
    public function get_image(){
        return APPLICATION::img("SKILL_LEADER", $this->id);
    }

    /**
     * Composes a human readable description of the skill.
     *
     * @return string The description.
     */
    private function create_description(){
        $s = "Increases the ";
        switch ($this->stat){
            case STAT_ID::ATK:
                $s .= "attack power";
                break;
            case STAT_ID::DEF:
                $s .= "defense";
                break;
            case STAT_ID::HP:
                $s .= "HP";
                break;
            case STAT_ID::SPD:
                $s .= "attack speed";
                break;
            case STAT_ID::CRR:
                $s .= "critical rate";
                break;
            case STAT_ID::CRD:
                $s .= "critical damage";
                break;
            case STAT_ID::ACC:
                $s .= "accuracy";
                break;
            case STAT_ID::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_ID::DUNGEON:
                $s = $s . " in the Dungeons";
                break;
            case EFFECT_AREA_ID::ARENA:
                $s = $s . " in the Arena";
                break;
            case EFFECT_AREA_ID::GUILD:
                $s = $s . " in Guild content";
                break;
        }
        $s = str_replace("  ", " ", $s) . ".";
        return $s;
    }

}