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

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

    /**
     * Owned artifact.
     *
     * Represents an object from the table 'artifact'.
     *
     * @category Entity
     */
    class Artifact extends Entity{

        /**
         * @var int Owner identifier.
         */
        public $uid;

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

        /**
         * @var int Artifact type (null if element artifact).
         *
         * @see ARTIFACT_TYPE
         */
        public $type;

        /**
         * @var int Artifact element (null if type artifact).
         *
         * @see ELEMENT_ID
         */
        public $element;

        /**
         * @var int Artifact archetype (null if elemental artifact).
         *
         * @see ARCHETYPE_ID
         */
        public $archetype;

        /**
         * @var int Level of the rune.
         */
        public $level;

        /**
         * @var int Artifact quality.
         *
         * @see QUALITY_ID
         */
        public $quality;

        /**
         * @var int Artifact original quality.
         *
         * @see QUALITY_ID
         */
        public $original_quality;

        /**
         * @var string Artifact quality name (uppercase).
         */
        public $quality_name;

        /**
         * @var string Artifact original quality name (uppercase).
         */
        public $original_quality_name;

        /**
         * @var int Price of the artifact.
         */
        public $value;

        /**
         * @var float Current efficiency of the artifact.
         */
        public $efficiency;

        /**
         * @var float Maximum potential efficiency of the artifact.
         */
        public $max_efficiency;

        /**
         * @var Artifact_Stat Main stat of the artifact.
         *
         * @see STAT_ID
         */
        public $stat;

        /**
         * @var \Artifact_Effect Effects of the artifact.
         */
        public $effects = [];

        /**
         * @var Unit Unit the artifact is assigned to.
         */
        public $unit;

        /**
         * Constructor.
         *
         * Searches the database and retrieves the information about the
         * artifact, populating it and it's items.
         *
         * @param int $id Artifact id.
         * @global resource Database connection.
         */
        public function __construct($id){

            global $db;

            $statement = $db->prepare("
              SELECT
                id,
                type,
                attribute,
                archetype,
                level,
                quality,
                original_quality,
                value,
                efficiency,
                max_efficiency,
                locked
              FROM artifact
              WHERE id = :id;
            ");
            $statement->bindValue(':id', $id, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->id = $r["id"];
                $this->type = $r["type"];
                $this->element = $r["attribute"];
                $this->archetype = $r["archetype"];
                $this->level = $r["level"];
                $this->quality = $r["quality"];
                $this->original_quality = $r["original_quality"];
                $this->value = $r["value"];
                $this->efficiency = $r["efficiency"];
                $this->max_efficiency = $r["max_efficiency"];
                $this->locked = $r["locked"];
                $this->quality_name = $this->get_quality_name($this->quality);
                $this->original_quality_name = $this->get_quality_name($this->original_quality);

                // Get stat
                $this->stat = new Artifact_Stat($this->id);

                // Get effects
                $statement = $db->prepare("
                  SELECT slot
                  FROM artifact_effect
                  WHERE artifact = :artifact
                  ORDER BY slot;
                ");
                $statement->bindValue(':artifact', $this->id, SQLITE3_TEXT);
                $q = $statement->execute();
                while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                    array_push($this->effects, new Artifact_Effect($this->id, $r["slot"]));
                }

                // Get efficiencies, or calculate them if not yet set.
                if ($this->efficiency == null || $this->efficiency == "" || intval($this->efficiency) == 0){
                    $this->efficiency = $this->calculate_efficiency();
                    $this->max_efficiency = $this->calculate_maximum_efficiency();
                    $statement = $db->prepare("
                      UPDATE artifact
                      SET
                        efficiency = :efficiency,
                        max_efficiency = :max_efficiency
                      WHERE id = :artifact
                    ");
                    $statement->bindValue(':efficiency', $this->efficiency, SQLITE3_FLOAT);
                    $statement->bindValue(':max_efficiency', $this->max_efficiency, SQLITE3_FLOAT);
                    $statement->bindValue(':artifact', $this->id, SQLITE3_INTEGER);
                    $q = $statement->execute();
                }
            }
        }

        /**
         * Gets the quality name from the mappings.
         *
         * @param int $q Quality id.
         * @return string Quality (Uppercase)
         */
        private function get_quality_name($q){
            switch ($q){
                case QUALITY_ID::NORMAL:
                    return "NORMAL";
                case QUALITY_ID::MAGIC:
                    return "MAGIC";
                case QUALITY_ID::RARE:
                    return "RARE";
                case QUALITY_ID::HERO:
                    return "HERO";
                case QUALITY_ID::LEGEND:
                    return "LEGEND";
                default:
                    return "";
            }
        }

        /**
         * Calcuates the efficiency of the artifact.
         *
         * @return float Efficiency
         */
        private function calculate_efficiency(){
            global $db;
            $eff = [0.0, 0.0, 0.0, 0.0];

            $query = "
              SELECT
                min,
                max
              FROM
                k_artifact_roll_type,
                k_artifact_stat_roll
              WHERE
                k_artifact_roll_type.id = k_artifact_stat_roll.type AND
                k_artifact_roll_type.initial = :initial AND
                k_artifact_roll_type.upgrade = :upgrade AND
                k_artifact_stat_roll.effect = :effect
              ";

            for ($i = 0; $i <= 3; $i ++){
                if (sizeof($this->effects) > $i && $this->effects[$i] != null && $this->effects[$i]->value > 0){
                    $value = $this->effects[$i]->value;
                    $value = $this->effects[$i]->value;
                    $statement = $db->prepare($query);
                    $statement->bindValue(':initial', 1, SQLITE3_TEXT);
                    $statement->bindValue(':upgrade', 1, SQLITE3_TEXT);
                    $statement->bindValue(':effect', $this->effects[$i]->effect, SQLITE3_TEXT);
                    $r_roll = $statement->execute()->fetchArray(SQLITE3_ASSOC);
                    if ($r_roll ){
                        $min_initial = 0;//$r_initial["min"];
                        $max_initial = $r_roll["max"];
                        $min_upgrade = 0;//$r_upgrade["min"];
                        $max_upgrade = $r_roll["max"];
                        $eff[$i] = ((5 * $value) - ( 4 * $min_upgrade + $min_initial)) / ( 8 * ($max_initial - $min_initial + (4 * ($max_upgrade + $min_upgrade))));
                    }
                }
            }
            $efficiency = 0.0;
            for ($i = 0; $i <= 3; $i ++){
                $efficiency += $eff[$i];
            }
            $efficiency *= 100;
            return $efficiency;
        }

        /**
         * Calcuates the maximum efficiency of the artifact.
         *
         * @return float Efficiency
         */
        private function calculate_maximum_efficiency(){
            $max_efficiency = $this->efficiency;
            if ($this->level < 12){
                $max_efficiency += (1/8);
            }
            if ($this->level < 9){
                $max_efficiency += (1/8);
            }
            if ($this->level < 6){
                $max_efficiency += (1/8);
            }
            if ($this->level < 3){
                $max_efficiency += (1/8);
            }
            return $max_efficiency;
        }

    }
?>