<?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{

        private $player_id;
        private $id;
        private $type;
        private $elemental = false;
        private $archetypal = false;
        private $element;
        private $archetype;
        private $level;
        private $quality;
        private $original_quality;
        private $quality_name;
        private $original_quality_name;
        private $value;
        private $efficiency;
        private $max_efficiency;
        private $flag_stats = false;
        private $stat;
        private $effects = [];
        private $flag_unit = false;
        private $unit_id;
        private $unit;

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

            $statement = get_context()->get_db()->prepare("
              SELECT
                player,
                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->player_id = $r["player"];
                $this->id = $r["id"];
                $this->type = $r["type"];
                if ($r["type"] == ARTIFACT_TYPE::ARCHETYPE){
                    $this->archetypal = true;
                }
                elseif ($r["type"] == ARTIFACT_TYPE::ELEMENT){
                    $this->elemental = true;
                }
                $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 = $this->set_quality_name($this->quality);
                $this->original_quality_name = $this->set_quality_name($this->original_quality);

                // TODO: Get unit ID
                // TODO: Move efficiencies to a separate method, but the profile API must read it so it's saved.
                // 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 = get_context()->get_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);
                    $statement->execute();
                }
            }
        }

        /**
         * Gets the quality name from the mappings.
         *
         * @param int $q Quality id.
         * @return string Quality (Uppercase)
         */
        private function set_quality_name($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(){
            $eff = [0.0, 0.0, 0.0, 0.0];

            $query = "
              SELECT
                min,
                max
              FROM
                artifact_roll_type,
                artifact_effect_roll
              WHERE
                artifact_roll_type.id = artifact_effect_roll.type AND
                artifact_roll_type.initial = :initial AND
                artifact_roll_type.upgrade = :upgrade AND
                artifact_effect_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;
                    $statement = get_context()->get_db()->prepare($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;
        }
        
        private function load_unit(){
            $statement = get_context()->get_db()->prepare("
              SELECT unit
              FROM unit_artifact
              WHERE
                artifact = :artifact AND
                rta = :rta;
            ");
            $statement->bindValue(':artifact', $this->id, SQLITE3_TEXT);
            $statement->bindValue(':rta', get_context()->get_game_mode(), SQLITE3_TEXT);
            $q = $statement->execute();
            $r = $q->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->unit_id = $r["unit"];
                $this->unit = new Unit($r["unit"]);
            }
            $this->flag_unit = true;
        }
        
        private function load_stats(){
            $this->stat = new Artifact_Stat($this->id);

            // Get effects
            $statement = get_context()->get_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"]));
            }
            $this->flag_stats = true;
        }

        /**
         * 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;
        }
        
        /**
         * Retrieves the owner's player identifier.
         *
         * @return int Player ID.
         */
        public function get_player_id(){
            return $this->player_id;
        }
        
        /**
         * Retrieves the artifact identifier.
         *
         * @return string Artifact ID.
         */
        public function get_id(){
            return $this->id;
        }
        
        /**
         * Checks if the artifact is elemental or archetiplal.
         *
         * @return int ARTIFACT_TYPE_ID::ELEMENT or ARTIFACT_TYPE:ARCHETYPE.
         */
        public function get_type(){
            return $this->type;
        }
        
        /**
         * Cheks if the artifact is an elemental one.
         *
         * @return boolean True for elemental artifacts, false for archetipal ones.
         */
        public function is_elemental(){
            return $this->elemental;
        }
        
        /**
         * Cheks if the artifact is an archetipal one.
         *
         * @return boolean True for archetipal artifacts, false for elemental ones.
         */
        public function is_archetypal(){
            return $this->archetypal;
        }
        
        /**
         * Retrieves the element of an elemental artifact.
         *
         * @see ELEMENT_ID
         *
         * @return int Element ID, null for archetipal artifacts.
         */
        public function get_element(){
            return $this->element;
        }
        
        /**
         * Retrieves the archetype of an archetipal artifact.
         *
         * @see ARCHETYPE_ID
         *
         * @return int Archetype ID, null for elemental artifacts.
         */
        public function get_archetype(){
            return $this->archetype;
        }
        
        /**
         * Retrieves the artifact level.
         *
         * @return int Artifact level (0-15).
         */
        public function get_level(){
            return $this->level;
        }
        
        /**
         * Retrieves the quality of the artifact.
         *
         * @see QUALITY_ID
         *
         * @return int Quality of the artifact.
         */
        public function get_quality(){
            return $this->quality;
        }
        
        /**
         * Retrieves the original quality of the artifact.
         *
         * @see QUALITY_ID
         *
         * @return int Original quality of the artifact.
         */
        public function get_original_quality(){
            return $this->original_quality;
        }
        
        /**
         * Retrieves the quality name.
         *
         * @return string Quality name, uppercase.
         */
        public function get_quality_name(){
            return $this->quality_name;
        }
        
        /**
         * Retrieves the original quality name.
         *
         * @return string Original quality name, uppercase.
         */
        public function get_original_quality_name(){
            return $this->original_quality_name;
        }
        
        /**
         * Retrieves the value of the artifact.
         *
         * @return int artifact value.
         */
        public function get_value(){
            return $this->value;
        }
        
        /**
         * Retrieves the efficiency of the artifact.
         *
         * @return float Artifact efficiency (0-100).
         */
        public function get_efficiency(){
            return $this->efficiency;
        }
        
        /**
         * Retrieves the maximum efficiency of the artifact.
         *
         * @return float Artifact maximum efficiency (0-100).
         */
        public function get_max_efficiency(){
            return $this->max_efficiency;
        }
        
        /**
         * Retrieves the artifact's main stat.
         *
         * @return Artifact_Stat Artifact main stat.
         */
        public function get_stat(){
            if (!$this->flag_stats){
                $this->load_stats();
            }
            return $this->stat;
        }
        
        /**
         * Retrieves a list of the artifact's effects.
         *
         * @return Artifact_Effect[] List of effects.
         */
        public function get_effects(){
            if (!$this->flag_stats){
                $this->load_stats();
            }
            return $this->effects;
        }
        
        /**
         * Retrieves the identifier of the unit who has eqquiped the artifact.
         *
         * @return string Unit ID.
         */
        public function get_unit_id(){
            if (!$this->flag_unit){
                $this->load_unit();
            }
            return $this->unit_id;
        }

        /**
         * Retrieves the unit who has eqquiped the artifact.
         *
         * @return Unit Unit who has equipped the artifact.
         */
        public function get_unit(){
            if (!$this->flag_unit){
                $this->load_unit();
            }
            return $this->unit;
        }

    }
?>