<?php
/**
 * Artifact 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");
require_once(PATH::ENTITY . "Artifact_Stat.php");
require_once(PATH::ENTITY . "Artifact_Effect.php");

/**
 * Artifact.
 *
 * Represents a game artifact.
 *
 * @category Entity
 */
class Artifact extends Entity{

    /**
     * @var int The owner's player ID.
     */
    private $player_id;

    /**
     * @var int The artifact ID.
     */
    private $id;

    /**
     * @var int The artifact type ({@see ARTIFACT_TYPE}).
     */
    private $type;

    /**
     * @var bool Indicates if is an elemental artifact.
     */
    private $elemental = false;

    /**
     * @var bool Indicates it the artifact is archetypal.
     */
    private $archetypal = false;

    /**
     * @var int Artifact element ID, null for archetypals ({@see ELEMENT_ID}).
     */
    private $element;

    /**
     * @var int Artifact archetype ID, null for elementals ({@see ARCHETYPE_ID}). 
     */
    private $archetype;

    /**
     * @var int Artifact level. 
     */
    private $level;

    /**
     * @var int Artifact quality ({@see QUALITY_ID}).
     */
    private $quality;

    /**
     * @var int Artifact original quality ({@see QUALITY_ID}).
     */
    private $original_quality;

    /**
     * @var string Artifact quality name.
     */
    private $quality_name;

    /**
     * @var string Artifact original quality name.
     */
    private $original_quality_name;

    /**
     * @var string Artifact value in mana stones.
     */
    private $value;

    /**
     * @var float Artifact efficiency.
     */
    private $efficiency;

    /**
     * @var float Artifact maximum efficiency.
     */
    private $max_efficiency;

    /**
     * @var bool Internal flag to check if the stat and effects have been loaded into the entity.
     */
    private $flag_stats = false;

    /**
     * @var Artifact_Stat The artifact main stat.
     */
    private $stat;

    /**
     * @var Artifact_Effect[] Every effect the artifact currently has.
     */
    private $effects = [];

    /**
     * @var bool Internal flag to check if the unit that equips the artifact (if any) has been
     * loaded.
     */
    private $flag_unit = false;

    /**
     * @var Unit Unit that equips the artifact in the curent game mode.
     */
    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);

            // 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();
                $statement = get_context()->get_db()->prepare("
                  UPDATE run_drop_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();
            }
        }
        else{
            $statement = get_context()->get_db()->prepare("
              SELECT
                id,
                type,
                attribute,
                archetype,
                quality,
                value,
                efficiency,
                max_efficiency,
                effect_1,
                effect_2,
                effect_3,
                effect_4
              FROM run_drop_artifact
              WHERE id = :id;
            ");
            $statement->bindValue(':id', $id, SQLITE3_TEXT);
            $r = $statement->execute()->fetchArray(SQLITE3_ASSOC);
            if ($r){
                $this->id = $r["id"];
                $this->type = $r["type"];
                if ($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 = 0;
                $this->quality = $r["quality"];
                $this->original_quality = $r["quality"];
                $this->value = $r["value"];
                $this->efficiency = $r["efficiency"];
                $this->max_efficiency = $r["max_efficiency"];
                $this->locked = false;
                $this->quality_name = $this->set_quality_name($this->quality);
                $this->original_quality_name = $this->set_quality_name($this->original_quality);
                
                $this->stat = new Artifact_Stat($this->id);
                if (is_int($r["effect_1"])){
                    array_push($this->effects, new Artifact_Effect($this->id, ARTIFACT_EFFECT_SLOT_ID::EFFECT_1));
                }
                if (is_int($r["effect_2"])){
                    array_push($this->effects, new Artifact_Effect($this->id, ARTIFACT_EFFECT_SLOT_ID::EFFECT_2));
                }
                if (is_int($r["effect_3"])){
                    array_push($this->effects, new Artifact_Effect($this->id, ARTIFACT_EFFECT_SLOT_ID::EFFECT_3));
                }
                if (is_int($r["effect_4"])){
                    array_push($this->effects, new Artifact_Effect($this->id, ARTIFACT_EFFECT_SLOT_ID::EFFECT_4));
                }
                $this->flag_stats = true;
                
                // 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 run_drop_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 $q Quality id.
     * @return string Quality name (uppercase)
     */
    private function set_quality_name($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(){
        if (! $this->flag_stats){
            $this->load_stats();
        }
        $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]->get_value() > 0){
                $value = $this->effects[$i]->get_value();
                $value = $this->effects[$i]->get_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]->get_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;
    }

    /**
     * Loads the unit that equips the artifact into the entity (if any).
     * 
     * Must be called only once before trying to get the unit. Sets the flag
     * {@link Artifact:$flag_unit} to true.
     */
    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;
    }

    /**
     * Loads the artifact main stat and effects into the entity.
     *
     * Must be called only once before trying to get the stat or effects. Sets the flag
     * {@link Artifact:$flag_stats} to true.
     */
    private function load_stats(){
        $this->stat = new Artifact_Stat($this->id);
        $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){
            $max_efficiency += (100/8);
        }
        if ($this->level < 9){
            $max_efficiency += (100/8);
        }
        if ($this->level < 6){
            $max_efficiency += (100/8);
        }
        if ($this->level < 3){
            $max_efficiency += (100/8);
        }
        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 bool True for elemental artifacts, false for archetipal ones.
     */
    public function is_elemental(){
        return $this->elemental;
    }

    /**
     * Cheks if the artifact is an archetipal one.
     *
     * @return bool 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;
    }

}