 <?php

/**
 * Enchantment list page file.
 *
 * Provides a class with all the properties and methods to display the page.
 *
 * @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::PAGE . "Page.php");
require_once(PATH::ENTITY . "Enchantment.php");

/**
 * Enchantment list page model.
 *
 * @category Page
 */
class Enchantments_Page extends Page{

    /**
     * @var Enchantment[] Selected enchantment gems.
     */
    private $gems = [];

    /**
     * @var Enchantment[] Selected enchantment grindstones.
     */
    private $grindstones = [];

    /**
     * @var Enchantment[] Selected enchantments.
     */
    private $enchantments = [];

    /**
     * 
     * @var mixed[] Page filters.
     */
    private $filters = [
        "TYPE" => [],
        "RUNE" => [],
        "STAT" => [],
        "MIN_QUALITY" => QUALITY_ID::NORMAL,
        "MAX_QUALITY" => QUALITY_ID::LEGEND,
    ];

    /**
     * Constructor.
     *
     * Retrieves the data and initializes the variables.
     */
    public function __construct(){
        parent::__construct();
        $this->set_public(true);
        $this->set_view("enchantments.php");
        $this->set_title("Enchantments");
        $this->set_description(get_context()->get_player()->get_name() . "'s enchantments");
        $this->set_canonical("player/" . get_context()->get_player()->get_id() . "/enchantments/");
        $this->add_css("enchantments.css");

        $this->parse_filters();
        $result_set = $this->prepare_statement()->execute();
        while ($result = $result_set->fetchArray(SQLITE3_ASSOC)){
            $enchantment = new Enchantment($result["id"]);
            array_push($this->enchantments, $enchantment);
            if ($enchantment->is_gem()){
               array_push($this->gems, $enchantment);
            }
            else{
                array_push($this->grindstones, $enchantment);
            }
        }
        $this->set_code(200);
        $this->set_message("OK");
    }

    /**
     * Parses the request looking for the selected filters, validates them
     * and adds them to the $filters array.
     */
    private function parse_filters(){
        if (isset($_GET["min_quality"]) && intval($_GET["min_quality"]) >= QUALITY_ID::NORMAL && intval($_GET["min_quality"]) <= QUALITY_ID::LEGEND){
            $this->filters["MIN_QUALITY"] = $_GET["min_quality"];
        }
        if (isset($_GET["max_quality"]) && intval($_GET["max_quality"]) >= QUALITY_ID::NORMAL && intval($_GET["max_quality"]) <= QUALITY_ID::LEGEND){
            $this->filters["MAX_QUALITY"] = $_GET["max_quality"];
        }
        if (isset($_GET["stat"])){
            $stats = $_GET["stat"];
            foreach ($stats as $stat){
                array_push($this->filters["STAT"], intval($stat));
            }
        }
        if (isset($_GET["rune"])){
            $runes = $_GET["rune"];
            foreach ($runes as $rune){
                array_push($this->filters["RUNE"], intval($rune));
            }
        }
        if (isset($_GET["type"])){
            $types = $_GET["type"];
            foreach ($types as $type){
                array_push($this->filters["TYPE"], $type);
            }
        }
    }

    /**
     * Prepares the statement to execute against the database using the filter values.
     *
     * @return SQLite3Stmt prepared statement.
     */
    private function prepare_statement(){
        // Common items
        $query = "
          SELECT id
          FROM enchantment
          WHERE
            player = :player AND
            quality BETWEEN :min_quality AND :max_quality
        ";
        
        // Some main stat selected.
        if (count($this->filters["STAT"]) > 0){
            $query .= " AND stat IN (";
            for ($i = 0; $i < sizeof($this->filters["STAT"]); $i ++){
                $query .= ":stat_$i, ";
            }
            $query = rtrim($query, ", ") . ") ";
        }
        
        // Some sets selected.
        if (count($this->filters["RUNE"]) > 0){
            $query .= " AND (rune IN (";
            for ($i = 0; $i < sizeof($this->filters["RUNE"]); $i ++){
                $query .= ":rune_$i, ";
            }
            $query = rtrim($query, ", ");
            $query .= ") OR type IN (:inmemorial_grindstone, :inmemorial_gem))"; // Inmemorials
        }
        
        // Only one type selected.
        if (count($this->filters["TYPE"]) == 1){
            // Only one selectd, it's either gems or grindstones
            if (in_array("GEM", $this->filters["TYPE"])){
                $query .= " AND type IN (:type_gem, :type_inmemorial_gem) "; // Gems.
            }
            else{
                $query .= " AND type IN (:type_grindstone, :type_inmemorial_grindstone) "; // Grinds.
            }
        }
        $query .= "
          ORDER BY
            type = :type_inmemorial_grindstone DESC,  -- Inmemorial Grindstone
            type = :type_inmemorial_gem DESC,  -- Inmemorial Gem
            rune,
            type,
            quality DESC,
            stat
        ";
        $statement = get_context()->get_db()->prepare($query);
        $statement->bindValue(":player", get_context()->get_player()->get_id(), SQLITE3_TEXT);
        $statement->bindValue(":min_quality", $this->filters["MIN_QUALITY"], SQLITE3_INTEGER);
        $statement->bindValue(":max_quality", $this->filters["MAX_QUALITY"], SQLITE3_INTEGER);
        for ($i = 0; $i < sizeof($this->filters["STAT"]); $i ++){
            $statement->bindValue(":stat_$i", $this->filters["STAT"][$i], SQLITE3_INTEGER);
        }
        for ($i = 0; $i < sizeof($this->filters["RUNE"]); $i ++){
            $statement->bindValue(":rune_$i", $this->filters["RUNE"][$i], SQLITE3_INTEGER);
        }
        $statement->bindValue(":inmemorial_gem", ENCHANTMENT_TYPE_ID::INMEMORIAL_GEM, SQLITE3_INTEGER);
        $statement->bindValue(":inmemorial_grindstone", ENCHANTMENT_TYPE_ID::INMEMORIAL_GRINDSTONE, SQLITE3_INTEGER);
        $statement->bindValue(":type_gem", ENCHANTMENT_TYPE_ID::GEM, SQLITE3_INTEGER);
        $statement->bindValue(":type_grindstone", ENCHANTMENT_TYPE_ID::GRINDSTONE, SQLITE3_INTEGER);
        $statement->bindValue(":type_inmemorial_gem", ENCHANTMENT_TYPE_ID::INMEMORIAL_GEM, SQLITE3_INTEGER);
        $statement->bindValue(":type_inmemorial_grindstone", ENCHANTMENT_TYPE_ID::INMEMORIAL_GRINDSTONE, SQLITE3_INTEGER);
        return $statement;
    }

    /**
     * Retrieves the gems to show.
     *
     * @return Enchantment[] Selected gems. 
     */
    public function get_gems(){
        return $this->gems;
    }

    /**
     * Retrieves the grindstones to show.
     *
     * @return Enchantment[] Selected grindstones. 
     */
    public function get_grindstones(){
        return $this->grindstones;
    }
    
    /**
     * Retrieves the enchantments to show, both gems and grindstones.
     *
     * @return Enchantment[] Selected enchantments.
     */
    public function get_enchantments(){
        return $this->enchantments;
    }

    /**
     * Retrieves the page filters.
     *
     * @return mixed[] Page filtes 
     */
    public function get_filters(){
        return $this->filters;
    }

    /**
     * Retrieves one filter.
     * 
     * @param string $key
     * @return mixed Filter value, null if if doesn't exist.
     */
    public function get_filter($key){
        if (array_key_exists($key, $this->filters)){
            return $this->filters[$key];
        }
        else{
            return null;
        }
    }

}