 <?php
 
    /**
     * Artifact list page file.
     *
     * Provides a class with all the properties and methods to display the page.
     *
     * @category Page
     */

    /**
     * Require dependent files if not present.
     */
    require_once(PATH::PAGE . "Page.php");
    require_once(PATH::ENTITY . "Custom_Filter.php");
    require_once(PATH::ENTITY . "Artifact.php");
    require_once(PATH::ENTITY . "Unit.php");

    /**
     * Artifact list page model.
     *
     * @category Page
     */
    class Artifacts_Page extends Page{

        /**
         * @var \Artifact[] Artiffacts to show.
         *
         * In this case, the monster member is not the id, but a monster
         * instance.
         */
        public $artifacts = [];

        /**
         * @var \Filter[] Custom filters for this page.
         */
        public $custom_filters = [];

        /**
         * Constructor.
         *
         * Retrieves the data and initializes the variables.
         *
         * @global int Player ID.
         * @global resource Database connection.
         */
        public function __construct(){
            global $UID;
            global $db;
            $this->view = PATH::VIEW . "artifacts.php";
            $this->parse_filters();
            if (!isset($_GET["custom_filter"])){
                $s = $this->build_query();
            }
            else{
                $s = $this->build_custom_query($_GET["custom_filter"]);
            }
            $q = $db->query($s);
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                $artifact = new Artifact($r["id"]);
                if (strlen($artifact->assigned_to) > 0){
                    $artifact->assigned_to = new Unit($artifact->assigned_to, false);
                }
                array_push($this->artifacts, $artifact);
            }
            $s = "
              SELECT id
              FROM filter
              WHERE
                uid = '$UID' AND
                page = 'ARTIFACTS';
            ";
            $q = $db->query($s);
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                array_push($this->custom_filters, new Custom_Filter($r["id"]));
            }
            $this->title = "Artifacts - SWDB";
            $this->description = "Artifact inventory";
            $this->canonical = URL::BASE . "artifacts/";
        }

        /**
         * Parses the request looking for the selected filters, validates them
         * and adds them to the $filters array.
         */
        private function parse_filters(){
            $this->filters = FILTER::ARTIFACT;
            if (isset($_GET["element"])){
                $elements = $_GET["element"];
                foreach ($elements as $element){
                    array_push($this->filters["ELEMENT"], intval($element));
                }
            }
            if (isset($_GET["archetype"])){
                $archetypes = $_GET["archetype"];
                foreach ($archetypes as $archetype){
                    array_push($this->filters["ARCHETYPE"], intval($archetype));
                }
            }
            if (isset($_GET["main_stat"])){
                $mains = $_GET["main_stat"];
                foreach ($mains as $main){
                    array_push($this->filters["MAIN"], intval($main));
                }
            }
            if (isset($_GET["min_level"]) && intval($_GET["min_level"]) >= 0 && intval($_GET["min_level"]) <= 15){
                $this->filters["MIN_LEVEL"] = $_GET["min_level"];
            }
            if (isset($_GET["max_level"]) && intval($_GET["max_level"]) >= 0 && intval($_GET["max_level"]) <= 15){
                $this->filters["MAX_LEVEL"] = $_GET["max_level"];
            }
            if (isset($_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["min_original_quality"]) && intval($_GET["min_original_quality"]) >= QUALITY_ID::NORMAL && intval($_GET["min_original_quality"]) <= QUALITY_ID::LEGEND){
                $this->filters["MIN_ORIGINAL_QUALITY"] = $_GET["min_original_quality"];
            }
            if (isset($_GET["max_original_quality"]) && intval($_GET["max_original_quality"]) >= QUALITY_ID::NORMAL && intval($_GET["max_original_quality"]) <= QUALITY_ID::LEGEND){
                $this->filters["MAX_ORIGINAL_QUALITY"] = $_GET["max_original_quality"];
            }
            if (isset($_GET["assigned"]) && intval($_GET["assigned"]) >= 0 && intval($_GET["assigned"]) <= 4){
                $this->filters["ASSIGNED"] = $_GET["assigned"];
            }
        }

        /**
         * Builds the query to the artifact table using the a custom filter.
         * 
         * @param int $filter Custom filter ID.
         * @return string The query to be executed.
         * @global int Player ID.
         * @global resource Database connection.
         */
        private function build_custom_query($filter){
            global $UID;
            global $db;
            $s = "
              SELECT condition
              FROM filter
              WHERE
                uid = '$UID' AND
                id = $filter;
            ";
            $q = $db->query($s);
            $r = $q->fetchArray(SQLITE3_ASSOC);
            $cond = $r["condition"];
            $s = "
              SELECT
                id,
                assigned_to
              FROM artifact
              WHERE uid = '$UID' AND (
                $cond
              )
              ORDER BY slot, type, stars DESC, original_quality DESC, quality DESC, level;
            ";
            return $s;
        }

        /**
         * Builds the query to the artifact table using the selected or default
         * filters.
         * 
         * @return string The query to be executed.
         * @global int Player ID.
         */
        private function build_query(){
            global $UID;
            $s =
              "SELECT " .
              "  id, " .
              "  assigned_to " .
              "FROM artifact " .
              "WHERE " .
              "  uid = '$UID' AND " .
              "  level >= " . $this->filters["MIN_LEVEL"] . " AND " .
              "  level <= " . $this->filters["MAX_LEVEL"] . " AND " .
              "  quality >= " . $this->filters["MIN_QUALITY"] . " AND " .
              "  quality <= " . $this->filters["MAX_QUALITY"] . " AND " .
              "  original_quality >= " . $this->filters["MIN_ORIGINAL_QUALITY"] . " AND " .
              "  original_quality <= " . $this->filters["MAX_ORIGINAL_QUALITY"] . " AND " .
              "  efficiency >= " . $this->filters["MIN_EFFICIENCY"] . " AND " .
              "  efficiency <= " . $this->filters["MAX_EFFICIENCY"] . " AND " .
              "  max_efficiency >= " . $this->filters["MIN_MAX_EFFICIENCY"] . " AND " .
              "  max_efficiency <= " . $this->filters["MAX_MAX_EFFICIENCY"] . " ";
            if (count($this->filters["MAIN"]) > 0){
                $s = $s . " AND main_stat IN ( ";
                foreach($this->filters["MAIN"] as $t){
                    $s = $s . "$t, ";
                }
                $s = $s . "-1) ";
            }
            if (count($this->filters["ELEMENT"]) == 0 && count($this->filters["ARCHETYPE"]) == 0){
                // No element/archetype conditions
            }
            elseif (count($this->filters["ELEMENT"]) > 0 && count($this->filters["ARCHETYPE"]) == 0){
                // Only selected elements
                $s = $s . " AND attribute IN ( ";
                foreach($this->filters["ELEMENT"] as $t){
                    $s = $s . "$t, ";
                }
                $s = $s . "-1) ";
            }
            elseif (count($this->filters["ELEMENT"]) == 0 && count($this->filters["ARCHETYPE"]) > 0){
                // Only selected types
                $s = $s . " AND archetype IN ( ";
                foreach($this->filters["ARCHETYPE"] as $t){
                    $s = $s . "$t, ";
                }
                $s = $s . "-1) ";
            }
            elseif (count($this->filters["ELEMENT"]) > 0 && count($this->filters["ARCHETYPE"]) > 0){
                // Selected elements and selected types
                $s = $s . " AND (archetype IN ( ";
                foreach($this->filters["ARCHETYPE"] as $t){
                    $s = $s . "$t, ";
                }
                $s = $s . "-1) OR attribute IN ( ";
                foreach($this->filters["ELEMENT"] as $t){
                    $s = $s . "$t, ";
                }
                $s = $s . "-1)) ";
            }
            switch ($this->filters["ASSIGNED"]){
                case 1:
                    $s = $s . " AND assigned_to IS NOT NULL ";
                    break;
                case 2:
                    $s = $s . " AND assigned_to IS NULL ";
                    break;
                case 3:
                    $s = $s . " AND (assigned_to IS NULL OR assigned_to IN (SELECT DISTINCT id FROM unit WHERE building <> " . BUILDING_ID::MONSTER_STORAGE . ")) ";
                    break;
                case 4:
                    $s = $s . " AND assigned_to IN (SELECT DISTINCT id FROM unit WHERE building <> " . BUILDING_ID::MONSTER_STORAGE . ") ";
                    break;
            }
            $s = $s . " ORDER BY type, attribute, archetype, level DESC, original_quality DESC;";
            error_log($s);
            return $s;
        }
    }
?>