 <?php

    require_once($path["page"] . "Page.php");
    require_once($path["entity"] . "Unit.php");

    /**
     * Monster list page.
     */
    class Monsters_Page extends Page{

        /**
         * Array of @{see Monsters}s.
         */
        public $monsters = [];

        /**
         * The filters the page can handle.
         */
        public $filters = [
            "element" => "",
            "name" => "",
            "min_stars" => 1,
            "max_stars" => 6,
            "in_storage" => false,
            "without_runes" => false
        ];

        /**
         * Stats gained by building.
         */
        public $building_stats = [
            "atk" => 0,
            "def" => 0,
            "hp" => 0,
            "spd" => 0,
            "crd" => 0,
            "elm" => [
                0 => 0,
                1 => 0,
                2 => 0,
                3 => 0,
                4 => 0
            ]
        ];

        /**
         * Constructor.
         *
         * Retrieves the data and initializes the variables.
         *
         * @param SQLite3 $db Connection to the database.
         */
        public function __construct($db){
            global $path;
            global $root;
            parent::__construct($db);
            $this->view = $path["view"] . "monsters.php";
            $this->parse_filters();
            $this->calculate_buildings();
            $s_mon = $this->build_query();
            $q_mon = $this->db->query($s_mon);
            while ($r_mon = $q_mon->fetchArray(SQLITE3_ASSOC)){
                array_push($this->monsters, new Unit($db, $r_mon["id"]));
            }
            $this->title = "Monsters - SWDB";
            $this->description = "Owned monsters";
            $this->canonical = $root . "monsters/";
        }

        /**
         * Parses the request looking for the selected filters, validates them
         * and adds them to the $filters array.
         */
        private function parse_filters(){
            if (isset($_GET["element"])){
                $f_element = strtoupper($_GET["element"]);
                if ($f_element == "FIRE" || $f_element == "WATER" || $f_element == "WIND" || $f_element == "LIGHT" || $f_element == "DARK"){
                    $this->filters["element"] = $_GET["element"];
                }
            }
            if (isset($_GET["name"]) && strlen($_GET["name"]) > 0){
                $this->filters["name"] = SQLite3::escapeString($_GET["name"]);
            }
            if (isset($_GET["min_stars"]) && intval($_GET["min_stars"]) > 0 && intval($_GET["min_stars"]) < 7){
                $this->filters["min_stars"] = $_GET["min_stars"];
            }
            if (isset($_GET["max_stars"]) && intval($_GET["max_stars"]) > 0 && intval($_GET["max_stars"]) < 7){
                $this->filters["max_stars"] = $_GET["max_stars"];
            }
            if (isset($_GET["in_storage"]) && $_GET["in_storage"] == "on"){
                $this->filters["in_storage"] = true;
            }
            if (isset($_GET["without_runes"]) && $_GET["without_runes"] == "on"){
                $this->filters["without_runes"] = true;
            }
            return;
        }

        /**
         * Builds the query to the rune table using the selected or default
         * filters.
         *
         * @return The query to be executed.
         */
        private function build_query(){
            $s = "SELECT unit.id AS id FROM unit, k_unit WHERE unit.unit = k_unit.id AND stars >= " . $this->filters["min_stars"] . " AND stars <= " . $this->filters["max_stars"];
            if (strlen($this->filters["element"]) > 0){
                $s = $s . " AND unit IN (SELECT id FROM k_unit WHERE upper(element) = '" . strtoupper($this->filters["element"]) . "') ";
            }
            if ($this->filters["name"] != ""){
                $s = $s . " AND unit IN (SELECT id FROM k_unit WHERE upper(name) LIKE '%" . strtoupper($this->filters["name"]) . "%') ";
            }
            if ($this->filters["in_storage"]){
                $s = $s . " AND in_storage = 0 ";
            }
            if (!$this->filters["without_runes"]){
                $s = $s . " AND unit.id IN (SELECT DISTINCT assigned_to FROM rune) ";
            }
            $s = $s .
              " ORDER BY " .
              "  stars DESC, " .
              "  level DESC, " .
              "  element = 'Fire' DESC, " .
              "  element = 'Water' DESC, " .
              "  element = 'Wind' DESC, " .
              "  element = 'Light' DESC, " .
              "  element = 'Dark' DESC; ";
            return $s;
        }

        /**
         * Calculates the stats gained from bulding upgrades and populates the
         * $building_stats array.
         */
        private function calculate_buildings(){
            global $STAT;
            $s =
              "SELECT " .
              "  affected_stat, " .
              "  bonus, " .
              "  element " .
              "FROM " .
              "  k_decoration, " .
              "  k_decoration_level, " .
              "  decoration " .
              "WHERE " .
              "  k_decoration.id = decoration.decoration AND " .
              "  decoration.decoration = k_decoration_level.decoration AND " .
              "  decoration.level = k_decoration_level.level AND " .
              "  area = 'Everywhere' AND " .
              "  affected_stat IN ('ATK', 'DEF', 'HP', 'SPD', 'CRI Dmg');";
            $q = $this->db->query($s);
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                switch($r["affected_stat"]){
                    case $STAT["DEF"]:
                        $this->building_stats["def"] += $r["bonus"];
                        break;
                    case $STAT["HP"]:
                        $this->building_stats["hp"] += $r["bonus"];
                        break;
                    case $STAT["SPD"]:
                        $this->building_stats["spd"] += $r["bonus"];
                        break;
                    case $STAT["CRIT_DMG"]:
                        $this->building_stats["crd"] += $r["bonus"];
                        break;
                    case $STAT["ATK"]:
                        if(strlen($r["element"]) > 0){
                            $this->building_stats["elm"][$r["element"]] += $r["bonus"];
                        }
                        else{
                            $this->building_stats["atk"] += $r["bonus"];
                        }
                        break;
                }
            }
        }
    }
?>