 <?php

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

    /**
     * Upgradeable runes report page.
     */
    class Report_Runeupgrade_Page extends Page{

        /**
         * Filtrs the eport can handle.
         */
        public $filters = [
            "min_stars" => 5,
            "max_stars" => 6,
            "in_storage" => true,
        ];

        /**
         * List of available upgrades. Can be described as:
         * $upgrades = [
         *   [
         *     monster (Monster),
         *     upgrade = [
         *       [
         *         rune (Rune),
         *         alternative = [(Rune)]
         *       ]
         *     ]
         *   ]
         * ]
         */
        public $upgrades = [];

        /**
         * 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"] . "report_runeupgrade.php";
            $this->parse_filters();
            $s = $this->build_query();
            $q = $this->db->query($s);
            $prev_monster = "";
            $prev_rune = "";
            $upgrade = null;
            $rupgrade = null;
            $rune_i = 0; // DEBUG
            while ($r = $q->fetchArray(SQLITE3_ASSOC)){
                if ($r["monster"] != $prev_monster){
                    if ($prev_rune != ""){
                        array_push($upgrade["upgrade"], $rupgrade);
                    }
                    if ($prev_monster != ""){
                        array_push($this->upgrades, $upgrade);
                    }
                    $prev_monster = $r["monster"];
                    $prev_rune = "";
                    $upgrade = [
                        "monster" => new Monster($this->db, $r["monster"]),
                        "upgrade" => [],
                    ];
                    $rupgrade = [
                        "rune" => new Rune($this->db, $r["id"]),
                        "alternative" => [],
                    ];
                }
                if ($r["id"] != $prev_rune){
                    if ($prev_rune != ""){
                        array_push($upgrade["upgrade"], $rupgrade);
                    }
                    $prev_rune = $r["id"];
                    $rupgrade = [
                        "rune" => new Rune($this->db, $r["id"]),
                        "alternative" => [],
                    ];
                }
                array_push($rupgrade["alternative"], new Rune($this->db, $r["alternative"]));
                $rune_i ++;
            }
            // Last entries
            array_push($upgrade["upgrade"], $rupgrade);
            array_push($this->upgrades, $upgrade);
            $this->title = "Replaceable runes - SWDB";
            $this->description = "Find equiped runes that can be substituted for better ones.";
            $this->canonical = $root . "report/runeupgrade/";
        }

        /**
         * Parses the filters passed in the request and sets $filters.
         * Filters must be in $_GET, nd the available ones are max_stars (1-6),
         * min_stars (1-6) and in_storage (on/off).
         */
        private function parse_filters(){
            if (isset($_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"] = false;
            }
            return;
        }

        /**
         * Builds the query for the page, using the providded or default filters.
         *
         * @return The query to be executed.
         */
        private function build_query(){
            $s =
              "  SELECT " .
              "  monster.id AS monster, " .
              "  rune.id AS id, " .
              "  rune_alt.id AS alternative " .
              "FROM " .
              "  rune, " .
              "  rune rune_alt, " .
              "  monster " .
              "WHERE " .
              "  monster.id = rune.assigned_to AND " .
              "  monster.stars >= " . $this->filters["min_stars"] . " AND " .
              "  monster.stars <= " . $this->filters["max_stars"] . " AND " .
              "  rune.assigned_to IS NOT NULL AND " .
              "  rune_alt.assigned_to IS NULL AND " .
              "  rune.type = rune_alt.type AND " .
              "  rune.slot = rune_alt.slot AND " .
              "  rune.main_stat = rune_alt.main_stat AND " .
              "  ( " .
              "    rune_alt.stars > rune.stars OR " .
              "    ( " .
              "      rune_alt.stars = rune.stars AND " .
              "      rune_alt.original_quality > rune.original_quality" .
              "    ) " .
              "  ) ";
            if (!$this->filters["in_storage"]){
                $s = $s . " AND monster.in_storage = 0 ";
            }
            $s = $s .
              "ORDER BY " .
              "  monster.stars DESC, " .
              "  monster.level DESC, " .
              "  monster.id, " .
              "  rune.slot, " .
              "  id, " .
              "  rune_alt.stars, " .
              "  rune_alt.original_quality, " .
              "  rune_alt.main_stat_value;";
            return $s;
        }
    }
?>