 <?php
/**
 * Team 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 . "Team.php");

/**
 * Team list page model.
 *
 * @category Page
 */
class Teams_Page extends Page{

    /**
     * @var Team[] Teams to show.
     */
    private $teams = [];

    /**
     * @var Unit[] List of all units for team creation.
     */
    private $units = [];
    
    /**
     * @var mixed[] Page filters
     */
    private $filters = [
        "NAME" => "",
        "AREA" => null
    ];

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

        $this->parse_filters();
        $result_set = $this->prepare_statement()->execute();
        while ($result = $result_set->fetchArray(SQLITE3_ASSOC)){
            array_push($this->teams, new Team($result["id"]));
        }
        $statement = get_context()->get_db()->prepare("
          SELECT id
          FROM unit
          WHERE player = :player;
        ");

        // Get all player units, for the team creation combos.
        $statement->bindValue(':player', get_context()->get_player()->get_id(), SQLITE3_TEXT);
        $result_set = $statement->execute();
        while ($result = $result_set->fetchArray(SQLITE3_ASSOC)){
            array_push($this->units, new Unit($result["id"], false));
        }
        $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["area"]) && APPLICATION::valid_id("AREA_TYPE_ID", $_GET["area"])){
            $this->filters["AREA"] = $_GET["area"];
        }
        if (isset($_GET["name"]) && strlen($_GET["name"]) > 0){
            $this->filters["NAME"] = SQLite3::escapeString($_GET["name"]);
        }
        return;
    }

    /**
     * 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 team
          WHERE player = :player
        ";
          
        if (APPLICATION::valid_id("AREA_TYPE_ID", $this->filters["AREA"])){
            $query .= " AND area_type  = :area ";
        }
        if ($this->filters["NAME"] != ""){
            $query .= " AND upper(name) LIKE :name ";
        }
        $query .= " ORDER BY area_type, area;";
        $statement = get_context()->get_db()->prepare($query);
        $statement->bindValue(":player", get_context()->get_player()->get_id(), SQLITE3_TEXT);
        $statement->bindValue(":area", $this->filters["AREA"], SQLITE3_INTEGER);
        $statement->bindValue(":name", "%" . $this->filters["NAME"] . "%", SQLITE3_TEXT);
        return $statement;
    }

    /**
     * Retrieves the teams to show.
     *
     * @return Team[] Selected teams.
     */
    public function get_teams(){
        return $this->teams;
    }

    /**
     * Retrieves $all of the player units.
     *
     * @return Unit Player units. 
     */
    public function get_units(){
        return $this->units;
    }
    
    /**
     * 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;
        }
    }


}