<?php

    /**
     * File for the optimization action.
     *
     * Implements an action function to be called from the {@see Controller}.
     * 
     * @category Action
     */

    /**
     * Executes the optimization action.
     *
     * Reads the POST parameters looking for the following KEYS:
     *  mail
     *  pass + currentPass
     *  api
     * Then it updates the selected info with the prameter vlue. Multiple
     * itemas can be updated at the same time.
     * 
     * @return int|string 0 on success, negative values on error. If the API
     * key has been updated, the new key.
     * @category Action
     * @global resource Database connection.
     */
    function action(){

        global $db;

        $response = null;

        $uid = filter_input(INPUT_POST, 'uid');
        if ($uid == null){
error_log("-1");
            return -1;
        }

        $unit = filter_input(INPUT_POST, 'unit');
        if ($uid == null){
error_log("-2");
            return -2;
        }

        // Sets
        // TODO: Check if valid.
        // TODO: Check if compatible sets, not just size.
        $sets = [];
        foreach ($_POST["set"] as $x){
            array_push($sets, intval($x));
        }
        if (sizeof($sets) < 2 || sizeof($sets) > 3){
error_log("-3");
            return -3;
        }

        // Main stats in even slots.
        // TODO: Check if valid.
        // TODO: Check if valid per slot
        $stats = [];
        foreach ($_POST["stat"] as $x){
            array_push($stats, intval($x));
        }

        $source = filter_input(INPUT_POST, 'source');
        if ($source == null){
error_log("-4");
            return -4;
        }

        $tuning = filter_input(INPUT_POST, 'tuning');
        if ($tuning == null){
error_log("-5");
            return -5;
        }

        // Get optimization id and create the view:
        $optmization_id = $uid . "-" . $unit . "-" . rand(0,1000);
        $db->query($s);
        $s = "
          SELECT *
          FROM rune
          WHERE
            uid = $uid AND
            set IN (
        ";
        foreach ($sets as $set){
            $s .= ($set . ",");
        }
        $s .= "-1) AND ";
        switch ($source){
            case 0: // Storage only
                $s .= "assigned_to IS NULL";
                break;
            case 1: // Units in no teams
                $s .= "
                  (
                    assigned_to IS NULL OR 
                    assigned_to NOT IN (SELECT DISTINCT unit FROM team_unit)
                  )
                ";
                break;
            case 2: // Units in teams with 0 score
                $s .= "
                  (
                    assigned_to IS NULL OR 
                    assigned_to NOT IN (SELECT DISTINCT unit FROM team_unit) OR
                    assigned_to NOT IN (
                      SELECT DISTINCT unit 
                      FROM
                        team,
                        team_unit
                      WHERE
                        team.id = team_unit.team AND
                        team.score > 0
                    )
                  )
                ";
                break;
            case 3: // Units with lower overall score
                // TODO
                break;
            case 4: // All runes - dont filter
                $s .= " 1 = 1 ";
                break;
            default: // Invalid options - return nothing
                $s .= " 1 = 0 ";
        }

error_log($s);
        $response = $s;

        if ($response == null){
            return 0;
        }
        else{
            return $response;
        }
    }
?>