<?php
namespace Participo\Attendance;

require_once "participoLib/dbConnector.php";

// @todo There are multiple functions aof that name and similar usage. Check possible single sourcing!
function processPostData($db, $post, $redirectLocation = "."): void
{
    if (\array_key_exists("action", $post)) {
        if ($post["action"] == "giveAttendance") {
            giveJudokasAttendence(
                $post["attandanceDate"],
                $post["judokaIdsInTraining"],
            );
        }
        if ($post["action"] == "updateCoronaData") {
            updateCoronaData(
                $post["userId"],
                $post["columnName"],
                $post["columnValue"],
            );
        }
        if ($post["action"] == "addCoronaUser") {
            if (
                array_keys_exist($post, [
                    "name",
                    "vorname",
                    "corona_PLZ",
                    "corona_telephon",
                    "corona_eMail",
                ]) &&
                isValid($post["corona_PLZ"], "plz") &&
                isValid($post["corona_telephon"], "phonenumber") &&
                isValid($post["corona_eMail"], "email")
            ) {
                addCoronaUser(
                    $db,
                    $post["name"],
                    $post["vorname"],
                    $post["corona_PLZ"],
                    $post["corona_telephon"],
                    $post["corona_eMail"],
                );
                $redirectLocation .= "?addCoronaUserSuccess=true";
            } else {
                $redirectLocation .= "?addCoronaUserSuccess=false";
            }
            $redirectLocation .= "#addCoronaUser";
        }
        if ($post["action"] == "sendAttandeesPerEmail") {
            sendEmail($post["toEmail"], $post["emailText"]);
        }
        header("Location: {$redirectLocation}");
    }
    return;
}

function attendancesAssocArray2mdList($attendancesAssocArray, $date = null)
{
    if ($date == null) {
        $date = new \DateTime();
    }
    $ret =
        "# Anwesenheitsliste zur Corona-Kontaktverfolgung der Abteilung Judo des CWSV vom " .
        $date->format("Y-m-d") .
        "\n\n";
    foreach ($attendancesAssocArray as $d => $attendees) {
        $ret .= "## {$d}\n";
        $i = 0;
        foreach ($attendees as $a) {
            $i += 1;
            $ret .= "\n";
            $ret .= $i . " " . $a["name"] . ", " . $a["vorname"] . "\n";
            $ret .= "    - PLZ: " . $a["corona_PLZ"] . "\n";
            $ret .= "    - Tel.: " . $a["corona_telephon"] . "\n";
            $ret .= "    - eMail: " . $a["corona_eMail"] . "\n";
        }
        $ret .= "\n";
    }
    return $ret;
}

function attendancesAssocArray2text($attendancesAssocArray)
{
    $ret = "";
    foreach ($attendancesAssocArray as $date => $attendees) {
        $ret .= "{$date}\n";
        foreach ($attendees as $a) {
            $ret .= "\n";
            $ret .= "Name: " . $a["name"] . ", " . $a["vorname"] . "\n";
            $ret .= "PLZ: " . $a["corona_PLZ"] . "\n";
            $ret .= "Tel.: " . $a["corona_telephon"] . "\n";
            $ret .= "eMail: " . $a["corona_eMail"] . "\n";
        }
        $ret .= "\n";
    }
    return $ret;
}

function sendEmail($toEmail, $emailText)
{
    try {
        $date = new \DateTime();
        mail(
            $toEmail,
            "Kontakliste CWSV-Judo vom " . $date->format("Y-m-d"),
            $emailText,
        );
    } catch (\Exception $e) {
        echo "Message: " . $e->getMessage();
    }
}

/// Validaing a phone number
/// true if it validates, false if not
/// @todo input validation functions should be together (wherever the filterInit etc. are..)
function validate_phone_number($phone)
{
    // Allow +, - and . in phone number
    $filtered_phone_number = filter_var($phone, FILTER_SANITIZE_NUMBER_INT);
    // Remove "-" from number
    $phone_to_check = str_replace("-", "", $filtered_phone_number);
    // Check the lenght of number
    // This can be customized if you want phone number from a specific country
    if (\strlen($phone_to_check) < 10 || \strlen($phone_to_check) > 14) {
        return false;
    } else {
        return true;
    }
}

/// validate different types of input
/// @todo input validation functions should be together (wherever the filterInit etc. are..)
function isValid($toValidate, $type)
{
    // for now we disable the name validation: what do i know how people can be called!
    // $regexName="/^[A-Z][a-zA-Z]*$/";
    $regexPlz = "/^[0-9]{5}$/";
    return match ($type) {
        "plz" => preg_match($regexPlz, $toValidate) > 0,
        "phonenumber" => validate_phone_number($toValidate),
        "email" => filter_var($toValidate, FILTER_VALIDATE_EMAIL),
        default => false,
    };
}

//! Checks if multiple keys exist in an array
//!
//! @param array $array array to check for key
//! @param array|string $keys keys to check for
//!
//! @return bool true, if *all* keys are set in the array
function array_keys_exist(array $array, $keys)
{
    if (!\is_array($keys)) {
        $keys = \func_get_args();
        array_shift($keys);
    }
    $count = 0;
    foreach ($keys as $key) {
        if (isset($array[$key]) || \array_key_exists($key, $array)) {
            $count++;
        }
    }

    return \count($keys) === $count;
}

function giveJudokasAttendence($date, $ids)
{
    $values = [];
    try {
        foreach ($ids as $id) {
            array_push($values, "(\"{$date}\", {$id})");
        }
        $query =
            "INSERT INTO `anwesenheit` (`date`, `userId`) VALUES " .
            join(",", $values) .
            ";";
        \dbConnector::query($query, [], ["dontFetch" => true]);
    } catch (\PDOException $db_error) {
        print "Error!: " . $db_error->getMessage() . "<br/>";
        return null;
    }
}

// updates corona data of an user
function updateCoronaData($userId, $columnName, $columnValue)
{
    $coronaColumnNames = ["corona_PLZ", "corona_telephon", "corona_eMail"];

    if (!\in_array($columnName, $coronaColumnNames)) {
        return;
    }
    $query = "UPDATE `wkParticipo_Users` SET ` {$columnName} `=:val WHERE `id`=:id;";
    $params = [
        ":val" => ["value" => $columnValue, "data_type" => \PDO::PARAM_STR],
        ":id" => ["value" => $userId, "data_type" => \PDO::PARAM_INT],
    ];
    \dbConnector::query($query, $params);
    return;
}

function addCoronaUser(
    $name,
    $vorname,
    $corona_PLZ,
    $corona_telephon,
    $corona_eMail,
) {
    $query = <<<SQL
    INSERT INTO `wkParticipo_Users` (name, vorname, corona_PLZ, corona_telephon, corona_eMail)
    VALUES (:name, :vorname, :plz, :telephon, :email);
    SQL;
    $params = [
        ":name" => ["value" => $name, "data_type" => \PDO::PARAM_STR],
        ":vorname" => ["value" => $vorname, "data_type" => \PDO::PARAM_STR],
        ":plz" => ["value" => $corona_PLZ, "data_type" => \PDO::PARAM_STR],
        ":telephon" => [
            "value" => $corona_telephon,
            "data_type" => \PDO::PARAM_STR,
        ],
        ":email" => ["value" => $corona_eMail, "data_type" => \PDO::PARAM_STR],
    ];
    \dbConnector::query($query, $params);

    $newId = \dbConnector::getDbConnection()->lastInsertId();
    giveUserAnUserAttribute($newId, "inTraining");
    return;
}