<?php

require '../../backend.php';

$db_host = $savvyext->cfgReadChar('database.host');
$db_name = $savvyext->cfgReadChar('database.name');
$db_user = $savvyext->cfgReadChar('database.user');
$db_pass = $savvyext->cfgReadChar('database.pass');
$db_port = $savvyext->cfgReadLong('database.port');

$connstr = "host=${db_host} port=${db_port} dbname=${db_name} user=${db_user} password=${db_pass}";
$con = null;

$worker = new GearmanWorker();
$worker->addServers("127.0.0.1:4730");

$worker->addFunction("processExistingWeatherDataWorker", function (GearmanJob $job) {
    global $con, $connstr;
    $con = pg_connect($connstr) or die("Could not connect to server\n");

    $workload = json_decode($job->workload(), true);

    execute($workload);

    echo "Waiting for job...\n";
});

while($worker->work())
{
  if ($worker->returnCode() != GEARMAN_SUCCESS)
  {
    echo "return_code: " . $worker->returnCode() . "\n";
    break;
  }
}

/* ********************** FUNCTION ********************** */
function execute($workload)
{
    $weather_records_for_specific_date = get_weather_data_by_coor_and_date_in_weather_table($workload['travel_date'], $workload['location_start_lat'], $workload['location_start_lng']);
    if (!empty($weather_records_for_specific_date)) {
        insert_trip_weather_with_existing_weather_data($workload['root_id'], $workload['root_type'], $weather_records_for_specific_date, $workload['travel_date']);
    }
}

function get_weather_data_by_coor_and_date_in_weather_table(string $travel_date, float $location_start_lat, float $location_start_lng): array
{
    global $con;
    $query = "
        SELECT
            id, time
        FROM
            weather
        WHERE
            date = '" . $travel_date . "'
            AND latitude = " . $location_start_lat . "
            AND longitude = " . $location_start_lng . "
    ";
    $rs = pg_query($con, $query);
    if (!$rs) {
      echo "Cannot execute query: $query\n";
    }
    
    $result = [];
    while ($rs && $row = pg_fetch_object($rs)) {
      $result[] = [
        'id' => $row->id,
        'time' => $row->time
      ];
    }

    return $result;
}

function insert_trip_weather_with_existing_weather_data(int $root_id, int $root_type, array $weather_records_for_specific_date, string $date)
{
    global $con;

    // find the trip/quote that has the same (root_id, root_type and travel_date) in trip_price_comparison table
    $find_trip_query = "
    (SELECT
        tpc.data_source_id,
        tpc.data_source,
        pitm.travel_date
      FROM
        trip_price_comparison tpc
        INNER JOIN parsedemail_item pitm ON pitm.id = tpc.data_source_id
          AND tpc.data_source = 1
          AND root_id = ${root_id}
          AND root_type = ${root_type}
      WHERE
        pitm.travel_date IS NOT NULL
        AND to_char(pitm.travel_date, 'YYYY-MM-DD') = '${date}')
    UNION (
      SELECT
        tpc.data_source_id,
        tpc.data_source,
        q.completed as travel_date
      FROM
        trip_price_comparison tpc
        INNER JOIN quotes q ON q.id = tpc.data_source_id
          AND tpc.data_source = 2
          AND root_id = ${root_id}
          AND root_type = ${root_type}
      WHERE
        q.completed IS NOT NULL
        AND to_char(q.completed, 'YYYY-MM-DD') = '${date}')
  ";

    $rs = pg_query($con, $find_trip_query);
    if (!$rs) {
      echo "Cannot execute query: $find_trip_query\n";
    }

    echo "[" . date("Y-m-d H:i:s") . "] Processing trip_weather with root_id = ${root_id}, root_type = ${root_type}, date = ${date}\n";
    while ($rs && $row = pg_fetch_object($rs)) {
        $travel_date = $row->travel_date; // format: YYYY-MM-DD HH:II:SS

        // convert $travel_date format from YYYY-MM-DD HH:II:SS to YYYY-MM-DD HH:00:00
        $travel_date = substr($travel_date, 0, 13) . ':00:00';

        // purpose: to compare travel date with weather date (YYYY-MM-DD HH:00:00)
        $key = array_search($travel_date, array_column($weather_records_for_specific_date, 'time'));

        if ($key === FALSE) {
            continue;
        }

        $weather_id = $weather_records_for_specific_date[$key]['id'];

        $insert_query = "INSERT INTO trip_weather(data_source_id, data_source, weather_id) VALUES 
                        ('" . pg_escape_string($row->data_source_id) . "', '" . pg_escape_string($row->data_source) . "', '" . pg_escape_string($weather_id) . "')
                        ON CONFLICT (data_source_id,data_source) DO NOTHING;";

        $insert_rs = pg_query($con, $insert_query);
    }
}