<?php

require_once(__DIR__ . '/../../vendor/autoload.php');

use Symfony\Component\Dotenv\Dotenv;

// load csv
$csv = fopen($argv[1], 'r');
$dsn = $argv[2];
$output_file = $argv[3];

$output_fh = fopen($output_file, "w");

if (!file_exists($argv[1]))
{
    $err_message =  "No csv input file found." .  "\n";
    fwrite($output_fh, $err_message);
    fclose($output_fh);
    exit();
}

// get username and password
$dotenv = new Dotenv();
$dotenv->loadEnv(__DIR__.'/../../.env');

$user = $_ENV['DB_USER'];
$pass = $_ENV['DB_PASSWORD'];

// connect to db
$db = new PDO($dsn, $user, $pass);

// prepared statement
$sth = $db->prepare('insert into warranty_serial (id, sku, date_create, source, meta_info) values (:serial, :sku, :date_create, :source, :meta_info)');

// go through rows
$source = 'motiv';
while (($row = fgetcsv($csv)) !== false)
{
    // TODO: verify if these are still the headers if there are headers
    // possible lines in output file:
    // (1) header in csv file
    // SerialNumber,Sku,DispatchStatus,CreatedDate,InventoryStatus,CategoryID,CategoryName
    // (2) No available data
    // (3) CH2000012071,WCHD23BL-CPN00-LX,0,2020-08-11 04:05:27.090,0,4,CHAMPION MF
    // (4) Empty line
    // (5) empty sku

    // check if No available data
    if ($row[0] == 'No available data')
    {
        // skip the line
        error_log('No available data, skipping the line...');
        continue;
    }

    // check if empty line
    if ($row == array(null))
    {
        // skip
        error_log('Skipping empty line...');
        continue;
    }

    // check if empty serial
    if (empty($row[0]))
    {
        $err_message = "Empty serial. " . "\n";
        fwrite($output_fh, $err_message);
        continue;
    }

    // sample of line in output file:
    // serial number, sku, dispatch status, created date, inventory status, category id, category name
    // CH2000012071,WCHD23BL-CPN00-LX,0,2020-08-11 04:05:27.090,0,4,CHAMPION MF
    // MG2000313690,N/A,1,2021-05-14T23:47:30.6430000+08:00,0,10,GOLD
    $serial = trim(strtoupper($row[0]));
    $sku = trim(strtoupper($row[1]));
    $dispatch_status = trim($row[2]);
    $str_date_create = trim($row[3]);
    $inventory_status = trim($row[4]);
    $cat_id = trim($row[5]);
    $cat_name = trim(strtoupper($row[6]));

    error_log('Processing ' . $serial . ' and ' . $sku);

    // since some people cannot follow simple instructions...
    // check the date format on the string
    // try 2021-05-15T08:35:46+08:00 format on str_date_create
    $date_create = DateTime::createFromFormat('Y-m-d\TH:i:sP', $str_date_create);

    if ($date_create == false)
    {
        // try this format: 2021-05-15T08:47:20.3330000+08:00
        // get the date, time and timezone from str_date_create
        $str_date_time = substr($str_date_create, 0, 19);
        $str_timezone = substr($str_date_create, 27);
        $str_datetime_tz = $str_date_time . $str_timezone;

        // create DateTime object
        // sample: 2021-05-15T12:16:06+08:00
        $date_create = DateTime::createFromFormat('Y-m-d\TH:i:sP', $str_datetime_tz);

        // check if datetime object was created
        // if not, someone f*cked up and we have no date create
        if ($date_create == false)
        {
            // log the serial
            $message = "$serial - ERROR - " . "Invalid date format for create date." . "\n";
            fwrite($output_fh, $message);
            continue;
        }
    }

    $created_date = $date_create->format('Y-m-d H:i:s');

    //error_log($str_date_time);
    //error_log($str_timezone);
    //error_log($str_datetime_tz);
    //error_log($date_create->format('Y-m-d H:i:s'));

    $meta_info = [
        'dispatch_status' => $dispatch_status,
        'inventory_status' => $inventory_status,
        'category_id' => $cat_id,
        'category_name' => $cat_name,
    ];

    $info = json_encode($meta_info);

    if ($sku == 'N/A')
        $sku = null;

    $res = $sth->execute([
        ':serial' => $serial,
        ':sku' => $sku,
        ':date_create' => $created_date,
        ':source' => $source,
        ':meta_info' => $info,
    ]);

    if (!$res)
    {
        // log the error
        $err = $sth->errorInfo();
        $err_message =  "$serial - ERROR - " . $err[2] . "\n";
        fwrite($output_fh, $err_message);
    }
    else
    {
        // log successful adding of serial
        $message = "$serial - SUCCESS - " . "\n";
        fwrite($output_fh, $message);
    }
}

// close file
fclose($csv);
fclose($output_fh);