<?php

    namespace Modules\Webstatement\Jobs;

    use Exception;
    use Illuminate\Bus\Queueable;
    use Illuminate\Contracts\Queue\ShouldQueue;
    use Illuminate\Foundation\Bus\Dispatchable;
    use Illuminate\Queue\InteractsWithQueue;
    use Illuminate\Queue\SerializesModels;
    use Illuminate\Support\Facades\Log;
    use Illuminate\Support\Facades\Storage;
    use Modules\Webstatement\Models\AtmTransaction;

    class ProcessAtmTransactionJob implements ShouldQueue
    {
        use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

        // Konstanta untuk nilai-nilai statis
        private const FILE_EXTENSION = '.ST.ATM.TRANSACTION.csv';
        private const CSV_DELIMITER  = '~';
        private const DISK_NAME      = 'sftpStatement';
        private const HEADER_MAP     = [
            'id'               => 'transaction_id',
            'card_acc_id'      => 'card_acc_id',
            'pan_number'       => 'pan_number',
            'txn_type'         => 'txn_type',
            'merchant_id'      => 'merchant_id',
            'txn_amount'       => 'txn_amount',
            'booking_date'     => 'booking_date',
            'trans_ref'        => 'trans_ref',
            'retrieval_ref_no' => 'retrieval_ref_no',
            'stmt_nos'         => 'stmt_nos',
            'debit_acct_no'    => 'debit_acct_no',
            'credit_acct_no'   => 'credit_acct_no',
            'chrg_amount'      => 'chrg_amount',
            'value_date'       => 'value_date',
            'stan_no'          => 'stan_no',
            'trans_status'     => 'trans_status',
            'proc_code'        => 'proc_code'
        ];

        // Pemetaan bidang header ke kolom model
        protected string $period;

        /**
         * Create a new job instance.
         */
        public function __construct(string $period = '')
        {
            $this->period = $period;
        }

        /**
         * Execute the job.
         */
        public function handle()
        : void
        {
            try {
                set_time_limit(24 * 60 * 60);

                if ($this->period === '') {
                    Log::warning('No period provided for ATM transaction data processing');
                    return;
                }

                $stats = $this->processPeriodFile();

                Log::info("ProcessAtmTransactionJob completed. Total processed: {$stats['processed']}, Total errors: {$stats['errors']}");
            } catch (Exception $e) {
                Log::error("Error in ProcessAtmTransactionJob: " . $e->getMessage());
                throw $e;
            }
        }

        /**
         * Process a single period file
         */
        private function processPeriodFile()
        : array
        {
            $disk           = Storage::disk(self::DISK_NAME);
            $filename       = $this->period . self::FILE_EXTENSION;
            $filePath       = "{$this->period}/$filename";
            $processedCount = 0;
            $errorCount     = 0;

            Log::info("Processing ATM transaction file: $filePath");

            if (!$disk->exists($filePath)) {
                Log::warning("File not found: $filePath");
                return ['processed' => 0, 'errors' => 0];
            }

            $tempFilePath = $this->createTempFile($disk, $filePath, $filename);

            $result         = $this->processCSVFile($tempFilePath, $filePath);
            $processedCount += $result['processed'];
            $errorCount     += $result['errors'];

            // Clean up the temporary file
            if (file_exists($tempFilePath)) {
                unlink($tempFilePath);
            }

            Log::info("Completed processing $filePath. Processed {$result['processed']} records with {$result['errors']} errors.");

            return [
                'processed' => $processedCount,
                'errors'    => $errorCount
            ];
        }

        /**
         * Create a temporary file for processing
         */
        private function createTempFile($disk, string $filePath, string $filename)
        : string
        {
            $tempFilePath = storage_path("app/temp_$filename");
            file_put_contents($tempFilePath, $disk->get($filePath));
            return $tempFilePath;
        }

        /**
         * Process a CSV file and import data
         */
        private function processCSVFile(string $tempFilePath, string $originalFilePath)
        : array
        {
            $processedCount = 0;
            $errorCount     = 0;

            $handle = fopen($tempFilePath, "r");
            if ($handle === false) {
                Log::error("Unable to open file: $originalFilePath");
                return ['processed' => 0, 'errors' => 0];
            }

            // Get the headers from the first row
            $headerRow = fgetcsv($handle, 0, self::CSV_DELIMITER);
            if (!$headerRow) {
                fclose($handle);
                return ['processed' => 0, 'errors' => 0];
            }

            $rowCount = 0;
            while (($row = fgetcsv($handle, 0, self::CSV_DELIMITER)) !== false) {
                $rowCount++;

                if (count($headerRow) !== count($row)) {
                    Log::warning("Row $rowCount in $originalFilePath has incorrect column count. Expected: " . count($headerRow) . ", Got: " . count($row));
                    continue;
                }

                $result         = $this->processRow($headerRow, $row, $rowCount, $originalFilePath);
                $processedCount += $result['processed'];
                $errorCount     += $result['errors'];
            }

            fclose($handle);

            return [
                'processed' => $processedCount,
                'errors'    => $errorCount
            ];
        }

        /**
         * Process a single row from the CSV file
         */
        private function processRow(array $headerRow, array $row, int $rowCount, string $filePath)
        : array
        {
            // Combine the header row with the data row
            $rawData = array_combine($headerRow, $row);

            // Map the raw data to our model fields
            $data = [];
            foreach (self::HEADER_MAP as $csvField => $modelField) {
                $data[$modelField] = $rawData[$csvField] ?? null;
            }

            // Skip header row if it was included in the data
            if ($data['transaction_id'] === 'id') {
                return ['processed' => 0, 'errors' => 0];
            }

            try {
                // Format dates if needed
                /*if (!empty($data['booking_date'])) {
                    $data['booking_date'] = date('Y-m-d H:i:s', strtotime($data['booking_date']));
                }

                if (!empty($data['value_date'])) {
                    $data['value_date'] = date('Y-m-d H:i:s', strtotime($data['value_date']));
                }*/

                // Create or update the record
                AtmTransaction::updateOrCreate(
                    ['transaction_id' => $data['transaction_id']],
                    $data
                );

                return ['processed' => 1, 'errors' => 0];
            } catch (Exception $e) {
                Log::error("Error processing row $rowCount in $filePath: " . $e->getMessage());
                return ['processed' => 0, 'errors' => 1];
            }
        }
    }