<?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\Basicdata\Models\Branch;

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

        private const CSV_DELIMITER      = '~';
        private const MAX_EXECUTION_TIME = 86400; // 24 hours in seconds
        private const FILENAME           = 'ST.COMPANY.csv';
        private const DISK_NAME          = 'staging';
        private const FIELD_MAP          = [
            'id'                => null, // Not mapped to model
            'date_time'         => null, // Not mapped to model
            'company_code'      => 'code',
            'company_name'      => 'name',
            'name_address'      => 'address',
            'mnemonic'          => 'mnemonic',
            'customer_company'  => 'customer_company',
            'customer_mnemonic' => 'customer_mnemonic',
            'company_group'     => 'company_group',
            'curr_no'           => 'curr_no',
            'co_code'           => 'co_code',
            'l_vendor_atm'      => 'l_vendor_atm',
            'l_vendor_cpc'      => 'l_vendor_cpc'
        ];
        private const BOOLEAN_FIELDS     = ['l_vendor_atm', 'l_vendor_cpc'];

        private string $period = '';
        private int    $processedCount = 0;
        private int    $errorCount     = 0;

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

        /**
         * Execute the job.
         */
        public function handle()
        : void
        {
            try {
                $this->initializeJob();

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

                $this->processPeriod();
                $this->logJobCompletion();
            } catch (Exception $e) {
                Log::error('Error in ProcessCompanyDataJob: ' . $e->getMessage());
                throw $e;
            }
        }

        private function initializeJob()
        : void
        {
            set_time_limit(self::MAX_EXECUTION_TIME);
            $this->processedCount = 0;
            $this->errorCount     = 0;
        }

        private function processPeriod()
        : void
        {
            $disk     = Storage::disk(self::DISK_NAME);
            $filename = "{$this->period}." . self::FILENAME;
            $filePath = "{$this->period}/$filename";

            if (!$this->validateFile($disk, $filePath)) {
                return;
            }

            $tempFilePath = $this->createTemporaryFile($disk, $filePath, $filename);
            $this->processFile($tempFilePath, $filePath);
            $this->cleanup($tempFilePath);
        }

        private function validateFile($disk, string $filePath)
        : bool
        {
            Log::info("Processing company file: $filePath");

            if (!$disk->exists($filePath)) {
                Log::warning("File not found: $filePath");
                return false;
            }

            return true;
        }

        private function createTemporaryFile($disk, string $filePath, string $filename = self::FILENAME)
        : string
        {
            $tempFilePath = storage_path("app/temp_$filename");
            file_put_contents($tempFilePath, $disk->get($filePath));
            return $tempFilePath;
        }

        private function processFile(string $tempFilePath, string $filePath)
        : void
        {
            $handle = fopen($tempFilePath, "r");
            if ($handle === false) {
                Log::error("Unable to open file: $filePath");
                return;
            }

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

                // Skip header row if it exists
                if ($rowCount === 1 && (strtolower($row[0]) === 'id' || strtolower($row[2]) === 'company_code')) {
                    continue;
                }

                $this->processRow($row, $rowCount, $filePath);
            }

            fclose($handle);
            Log::info("Completed processing $filePath. Processed {$this->processedCount} records with {$this->errorCount} errors.");
        }

        private function processRow(array $row, int $rowCount, string $filePath)
        : void
        {
            // Exclude the last field from CSV
            if (count($row) > 0) {
                array_pop($row);
                Log::info("Excluded last field from row $rowCount. New column count: " . count($row));
            }

            $csvHeaders = array_keys(self::FIELD_MAP);

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

            $csvData = array_combine($csvHeaders, $row);
            $this->mapAndSaveRecord($csvData, $rowCount, $filePath);
        }

        private function mapAndSaveRecord(array $csvData, int $rowCount, string $filePath)
        : void
        {
            // Map CSV data to Branch model fields
            $branchData = [];
            foreach (self::FIELD_MAP as $csvField => $modelField) {
                if ($modelField !== null && isset($csvData[$csvField])) {
                    // Convert string boolean values to actual booleans for boolean fields
                    if (in_array($modelField, self::BOOLEAN_FIELDS)) {
                        $branchData[$modelField] = filter_var($csvData[$csvField], FILTER_VALIDATE_BOOLEAN);
                    } else {
                        $branchData[$modelField] = $csvData[$csvField];
                    }
                }
            }

            $this->saveRecord($branchData, $rowCount, $filePath);
        }

        private function saveRecord(array $branchData, int $rowCount, string $filePath)
        : void
        {
            try {
                if (!empty($branchData['code'])) {
                    Branch::updateOrCreate(
                        ['code' => $branchData['code']],
                        $branchData
                    );
                    $this->processedCount++;
                }
            } catch (Exception $e) {
                $this->errorCount++;
                Log::error("Error processing Company data at row $rowCount in $filePath: " . $e->getMessage());
            }
        }

        private function cleanup(string $tempFilePath)
        : void
        {
            if (file_exists($tempFilePath)) {
                unlink($tempFilePath);
            }
        }

        private function logJobCompletion()
        : void
        {
            Log::info("Company data processing completed. " .
                "Total processed: {$this->processedCount}, Total errors: {$this->errorCount}");
        }
    }