<?php

namespace Modules\Webstatement\Jobs;

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

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

    /**
     * Konstanta untuk konfigurasi batch processing
     */
    private const BATCH_SIZE = 100;
    private const MAX_EXECUTION_TIME = 7200; // 2 jam dalam detik
    private const DELAY_BETWEEN_JOBS = 2; // 2 detik delay antar job
    private const MAX_DELAY_SPREAD = 300; // Spread maksimal 5 menit

    /**
     * ID log sinkronisasi
     *
     * @var int
     */
    protected $syncLogId;

    /**
     * Model log sinkronisasi
     *
     * @var KartuSyncLog
     */
    protected $syncLog;

    /**
     * Batch size untuk processing
     *
     * @var int
     */
    protected $batchSize;

    /**
     * Filter kondisi kartu yang akan diupdate
     *
     * @var array
     */
    protected $filters;

    /**
     * Create a new job instance.
     *
     * @param int|null $syncLogId ID log sinkronisasi
     * @param int $batchSize Ukuran batch untuk processing
     * @param array $filters Filter kondisi kartu
     */
    public function __construct(?int $syncLogId = null, int $batchSize = self::BATCH_SIZE, array $filters = [])
    {
        $this->syncLogId = $syncLogId;
        $this->batchSize = $batchSize > 0 ? $batchSize : self::BATCH_SIZE;
        $this->filters = $filters;
    }

    /**
     * Execute the job untuk update seluruh kartu ATM
     *
     * @return void
     * @throws Exception
     */
    public function handle(): void
    {
        set_time_limit(self::MAX_EXECUTION_TIME);

        Log::info('Memulai job update seluruh kartu ATM', [
            'sync_log_id' => $this->syncLogId,
            'batch_size' => $this->batchSize,
            'filters' => $this->filters
        ]);

        try {
            DB::beginTransaction();

            // Load atau buat log sinkronisasi
            $this->loadOrCreateSyncLog();

            // Update status job dimulai
            $this->updateJobStartStatus();

            // Ambil total kartu yang akan diproses
            $totalCards = $this->getTotalCardsCount();

            if ($totalCards === 0) {
                Log::info('Tidak ada kartu ATM yang perlu diupdate');
                $this->updateJobCompletedStatus(0, 0);
                DB::commit();
                return;
            }

            Log::info("Ditemukan {$totalCards} kartu ATM yang akan diproses");

            // Proses kartu dalam batch
            $processedCount = $this->processCardsInBatches($totalCards);

            // Update status job selesai
            $this->updateJobCompletedStatus($totalCards, $processedCount);

            Log::info('Job update seluruh kartu ATM selesai', [
                'total_cards' => $totalCards,
                'processed_count' => $processedCount,
                'sync_log_id' => $this->syncLog->id
            ]);

            DB::commit();

        } catch (Exception $e) {
            DB::rollBack();

            $this->updateJobFailedStatus($e->getMessage());

            Log::error('Gagal menjalankan job update seluruh kartu ATM: ' . $e->getMessage(), [
                'file' => $e->getFile(),
                'line' => $e->getLine(),
                'sync_log_id' => $this->syncLogId,
                'trace' => $e->getTraceAsString()
            ]);

            throw $e;
        }
    }

    /**
     * Load atau buat log sinkronisasi baru
     *
     * @return void
     * @throws Exception
     */
    private function loadOrCreateSyncLog(): void
    {
        Log::info('Loading atau membuat sync log', ['sync_log_id' => $this->syncLogId]);

        if ($this->syncLogId) {
            $this->syncLog = KartuSyncLog::find($this->syncLogId);
            if (!$this->syncLog) {
                throw new Exception("Sync log dengan ID {$this->syncLogId} tidak ditemukan");
            }
        } else {
            // Buat log sinkronisasi baru
            $this->syncLog = KartuSyncLog::create([
                'periode' => now()->format('Y-m'),
                'sync_notes' => 'Batch update seluruh kartu ATM dimulai',
                'is_sync' => false,
                'sync_at' => null,
                'is_csv' => false,
                'csv_at' => null,
                'is_ftp' => false,
                'ftp_at' => null
            ]);
        }

        Log::info('Sync log berhasil dimuat/dibuat', ['sync_log_id' => $this->syncLog->id]);
    }

    /**
     * Update status saat job dimulai
     *
     * @return void
     */
    private function updateJobStartStatus(): void
    {
        Log::info('Memperbarui status job dimulai');

        $this->syncLog->update([
            'sync_notes' => $this->syncLog->sync_notes . "\nBatch update seluruh kartu ATM dimulai pada " . now()->format('Y-m-d H:i:s'),
            'is_sync' => false,
            'sync_at' => null
        ]);
    }

    /**
     * Ambil total jumlah kartu yang akan diproses
     *
     * @return int
     */
    private function getTotalCardsCount(): int
    {
        Log::info('Menghitung total kartu yang akan diproses', ['filters' => $this->filters]);

        $query = $this->buildCardQuery();
        $count = $query->count();

        Log::info("Total kartu ditemukan: {$count}");
        return $count;
    }

    /**
     * Build query untuk mengambil kartu berdasarkan filter
     *
     * @return \Illuminate\Database\Eloquent\Builder
     */
    private function buildCardQuery()
    {
        $query = Atmcard::where('crsts', 1) // Kartu aktif
                        ->whereNotNull('accflag')
                        ->where('accflag', '!=', '');

        // Terapkan filter default untuk kartu yang perlu update branch/currency
        if (empty($this->filters) || !isset($this->filters['skip_branch_currency_filter'])) {
            $query->where(function ($q) {
                $q->whereNull('branch')
                  ->orWhere('branch', '')
                  ->orWhereNull('currency')
                  ->orWhere('currency', '');
            });
        }

        // Terapkan filter tambahan jika ada
        if (!empty($this->filters)) {
            foreach ($this->filters as $field => $value) {
                if ($field === 'skip_branch_currency_filter') {
                    continue;
                }

                if (is_array($value)) {
                    $query->whereIn($field, $value);
                } else {
                    $query->where($field, $value);
                }
            }
        }

        return $query;
    }

    /**
     * Proses kartu dalam batch
     *
     * @param int $totalCards
     * @return int Jumlah kartu yang berhasil diproses
     */
    private function processCardsInBatches(int $totalCards): int
    {
        Log::info('Memulai pemrosesan kartu dalam batch', [
            'total_cards' => $totalCards,
            'batch_size' => $this->batchSize
        ]);

        $processedCount = 0;
        $batchNumber = 1;
        $totalBatches = ceil($totalCards / $this->batchSize);

        // Proses kartu dalam chunk/batch
        $this->buildCardQuery()->chunk($this->batchSize, function ($cards) use (&$processedCount, &$batchNumber, $totalBatches, $totalCards) {
            Log::info("Memproses batch {$batchNumber}/{$totalBatches}", [
                'cards_in_batch' => $cards->count(),
                'processed_so_far' => $processedCount
            ]);

            try {
                // Dispatch job untuk setiap kartu dalam batch dengan delay
                foreach ($cards as $index => $card) {
                    // Hitung delay berdasarkan nomor batch dan index untuk menyebar eksekusi job
                    $delay = (($batchNumber - 1) * $this->batchSize + $index) % self::MAX_DELAY_SPREAD;
                    $delay += self::DELAY_BETWEEN_JOBS; // Tambah delay minimum

                    // Dispatch job UpdateAtmCardBranchCurrencyJob
                    UpdateAtmCardBranchCurrencyJob::dispatch($card, $this->syncLog->id)
                                                  ->delay(now()->addSeconds($delay))
                                                  ->onQueue('default');

                    $processedCount++;
                }

                // Update progress di log setiap 10 batch
                if ($batchNumber % 10 === 0) {
                    $this->updateProgressStatus($processedCount, $totalCards, $batchNumber, $totalBatches);
                }

                Log::info("Batch {$batchNumber} berhasil dijadwalkan", [
                    'cards_scheduled' => $cards->count(),
                    'total_processed' => $processedCount
                ]);

            } catch (Exception $e) {
                Log::error("Error saat memproses batch {$batchNumber}: " . $e->getMessage(), [
                    'batch_number' => $batchNumber,
                    'cards_count' => $cards->count(),
                    'error' => $e->getMessage()
                ]);
                throw $e;
            }

            $batchNumber++;
        });

        Log::info('Selesai memproses semua batch', [
            'total_processed' => $processedCount,
            'total_batches' => $batchNumber - 1
        ]);

        return $processedCount;
    }

    /**
     * Update status progress pemrosesan
     *
     * @param int $processedCount
     * @param int $totalCards
     * @param int $batchNumber
     * @param int $totalBatches
     * @return void
     */
    private function updateProgressStatus(int $processedCount, int $totalCards, int $batchNumber, int $totalBatches): void
    {
        Log::info('Memperbarui status progress', [
            'processed' => $processedCount,
            'total' => $totalCards,
            'batch' => $batchNumber,
            'total_batches' => $totalBatches
        ]);

        $percentage = round(($processedCount / $totalCards) * 100, 2);
        $progressNote = "\nProgress: {$processedCount}/{$totalCards} kartu dijadwalkan ({$percentage}%) - Batch {$batchNumber}/{$totalBatches}";

        $this->syncLog->update([
            'sync_notes' => $this->syncLog->sync_notes . $progressNote
        ]);
    }

    /**
     * Update status saat job selesai
     *
     * @param int $totalCards
     * @param int $processedCount
     * @return void
     */
    private function updateJobCompletedStatus(int $totalCards, int $processedCount): void
    {
        Log::info('Memperbarui status job selesai', [
            'total_cards' => $totalCards,
            'processed_count' => $processedCount
        ]);

        $completionNote = "\nBatch update selesai pada " . now()->format('Y-m-d H:i:s') .
                         " - Total {$processedCount} kartu dari {$totalCards} berhasil dijadwalkan untuk update";

        $this->syncLog->update([
            'is_sync' => true,
            'sync_at' => now(),
            'sync_notes' => $this->syncLog->sync_notes . $completionNote
        ]);
    }

    /**
     * Update status saat job gagal
     *
     * @param string $errorMessage
     * @return void
     */
    private function updateJobFailedStatus(string $errorMessage): void
    {
        Log::error('Memperbarui status job gagal', ['error' => $errorMessage]);

        if ($this->syncLog) {
            $failureNote = "\nBatch update gagal pada " . now()->format('Y-m-d H:i:s') .
                          " - Error: {$errorMessage}";

            $this->syncLog->update([
                'is_sync' => false,
                'sync_notes' => $this->syncLog->sync_notes . $failureNote
            ]);
        }
    }
}