<?php

namespace Modules\Webstatement\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Http\Response;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Carbon\Carbon;
use Modules\Webstatement\Models\AccountBalance;

/**
 * Controller untuk mengelola laporan closing balance
 * Menyediakan form input nomor rekening dan rentang tanggal
 * serta menampilkan data closing balance berdasarkan filter
 */
class LaporanClosingBalanceController extends Controller
{
    /**
     * Menampilkan halaman utama laporan closing balance
     * dengan form filter nomor rekening dan rentang tanggal
     *
     * @return \Illuminate\View\View
     */
    public function index()
    {
        Log::info('Mengakses halaman laporan closing balance');
        
        return view('webstatement::laporan-closing-balance.index');
    }

    /**
     * Mengambil data laporan closing balance berdasarkan filter
     * yang dikirim melalui AJAX untuk datatables
     *
     * @param Request $request
     * @return \Illuminate\Http\JsonResponse
     */
    public function dataForDatatables(Request $request)
    {
        Log::info('Mengambil data untuk datatables laporan closing balance', [
            'filters' => $request->all()
        ]);

        try {
            DB::beginTransaction();

            $query = AccountBalance::query();

            // Filter berdasarkan nomor rekening jika ada
            if ($request->filled('account_number')) {
                $query->where('account_number', 'like', '%' . $request->account_number . '%');
                Log::info('Filter nomor rekening diterapkan', ['account_number' => $request->account_number]);
            }

            // Filter berdasarkan rentang tanggal jika ada
            if ($request->filled('start_date') && $request->filled('end_date')) {
                $startDate = Carbon::parse($request->start_date)->format('Ymd');
                $endDate = Carbon::parse($request->end_date)->format('Ymd');
                
                $query->whereBetween('period', [$startDate, $endDate]);
                Log::info('Filter rentang tanggal diterapkan', [
                    'start_date' => $startDate,
                    'end_date' => $endDate
                ]);
            }

            // Sorting
            $sortColumn = $request->get('sort', 'period');
            $sortDirection = $request->get('direction', 'desc');
            $query->orderBy($sortColumn, $sortDirection);

            // Pagination
            $perPage = $request->get('per_page', 10);
            $page = $request->get('page', 1);
            
            $results = $query->paginate($perPage, ['*'], 'page', $page);

            DB::commit();
            
            Log::info('Data laporan closing balance berhasil diambil', [
                'total' => $results->total(),
                'per_page' => $perPage,
                'current_page' => $page
            ]);

            return response()->json([
                'data' => $results->items(),
                'pagination' => [
                    'current_page' => $results->currentPage(),
                    'last_page' => $results->lastPage(),
                    'per_page' => $results->perPage(),
                    'total' => $results->total(),
                    'from' => $results->firstItem(),
                    'to' => $results->lastItem()
                ]
            ]);

        } catch (\Exception $e) {
            DB::rollback();
            
            Log::error('Error saat mengambil data laporan closing balance', [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return response()->json([
                'error' => 'Terjadi kesalahan saat mengambil data laporan',
                'message' => $e->getMessage()
            ], 500);
        }
    }

    /**
     * Export data laporan closing balance ke format Excel
     *
     * @param Request $request
     * @return \Illuminate\Http\Response
     */
    public function export(Request $request)
    {
        Log::info('Export laporan closing balance dimulai', [
            'filters' => $request->all()
        ]);

        try {
            DB::beginTransaction();

            $query = AccountBalance::query();

            // Terapkan filter yang sama seperti di datatables
            if ($request->filled('account_number')) {
                $query->where('account_number', 'like', '%' . $request->account_number . '%');
            }

            if ($request->filled('start_date') && $request->filled('end_date')) {
                $startDate = Carbon::parse($request->start_date)->format('Ymd');
                $endDate = Carbon::parse($request->end_date)->format('Ymd');
                $query->whereBetween('period', [$startDate, $endDate]);
            }

            $data = $query->orderBy('period', 'desc')->get();

            DB::commit();

            Log::info('Export laporan closing balance berhasil', [
                'total_records' => $data->count()
            ]);

            // Generate CSV content
            $csvContent = "Nomor Rekening,Periode,Saldo Aktual,Saldo Cleared,Tanggal Update\n";
            
            foreach ($data as $item) {
                $csvContent .= sprintf(
                    "%s,%s,%s,%s,%s\n",
                    $item->account_number,
                    $item->period,
                    number_format($item->actual_balance, 2),
                    number_format($item->cleared_balance, 2),
                    $item->updated_at ? $item->updated_at->format('Y-m-d H:i:s') : '-'
                );
            }

            $filename = 'laporan_closing_balance_' . date('Y-m-d_H-i-s') . '.csv';

            return response($csvContent)
                ->header('Content-Type', 'text/csv')
                ->header('Content-Disposition', 'attachment; filename="' . $filename . '"');

        } catch (\Exception $e) {
            DB::rollback();
            
            Log::error('Error saat export laporan closing balance', [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return response()->json([
                'error' => 'Terjadi kesalahan saat export laporan',
                'message' => $e->getMessage()
            ], 500);
        }
    }

    /**
     * Menampilkan detail laporan closing balance untuk periode tertentu
     *
     * @param string $accountNumber
     * @param string $period
     * @return \Illuminate\View\View
     */
    public function show($accountNumber, $period)
    {
        Log::info('Menampilkan detail laporan closing balance', [
            'account_number' => $accountNumber,
            'period' => $period
        ]);

        try {
            DB::beginTransaction();

            $closingBalance = AccountBalance::where('account_number', $accountNumber)
                ->where('period', $period)
                ->firstOrFail();

            DB::commit();

            Log::info('Detail laporan closing balance berhasil diambil', [
                'account_number' => $accountNumber,
                'period' => $period,
                'balance' => $closingBalance->actual_balance
            ]);

            return view('webstatement::laporan-closing-balance.show', [
                'closingBalance' => $closingBalance
            ]);

        } catch (\Exception $e) {
            DB::rollback();
            
            Log::error('Error saat menampilkan detail laporan closing balance', [
                'account_number' => $accountNumber,
                'period' => $period,
                'error' => $e->getMessage()
            ]);

            return redirect()->route('laporan-closing-balance.index')
                ->with('error', 'Data laporan closing balance tidak ditemukan');
        }
    }
}