<?php

namespace Modules\Webstatement\Http\Controllers;

use App\Http\Controllers\Controller;
use Carbon\Carbon;
use Exception;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;
use Illuminate\Validation\Rule;
use Log;
use Modules\Webstatement\Jobs\GenerateAtmTransactionReportJob;
use Modules\Webstatement\Models\AtmTransactionReportLog;

class AtmTransactionReportController extends Controller
{
    /**
     * Display a listing of the ATM transaction reports.
     */
    public function index(Request $request)
    {
        return view('webstatement::atm-reports.index');
    }

    /**
     * Store a newly created ATM transaction report request.
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'report_date' => ['required', 'date_format:Y-m-d'],
        ]);

        // Convert date to Ymd format for period
        $period = Carbon::createFromFormat('Y-m-d', $validated['report_date'])->format('Ymd');

        // Add user tracking data
        $reportData = [
            'period' => $period,
            'report_date' => $validated['report_date'],
            'user_id' => Auth::id(),
            'created_by' => Auth::id(),
            'ip_address' => $request->ip(),
            'user_agent' => $request->userAgent(),
            'status' => 'pending',
        ];

        // Create the report request log
        $reportRequest = AtmTransactionReportLog::create($reportData);

        // Dispatch the job to generate the report
        try {
            GenerateAtmTransactionReportJob::dispatch($period, $reportRequest->id);

            $reportRequest->update([
                'status' => 'processing',
                'updated_by' => Auth::id()
            ]);

        } catch (Exception $e) {
            $reportRequest->update([
                'status' => 'failed',
                'error_message' => $e->getMessage(),
                'updated_by' => Auth::id()
            ]);
        }

        return redirect()->route('atm-reports.index')
                         ->with('success', 'ATM Transaction report request has been created successfully.');
    }

    /**
     * Show the form for creating a new report request.
     */
    public function create()
    {
        return view('webstatement::atm-reports.create', compact('branches'));
    }

    /**
     * Display the specified report request.
     */
    public function show(AtmTransactionReportLog $atmReport)
    {
        $atmReport->load(['user', 'creator', 'authorizer']);
        return view('webstatement::atm-reports.show', compact('atmReport'));
    }

    /**
     * Download the report if available.
     */
    public function download(AtmTransactionReportLog $atmReport)
    {
        // Check if report is available
        if ($atmReport->status !== 'completed' || !$atmReport->file_path) {
            return back()->with('error', 'Report is not available for download.');
        }

        // Update download status
        $atmReport->update([
            'is_downloaded' => true,
            'downloaded_at' => now(),
            'updated_by' => Auth::id()
        ]);

        // Download the file
        $filePath = $atmReport->file_path;
        if (Storage::exists($filePath)) {
            $fileName = "atm_transaction_report_{$atmReport->period}.csv";
            return Storage::download($filePath, $fileName);
        }

        return back()->with('error', 'Report file not found.');
    }

    /**
     * Authorize a report request.
     */
    public function authorize(Request $request, AtmTransactionReportLog $atmReport)
    {
        $request->validate([
            'authorization_status' => ['required', Rule::in(['approved', 'rejected'])],
            'remarks' => ['nullable', 'string', 'max:255'],
        ]);

        // Update authorization status
        $atmReport->update([
            'authorization_status' => $request->authorization_status,
            'authorized_by' => Auth::id(),
            'authorized_at' => now(),
            'remarks' => $request->remarks,
            'updated_by' => Auth::id()
        ]);

        $statusText = $request->authorization_status === 'approved' ? 'approved' : 'rejected';

        return redirect()->route('atm-reports.show', $atmReport->id)
                         ->with('success', "ATM Transaction report request has been {$statusText} successfully.");
    }

    /**
     * Provide data for datatables.
     */
    public function dataForDatatables(Request $request)
    {
        // Retrieve data from the database
        $query = AtmTransactionReportLog::query();

        // Apply search filter if provided
        if ($request->has('search') && !empty($request->get('search'))) {
            $search = $request->get('search');
            $query->where(function ($q) use ($search) {
                $q->where('period', 'LIKE', "%$search%")
                  ->orWhere('status', 'LIKE', "%$search%")
                  ->orWhere('authorization_status', 'LIKE', "%$search%");
            });
        }

        // Apply column filters if provided
        if ($request->has('filters') && !empty($request->get('filters'))) {
            $filters = json_decode($request->get('filters'), true);

            foreach ($filters as $filter) {
                if (!empty($filter['value'])) {
                    if ($filter['column'] === 'status') {
                        $query->where('status', $filter['value']);
                    } else if ($filter['column'] === 'authorization_status') {
                        $query->where('authorization_status', $filter['value']);
                    }
                }
            }
        }

        // Apply sorting if provided
        if ($request->has('sortOrder') && !empty($request->get('sortOrder'))) {
            $order = $request->get('sortOrder');
            $column = $request->get('sortField');

            // Map frontend column names to database column names if needed
            $columnMap = [
                'period' => 'period',
                'status' => 'status',
            ];

            $dbColumn = $columnMap[$column] ?? $column;
            $query->orderBy($dbColumn, $order);
        } else {
            // Default sorting
            $query->latest('created_at');
        }

        // Get the total count of records
        $totalRecords = $query->count();

        // Apply pagination if provided
        if ($request->has('page') && $request->has('size')) {
            $page = $request->get('page');
            $size = $request->get('size');
            $offset = ($page - 1) * $size;

            $query->skip($offset)->take($size);
        }

        // Get the filtered count of records
        $filteredRecords = $query->count();

        // Eager load relationships (remove branch since it's not used anymore)
        $query->with(['user', 'authorizer']);

        // Get the data for the current page
        $data = $query->get()->map(function ($item) {
            $processingHours = $item->status === 'processing' ? $item->updated_at->diffInHours(now()) : 0;
            $isProcessingTimeout = $item->status === 'processing' && $processingHours >= 1;

            return [
                'id' => $item->id,
                'period' => $item->period,
                'report_date' => Carbon::createFromFormat('Ymd', $item->period)->format('Y-m-d'),
                'status' => $item->status,
                'status_display' => $item->status . ($isProcessingTimeout ? ' (Timeout)' : ''),
                'processing_hours' => $processingHours,
                'is_processing_timeout' => $isProcessingTimeout,
                'authorization_status' => $item->authorization_status,
                'is_downloaded' => $item->is_downloaded,
                'created_at' => dateFormat($item->created_at, 1, 1),
                'created_by' => $item->user->name ?? 'N/A',
                'authorized_by' => $item->authorizer ? $item->authorizer->name : null,
                'authorized_at' => $item->authorized_at ? $item->authorized_at->format('Y-m-d H:i:s') : null,
                'file_path' => $item->file_path,
                'can_retry' => in_array($item->status, ['failed', 'pending']) || $isProcessingTimeout || ($item->status === 'completed' && !$item->file_path),
            ];
        });

        // Calculate the page count
        $pageCount = ceil($filteredRecords / ($request->get('size') ?: 1));
        $currentPage = $request->get('page') ?: 1;

        return response()->json([
            'draw' => $request->get('draw'),
            'recordsTotal' => $totalRecords,
            'recordsFiltered' => $filteredRecords,
            'pageCount' => $pageCount,
            'page' => $currentPage,
            'totalCount' => $totalRecords,
            'data' => $data,
        ]);
    }

    /**
     * Delete a report request.
     */
    public function destroy(AtmTransactionReportLog $atmReport)
    {
        // Delete the file if exists
        if ($atmReport->file_path && Storage::exists($atmReport->file_path)) {
            Storage::delete($atmReport->file_path);
        }

        // Delete the report request
        $atmReport->delete();

        return response()->json([
            'message' => 'ATM Transaction report deleted successfully.',
        ]);
    }

    /**
     * Send report to email
     */
    public function sendEmail($id)
    {
        $atmReport = AtmTransactionReportLog::findOrFail($id);

        // Check if report has email
        if (empty($atmReport->email)) {
            return redirect()->back()->with('error', 'No email address provided for this report.');
        }

        // Check if report is available
        if ($atmReport->status !== 'completed' || !$atmReport->file_path) {
            return redirect()->back()->with('error', 'Report is not available for sending.');
        }

        try {
            // Send email with report attachment
            // Implementation depends on your email system
            // Mail::to($atmReport->email)->send(new AtmTransactionReportEmail($atmReport));

            $atmReport->update([
                'email_sent' => true,
                'email_sent_at' => now(),
                'updated_by' => Auth::id()
            ]);

            return redirect()->back()->with('success', 'ATM Transaction report sent to email successfully.');
        } catch (Exception $e) {
            Log::error('Failed to send ATM Transaction report email: ' . $e->getMessage());
            return redirect()->back()->with('error', 'Failed to send email: ' . $e->getMessage());
        }
    }

    /**
     * Retry generating the ATM transaction report
     */
    public function retry(AtmTransactionReportLog $atmReport)
    {
        // Check if retry is allowed (failed, pending, or processing for more than 1 hour)
        $allowedStatuses = ['failed', 'pending'];
        $isProcessingTooLong = $atmReport->status === 'processing' &&
                              $atmReport->updated_at->diffInHours(now()) >= 1;

        if (!in_array($atmReport->status, $allowedStatuses) && !$isProcessingTooLong) {
            return back()->with('error', 'Report can only be retried if status is failed, pending, or processing for more than 1 hour.');
        }

        try {
            // If it was processing for too long, mark it as failed first
            if ($isProcessingTooLong) {
                $atmReport->update([
                    'status' => 'failed',
                    'error_message' => 'Processing timeout - exceeded 1 hour limit',
                    'updated_by' => Auth::id()
                ]);
            }

            // Reset the report status and clear previous data
            $atmReport->update([
                'status' => 'processing',
                'error_message' => null,
                'file_path' => null,
                'file_size' => null,
                'record_count' => null,
                'updated_by' => Auth::id()
            ]);

            // Dispatch the job again
            GenerateAtmTransactionReportJob::dispatch($atmReport->period, $atmReport->id);

            return back()->with('success', 'ATM Transaction report job has been retried successfully.');

        } catch (Exception $e) {
            $atmReport->update([
                'status' => 'failed',
                'error_message' => $e->getMessage(),
                'updated_by' => Auth::id()
            ]);

            return back()->with('error', 'Failed to retry report generation: ' . $e->getMessage());
        }
    }

    /**
     * Check if report can be retried
     */
    public function canRetry(AtmTransactionReportLog $atmReport)
    {
        $allowedStatuses = ['failed', 'pending'];
        $isProcessingTooLong = $atmReport->status === 'processing' &&
                              $atmReport->updated_at->diffInHours(now()) >= 1;

        return in_array($atmReport->status, $allowedStatuses) ||
               $isProcessingTooLong ||
               ($atmReport->status === 'completed' && !$atmReport->file_path);
    }
}