<?php

namespace App\Http\Controllers\Transactions;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Precheck;
use App\Models\Transaction;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\Log;

class PrechecksController extends Controller
{
    public function index(Transaction $transaction)
    {
        $acConditions = Precheck::getAcConditionOptions();
        $blowerConditions = Precheck::getBlowerConditionOptions();
        $evaporatorConditions = Precheck::getEvaporatorConditionOptions();
        $compressorConditions = Precheck::getCompressorConditionOptions();
        
        return view('transaction.prechecks', compact(
            'transaction', 
            'acConditions', 
            'blowerConditions', 
            'evaporatorConditions', 
            'compressorConditions'
        ));
    }

    public function store(Request $request, Transaction $transaction)
    {
        $request->validate([
            'kilometer' => 'required|numeric|min:0',
            'pressure_high' => 'required|numeric|min:0',
            'pressure_low' => 'nullable|numeric|min:0',
            'cabin_temperature' => 'nullable|numeric',
            'cabin_temperature_image' => 'nullable|image|mimes:jpeg,png,jpg|max:2048',
            'ac_condition' => 'nullable|in:' . implode(',', Precheck::getAcConditionOptions()),
            'ac_image' => 'nullable|image|mimes:jpeg,png,jpg|max:2048',
            'blower_condition' => 'nullable|in:' . implode(',', Precheck::getBlowerConditionOptions()),
            'blower_image' => 'nullable|image|mimes:jpeg,png,jpg|max:2048',
            'evaporator_condition' => 'nullable|in:' . implode(',', Precheck::getEvaporatorConditionOptions()),
            'evaporator_image' => 'nullable|image|mimes:jpeg,png,jpg|max:2048',
            'compressor_condition' => 'nullable|in:' . implode(',', Precheck::getCompressorConditionOptions()),
            'precheck_notes' => 'nullable|string',
            'front_image' => 'required|image|mimes:jpeg,png,jpg|max:2048',
        ]);

        $data = [
            'transaction_id' => $transaction->id,
            'precheck_by' => auth()->id(),
            'precheck_at' => now(),
            'police_number' => $transaction->police_number,
            'spk_number' => $transaction->spk,
            'kilometer' => $request->kilometer,
            'pressure_high' => $request->pressure_high,
            'pressure_low' => $request->pressure_low,
            'cabin_temperature' => $request->cabin_temperature,
            'ac_condition' => $request->ac_condition,
            'blower_condition' => $request->blower_condition,
            'evaporator_condition' => $request->evaporator_condition,
            'compressor_condition' => $request->compressor_condition,
            'precheck_notes' => $request->precheck_notes,
        ];

        // Handle file uploads
        $imageFields = [
            'front_image', 'cabin_temperature_image', 'ac_image', 
            'blower_image', 'evaporator_image'
        ];

        foreach ($imageFields as $field) {
            if ($request->hasFile($field) && $request->file($field)->isValid()) {
                try {
                    $file = $request->file($field);
                    
                    // Generate unique filename
                    $filename = time() . '_' . uniqid() . '_' . $field . '.' . $file->getClientOriginalExtension();
                    
                    // Create directory path
                    $directory = 'prechecks/' . date('Y/m');
                    
                    // Ensure base storage directory exists
                    $this->ensureStorageDirectoryExists();
                    
                    // Ensure prechecks directory exists
                    if (!Storage::disk('public')->exists('prechecks')) {
                        Storage::disk('public')->makeDirectory('prechecks', 0755, true);
                        Log::info('Created prechecks directory');
                    }
                    
                    // Ensure year directory exists
                    $yearDir = 'prechecks/' . date('Y');
                    if (!Storage::disk('public')->exists($yearDir)) {
                        Storage::disk('public')->makeDirectory($yearDir, 0755, true);
                        Log::info('Created year directory: ' . $yearDir);
                    }
                    
                    // Ensure month directory exists
                    if (!Storage::disk('public')->exists($directory)) {
                        Storage::disk('public')->makeDirectory($directory, 0755, true);
                        Log::info('Created month directory: ' . $directory);
                    }
                    
                    // Store file in organized directory structure
                    $path = $file->storeAs($directory, $filename, 'public');
                    
                    // Store file path
                    $data[$field] = $path;
                    
                    // Store metadata
                    $data[$field . '_metadata'] = [
                        'original_name' => $file->getClientOriginalName(),
                        'size' => $file->getSize(),
                        'mime_type' => $file->getMimeType(),
                        'uploaded_at' => now()->toISOString(),
                    ];
                    
                    Log::info('File uploaded successfully: ' . $path);
                    
                } catch (\Exception $e) {
                    // Log error for debugging
                    Log::error('File upload failed: ' . $e->getMessage(), [
                        'field' => $field,
                        'file' => $file->getClientOriginalName(),
                        'error' => $e->getMessage(),
                        'trace' => $e->getTraceAsString()
                    ]);
                    
                    return back()->withErrors(['error' => 'Gagal mengupload file: ' . $field . '. Error: ' . $e->getMessage()]);
                }
            }
        }

        try {
            Precheck::create($data);
            return redirect()->route('transaction')->with('success', 'Precheck berhasil disimpan');
        } catch (\Exception $e) {
            Log::error('Precheck creation failed: ' . $e->getMessage());
            return back()->withErrors(['error' => 'Gagal menyimpan data precheck. Silakan coba lagi.']);
        }
    }

    /**
     * Ensure the base storage directory exists
     */
    private function ensureStorageDirectoryExists()
    {
        $storagePath = storage_path('app/public');
        
        if (!is_dir($storagePath)) {
            if (!mkdir($storagePath, 0755, true)) {
                Log::error('Failed to create storage directory: ' . $storagePath);
                throw new \Exception('Cannot create storage directory: ' . $storagePath . '. Please run: php fix_permissions.php or manually create the directory.');
            }
            Log::info('Created storage directory: ' . $storagePath);
        }
        
        // Check if directory is writable
        if (!is_writable($storagePath)) {
            Log::error('Storage directory is not writable: ' . $storagePath);
            throw new \Exception(
                'Storage directory is not writable: ' . $storagePath . '. ' .
                'Please run one of these commands from your project root: ' .
                '1) php fix_permissions.php ' .
                '2) chmod -R 775 storage/ ' .
                '3) mkdir -p storage/app/public/prechecks/' . date('Y/m')
            );
        }
        
        // Check if we can create subdirectories
        $testDir = $storagePath . '/test_' . time();
        if (!mkdir($testDir, 0755, true)) {
            Log::error('Cannot create subdirectories in storage: ' . $storagePath);
            throw new \Exception(
                'Cannot create subdirectories in storage. ' .
                'Please check permissions and run: php fix_permissions.php'
            );
        }
        
        // Clean up test directory
        rmdir($testDir);
        Log::info('Storage directory is properly configured: ' . $storagePath);
    }
}