<?php

namespace App\Http\Controllers\Repuve;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;
use Notsoweb\ApiResponse\Enums\ApiResponse;
use App\Http\Requests\Repuve\DeviceStoreRequest;
use App\Http\Requests\Repuve\DeviceUpdateRequest;
use App\Models\Device;
use App\Models\DeviceModule;
use Illuminate\Support\Facades\DB;
use Illuminate\Database\Eloquent\ModelNotFoundException;
use Illuminate\Support\Facades\Log;

class DeviceController extends Controller
{
    public function index(Request $request)
    {
        try {
            $devices = Device::query()->with('deviceModules.module', 'deviceModules.user');

            if ($request->filled('serie')) {
                $devices->where('serie', 'LIKE', '%' . $request->input('serie') . '%');
            }

            if ($request->filled('brand')) {
                $devices->where('brand', 'LIKE', '%' . $request->input('brand') . '%');
            }

            return ApiResponse::OK->response([
                'devices' => $devices->paginate(config('app.pagination')),
            ]);
        } catch (\Exception $e) {
            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al obtener la lista de dispositivos.',
                'error' => $e->getMessage(),
            ]);
        }
    }

    public function store(DeviceStoreRequest $request)
    {
        try {
            DB::beginTransaction();

            // Crear el dispositivo
            $device = Device::create([
                'brand' => $request->input('brand'),
                'serie' => $request->input('serie'),
                'mac_address' => $request->input('mac_address'),
                'status' => $request->input('status', true),
            ]);

            // Asignar módulo y usuarios usando el modelo DeviceModule
            $userIds = $request->input('user_id', []);

            if (!empty($userIds)) {
                // Si hay usuarios, crear un registro por cada usuario
                foreach ($userIds as $userId) {
                    DeviceModule::create([
                        'device_id' => $device->id,
                        'module_id' => $request->module_id,
                        'user_id' => $userId,
                        'status' => true,
                    ]);
                }
            } else {
                // Si no hay usuarios, crear solo la relación device-module
                DeviceModule::create([
                    'device_id' => $device->id,
                    'module_id' => $request->module_id,
                    'user_id' => null,
                    'status' => true,
                ]);
            }

            DB::commit();

            $device->load('deviceModules.module');

            return ApiResponse::CREATED->response([
                'message' => 'Dispositivo creado exitosamente.',
                'device' => [
                    'id' => $device->id,
                    'brand' => $device->brand,
                    'serie' => $device->serie,
                    'status' => $device->status,
                    'module' => $device->deviceModules->first()?->module,
                ],
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al crear el dispositivo.',
                'error' => $e->getMessage(),
            ]);
        }
    }

    public function show($id)
    {
        try {
            $device = Device::with('deviceModules.module', 'deviceModules.user')->findOrFail($id);

            return ApiResponse::OK->response([
                'device' => $device,
            ]);
        } catch (ModelNotFoundException $e) {
            return ApiResponse::NOT_FOUND->response([
                'message' => 'Dispositivo no encontrado.',
            ]);
        } catch (\Exception $e) {
            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al obtener el dispositivo.',
                'error' => $e->getMessage(),
            ]);
        }
    }

    public function update(DeviceUpdateRequest $request, $id)
    {
        try {

            DB::beginTransaction();

            $device = Device::findOrFail($id);

            // Validar unicidad solo si los valores cambiaron
            if ($request->filled('serie') && $request->serie !== $device->serie) {
                if (Device::where('serie', $request->serie)->exists()) {
                    DB::rollBack();
                    return ApiResponse::UNPROCESSABLE_CONTENT->response([
                        'serie' => ['El número de serie ya está en uso.'],
                    ]);
                }
            }

            if ($request->filled('mac_address') && $request->mac_address !== $device->mac_address) {
                if (Device::where('mac_address', $request->mac_address)->exists()) {
                    DB::rollBack();
                    return ApiResponse::UNPROCESSABLE_CONTENT->response([
                        'mac_address' => ['La dirección MAC ya está registrada.'],
                    ]);
                }
            }

            $device->update($request->only(['brand', 'serie', 'mac_address', 'status']));

            DeviceModule::where('device_id', $device->id)->delete();

            $userIds = $request->input('user_id', []);

            if (!empty($userIds)) {
                foreach ($userIds as $userId) {
                    DeviceModule::create([
                        'device_id' => $device->id,
                        'module_id' => $request->module_id,
                        'user_id' => $userId,
                        'status' => true,
                    ]);
                }
            } else {
                DeviceModule::create([
                    'device_id' => $device->id,
                    'module_id' => $request->module_id,
                    'user_id' => null,
                    'status' => true,
                ]);
            }

            DB::commit();

            $device->load(['deviceModules.module', 'deviceModules.user']);

            return ApiResponse::OK->response([
                'message' => 'Dispositivo actualizado exitosamente.',
                'device' => [
                    'id' => $device->id,
                    'brand' => $device->brand,
                    'serie' => $device->serie,
                    'mac_address' => $device->mac_address,
                    'status' => $device->status,
                    'module' => $device->deviceModules->first()?->module,
                    'authorized_users' => $device->deviceModules
                    ->filter(fn($dm) => $dm->user !== null)
                    ->map(fn($dm) => [
                        'id' => $dm->user->id,
                        'name' => $dm->user->full_name,
                        'username' => $dm->user->username,
                    ])
                    ->unique('id')
                    ->values(),
                ],
            ]);
        } catch (ModelNotFoundException $e) {
            return ApiResponse::NOT_FOUND->response([
                'message' => 'Dispositivo no encontrado.',
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al actualizar el dispositivo.',
                'error' => $e->getMessage(),
            ]);
        }
    }

    public function destroy($id)
    {
        try {
            DB::beginTransaction();

            $device = Device::findOrFail($id);
            $device->delete();

            DB::commit();

            return ApiResponse::OK->response([
                'message' => 'Dispositivo eliminado exitosamente.',
            ]);
        } catch (ModelNotFoundException $e) {
            DB::rollBack();
            return ApiResponse::NOT_FOUND->response([
                'message' => 'Dispositivo no encontrado.',
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al eliminar el dispositivo.',
                'error' => $e->getMessage(),
            ]);
        }
    }

    /**
     * Cambiar solo el status de un dispositivo
     */
    public function toggleStatus(int $id)
    {
        try {
            $device = Device::findOrFail($id);

            DB::beginTransaction();

            $newStatus = !$device->status;
            $device->update([
                'status' => $newStatus,
            ]);

            DB::commit();

            $device->refresh();

            return ApiResponse::OK->response([
                'message' => $device->status
                    ? 'Dispositivo activado exitosamente'
                    : 'Dispositivo desactivado exitosamente',
                'device' => [
                    'id' => $device->id,
                    'brand' => $device->brand,
                    'serie' => $device->serie,
                    'mac_address' => $device->mac_address,
                    'status' => $device->status ? 'Activo' : 'Inactivo',
                    'updated_at' => $device->updated_at->format('Y-m-d H:i:s'),
                ],
            ]);
        } catch (ModelNotFoundException $e) {
            return ApiResponse::NOT_FOUND->response([
                'message' => 'Dispositivo no encontrado',
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            Log::error('Error al cambiar status del módulo: ' . $e->getMessage(), [
                'module_id' => $id,
                'trace' => $e->getTraceAsString()
            ]);

            return ApiResponse::INTERNAL_ERROR->response([
                'message' => 'Error al cambiar status del módulo',
                'error' => $e->getMessage(),
            ]);
        }
    }
}