<?php

namespace App\Livewire;

use Livewire\Component;
use Livewire\WithFileUploads;
use Livewire\Attributes\Layout;
use App\Models\Project;
use App\Models\Phase;
use App\Models\Layer;
use App\Services\SpatialFileConverter;
use App\Models\Feature;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;

#[Layout('layouts.app')]
class LayerManager extends Component
{
    use WithFileUploads;

    public Project $project;
    public Phase $phase;
    public $layers;
    public $selectedLayer = null;
    public $visibleLayers = [];          // IDs de capas visibles

    public $uploadFile = null;
    public $layerName = '';
    public $layerColor = '#3b82f6';
    public $manualGeojson = null;
    public $drawingMode = false;

    protected $rules = [
        'uploadFile' => 'required|file|mimes:geojson,kmz,kml,shp,dwg,zip|max:51200',
        'layerName' => 'required|string|max:255',
        'layerColor' => 'nullable|string|size:7',
    ];

    public function mount(Project $project, Phase $phase)
    {
        $this->project = $project;
        $this->phase = $phase;
        $this->loadLayers();
        if ($this->phase->project_id !== $this->project->id) {
            abort(404);
        }
        // Por defecto todas visibles
        $this->visibleLayers = $this->layers->pluck('id')->toArray();
        $this->emitInitialLayersData();
    }

    public function loadLayers()
    {
        $this->layers = Layer::with('features')->where('phase_id', $this->phase->id)->latest()->get();
        $this->visibleLayers = array_intersect($this->visibleLayers, $this->layers->pluck('id')->toArray());
    }

    private function emitInitialLayersData()
    {
        $layersData = $this->layers->map(function($layer) {
            // Construir FeatureCollection a partir de los features de esta capa
            $features = $layer->features->map(function($feature) {
                return [
                    'type' => 'Feature',
                    'id' => $feature->id,
                    'geometry' => $feature->geometry,
                    'properties' => [
                        'name' => $feature->name,
                        'progress' => $feature->progress,
                        'responsible' => $feature->responsible,
                        'template_id' => $feature->template_id,
                    ]
                ];
            })->values()->toArray();

            $geojson = [
                'type' => 'FeatureCollection',
                'features' => $features,
                'style' => ['color' => $this->layerColor ?: '#3b82f6']  // Podrías guardar el color en la tabla layers
            ];

            return [
                'id' => $layer->id,
                'geojson' => $geojson,
                'color' => $geojson['style']['color'],
            ];
        });

        $this->dispatch('initialLayersData', [
            'layers' => $layersData,
            'visibleLayers' => $this->visibleLayers,
            'selectedLayerId' => $this->selectedLayer?->id,
        ]);
    }

    public function toggleLayerVisibility($layerId)
    {
        if ($this->selectedLayer && $this->selectedLayer->id == $layerId) {
            session()->flash('info', 'No puedes ocultar la capa que estás editando.');
            return;
        }
        if (in_array($layerId, $this->visibleLayers)) {
            $this->visibleLayers = array_diff($this->visibleLayers, [$layerId]);
        } else {
            $this->visibleLayers[] = $layerId;
        }
        $this->dispatch('visibilityChanged', $this->visibleLayers);
    }

    public function selectLayer($layerId)
    {
        $this->selectedLayer = Layer::with('features')->find($layerId);
        if (!$this->selectedLayer) return;

        if (!in_array($layerId, $this->visibleLayers)) {
            $this->visibleLayers[] = $layerId;
            $this->dispatch('visibilityChanged', $this->visibleLayers);
        }

        // Construir el GeoJSON desde los features de la capa seleccionada
        $features = $this->selectedLayer->features->map(function($feature) {
            return [
                'type' => 'Feature',
                'id' => $feature->id,
                'geometry' => $feature->geometry,
                'properties' => [
                    'name' => $feature->name,
                    'progress' => $feature->progress,
                    'responsible' => $feature->responsible,
                    'template_id' => $feature->template_id,
                ]
            ];
        })->values()->toArray();

        $geojson = [
            'type' => 'FeatureCollection',
            'features' => $features,
            'style' => ['color' => $this->layerColor ?: '#3b82f6']
        ];

        $this->dispatch('layerSelectedForEdit', [
            'layerId' => $layerId,
            'geojson' => $geojson,
            'color' => $geojson['style']['color'],
        ]);
        session()->flash('info', 'Editando capa: ' . $this->selectedLayer->name);
    }

    public function importFile()
    {
        $user = Auth::user();
        if (!$user->can('upload layers') && !$user->hasRole('Admin')) {
            session()->flash('error', 'Sin permisos.');
            return;
        }

        // Validar campos obligatorios y tamaño máximo
        $this->validate([
            'uploadFile' => 'required|file|max:51200',
            'layerName' => 'required|string|max:255',
            'layerColor' => 'nullable|string|size:7',
        ]);

        $extension = strtolower($this->uploadFile->getClientOriginalExtension());
        $mime = $this->uploadFile->getMimeType();

        $allowedExtensions = ['geojson', 'kmz', 'kml', 'shp', 'dwg', 'zip'];
        $allowedMimes = [
            'application/vnd.google-earth.kml+xml',
            'application/vnd.google-earth.kmz',
            'application/zip',
            'application/x-zip-compressed',
            'application/x-shapefile',
            'image/vnd.dwg',
            'application/acad',
            'application/geo+json',
            'text/xml',          // ✅ Aceptar KML con text/xml
            'application/xml',   // ✅ Alternativa
        ];

        if (!in_array($extension, $allowedExtensions) && !in_array($mime, $allowedMimes)) {
            session()->flash('error', 'Tipo de archivo no permitido. Extensiones válidas: ' . implode(', ', $allowedExtensions));
            return;
        }

        $projectDir = "uploads/projects/{$this->project->id}/layers";
        $originalPath = $this->uploadFile->store($projectDir, 'public');
        $geojson = SpatialFileConverter::convertToGeoJson($this->uploadFile);
        
        if (!$geojson) {
            session()->flash('error', 'Conversión fallida. Asegúrate de que el archivo sea válido (KML, GeoJSON, etc.).');
            return;
        }
        
        $geojson['style'] = ['color' => $this->layerColor ?: '#3b82f6'];

        $layer = Layer::create([
            'project_id' => $this->project->id,
            'phase_id' => $this->phase->id,
            'name' => $this->layerName,
            //'geojson_data' => $geojson,
            'original_file' => $originalPath,
            'uploaded_by' => $user->id,
        ]);

        // Crear features a partir del GeoJSON
        if (isset($geojson['features'])) {
            foreach ($geojson['features'] as $featureData) {
                Feature::create([
                    'layer_id' => $layer->id,
                    'name' => $featureData['properties']['name'] ?? null,
                    'geometry' => $featureData['geometry'],
                    'properties' => $featureData['properties'] ?? [],
                    'template_id' => $featureData['properties']['template_id'] ?? null,
                    'progress' => $featureData['properties']['progress'] ?? 0,
                    'responsible' => $featureData['properties']['responsible'] ?? null,
                ]);
            }
        }

        $this->loadLayers();
        $this->visibleLayers[] = $layer->id;
        $this->reset(['uploadFile', 'layerName']);
        $this->emitInitialLayersData();
        session()->flash('message', 'Capa importada correctamente.');
    }

    public function createEmptyLayer()
    {
        $user = Auth::user();
        $layer = Layer::create([
            'project_id' => $this->project->id,
            'phase_id' => $this->phase->id,
            'name' => $this->layerName ?: 'Nueva capa',
            'original_file' => null,
            'uploaded_by' => $user->id,
            // Opcional: guarda el color en una columna 'color' de la tabla layers
        ]);
        $this->loadLayers();
        $this->visibleLayers[] = $layer->id;
        $this->selectLayer($layer->id);
        $this->emitInitialLayersData();
        session()->flash('message', 'Capa vacía creada. Usa el editor para añadir elementos.');
    }

    public function saveManualGeojson($geojsonString)
    {
        if (!$this->selectedLayer) {
            session()->flash('error', 'No hay capa seleccionada.');
            return;
        }
        $geojson = json_decode($geojsonString, true);
        if (json_last_error() !== JSON_ERROR_NONE || !isset($geojson['features'])) {
            session()->flash('error', 'GeoJSON inválido.');
            return;
        }

        // Eliminar todos los features existentes de esta capa
        $this->selectedLayer->features()->delete();

        // Crear nuevos features a partir del GeoJSON
        foreach ($geojson['features'] as $featureData) {
            Feature::create([
                'layer_id' => $this->selectedLayer->id,
                'name' => $featureData['properties']['name'] ?? null,
                'geometry' => $featureData['geometry'],
                'properties' => $featureData['properties'] ?? [],
                'template_id' => $featureData['properties']['template_id'] ?? null,
                'progress' => $featureData['properties']['progress'] ?? 0,
                'responsible' => $featureData['properties']['responsible'] ?? null,
            ]);
        }

        $this->loadLayers();
        $this->selectLayer($this->selectedLayer->id);
        $this->emitInitialLayersData();
        session()->flash('message', 'Capa guardada con ' . count($geojson['features']) . ' elementos.');
    }

    public function deleteLayer($layerId)
    {
        $user = Auth::user();
        if (!$user->can('delete layers') && !$user->hasRole('Admin')) abort(403);
        $layer = Layer::find($layerId);
        if (!$layer) return;
        if ($layer->original_file) Storage::disk('public')->delete($layer->original_file);
        $layer->features()->delete(); // opcional, si no usas cascade
        $layer->delete();
        $this->loadLayers();
        if ($this->selectedLayer && $this->selectedLayer->id == $layerId) {
            $this->selectedLayer = null;
        }
        $this->emitInitialLayersData();
        session()->flash('message', 'Capa eliminada.');
    }

    public function cancelEditing()
    {
        $this->selectedLayer = null;
        $this->dispatch('layerSelectedForEdit', null);
    }

    public function render()
    {
        return view('livewire.layers.layer-manager');
    }
}