<?php

namespace App\Http\Controllers;

use App\Models\Project;
use App\Models\ProjectCodingConfig;
use App\Models\ProjectDocumentStatus;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Str;

class ProjectSettingsController extends Controller
{
    public function index(Project $project)
    {
        $this->authorize('update', $project);
        
        //$project->load(['codingConfig', 'documentStatuses']);
        
        return view('project-settings.index', compact('project'));
    }

    public function updateCoding(Request $request, Project $project)
    {
        $this->authorize('update', $project);
        
        $validated = $request->validate([
            'format' => 'required|string|max:255',
            'year_format' => 'required|in:Y,y,Yy,yy,Y-m,Y/m,y-m,y/m',
            'separator' => 'required|string|max:5',
            'sequence_length' => 'required|integer|min:1|max:10',
            'auto_generate' => 'boolean',
            'elements' => 'nullable|array',
            'reset_sequence' => 'boolean',
        ]);

        try {
            DB::beginTransaction();
            
            $codingConfig = $project->codingConfig ?: new ProjectCodingConfig();
            $codingConfig->project_id = $project->id;
            
            $codingConfig->fill([
                'format' => $validated['format'],
                'year_format' => $validated['year_format'],
                'separator' => $validated['separator'],
                'sequence_length' => $validated['sequence_length'],
                'auto_generate' => $validated['auto_generate'] ?? false,
                'elements' => $validated['elements'] ?? [],
            ]);
            
            if ($request->boolean('reset_sequence')) {
                $codingConfig->next_sequence = 1;
            }
            
            $codingConfig->save();
            
            DB::commit();
            
            return redirect()->route('project-settings.index', $project)
                ->with('success', 'Configuración de codificación actualizada correctamente.');
                
        } catch (\Exception $e) {
            DB::rollBack();
            return redirect()->back()
                ->with('error', 'Error al actualizar la configuración: ' . $e->getMessage());
        }
    }

    public function storeStatus(Request $request, Project $project)
    {
        $this->authorize('update', $project);
        
        $validated = $request->validate([
            'name' => 'required|string|max:100',
            'color' => 'required|string|max:7',
            'text_color' => 'nullable|string|max:7',
            'description' => 'nullable|string|max:500',
            'allow_upload' => 'boolean',
            'allow_edit' => 'boolean',
            'allow_delete' => 'boolean',
            'requires_approval' => 'boolean',
            'is_default' => 'boolean',
        ]);

        try {
            DB::beginTransaction();
            
            // Si se marca como default, quitar el default de otros estados
            if ($validated['is_default'] ?? false) {
                $project->documentStatuses()->update(['is_default' => false]);
            }
            
            $status = new ProjectDocumentStatus($validated);
            $status->project_id = $project->id;
            $status->slug = Str::slug($validated['name']);
            
            // Verificar que el slug sea único
            $counter = 1;
            $originalSlug = $status->slug;
            while ($project->documentStatuses()->where('slug', $status->slug)->exists()) {
                $status->slug = $originalSlug . '-' . $counter;
                $counter++;
            }
            
            $status->save();
            
            DB::commit();
            
            return redirect()->route('project-settings.index', $project)
                ->with('success', 'Estado creado correctamente.');
                
        } catch (\Exception $e) {
            DB::rollBack();
            return redirect()->back()
                ->with('error', 'Error al crear el estado: ' . $e->getMessage());
        }
    }

    public function updateStatus(Request $request, Project $project, ProjectDocumentStatus $status)
    {
        $this->authorize('update', $project);
        
        if ($status->project_id !== $project->id) {
            abort(403);
        }
        
        $validated = $request->validate([
            'name' => 'required|string|max:100',
            'color' => 'required|string|max:7',
            'text_color' => 'nullable|string|max:7',
            'description' => 'nullable|string|max:500',
            'allow_upload' => 'boolean',
            'allow_edit' => 'boolean',
            'allow_delete' => 'boolean',
            'requires_approval' => 'boolean',
            'is_default' => 'boolean',
        ]);

        try {
            DB::beginTransaction();
            
            // Si se marca como default, quitar el default de otros estados
            if ($validated['is_default'] ?? false) {
                $project->documentStatuses()
                    ->where('id', '!=', $status->id)
                    ->update(['is_default' => false]);
            }
            
            $status->update($validated);
            
            DB::commit();
            
            return redirect()->route('project-settings.index', $project)
                ->with('success', 'Estado actualizado correctamente.');
                
        } catch (\Exception $e) {
            DB::rollBack();
            return redirect()->back()
                ->with('error', 'Error al actualizar el estado: ' . $e->getMessage());
        }
    }

    public function destroyStatus(Project $project, ProjectDocumentStatus $status)
    {
        $this->authorize('update', $project);
        
        if ($status->project_id !== $project->id) {
            abort(403);
        }
        
        // Verificar que no haya documentos con este estado
        if ($status->documents()->exists()) {
            return redirect()->back()
                ->with('error', 'No se puede eliminar el estado porque hay documentos asociados.');
        }
        
        // Si es el estado por defecto, establecer otro como default
        if ($status->is_default) {
            $newDefault = $project->documentStatuses()
                ->where('id', '!=', $status->id)
                ->first();
                
            if ($newDefault) {
                $newDefault->update(['is_default' => true]);
            }
        }
        
        $status->delete();
        
        return redirect()->route('project-settings.index', $project)
            ->with('success', 'Estado eliminado correctamente.');
    }

    public function reorderStatuses(Request $request, Project $project)
    {
        $this->authorize('update', $project);
        
        $request->validate([
            'order' => 'required|array',
            'order.*' => 'exists:project_document_statuses,id',
        ]);

        try {
            DB::beginTransaction();
            
            foreach ($request->order as $index => $statusId) {
                $status = ProjectDocumentStatus::find($statusId);
                if ($status && $status->project_id === $project->id) {
                    $status->update(['order' => $index + 1]);
                }
            }
            
            DB::commit();
            
            return response()->json(['success' => true]);
            
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json(['error' => $e->getMessage()], 500);
        }
    }
}