<?php

namespace App\Http\Controllers;

use App\Models\Document;
use App\Models\Project;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Storage;

class DocumentController extends Controller
{
    /**
     * Display a listing of documents.
     */
    public function index(Request $request)
    {
        $query = Document::with(['project', 'uploader']);

        if ($request->filled('project_id')) {
            $query->where('project_id', $request->project_id);
        }

        if ($request->filled('file_type')) {
            $query->where('file_type', $request->file_type);
        }

        if ($request->filled('search')) {
            $query->search($request->search);
        }

        $documents = $query->orderBy('created_at', 'desc')
            ->paginate(20)
            ->appends($request->query());

        $projects = Project::all();
        $fileTypes = ['pdf', 'image', 'word', 'excel', 'text', 'other'];

        return view('documents.index', compact('documents', 'projects', 'fileTypes'));
    }

    /**
     * Show the form for creating a new document.
     */
    public function create()
    {
        $projects = Project::all();
        $document = null;

        return view('documents.form', compact('projects', 'document'));
    }

    /**
     * Store a newly created document in storage.
     */
    public function store(Request $request)
    {
        $validated = $request->validate([
            'title' => 'required|string|max:255',
            'description' => 'nullable|string',
            'project_id' => 'nullable|exists:projects,id',
            'file' => 'required|file|max:20480',
        ]);

        $file = $request->file('file');
        $path = $file->store('documents', 'public');

        $extension = strtolower($file->getClientOriginalExtension());
        $fileType = match(true) {
            $extension === 'pdf' => 'pdf',
            in_array($extension, ['jpg', 'jpeg', 'png', 'gif', 'svg', 'webp']) => 'image',
            in_array($extension, ['doc', 'docx']) => 'word',
            in_array($extension, ['xls', 'xlsx', 'csv']) => 'excel',
            in_array($extension, ['txt', 'rtf']) => 'text',
            default => 'other',
        };

        Document::create([
            'tenant_id' => $this->getTenantId(),
            'project_id' => $validated['project_id'] ?? null,
            'title' => $validated['title'],
            'description' => $validated['description'] ?? null,
            'file_path' => $path,
            'file_type' => $fileType,
            'uploaded_by' => Auth::id(),
        ]);

        return redirect()
            ->route('documents.index')
            ->with('success', __('document.created_successfully'));
    }

    /**
     * Display the specified document.
     */
    public function show(Document $document)
    {
        $document->load(['project', 'uploader']);

        return view('documents.show', compact('document'));
    }

    /**
     * Show the form for editing the specified document.
     */
    public function edit(Document $document)
    {
        $projects = Project::all();

        return view('documents.form', compact('document', 'projects'));
    }

    /**
     * Update the specified document in storage.
     */
    public function update(Request $request, Document $document)
    {
        $validated = $request->validate([
            'title' => 'required|string|max:255',
            'description' => 'nullable|string',
            'project_id' => 'nullable|exists:projects,id',
            'file' => 'nullable|file|max:20480',
        ]);

        if ($request->hasFile('file')) {
            // Delete old file
            Storage::disk('public')->delete($document->file_path);

            $file = $request->file('file');
            $path = $file->store('documents', 'public');

            $extension = strtolower($file->getClientOriginalExtension());
            $fileType = match(true) {
                $extension === 'pdf' => 'pdf',
                in_array($extension, ['jpg', 'jpeg', 'png', 'gif', 'svg', 'webp']) => 'image',
                in_array($extension, ['doc', 'docx']) => 'word',
                in_array($extension, ['xls', 'xlsx', 'csv']) => 'excel',
                in_array($extension, ['txt', 'rtf']) => 'text',
                default => 'other',
            };

            $validated['file_path'] = $path;
            $validated['file_type'] = $fileType;
        }

        $document->update($validated);

        return redirect()
            ->route('documents.index')
            ->with('success', __('document.updated_successfully'));
    }

    /**
     * Remove the specified document from storage.
     */
    public function destroy(Document $document)
    {
        Storage::disk('public')->delete($document->file_path);
        $document->delete();

        return redirect()
            ->route('documents.index')
            ->with('success', __('document.deleted_successfully'));
    }

    /**
     * Download the specified document.
     */
    public function download(Document $document)
    {
        if (!Storage::disk('public')->exists($document->file_path)) {
            abort(404, __('document.file_not_found'));
        }

        return Storage::disk('public')->download($document->file_path, $document->title . '.' . pathinfo($document->file_path, PATHINFO_EXTENSION));
    }
}