<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\Attachment;
use App\Models\Setting;
use App\Services\ActivityLogger;
use App\Support\EntityResolver;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Gate;
use Illuminate\Support\Facades\Storage;

class AttachmentController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $validated = $request->validate(['entity_type' => 'required|in:lead,company,deal', 'entity_id' => 'required|integer']);
        $model = EntityResolver::authorize($validated['entity_type'], $validated['entity_id']);

        return response()->json(['data' => $model->attachments()->with('uploader:id,name')->latest()->get()]);
    }

    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'entity_type' => 'required|in:lead,company,deal',
            'entity_id' => 'required|integer',
            'file' => 'required|file|mimes:'.$this->allowedMimes().'|max:'.($this->maxFileMb() * 1024),
        ], [
            'file.mimes' => 'نوع فایل پیوست مجاز نیست.',
            'file.max' => 'حجم فایل پیوست بیش از حد مجاز است.',
        ]);
        $model = EntityResolver::authorize($validated['entity_type'], $validated['entity_id'], 'update');
        $file = $request->file('file');
        $path = $file->store('attachments');

        $attachment = $model->attachments()->create([
            'uploaded_by' => auth()->id(),
            'original_name' => $file->getClientOriginalName(),
            'path' => $path,
            'mime_type' => $file->getMimeType() ?: 'application/octet-stream',
            'size' => $file->getSize(),
        ]);

        ActivityLogger::log('attachment_uploaded', "File {$attachment->original_name} uploaded", $model);

        return response()->json($attachment->load('uploader:id,name'), 201);
    }

    public function download(Attachment $attachment)
    {
        Gate::authorize('view', $attachment);
        ActivityLogger::log('attachment_downloaded', "File {$attachment->original_name} downloaded", $attachment->attachable);

        return Storage::download($attachment->path, $attachment->original_name);
    }

    public function destroy(Attachment $attachment): JsonResponse
    {
        Gate::authorize('delete', $attachment);
        Storage::delete($attachment->path);
        $attachment->delete();
        ActivityLogger::log('attachment_deleted', "File {$attachment->id} deleted");

        return response()->json(['message' => 'فایل حذف شد']);
    }

    private function allowedMimes(): string
    {
        return Setting::where('key', 'attachment_allowed_file_types')->value('value')
            ?: 'pdf,jpg,jpeg,png,doc,docx,xls,xlsx,txt';
    }

    private function maxFileMb(): int
    {
        return max(1, (int) (Setting::where('key', 'attachment_max_file_size_mb')->value('value') ?: 10));
    }
}