<?php

namespace App\Http\Controllers;

use App\Models\File;
use App\Models\Project;
use App\Rules\MaxBound;
use App\Models\Business;
use Illuminate\Support\Str;
use Illuminate\Http\Request;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Auth;
use App\HiLib\Resources\FileResource;
use Spatie\QueryBuilder\QueryBuilder;
use Spatie\QueryBuilder\AllowedFilter;
use Illuminate\Support\Facades\Storage;

class FileController extends Controller
{
    public function index(int $business, Request $request)
    {
        permit('businessAccess');

        $this->indexValidation($request);

        $per_page = $request->limit > 100 ? 10 : $request->limit;

        return $this->indexFiltering($business)->paginate($per_page);
    }

    public function indexValidation($request)
    {
        $bound = 10;
        $this->validate($request, [
            'filter.project_id' => [new MaxBound($bound)] ,
            'filter.user_id' => [new MaxBound($bound)] ,
        ]);
    }

    public function indexFiltering($business)
    {
        $query = File::where('business_id', $business);
        $fileQ = QueryBuilder::for($query)
            ->allowedFilters([
                AllowedFilter::exact('user_id'),
                AllowedFilter::exact('project_id'),
                AllowedFilter::exact('extension'),
            ]);
        if (\request('_business_info')['info']['users'][\auth()->id()]['level'] != enum('levels.owner.id')) {
            $requested_projects = isset(\request('filter')['project_id']) ?
                array_unique(explode(',',\request('filter')['project_id'] ?? null )) :
                null;
            $requested_projects = collect($requested_projects)->keyBy(null)->toArray();
            $project_ids = $this->myStateProjects($requested_projects);
            $fileQ->where(function ($q) use ($project_ids) {
                $q->whereIn('project_id', $project_ids['non_guest_ids'])
                    ->orWhere(function ($q) use ($project_ids) {
                        $q->whereIn('project_id', $project_ids['guest_ids'])
                            ->where('user_id', auth()->id());
                    });
            });
        }

        if (request()->filled('group')) {
            $fileQ->selectRaw("files.group, count(files.id) as file_count, sum(files.size) as file_size")->groupBy('group');
        }

        return $fileQ;
    }

    public function myStateProjects($requested_projects)
    {
        $non_guest_ids = [];
        $guest_ids = [];
        $is_empty = empty($requested_projects);

        foreach (\request('_business_info')['info']['projects'] as $p_id => $p) {

            $level = \request('_business_info')['info']['projects'][$p_id]['members'][\auth()->id()]['level'];

            if (( $is_empty || isset($requested_projects[$p_id]))
                && $level > enum('levels.guest.id')) {
                array_push($non_guest_ids, $p_id);
            }
            if (( $is_empty || isset($requested_projects[$p_id]))
                && $level == enum('levels.guest.id')) {
                array_push($guest_ids, $p_id);
            }
        }

        return ['non_guest_ids' => $non_guest_ids, 'guest_ids' => $guest_ids];
    }

    public function store(Request $request, int $business, int $project)
    {
        // different size and different validation
        // validate
        // validate the wallet is not so much in debt
        // create record in the db
        // put file in s3
        // return file resource
        $business = Business::findOrFail($business);
        $project = Project::findOrFail($project);

        $this->validate($request, ['file' => 'required|file',]);

        $file = $request->file('file');
        $file_extension = $file->getClientOriginalExtension();
        $file_name = Str::random(40).'.'.$file_extension;
        $file->storeAs(
            $business->id.\DIRECTORY_SEPARATOR.$project->id,
            $file_name,
            's3'
        );

        $file_record = File::create([
            'user_id' => Auth::id(),
            'business_id' => $business->id,
            'project_id' => $project->id,
            'disk' => 's3', // default disk
            'original_name' => $file->getClientOriginalName(),
            'extension' => $file_extension,
            'name' => $file_name,
            'mime' => $file->getClientMimeType(),
            'group' => $this->groupDetection($file),
            'size' => $file->getSize(),
            'description' => $request->description
        ]);

        return new FileResource($file_record);
    }

    public function groupDetection(UploadedFile $file)
    {
        // Media files like mp4, mp3, wma and png or jpeg
        [$type, $subtype] = Str::of($file->getMimeType())->explode("/",2)->pad(2, null);

        if (in_array($type, ['audio', 'video', 'image'])) {
            return $type;
        }

        // Covert string to \Illuminate\Support\Stringable object
        $subtype = Str::of($subtype);

        // PDF files
        if ($subtype->contains(["pdf"])) {
            return "pdf";
        }

        // Compressed files like zip, cab, rar, etc.
        if ($subtype->contains(['compressed']) || in_array($file->getClientOriginalExtension(), ['zip', 'rar','7z','cab'])) {
            return "compressed";
        }

        // Office files like xls, xlsx, doc, docx, etc.
        if ($subtype->contains(['vnd.ms', 'vnd.sealed', 'officedocument', 'opendocument'])) {
            return "office";
        }

        // Non of the above files
        return "other";
    }

    public function download(int $business, int $project, int $file)
    {
        // requested file belongs to this project and this business
        // check permisson
        // create perma link or temp link
        // return the file resource or stream it
        return File::findOrFail($file)->getTemporaryLink();
    }

    public function rename(Request $request, int $business, int $project, int $file)
    {
        // requested file belongs to this project and this business
        // check permisson
        // update original name
        // return the file resource
        // sanitize the name for slashs and back slashes
        $this->validate($request, [
            'name' => 'required|string'
        ]);

        $file = File::findOrFail($file);

        $file->update(['original_name' => $request->name.".".$file->extension]);

        return new FileResource($file);
    }


    public function delete(Request $request, int $business, int $project, int $file)
    {
        // requested file belongs to this project and this business
        // check permisson
        // check it's relations
        // delete the file form File table
        // delete file from s3
        $file = File::findOrFail($file);
        Storage::disk('s3')->delete($file->getPath());
        return $file->delete();
    }
}