<?php

namespace App\Http\Controllers\Admin;

use App\Constants\Status;
use App\Http\Controllers\Controller;
use App\Models\Frontend;
use Illuminate\Http\Request;
use App\Models\Language;
use Illuminate\Support\Facades\File;
use Illuminate\Pagination\LengthAwarePaginator;


class LanguageController extends Controller
{

    public function langManage($lang = false)
    {
        $pageTitle = 'Language Manager';
        $languages = Language::orderBy('is_default', 'desc')->get();
        return view('admin.language.lang', compact('pageTitle', 'languages'));
    }

    public function langStore(Request $request)
    {
        $request->validate([
            'name' => 'required|string|max:40',
            'code' => 'required|string|max:40|unique:languages'
        ]);



        $data = file_get_contents(resource_path('lang/') . 'en.json');
        $json_file = strtolower($request->code) . '.json';
        $path = resource_path('lang/') . $json_file;

        File::put($path, $data);


        $language = new  Language();

        if ($request->is_default) {
            $lang = $language->where('is_default', Status::YES)->first();
            if ($lang) {
                $lang->is_default = Status::NO;
                $lang->save();
            }
        }
        $language->name = $request->name;
        $language->code = strtolower($request->code);
        $language->is_default = $request->is_default ? Status::YES : Status::NO;
        $language->save();

        $notify[] = ['success', 'Language added successfully'];
        return back()->withNotify($notify);
    }

    public function langUpdate(Request $request, $id)
    {
        $request->validate([
            'name' => 'required',
        ]);

        $language = Language::findOrFail($id);

        if (!$request->is_default) {
            $defaultLang = Language::where('is_default', Status::YES)->where('id', '!=', $id)->exists();
            if (!$defaultLang) {
                $notify[] = ['error', 'You\'ve to set another language as default before unset this'];
                return back()->withNotify($notify);
            }
        }

        $language->name = $request->name;
        $language->is_default = $request->is_default ? Status::YES : Status::NO;
        $language->save();

        if ($request->is_default) {
            $lang = Language::where('is_default', Status::YES)->where('id', '!=', $language->id)->first();
            if ($lang) {
                $lang->is_default = Status::NO;
                $lang->save();
            }
        }

        $notify[] = ['success', 'Update successfully'];
        return back()->withNotify($notify);
    }

    public function langDelete($id)
    {
        $lang = Language::find($id);
        fileManager()->removeFile(resource_path('lang/') . $lang->code . '.json');
        $lang->delete();
        $notify[] = ['success', 'Language deleted successfully'];
        return back()->withNotify($notify);
    }

    public function langEdit($id) {
        $lang = Language::find($id);
        $pageTitle = "Update " . $lang->name . " Keywords";
        $json = file_get_contents(resource_path('lang/') . $lang->code . '.json');
        $list_lang = Language::all();

        if (empty($json)) {
            $notify[] = ['error', 'File not found'];
            return back()->withNotify($notify);
        }

        $json = json_decode($json, true);

        $perPage = getPaginate();
        $currentPage = request()->get('page', 1);
        $offset = ($currentPage - 1) * $perPage;

        $search = request()->search;
        if ($search) {
            $json = array_filter(
                $json,
                function ($key) use ($search) {
                    return stripos($key, $search) !== false;
                },
                ARRAY_FILTER_USE_KEY
            );
        }
        
        $items = array_slice($json, $offset, $perPage, true);

        $json = new LengthAwarePaginator(
            $items,
            count($json),
            $perPage,
            $currentPage,
            ['path' => url()->current()]
        );

        return view('admin.language.edit_lang', compact('pageTitle', 'json', 'lang', 'list_lang'));
    }

    public function langImport(Request $request)
    {
        $tolang = Language::find($request->toLangid);
        if ($request->id != 999) {
            $fromLang = Language::find($request->id);
            $json = file_get_contents(resource_path('lang/') . $fromLang->code . '.json');
            $keywords = json_decode($json, true);
        }else{
            $text = $this->getKeys();
            $keywords = explode("\n",$text);
        }

        $items = file_get_contents(resource_path('lang/') . $tolang->code . '.json');
        foreach ($keywords as $keyword) {
            $keyword = trim($keyword);
            if (!array_key_exists($keyword, json_decode($items, true))) {
                $newArr[$keyword] = $keyword;
            }
        }
        if (isset($newArr)) {
            $itemData = json_decode($items, true);
            $result = array_merge($itemData, $newArr);
            file_put_contents(resource_path('lang/') . $tolang->code . '.json', json_encode($result));
        }

        return 'success';
    }

    public function storeLanguageJson(Request $request, $id)
    {
        $lang = Language::find($id);
        $this->validate($request, [
            'key' => 'required',
            'value' => 'required'
        ]);

        $items = file_get_contents(resource_path('lang/') . $lang->code . '.json');

        $reqKey = trim($request->key);

        if (array_key_exists($reqKey, json_decode($items, true))) {
            $notify[] = ['error', "Key already exist"];
            return back()->withNotify($notify);
        } else {
            $newArr[$reqKey] = trim($request->value);
            $itemData = json_decode($items, true);
            $result = array_merge($itemData, $newArr);
            file_put_contents(resource_path('lang/') . $lang->code . '.json', json_encode($result));
            $notify[] = ['success', "Language key added successfully"];
            return back()->withNotify($notify);
        }
    }
    public function deleteLanguageJson(Request $request, $id)
    {
        $this->validate($request, [
            'key' => 'required',
            'value' => 'required'
        ]);

        $key = $request->key;
        $lang = Language::find($id);
        $data = file_get_contents(resource_path('lang/') . $lang->code . '.json');

        $json_arr = json_decode($data, true);
        unset($json_arr[$key]);

        file_put_contents(resource_path('lang/') . $lang->code . '.json', json_encode($json_arr));
        $notify[] = ['success', "Language key deleted successfully"];
        return back()->withNotify($notify);
    }

    public function updateLanguageJson(Request $request, $id)
    {
        $this->validate($request, [
            'key' => 'required',
            'value' => 'required'
        ]);

        $key = trim($request->key);
        $reqValue = $request->value;
        $lang = Language::find($id);

        $data = file_get_contents(resource_path('lang/') . $lang->code . '.json');

        $json_arr = json_decode($data, true);

        $json_arr[$key] = $reqValue;

        file_put_contents(resource_path('lang/') . $lang->code . '.json', json_encode($json_arr));

        $notify[] = ['success', 'Language key updated successfully'];
        return back()->withNotify($notify);
    }

    public function getKeys()
    {
        $langKeys = [];
        $dirname = resource_path('views');
        foreach ($this->getAllFiles($dirname) as $file) {
            $langKeys = array_merge($langKeys, $this->getLangKeys($file));
        }
        $frontendData = Frontend::where('data_keys', '!=', 'seo.data')->get();
        foreach ($frontendData as $frontend) {
            foreach ($frontend->data_values as $key => $frontendValue) {
                if ($key != 'has_image' && !isImage($frontendValue) && !isHtml($frontendValue)) {
                    $langKeys[] = $frontendValue;
                }
            }
        }
        $langKeys = array_unique($langKeys);
        $keyText ='';
        foreach ($langKeys as $langKey) {
            $keyText .= "$langKey \n";
        }
        return rtrim($keyText,"\n");
        return response()->json($langKeys);
    }


    private function getAllFiles($dir)
    {
        $root = $dir;

        $iter = new \RecursiveIteratorIterator(
            new \RecursiveDirectoryIterator($root, \RecursiveDirectoryIterator::SKIP_DOTS),
            \RecursiveIteratorIterator::SELF_FIRST,
            \RecursiveIteratorIterator::CATCH_GET_CHILD
        );

        $paths = array($root);
        foreach ($iter as $path => $dir) {
            if (!$dir->isDir() && substr($dir, -4) == '.php') {
                $files[] = $path;
            }
        }

        return $files;
    }

    private function getLangKeys($path)
    {
        $code = file_get_contents($path);
        $exp = explode("')", $code);
        $finalcode = '';
        foreach ($exp as $dd) {
            $finalcode .= $dd . "')

            ";
        }
        preg_match_all("/@lang\(\\'(.*)\\'\)/",  $finalcode, $keys);
        return $this->fixMultiIssue($keys[1]);
    }

    private function fixMultiIssue($arr)
    {
        $res = array();
        foreach ($arr as $keys) {
            $exp = explode("')", $keys);
            foreach ($exp as $child) {
                if (!strpos($child, '@lang') && !strpos($child, '}') && !strpos($child, '<') && !strpos($child, '{') && !strpos($child, '>')) {
                    $res[] =  $child;
                }
            }
        }
        return $res;
    }
}
