<?php
namespace App\Service;

use App\Entity\Document;
use App\Entity\DocumentCategory;
use App\Repository\DocumentRepository;
use App\Repository\DocumentCategoryRepository;
use App\Service\FileService;

use Doctrine\ORM\EntityManagerInterface;

class DocumentService 
{
    private string $projectDir;

    private EntityManagerInterface $entityManager;

    private FileService $fileService;

    private DocumentRepository $documentRepository;

    private DocumentCategoryRepository $documentCategoryRepository;

    public function __construct(
        string $projectDir,
        EntityManagerInterface $entityManager,
        FileService $fileService,
        DocumentRepository $documentRepository,
        DocumentCategoryRepository $documentCategoryRepository
    )
    {
        $this->projectDir = $projectDir;

        $this->entityManager = $entityManager;

        $this->fileService = $fileService;

        $this->documentRepository = $documentRepository;

        $this->documentCategoryRepository = $documentCategoryRepository;
    }

    public function createDocumentFromData(array $data) : Document 
    {
        $documentCategory = $this->documentCategoryRepository->find($data['document_category_id']);

        $document = new Document($documentCategory);

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'set' . implode('_', $pieces);

            if (method_exists($document, $method)) {
                $document->$method($value);
            }
        }

        return $document;
    }

    public function createDocumentCategoryFromData(array $data) : DocumentCategory
    {
        $documentCategory = new DocumentCategory();

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'set' . implode('_', $pieces);

            if (method_exists($documentCategory, $method)) {
                $documentCategory->$method($value);
            }
        }

        return $documentCategory;
    }

    public function updateDocumentFromData(Document $document, array $data) 
    {
        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'set' . implode('_', $pieces);

            if (method_exists($document, $method)) {
                $document->$method($value);
            }
        }
    }

    public function updateDocumentCategoryFromData(DocumentCategory $documentCategory, array $data) 
    {
        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'set' . implode('_', $pieces);

            if (method_exists($documentCategory, $method)) {
                $documentCategory->$method($value);
            }
        }
    }

    public function sanitiseDocumentData(array $data) : array
    {
        $documentCategory = $this->documentCategoryRepository->find($data['document_category_id']);

        $document = new Document($documentCategory);

        $stringValues = [];

        $intValues = [];

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'get' . implode('_', $pieces);

            if ($method != 'getId' && method_exists($document, $method)) {
                $objval = $document->$method($value);

                if (is_string($objval)) {
                    $stringValues[$key] = implode(' ', $pieces);
                }
                else if (is_int($objval)) {
                    $intValues[$key] = implode(' ', $pieces);
                }
            }
        }

        foreach ($stringValues as $key => $value) {
            $data[$key] = htmlentities($data[$key], ENT_QUOTES | ENT_IGNORE, "UTF-8");

            if (!is_string($data[$key])) {
                $data[$key] = ''; //don't allow null or false values in strings... filter var can return null
            }
        }


        foreach ($intValues as $key => $value) {
            $data[$key] = (int)$data[$key];

            if ($data[$key] < 0 || $data[$key] > 9999) {
                $data[$key] = 0;
            }
        }

        return $data;
    }

    public function sanitiseDocumentCategoryData(array $data) : array
    {
        $documentCategory = new DocumentCategory();

        $stringValues = [];

        $intValues = [];

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'get' . implode('_', $pieces);

            if ($method != 'getId' && method_exists($documentCategory, $method)) {
                $objval = $documentCategory->$method($value);

                if (is_string($objval)) {
                    $stringValues[$key] = implode(' ', $pieces);
                }
                else if (is_int($objval)) {
                    $intValues[$key] = implode(' ', $pieces);
                }
            }
        }

        foreach ($stringValues as $key => $value) {
            $data[$key] = htmlentities($data[$key], ENT_QUOTES | ENT_IGNORE, "UTF-8");

            if (!is_string($data[$key])) {
                $data[$key] = ''; //don't allow null or false values in strings... filter var can return null
            }
        }


        foreach ($intValues as $key => $value) {
            $data[$key] = (int)$data[$key];

            if ($data[$key] < 0 || $data[$key] > 9999) {
                $data[$key] = 0;
            }
        }

        return $data;
    }

    public function validateDocumentData(array $data) : array
    {
        $documentCategory = $this->documentCategoryRepository->find($data['document_category_id']);

        $document = new Document($documentCategory);

        $result = [
            'success' => true,
            'errors' => []
        ];

        $stringValues = [];

        $intValues = [];

        $requiredValues = [
            'title'
        ];

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'get' . implode('_', $pieces);

            if ($method != 'getId' && method_exists($document, $method)) {
                $objval = $document->$method($value);

                if (is_string($objval)) {
                    $stringValues[$key] = implode(' ', $pieces);
                }
                else if (is_int($objval)) {
                    $intValues[$key] = implode(' ', $pieces);
                }
            }
        }

        foreach ($stringValues as $key => $value) {
            if (isset($data[$key]) && is_string($data[$key])) {
                if (in_array($key, $requiredValues) && strlen($data[$key]) == 0) {
                    $result['errors'][] = $value . ' is required.';
                }
                else if (strlen($data[$key]) > 64) {
                    $result['errors'][] = $value . ' is too long.';
                }
            }   
            else {
                $result['errors'][] = $value . ' not provided.';
            }   
        }

        foreach ($intValues as $key => $value) {
            if (isset($data[$key]) && is_int($data[$key])) {
                if (in_array($key, $requiredValues) && $data[$key] == 0) {
                    $result['errors'][] = $value . ' is required.';
                }
                else if (strlen($data[$key]) < 0) {
                    $result['errors'][] = $value . ' cannot be negative.';
                }
            }   
            else {
                $result['errors'][] = $value . ' not provided.';
            }   
        }


        if (count($result['errors']) > 0) {
            $result['success'] = false;
        }

        return $result;
    }

    public function validateDocumentCategoryData(array $data) : array
    {
        $documentCategory = new DocumentCategory();

        $result = [
            'success' => true,
            'errors' => []
        ];

        $stringValues = [];

        $intValues = [];

        $requiredValues = [
            'category_name'
        ];

        foreach ($data as $key => $value) {
            $pieces = explode('_', $key);

            foreach ($pieces as $k => $v) {
                $pieces[$k] = ucfirst($v);
            }

            $method = 'get' . implode('_', $pieces);

            if ($method != 'getId' && method_exists($documentCategory, $method)) {
                $objval = $documentCategory->$method($value);

                if (is_string($objval)) {
                    $stringValues[$key] = implode(' ', $pieces);
                }
                else if (is_int($objval)) {
                    $intValues[$key] = implode(' ', $pieces);
                }
            }
        }

        foreach ($stringValues as $key => $value) {
            if (isset($data[$key]) && is_string($data[$key])) {
                if (in_array($key, $requiredValues) && strlen($data[$key]) == 0) {
                    $result['errors'][] = $value . ' is required.';
                }
                else if (strlen($data[$key]) > 64) {
                    $result['errors'][] = $value . ' is too long.';
                }
            }   
            else {
                $result['errors'][] = $value . ' not provided.';
            }   
        }

        foreach ($intValues as $key => $value) {
            if (isset($data[$key]) && is_int($data[$key])) {
                if (in_array($key, $requiredValues) && $data[$key] == 0) {
                    $result['errors'][] = $value . ' is required.';
                }
                else if (strlen($data[$key]) < 0) {
                    $result['errors'][] = $value . ' cannot be negative.';
                }
            }   
            else {
                $result['errors'][] = $value . ' not provided.';
            }   
        }


        if (count($result['errors']) > 0) {
            $result['success'] = false;
        }

        return $result;
    }

    public function deleteDocumentCategory(DocumentCategory $documentCategory)
    {  
        foreach ($documentCategory->getDocuments() as $document) {
            $this->deleteDocument($document);
        }

        $this->entityManager->remove($documentCategory);
        
        $this->entityManager->flush();
    }

    public function deleteDocument(Document $document) 
    {
        $this->fileService->delete('documentInternal', $document->getFilename());

        $this->entityManager->remove($document);
        
        $this->entityManager->flush();
    }
}