<?php
/************************************************************************
 * LegalAssistance Extension — AfterUninstall
 *
 * 1. Remove plugin files from ai-gateway
 * 2. Drop LegalAid and DirectAccessReport DB tables (with warning log)
 * 3. Remove LegalAssistance-specific columns from Case table
 * 4. Remove DocumentTemplate records created by this extension
 * 5. Clear cache
 ************************************************************************/

use Espo\Core\Container;
use Espo\Core\DataManager;
use Espo\Core\ORM\EntityManager;
use Espo\Core\Utils\Log;

class AfterUninstall
{
    public function run(Container $container): void
    {
        /** @var Log $log */
        $log = $container->getByClass(Log::class);
        /** @var EntityManager $entityManager */
        $entityManager = $container->getByClass(EntityManager::class);

        $log->info('LegalAssistance: Running AfterUninstall...');

        // 1. Remove ai-gateway plugin files
        $this->removePluginFiles($log);

        // 2. Drop tables created by this extension
        $this->dropTables($entityManager, $log);

        // 3. Remove LegalAssistance-specific columns from Case
        $this->cleanCaseColumns($entityManager, $log);

        // 4. Remove DocumentTemplate records
        $this->removeDocumentTemplates($entityManager, $log);

        // 5. Remove custom i18n files
        $this->removeCustomI18n($log);

        // 6. Clear cache
        try {
            $dataManager = $container->getByClass(DataManager::class);
            $dataManager->clearCache();
            $log->info('LegalAssistance: Cache cleared.');
        } catch (\Throwable $e) {
            $log->warning('LegalAssistance: Cache clear failed: ' . $e->getMessage());
        }

        $log->info('LegalAssistance: AfterUninstall completed.');
    }

    private function removePluginFiles(Log $log): void
    {
        $gatewayPaths = [
            '/home/chaim/ai-gateway/plugins/legal-assistance',
            '/opt/ai-gateway/plugins/legal-assistance',
        ];

        foreach ($gatewayPaths as $dir) {
            if (is_dir($dir)) {
                $files = glob($dir . '/*');
                foreach ($files as $file) {
                    if (is_file($file)) {
                        unlink($file);
                    }
                }
                rmdir($dir);
                $log->info("LegalAssistance: Removed plugin files from {$dir}");
            }
        }
    }

    private function dropTables(EntityManager $entityManager, Log $log): void
    {
        $pdo = $entityManager->getPDO();

        $tables = ['legal_aid', 'direct_access_report'];

        foreach ($tables as $table) {
            try {
                $check = $pdo->query("SHOW TABLES LIKE '{$table}'")->rowCount();
                if ($check > 0) {
                    $count = $pdo->query("SELECT COUNT(*) FROM `{$table}`")->fetchColumn();
                    $log->warning("LegalAssistance: Dropping table '{$table}' ({$count} rows).");
                    $pdo->exec("DROP TABLE `{$table}`");
                    $log->info("LegalAssistance: Table '{$table}' dropped.");
                }
            } catch (\Throwable $e) {
                $log->warning("LegalAssistance: Failed to drop table '{$table}': " . $e->getMessage());
            }
        }
    }

    private function cleanCaseColumns(EntityManager $entityManager, Log $log): void
    {
        $pdo = $entityManager->getPDO();

        // Only columns that LegalAssistance module added to Case
        $columns = [
            'c_legal_aid_type',
            'c_aid_type',
            'c_urgency_level',
            'c_appointment_date',
            'c_filing_deadline',
        ];

        try {
            $stmt = $pdo->query("SHOW COLUMNS FROM `case`");
            $existing = array_column($stmt->fetchAll(\PDO::FETCH_ASSOC), 'Field');

            foreach ($columns as $col) {
                if (in_array($col, $existing)) {
                    $pdo->exec("ALTER TABLE `case` DROP COLUMN `{$col}`");
                    $log->info("LegalAssistance: Dropped column case.{$col}");
                }
            }
        } catch (\Throwable $e) {
            $log->warning("LegalAssistance: Failed to clean Case columns: " . $e->getMessage());
        }
    }

    private function removeDocumentTemplates(EntityManager $entityManager, Log $log): void
    {
        try {
            $template = $entityManager
                ->getRDBRepository('DocumentTemplate')
                ->where(['name' => 'דוח גישה ישירה'])
                ->findOne();

            if ($template) {
                $fileId = $template->get('fileId');
                $entityManager->removeEntity($template);
                $log->info("LegalAssistance: Removed DocumentTemplate 'דוח גישה ישירה'");

                // Remove the attachment file
                if ($fileId) {
                    $attachment = $entityManager->getEntityById('Attachment', $fileId);
                    if ($attachment) {
                        $filePath = 'data/upload/' . $fileId;
                        if (file_exists($filePath)) {
                            unlink($filePath);
                        }
                        $entityManager->removeEntity($attachment);
                        $log->info("LegalAssistance: Removed template attachment file");
                    }
                }
            }
        } catch (\Throwable $e) {
            $log->warning("LegalAssistance: Failed to remove DocumentTemplate: " . $e->getMessage());
        }
    }

    private function removeCustomI18n(Log $log): void
    {
        $files = [
            'custom/Espo/Custom/Resources/i18n/fa_IR/DirectAccessReport.json',
            'custom/Espo/Custom/Resources/i18n/fa_IR/LegalAid.json',
            'custom/Espo/Custom/Resources/i18n/he_IL/DirectAccessReport.json',
            'custom/Espo/Custom/Resources/i18n/he_IL/LegalAid.json',
            'custom/Espo/Custom/Resources/i18n/en_US/DirectAccessReport.json',
            'custom/Espo/Custom/Resources/i18n/en_US/LegalAid.json',
        ];

        foreach ($files as $file) {
            if (file_exists($file)) {
                unlink($file);
                $log->info("LegalAssistance: Removed {$file}");
            }
        }
    }
}