<?php

declare(strict_types=1);

namespace App\Services\Emulator;

use App\Services\Emulator\EmulatorSourceService;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Process;
use Illuminate\Support\Str;

class EmulatorJarService
{
    use EmulatorConfiguration;

    public function __construct()
    {
        $this->loadConfiguration();
    }

    public function isConfigured(): bool
    {
        return ! in_array($this->githubUrl, [null, '', '0'], true) || ! in_array($this->jarDirectUrl, [null, '', '0'], true);
    }

    public function checkForUpdates(): array
    {
        if (! $this->isConfigured()) {
            return [
                'update_available' => false,
                'error' => 'Configureer een GitHub URL of directe .jar URL',
            ];
        }

        $sourceService = new EmulatorSourceService;
        $sourceInfo = $sourceService->checkForUpdates();
        $hasSourceUpdates = $sourceInfo && $sourceInfo['has_update'];

        if (! in_array($this->jarDirectUrl, [null, '', '0'], true)) {
            return $this->checkDirectUrlUpdates($sourceInfo, $hasSourceUpdates);
        }

        return $this->checkGitHubFolderUpdates($sourceInfo, $hasSourceUpdates);
    }

    public function performUpdate(array $check): array
    {
        $jarUrl = $check['jar_url'];
        $jarName = $check['jar_name'];
        $version = $check['latest_version'];
        $serviceName = $this->emulatorService;

        $tempDir = '/tmp/emulator-update-' . Str::random(8);
        $tempJar = $tempDir . '/' . $jarName;

        $updateScript = $this->buildUpdateScript($jarUrl, $jarName, $tempDir, $tempJar, $serviceName);

        $scriptPath = '/tmp/emulator_update_' . uniqid() . '.sh';
        file_put_contents($scriptPath, $updateScript);
        chmod($scriptPath, 0755);

        Log::info('[EmulatorJar] Starting update', [
            'version' => $version,
            'jar' => $jarName,
            'url' => $jarUrl,
        ]);

        try {
            $result = Process::timeout(600)->run('bash ' . $scriptPath . ' 2>&1');
            @unlink($scriptPath);

            if ($result->exitCode() !== 0) {
                Log::error('[EmulatorJar] Update failed', [
                    'output' => $result->output(),
                    'error' => $result->errorOutput(),
                ]);

                return [
                    'success' => false,
                    'error' => 'Update mislukt: ' . substr($result->output(), 0, 300),
                ];
            }

            $this->storeUpdateInfo($version, $check);

            Log::info('[EmulatorJar] Update successful');

            return [
                'success' => true,
                'version' => $version,
                'jar' => $jarName,
                'message' => "✅ Emulator geüpdatet naar v{$version}!\n📦 {$jarName}\n🔄 Service herstart",
            ];
        } catch (\Exception $e) {
            Log::error('[EmulatorJar] Exception', ['error' => $e->getMessage()]);

            return [
                'success' => false,
                'error' => $e->getMessage(),
            ];
        }
    }

    public function findLatestJar(): ?array
    {
        if (! $this->githubRepo) {
            return null;
        }

        $branch = $this->githubBranch ?: 'main';

        $commonNames = ['arcturus.jar', 'Arcturus.jar', 'emulator.jar', 'habbo.jar', 'hotel.jar'];

        foreach ($commonNames as $name) {
            try {
                $apiUrl = "https://api.github.com/repos/{$this->githubRepo}/contents/Latest_Compiled_Version/{$name}?ref={$branch}";
                $response = Http::timeout(10)
                    ->withHeaders([
                        'Accept' => 'application/vnd.github.v3+json',
                        'User-Agent' => 'AtomCMS-Emulator-Updater',
                    ])
                    ->get($apiUrl);

                if (! $response->successful()) {
                    continue;
                }

                $data = json_decode($response->body(), true);

                if (! isset($data['sha']) || ! isset($data['download_url'])) {
                    continue;
                }

                $commitDate = null;
                $commitSha = $data['sha'];

                try {
                    $commitsResponse = Http::timeout(10)
                        ->withHeaders([
                            'Accept' => 'application/vnd.github.v3+json',
                            'User-Agent' => 'AtomCMS-Emulator-Updater',
                        ])
                        ->get("https://api.github.com/repos/{$this->githubRepo}/commits", [
                            'path' => "Latest_Compiled_Version/{$name}",
                            'sha' => $branch,
                            'per_page' => 1,
                        ]);

                    if ($commitsResponse->successful()) {
                        $commits = $commitsResponse->json();
                        if (! empty($commits) && isset($commits[0]['commit']['committer']['date'])) {
                            $commitDate = strtotime($commits[0]['commit']['committer']['date']);
                            $commitSha = $commits[0]['sha'] ?? $data['sha'];
                        }
                    }
                } catch (\Exception) {
                    Log::debug('[EmulatorJar] Could not fetch commit date for ' . $name);
                }

                $installedDate = $this->settings->getOrDefault('emulator_jar_installed_date', null);
                $installedJarCommit = $this->settings->getOrDefault('emulator_jar_commit', null);

                $isUpdate = false;
                if ($installedJarCommit !== null && $commitSha !== null) {
                    $isUpdate = $installedJarCommit !== $commitSha;
                } elseif ($installedDate !== null && $commitDate) {
                    $isUpdate = (int) $installedDate < $commitDate;
                } elseif ($installedDate === null && $commitDate) {
                    $isUpdate = true;
                }

                $version = $this->extractVersionFromFilename($name);
                if ($version === '' || $version === '0') {
                    $version = $commitDate ? date('Y.m.d', $commitDate) : date('Y.m.d');
                }

                return [
                    'name' => $name,
                    'url' => $data['download_url'],
                    'version' => $version,
                    'commit' => $commitSha,
                    'commit_date' => $commitDate,
                    'is_update' => $isUpdate,
                    'installed_date' => $installedDate,
                ];
            } catch (\Exception $e) {
                Log::warning('[EmulatorJar] Error checking JAR file ' . $name, ['error' => $e->getMessage()]);
            }
        }

        return null;
    }

    private function checkDirectUrlUpdates(?array $sourceInfo, bool $hasSourceUpdates): array
    {
        $jarInfo = $this->validateDirectUrl($this->jarDirectUrl);

        if ($jarInfo) {
            if (! empty($jarInfo['version'])) {
                $currentVersion = $this->settings->getOrDefault('emulator_version', '0.0.0');
                if ($jarInfo['version'] !== $currentVersion) {
                    $this->settings->set('emulator_version', $jarInfo['version']);
                }
            }

            $hasJarUpdates = $jarInfo['is_update'] ?? false;

            if ($hasSourceUpdates && ! $hasJarUpdates) {
                return [
                    'update_available' => true,
                    'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                    'latest_version' => $sourceInfo['latest_timestamp'] ? date('Y.m.d', $sourceInfo['latest_timestamp']) : $jarInfo['version'],
                    'release_name' => 'Source Update',
                    'jar_url' => null,
                    'jar_name' => null,
                    'jar_size' => 'Onbekend',
                    'type' => 'source_build',
                    'source_info' => $sourceInfo,
                    'message' => 'Nieuwe commits beschikbaar - build vanaf source nodig',
                ];
            }

            return [
                'update_available' => $hasJarUpdates || $hasSourceUpdates,
                'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                'latest_version' => $jarInfo['version'],
                'release_name' => $hasSourceUpdates ? 'Source Update' : 'Direct URL',
                'jar_url' => $this->jarDirectUrl,
                'jar_name' => $jarInfo['name'],
                'jar_size' => 'Onbekend',
                'type' => $hasSourceUpdates ? 'source_build' : 'direct_url',
                'commit' => $jarInfo['commit_sha'] ?? null,
                'source_info' => $sourceInfo,
                'has_source_updates' => $hasSourceUpdates,
            ];
        }

        if ($hasSourceUpdates) {
            return [
                'update_available' => true,
                'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                'latest_version' => $sourceInfo['latest_timestamp'] ? date('Y.m.d', $sourceInfo['latest_timestamp']) : 'Onbekend',
                'release_name' => 'Source Update',
                'jar_url' => null,
                'jar_name' => null,
                'jar_size' => 'Onbekend',
                'type' => 'source_build',
                'source_info' => $sourceInfo,
                'message' => 'Nieuwe commits beschikbaar - build vanaf source nodig',
            ];
        }

        return [
            'update_available' => false,
            'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
            'error' => 'Directe .jar URL is niet bereikbaar',
        ];
    }

    private function checkGitHubFolderUpdates(?array $sourceInfo, bool $hasSourceUpdates): array
    {
        $jarInfo = $this->findLatestJar();

        if (! $jarInfo) {
            if ($hasSourceUpdates) {
                return [
                    'update_available' => true,
                    'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                    'latest_version' => $sourceInfo['latest_timestamp'] ? date('Y.m.d', $sourceInfo['latest_timestamp']) : 'Onbekend',
                    'release_name' => 'Source Update',
                    'jar_url' => null,
                    'jar_name' => null,
                    'jar_size' => 'Onbekend',
                    'type' => 'source_build',
                    'source_info' => $sourceInfo,
                    'message' => 'Nieuwe commits beschikbaar - build vanaf source nodig',
                ];
            }

            return [
                'update_available' => false,
                'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                'latest_version' => 'Onbekend',
                'error' => 'Kon geen .jar bestand vinden',
                'type' => 'not_found',
                'source_available' => $sourceInfo !== null,
            ];
        }

        $version = $jarInfo['version'];
        $hasJarUpdates = $jarInfo['is_update'] ?? false;

        if ($hasSourceUpdates && ! $hasJarUpdates) {
            return [
                'update_available' => true,
                'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
                'latest_version' => $sourceInfo['latest_timestamp'] ? date('Y.m.d', $sourceInfo['latest_timestamp']) : $version,
                'release_name' => 'Source Update',
                'jar_url' => null,
                'jar_name' => null,
                'jar_size' => 'Onbekend',
                'type' => 'source_build',
                'source_info' => $sourceInfo,
                'message' => 'Nieuwe commits beschikbaar - build vanaf source nodig',
            ];
        }

        return [
            'update_available' => $hasJarUpdates || $hasSourceUpdates,
            'current_version' => $this->settings->getOrDefault('emulator_version', '0.0.0'),
            'latest_version' => $hasSourceUpdates ? ($sourceInfo['latest_timestamp'] ? date('Y.m.d', $sourceInfo['latest_timestamp']) : $version) : $version,
            'release_name' => $hasSourceUpdates ? 'Source Update' : 'Latest from GitHub',
            'jar_url' => $jarInfo['url'],
            'jar_name' => $jarInfo['name'],
            'jar_size' => 'Onbekend',
            'type' => $hasSourceUpdates ? 'source_build' : 'github_folder',
            'commit' => $jarInfo['commit'] ?? null,
            'commit_date' => $jarInfo['commit_date'] ?? null,
            'source_info' => $sourceInfo,
            'has_source_updates' => $hasSourceUpdates,
        ];
    }

    private function validateDirectUrl(string $url): ?array
    {
        if ($url === '' || $url === '0' || ! str_ends_with(strtolower($url), '.jar')) {
            return null;
        }

        try {
            $jarName = basename(parse_url($url, PHP_URL_PATH));
            $version = $this->extractVersionFromFilename($jarName);
            $storedVersion = $this->settings->getOrDefault('emulator_version', '0.0.0');

            $lastModified = null;
            $commitSha = null;
            $gitHubInfoAvailable = false;

            if (preg_match('/github\.com\/([^\/]+)\/([^\/]+)\/raw\/refs\/heads\/([^\/]+)\/(.+)/', $url, $matches)) {
                $owner = $matches[1];
                $repo = $matches[2];
                $branch = $matches[3];
                $path = $matches[4];

                try {
                    $apiResponse = Http::timeout(10)
                        ->withHeaders([
                            'Accept' => 'application/vnd.github.v3+json',
                            'User-Agent' => 'AtomCMS-Emulator-Updater',
                        ])
                        ->get("https://api.github.com/repos/{$owner}/{$repo}/contents/{$path}", [
                            'ref' => $branch,
                        ]);

                    if ($apiResponse->successful()) {
                        $data = $apiResponse->json();

                        if (isset($data['sha']) && ! isset($data['message'])) {
                            $gitHubInfoAvailable = true;
                            $commitSha = $data['sha'];

                            if (isset($data['commit']['committer']['date'])) {
                                $lastModified = strtotime($data['commit']['committer']['date']);
                            }
                        }
                    }
                } catch (\Exception) {
                    Log::debug('[EmulatorJar] Could not fetch GitHub commit info for direct URL');
                }
            }

            if ($lastModified === null) {
                $response = Http::timeout(10)->head($url);
                if ($response->successful()) {
                    $modifiedSince = $response->header('Last-Modified');
                    if ($modifiedSince) {
                        $lastModified = strtotime($modifiedSince);
                        if ($lastModified === false) {
                            $lastModified = null;
                        }
                    }
                }
            }

            $isUpdate = false;
            $installedDate = $this->settings->getOrDefault('emulator_jar_installed_date', null);

            $storedData = $this->settings->getOrDefault('emulator_direct_url_info_' . md5($url));
            if ($storedData !== null && is_string($storedData)) {
                $storedDataArray = json_decode($storedData, true);
                if (is_array($storedDataArray)) {
                    if ($gitHubInfoAvailable && $commitSha !== null && isset($storedDataArray['commit_sha'])) {
                        $isUpdate = $commitSha !== $storedDataArray['commit_sha'];
                    } elseif ($lastModified !== null && $installedDate !== null) {
                        $isUpdate = (int) $installedDate < $lastModified;
                    } elseif ($lastModified !== null && isset($storedDataArray['last_modified'])) {
                        $isUpdate = $lastModified > $storedDataArray['last_modified'];
                    } elseif (! in_array($version, ['', '0', $storedVersion], true)) {
                        $isUpdate = version_compare($version, $storedVersion) > 0;
                    }
                }
            } else {
                $isUpdate = true;
            }

            $infoToStore = [
                'last_checked' => time(),
                'version' => $version,
            ];
            if ($lastModified) {
                $infoToStore['last_modified'] = $lastModified;
            }
            if ($commitSha) {
                $infoToStore['commit_sha'] = $commitSha;
            }
            $this->settings->set('emulator_direct_url_info_' . md5($url), json_encode($infoToStore));

            return [
                'name' => $jarName,
                'version' => $version,
                'last_modified' => $lastModified,
                'commit_sha' => $commitSha,
                'is_update' => $isUpdate,
                'gitHub_rate_limited' => ! $gitHubInfoAvailable && preg_match('/github\.com/', $url),
            ];
        } catch (\Exception $e) {
            Log::warning('[EmulatorJar] Direct URL not reachable', ['error' => $e->getMessage()]);
        }

        return null;
    }

    private function buildUpdateScript(string $jarUrl, string $jarName, string $tempDir, string $tempJar, string $serviceName): string
    {
        return <<<BASH
#!/bin/bash
set -e

JAR_URL='{$jarUrl}'
JAR_NAME='{$jarName}'
JAR_PATH='{$this->jarPath}'
SERVICE='{$serviceName}'
TEMP_DIR='{$tempDir}'
TEMP_JAR='{$tempJar}'

mkdir -p "\$TEMP_DIR" "\$JAR_PATH"

if ls "\$JAR_PATH"/*.jar 1>/dev/null 2>&1; then
    mkdir -p "\$JAR_PATH/backup"
    mv "\$JAR_PATH"/*.jar "\$JAR_PATH/backup/" 2>/dev/null || true
fi

download_success=false
for attempt in 1 2 3; do
    if curl -L --max-time 300 --retry 3 --retry-delay 5 -o "\$TEMP_JAR" "\$JAR_URL" 2>&1; then
        FILE_TYPE=\$(file -b "\$TEMP_JAR" 2>/dev/null)
        JAR_SIZE=\$(stat -c%s "\$TEMP_JAR" 2>/dev/null || echo 0)

        if echo "\$FILE_TYPE" | grep -qi "zip\|jar\|archive" && [ "\$JAR_SIZE" -gt 1000 ]; then
            download_success=true
            break
        else
            rm -f "\$TEMP_JAR" 2>/dev/null || true
            sleep 3
        fi
    else
        sleep 5
    fi
done

if [ "\$download_success" = false ]; then
    if ls "\$JAR_PATH/backup"/*.jar 1>/dev/null 2>&1; then
        mv "\$JAR_PATH/backup"/*.jar "\$JAR_PATH/" 2>/dev/null || true
    fi
    rm -rf "\$TEMP_DIR"
    exit 1
fi

mv "\$TEMP_JAR" "\$JAR_PATH/"
chown -R www-data:www-data "\$JAR_PATH"
chmod 755 "\$JAR_PATH/\$JAR_NAME"

systemctl restart "\$SERVICE" 2>&1 || service "\$SERVICE" restart 2>&1 || true

rm -rf "\$TEMP_DIR" 2>/dev/null || true
BASH;
    }

    private function storeUpdateInfo(string $version, array $check): void
    {
        setting('emulator_version', $version);

        $commitDate = $check['commit_date'] ?? time();
        $this->settings->set('emulator_jar_installed_date', (string) $commitDate);
        $this->settings->set('emulator_jar_commit', $check['commit'] ?? null);

        $sourceSha = $check['source_info']['latest_sha'] ?? $check['commit'] ?? null;
        $sourceDate = $check['source_info']['latest_timestamp'] ?? ($check['commit_date'] ?? time());
        if ($sourceSha) {
            $this->settings->set('emulator_source_commit', $sourceSha);
        }
        if ($sourceDate) {
            $this->settings->set('emulator_source_date', (string) $sourceDate);
        }

        $currentBranch = $this->sourceBranch ?: $this->githubBranch ?: 'main';
        $this->settings->set('emulator_installed_branch', $currentBranch);
    }
}