<?php

namespace Pterodactyl\Console\Commands;

use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Http;
use Pterodactyl\Models\Server;

class CheckModpackUpdates extends Command
{
    protected $signature = 'modpackchecker:check';
    protected $description = 'Check all servers for modpack updates';

    public function handle(): int
    {
        $this->info('Starting modpack update check...');

        // Get all servers that have modpack variables set
        $servers = Server::whereHas('variables', function ($q) {
            $q->where('env_variable', 'MODPACK_PLATFORM');
        })->get();

        $this->info("Found {$servers->count()} servers with modpack configuration");

        foreach ($servers as $server) {
            $this->checkServer($server);
            // Rate limiting - sleep between checks
            sleep(2);
        }

        $this->info('Modpack update check complete!');
        return 0;
    }

    private function checkServer(Server $server): void
    {
        $this->line("Checking: {$server->name} ({$server->uuid})");

        try {
            // Get platform and modpack ID from variables
            $platform = $this->getVariable($server, 'MODPACK_PLATFORM');
            $modpackId = $this->getVariable($server, 'MODPACK_ID');

            if (!$platform || !$modpackId) {
                $this->warn("  Skipping - missing platform or modpack ID");
                return;
            }

            // Get latest version from API
            $latestData = $this->fetchLatestVersion($platform, $modpackId);

            if (!$latestData) {
                $this->error("  Failed to fetch version data");
                $this->updateDatabase($server, [
                    'platform' => $platform,
                    'modpack_id' => $modpackId,
                    'error_message' => 'Failed to fetch version data',
                    'update_available' => false,
                ]);
                return;
            }

            // Get current version (from variable or file - for now just use variable)
            $currentVersion = $this->getVariable($server, 'MODPACK_CURRENT_VERSION');

            // Determine if update is available
            $updateAvailable = $currentVersion && $currentVersion !== $latestData['version'];

            $this->updateDatabase($server, [
                'platform' => $platform,
                'modpack_id' => $modpackId,
                'modpack_name' => $latestData['name'],
                'current_version' => $currentVersion,
                'latest_version' => $latestData['version'],
                'update_available' => $updateAvailable,
                'error_message' => null,
            ]);

            $status = $updateAvailable ? '🟠 UPDATE AVAILABLE' : '🟢 Up to date';
            $this->info("  {$status}: {$latestData['name']} - {$latestData['version']}");

        } catch (\Exception $e) {
            $this->error("  Error: {$e->getMessage()}");
            $this->updateDatabase($server, [
                'error_message' => $e->getMessage(),
                'update_available' => false,
            ]);
        }
    }

    private function getVariable(Server $server, string $name): ?string
    {
        $variable = $server->variables()
            ->where('env_variable', $name)
            ->first();
        return $variable?->server_value;
    }

    private function fetchLatestVersion(string $platform, string $modpackId): ?array
    {
        return match($platform) {
            'modrinth' => $this->checkModrinth($modpackId),
            'curseforge' => $this->checkCurseForge($modpackId),
            'ftb' => $this->checkFTB($modpackId),
            'technic' => $this->checkTechnic($modpackId),
            default => null,
        };
    }

    private function checkModrinth(string $projectId): ?array
    {
        $response = Http::withHeaders([
            'User-Agent' => 'FirefrostGaming/ModpackChecker/1.0',
        ])->get("https://api.modrinth.com/v2/project/{$projectId}");

        if (!$response->successful()) return null;
        $project = $response->json();

        $versionResponse = Http::withHeaders([
            'User-Agent' => 'FirefrostGaming/ModpackChecker/1.0',
        ])->get("https://api.modrinth.com/v2/project/{$projectId}/version");

        $versions = $versionResponse->json();

        return [
            'name' => $project['title'] ?? 'Unknown',
            'version' => $versions[0]['version_number'] ?? 'Unknown',
        ];
    }

    private function checkCurseForge(string $modpackId): ?array
    {
        $apiKey = DB::table('settings')
            ->where('key', 'like', '%modpackchecker::curseforge_api_key%')
            ->value('value');

        if (!$apiKey) return null;

        $response = Http::withHeaders([
            'x-api-key' => $apiKey,
        ])->get("https://api.curseforge.com/v1/mods/{$modpackId}");

        if (!$response->successful()) return null;
        $data = $response->json()['data'] ?? [];

        return [
            'name' => $data['name'] ?? 'Unknown',
            'version' => $data['latestFiles'][0]['displayName'] ?? 'Unknown',
        ];
    }

    private function checkFTB(string $modpackId): ?array
    {
        $response = Http::get("https://api.modpacks.ch/public/modpack/{$modpackId}");
        if (!$response->successful()) return null;
        $data = $response->json();

        return [
            'name' => $data['name'] ?? 'Unknown',
            'version' => $data['versions'][0]['name'] ?? 'Unknown',
        ];
    }

    private function checkTechnic(string $slug): ?array
    {
        $response = Http::get("https://api.technicpack.net/modpack/{$slug}?build=1");
        if (!$response->successful()) return null;
        $data = $response->json();

        return [
            'name' => $data['displayName'] ?? $data['name'] ?? 'Unknown',
            'version' => $data['version'] ?? 'Unknown',
        ];
    }

    private function updateDatabase(Server $server, array $data): void
    {
        DB::table('modpackchecker_servers')->updateOrInsert(
            ['server_id' => $server->id],
            array_merge($data, [
                'server_uuid' => $server->uuid,
                'last_checked' => now(),
                'updated_at' => now(),
            ])
        );
    }
}