<?php

namespace App\Controllers;

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use App\Models\Source;
use App\Models\SyncLog;
use App\Services\SteamSyncService;
use App\Services\JellyfinSyncService;
use App\Services\StashSyncService;
use App\Services\XbvrSyncService;
use App\Services\AdultSyncService;
use App\Services\ExophaseSyncService;
use PDO;
use Slim\Views\Twig;

class AdminController extends Controller
{
    private PDO $pdo;

    public function __construct(PDO $pdo, Twig $view)
    {
        parent::__construct($view);
        $this->pdo = $pdo;
    }

    public function index(Request $request, Response $response, $args)
    {
        $sourceModel = new Source($this->pdo);
        $sources = $sourceModel->findAll();

        $syncLogModel = new SyncLog($this->pdo);
        $recentSyncs = SyncLog::getRecent($this->pdo, 10);

        return $this->view->render($response, 'admin/index.twig', [
            'title' => 'Admin Dashboard',
            'sources' => $sources,
            'recent_syncs' => $recentSyncs
        ]);
    }

    public function syncSource(Request $request, Response $response, $args)
    {
        $sourceId = $args['id'];
        $syncType = $request->getQueryParams()['type'] ?? 'full';

        $sourceModel = new Source($this->pdo);
        $source = $sourceModel->find($sourceId);

        if (!$source) {
            return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
        }

        // Validate sync type based on source type
        if ($source['name'] === 'jellyfin') {
            $validSyncTypes = ['full', 'incremental', 'all', 'movies', 'tvshows', 'cleanup'];
            if (!in_array($syncType, $validSyncTypes)) {
                return $this->json($response, [
                    'success' => false,
                    'message' => 'Invalid sync type for Jellyfin source. Valid types: ' . implode(', ', $validSyncTypes)
                ], 400);
            }
        } else {
            // For other sources, only allow full/incremental
            $validSyncTypes = ['full', 'incremental'];
            if (!in_array($syncType, $validSyncTypes)) {
                return $this->json($response, [
                    'success' => false,
                    'message' => 'Invalid sync type. Valid types: ' . implode(', ', $validSyncTypes)
                ], 400);
            }
        }

        // Start sync in background (simplified - in production you'd use queues)
        $syncLogId = $this->startSync($source, $syncType);

        return $this->json($response, [
            'success' => true,
            'sync_log_id' => $syncLogId,
            'message' => 'Sync started successfully'
        ]);
    }

    public function syncStatus(Request $request, Response $response, $args)
    {
        $syncLogId = $args['id'];

        $syncLogModel = new SyncLog($this->pdo);
        $syncLog = $syncLogModel->find($syncLogId);

        if (!$syncLog) {
            return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
        }

        return $this->json($response, [
            'id' => $syncLog['id'],
            'status' => $syncLog['status'],
            'sync_type' => $syncLog['sync_type'],
            'total_items' => $syncLog['total_items'] ?? 0,
            'processed_items' => $syncLog['processed_items'],
            'new_items' => $syncLog['new_items'],
            'updated_items' => $syncLog['updated_items'],
            'deleted_items' => $syncLog['deleted_items'],
            'started_at' => $syncLog['started_at'],
            'completed_at' => $syncLog['completed_at'],
            'message' => $syncLog['message'],
            'errors' => $syncLog['errors'] ? json_decode($syncLog['errors'], true) : [],
            'progress_percentage' => $this->calculateProgressPercentage($syncLog)
        ]);
    }

    private function calculateProgressPercentage(array $syncLog): float
    {
        $total = $syncLog['total_items'] ?? 0;
        if ($total <= 0) return 0;

        $processed = $syncLog['processed_items'] ?? 0;
        return min(100, round(($processed / $total) * 100, 2));
    }

    public function sources(Request $request, Response $response, $args)
    {
        $sourceModel = new Source($this->pdo);
        $sources = $sourceModel->findAll();

        return $this->view->render($response, 'admin/sources.twig', [
            'title' => 'Source Management',
            'sources' => $sources
        ]);
    }

    private function startSync(array $source, string $syncType): int
    {
        // Create sync log entry first
        $syncLogId = $this->createSyncLog($source, $syncType);

        // Start sync in background process
        $this->startBackgroundSync($source['id'], $syncType, $syncLogId);

        return $syncLogId;
    }

    private function createSyncLog(array $source, string $syncType): int
    {
        $data = [
            'source_id' => $source['id'],
            'sync_type' => $syncType,
            'status' => 'started',
            'total_items' => 0,
            'processed_items' => 0,
            'new_items' => 0,
            'updated_items' => 0,
            'deleted_items' => 0,
            'started_at' => date('Y-m-d H:i:s')
        ];

        $columns = array_keys($data);
        $placeholders = array_map(fn($col) => ":$col", $columns);
        $sql = "INSERT INTO sync_logs (" . implode(', ', $columns) . ") VALUES (" . implode(', ', $placeholders) . ")";

        $stmt = $this->pdo->prepare($sql);
        $stmt->execute($data);

        return (int) $this->pdo->lastInsertId();
    }

    private function startBackgroundSync(int $sourceId, string $syncType, int $syncLogId): void
    {
        $scriptPath = __DIR__ . '/../../sync-runner.php';
        $command = sprintf(
            'php %s %d %s %d > /dev/null 2>&1 &',
            escapeshellarg($scriptPath),
            $sourceId,
            escapeshellarg($syncType),
            $syncLogId
        );

        // Execute the command in background
        if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
            // Windows
            pclose(popen('start /B ' . $command, 'r'));
        } else {
            // Unix-like systems
            exec($command);
        }

          //  */
        // Update sync log to indicate it's running (this will be updated again by the script)
        $syncLogModel = new SyncLog($this->pdo);
        $syncLogModel->update($syncLogId, [
            'status' => 'running',
            'message' => 'Sync process starting in background'
        ]);
    }
}