<?php
require_once 'config.php';

$method = $_SERVER['REQUEST_METHOD'];

// Vérifier les droits admin
$user = requireAdmin();

if ($method !== 'POST') {
    jsonResponse(['error' => 'Méthode non autorisée'], 405);
}

$data = getJsonInput();

if (!isset($data['match_id']) || !isset($data['winner_id']) || !isset($data['score'])) {
    jsonResponse(['error' => 'match_id, winner_id et score requis'], 400);
}

$db = getDB();

// Vérifier que le match existe
$stmt = $db->prepare("SELECT id, player1_id, player2_id, status FROM matches WHERE id = ?");
$stmt->execute([$data['match_id']]);
$match = $stmt->fetch();

if (!$match) {
    jsonResponse(['error' => 'Match non trouvé'], 404);
}

if ($match['status'] === 'completed') {
    jsonResponse(['error' => 'Ce match a déjà un résultat'], 400);
}

// Vérifier que le gagnant est l'un des deux joueurs
if ($data['winner_id'] != $match['player1_id'] && $data['winner_id'] != $match['player2_id']) {
    jsonResponse(['error' => 'Le gagnant doit être l\'un des deux joueurs du match'], 400);
}

$db->beginTransaction();

try {
    // Mettre à jour le match
    $stmt = $db->prepare("
        UPDATE matches 
        SET status = 'completed', winner_id = ?, score = ? 
        WHERE id = ?
    ");
    $stmt->execute([$data['winner_id'], $data['score'], $data['match_id']]);
    
    // Mettre à jour les pronostics
    $stmt = $db->prepare("
        UPDATE predictions 
        SET is_correct = CASE 
            WHEN predicted_winner_id = ? THEN 1 
            ELSE 0 
        END
        WHERE match_id = ?
    ");
    $stmt->execute([$data['winner_id'], $data['match_id']]);
    
    // Ajouter les points bonus pour les pronostics corrects
    $stmt = $db->prepare("
        UPDATE users u
        JOIN predictions p ON u.id = p.user_id
        SET u.points = u.points + ?
        WHERE p.match_id = ? AND p.predicted_winner_id = ?
    ");
    $stmt->execute([POINTS_CORRECT_PREDICTION, $data['match_id'], $data['winner_id']]);
    
    $db->commit();
    
    // Compter les pronostics corrects
    $stmt = $db->prepare("
        SELECT COUNT(*) as correct_count 
        FROM predictions 
        WHERE match_id = ? AND predicted_winner_id = ?
    ");
    $stmt->execute([$data['match_id'], $data['winner_id']]);
    $correctCount = $stmt->fetch()['correct_count'];
    
    jsonResponse([
        'success' => true,
        'message' => 'Résultat enregistré avec succès',
        'correct_predictions' => (int)$correctCount,
        'points_distributed' => $correctCount * POINTS_CORRECT_PREDICTION
    ]);
    
} catch (Exception $e) {
    $db->rollBack();
    jsonResponse(['error' => 'Erreur lors de l\'enregistrement du résultat: ' . $e->getMessage()], 500);
}
?>