<?php
require_once 'config.php';

$method = $_SERVER['REQUEST_METHOD'];
$action = $_GET['action'] ?? '';
$id = $_GET['id'] ?? null;

switch ($method) {
    case 'GET':
        if ($id) {
            getMatch($id);
        } else {
            getAllMatches();
        }
        break;
    
    case 'POST':
        requireAdmin();
        addMatch();
        break;
    
    case 'PUT':
        requireAdmin();
        updateMatch($id);
        break;
    
    case 'DELETE':
        requireAdmin();
        deleteMatch($id);
        break;
    
    default:
        jsonResponse(['error' => 'Méthode non autorisée'], 405);
}

function getAllMatches() {
    $db = getDB();
    
    $stmt = $db->query("
        SELECT m.*, 
            p1.id as p1_id, p1.name as p1_name, p1.photo_url as p1_photo, p1.ranking as p1_ranking,
            p1.nationality as p1_nationality, p1.handedness as p1_handedness,
            p2.id as p2_id, p2.name as p2_name, p2.photo_url as p2_photo, p2.ranking as p2_ranking,
            p2.nationality as p2_nationality, p2.handedness as p2_handedness,
            pw.name as winner_name
        FROM matches m
        JOIN players p1 ON m.player1_id = p1.id
        JOIN players p2 ON m.player2_id = p2.id
        LEFT JOIN players pw ON m.winner_id = pw.id
        ORDER BY m.match_date DESC, 
            CASE m.round 
                WHEN 'Finale' THEN 1 
                WHEN 'Demi-finale' THEN 2 
                WHEN 'Quart de finale' THEN 3 
                WHEN '8ème de finale' THEN 4 
                ELSE 5 
            END
    ");
    
    $matches = [];
    while ($row = $stmt->fetch()) {
        $matches[] = [
            'id' => $row['id'],
            'round' => $row['round'],
            'player1' => [
                'id' => $row['p1_id'],
                'name' => $row['p1_name'],
                'photo' => $row['p1_photo'],
                'ranking' => $row['p1_ranking'],
                'nationality' => $row['p1_nationality'],
                'handedness' => $row['p1_handedness']
            ],
            'player2' => [
                'id' => $row['p2_id'],
                'name' => $row['p2_name'],
                'photo' => $row['p2_photo'],
                'ranking' => $row['p2_ranking'],
                'nationality' => $row['p2_nationality'],
                'handedness' => $row['p2_handedness']
            ],
            'date' => $row['match_date'],
            'court' => $row['court'],
            'status' => $row['status'],
            'winner' => $row['winner_id'] ? [
                'id' => $row['winner_id'],
                'name' => $row['winner_name']
            ] : null,
            'score' => $row['score']
        ];
    }
    
    jsonResponse(['success' => true, 'matches' => $matches]);
}

function getMatch($id) {
    $db = getDB();
    
    $stmt = $db->prepare("
        SELECT m.*, 
            p1.id as p1_id, p1.name as p1_name, p1.photo_url as p1_photo, p1.ranking as p1_ranking,
            p1.nationality as p1_nationality, p1.handedness as p1_handedness,
            p2.id as p2_id, p2.name as p2_name, p2.photo_url as p2_photo, p2.ranking as p2_ranking,
            p2.nationality as p2_nationality, p2.handedness as p2_handedness,
            pw.name as winner_name
        FROM matches m
        JOIN players p1 ON m.player1_id = p1.id
        JOIN players p2 ON m.player2_id = p2.id
        LEFT JOIN players pw ON m.winner_id = pw.id
        WHERE m.id = ?
    ");
    $stmt->execute([$id]);
    $row = $stmt->fetch();
    
    if (!$row) {
        jsonResponse(['error' => 'Match non trouvé'], 404);
    }
    
    $match = [
        'id' => $row['id'],
        'round' => $row['round'],
        'player1' => [
            'id' => $row['p1_id'],
            'name' => $row['p1_name'],
            'photo' => $row['p1_photo'],
            'ranking' => $row['p1_ranking'],
            'nationality' => $row['p1_nationality'],
            'handedness' => $row['p1_handedness']
        ],
        'player2' => [
            'id' => $row['p2_id'],
            'name' => $row['p2_name'],
            'photo' => $row['p2_photo'],
            'ranking' => $row['p2_ranking'],
            'nationality' => $row['p2_nationality'],
            'handedness' => $row['p2_handedness']
        ],
        'date' => $row['match_date'],
        'court' => $row['court'],
        'status' => $row['status'],
        'winner' => $row['winner_id'] ? [
            'id' => $row['winner_id'],
            'name' => $row['winner_name']
        ] : null,
        'score' => $row['score']
    ];
    
    jsonResponse(['success' => true, 'match' => $match]);
}

function addMatch() {
    $data = getJsonInput();
    
    $required = ['round', 'player1_id', 'player2_id', 'match_date'];
    foreach ($required as $field) {
        if (!isset($data[$field])) {
            jsonResponse(['error' => "Le champ $field est requis"], 400);
        }
    }
    
    $db = getDB();
    
    // Vérifier que les joueurs existent
    $stmt = $db->prepare("SELECT id FROM players WHERE id IN (?, ?)");
    $stmt->execute([$data['player1_id'], $data['player2_id']]);
    if ($stmt->rowCount() !== 2) {
        jsonResponse(['error' => 'Un ou les deux joueurs n\'existent pas'], 404);
    }
    
    $stmt = $db->prepare("
        INSERT INTO matches (round, player1_id, player2_id, match_date, court, status) 
        VALUES (?, ?, ?, ?, ?, 'upcoming')
    ");
    
    $stmt->execute([
        $data['round'],
        $data['player1_id'],
        $data['player2_id'],
        $data['match_date'],
        $data['court'] ?? null
    ]);
    
    jsonResponse(['success' => true, 'message' => 'Match ajouté avec succès', 'match_id' => $db->lastInsertId()]);
}

function updateMatch($id) {
    $data = getJsonInput();
    $db = getDB();
    
    $stmt = $db->prepare("SELECT id, status FROM matches WHERE id = ?");
    $stmt->execute([$id]);
    $match = $stmt->fetch();
    
    if (!$match) {
        jsonResponse(['error' => 'Match non trouvé'], 404);
    }
    
    $fields = [];
    $values = [];
    
    $allowedFields = ['round', 'player1_id', 'player2_id', 'match_date', 'court', 'status', 'winner_id', 'score'];
    
    foreach ($allowedFields as $field) {
        if (isset($data[$field])) {
            $fields[] = "$field = ?";
            $values[] = $data[$field];
        }
    }
    
    if (empty($fields)) {
        jsonResponse(['error' => 'Aucune donnée à mettre à jour'], 400);
    }
    
    $values[] = $id;
    $stmt = $db->prepare("UPDATE matches SET " . implode(', ', $fields) . " WHERE id = ?");
    $stmt->execute($values);
    
    jsonResponse(['success' => true, 'message' => 'Match mis à jour avec succès']);
}

function deleteMatch($id) {
    $db = getDB();
    
    $stmt = $db->prepare("DELETE FROM matches WHERE id = ?");
    $stmt->execute([$id]);
    
    if ($stmt->rowCount() === 0) {
        jsonResponse(['error' => 'Match non trouvé'], 404);
    }
    
    jsonResponse(['success' => true, 'message' => 'Match supprimé avec succès']);
}
?>