<?php
require_once __DIR__ . '/../db/config.php';

session_start();
header('Content-Type: application/json');

if (!isset($_SESSION['user_id'])) {
    http_response_code(401);
    echo json_encode(['status' => 'error', 'message' => 'You must be logged in to add favorites.']);
    exit;
}

$userId = $_SESSION['user_id'];
$playerData = json_decode(file_get_contents('php://input'), true);

if (!$playerData || !isset($playerData['idPlayer'])) {
    http_response_code(400);
    echo json_encode(['status' => 'error', 'message' => 'Invalid player data.']);
    exit;
}

$playerId = $playerData['idPlayer'];

try {
    $pdo = db();
    $pdo->beginTransaction();

    // 1. Insert/update player in the main players table
    $stmt = $pdo->prepare(
        'INSERT INTO players (id, name, team, sport, image_url) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE name = VALUES(name);'
    );
    $stmt->execute([
        $playerId,
        $playerData['strPlayer'],
        $playerData['strTeam'],
        $playerData['strSport'],
        $playerData['strCutout']
    ]);

    // 2. Add to user_favorites (ignore if already exists)
    $stmt = $pdo->prepare('INSERT IGNORE INTO user_favorites (user_id, player_id) VALUES (?, ?)');
    $stmt->execute([$userId, $playerId]);

    // 3. Increment the popular player count
    $stmt = $pdo->prepare(
        'INSERT INTO player_favorites (player_id, favorite_count) VALUES (?, 1) ON DUPLICATE KEY UPDATE favorite_count = favorite_count + 1;'
    );
    $stmt->execute([$playerId]);

    $pdo->commit();

    echo json_encode(['status' => 'success', 'message' => 'Player added to favorites.']);

} catch (PDOException $e) {
    $pdo->rollBack();
    http_response_code(500);
    echo json_encode(['status' => 'error', 'message' => 'Database error: ' . $e->getMessage()]);
}