<?php
header('Content-Type: application/json');
require_once 'db/config.php';

$data = json_decode(file_get_contents('php://input'), true);
$content = $data['content'] ?? '';
$channel_id = (int)($data['channel_id'] ?? 1);
$user_id = 1; // Mock logged in user

if (empty($content)) {
    echo json_encode(['success' => false, 'error' => 'Empty content']);
    exit;
}

try {
    $stmt = db()->prepare("INSERT INTO messages (channel_id, user_id, content) VALUES (?, ?, ?)");
    $stmt->execute([$channel_id, $user_id, $content]);
    $last_id = db()->lastInsertId();

    // Fetch message with username for the response
    $stmt = db()->prepare("SELECT m.*, u.username FROM messages m JOIN users u ON m.user_id = u.id WHERE m.id = ?");
    $stmt->execute([$last_id]);
    $msg = $stmt->fetch();

    echo json_encode([
        'success' => true,
        'message' => [
            'username' => $msg['username'],
            'content' => htmlspecialchars($msg['content']),
            'time' => date('H:i', strtotime($msg['created_at']))
        ]
    ]);
} catch (Exception $e) {
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}