<?php
session_start();
require_once 'db/config.php';

if (!isset($_SESSION['user_id']) || $_SESSION['user_role'] !== 'coach') {
    header('Location: login.php');
    exit;
}

if (!isset($_GET['id'])) {
    header('Location: dashboard.php?status=error&message=Invalid+request');
    exit;
}

$availability_id = $_GET['id'];
$coach_id = $_SESSION['user_id'];

try {
    // Verify the availability slot belongs to the coach
    $stmt = db()->prepare("SELECT * FROM coach_availability WHERE id = ? AND coach_id = ?");
    $stmt->execute([$availability_id, $coach_id]);
    $availability = $stmt->fetch();

    if (!$availability) {
        header('Location: dashboard.php?status=error&message=Availability+not+found');
        exit;
    }

    // Delete the availability slot
    $delete_stmt = db()->prepare("DELETE FROM coach_availability WHERE id = ?");
    $delete_stmt->execute([$availability_id]);

    header('Location: dashboard.php?status=success&message=Availability+deleted+successfully');
    exit;
} catch (PDOException $e) {
    error_log('Error deleting availability: ' . $e->getMessage());
    header('Location: dashboard.php?status=error&message=Could+not+delete+availability');
    exit;
}