import Foundation

enum AppDiagnosticsService {
    /// Current physical memory footprint in MB, or nil on failure.
    /// Uses task_vm_info.phys_footprint — the same metric jetsam uses.
    static func currentFootprintMB() -> Int? {
        var info = task_vm_info_data_t()
        var count = mach_msg_type_number_t(
            MemoryLayout<task_vm_info_data_t>.size / MemoryLayout<natural_t>.size
        )
        let result: kern_return_t = withUnsafeMutablePointer(to: &info) { pointer in
            pointer.withMemoryRebound(to: integer_t.self, capacity: Int(count)) { rebound in
                task_info(mach_task_self_, task_flavor_t(TASK_VM_INFO), rebound, &count)
            }
        }
        guard result == KERN_SUCCESS else { return nil }
        return Int(info.phys_footprint / 1_048_576)
    }
}