// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
// SPDX-License-Identifier: BSD-3-Clause

//go:build linux && loong64

package debug

import "fmt"

// WatchpointType selects what triggers the watchpoint.
type WatchpointType int

const (
	WatchWrite WatchpointType = 1
	WatchRead  WatchpointType = 3
)

// wpSlots tracks watchpoint slot occupancy.
var wpSlots [4]bool

func (s *Session) FindFreeWatchpointSlot() int {
	for i := 0; i < 4; i++ {
		if !wpSlots[i] {
			return i
		}
	}
	return -1
}

func (s *Session) IsWatchpointSlotUsed(slot int) bool {
	if slot < 0 || slot > 3 {
		return false
	}
	return wpSlots[slot]
}

func (s *Session) SetWatchpoint(slot int, addr uint64, typ WatchpointType, size int) error {
	return fmt.Errorf("debug: hardware watchpoints not yet implemented for loong64")
}

func (s *Session) ClearWatchpoint(slot int) error {
	return fmt.Errorf("debug: hardware watchpoints not yet implemented for loong64")
}

func (s *Session) ClearAllWatchpoints() error {
	return nil
}