package vpn

import "debtik/internal/aerotun"

type Manager struct {
	PPPoE     *PPPoEManager
	WireGuard *WireGuardManager
	PPTP      *PPTPManager
	L2TP      *L2TPManager
	IPSec     *IPSecManager
	EoIP      *EoIPManager
	PPPServer *PPPServerManager
	AeroTUN   *aerotun.Manager
}

func NewManager() *Manager {
	pppServer := NewPPPServerManager()
	l2tpMgr := NewL2TPManager()
	l2tpMgr.SetPPPServer(pppServer)
	pptpMgr := NewPPTPManager()
	pptpMgr.SetPPPServer(pppServer)

	return &Manager{
		PPPoE:     NewPPPoEManager(),
		WireGuard: NewWireGuardManager(),
		PPTP:      pptpMgr,
		L2TP:      l2tpMgr,
		IPSec:     NewIPSecManager(),
		EoIP:      NewEoIPManager(),
		PPPServer: pppServer,
		AeroTUN:   aerotun.NewManager(),
	}
}

// GetOverallStatus returns a summary of all active instances across all protocols.
func (m *Manager) GetOverallStatus() OverallVPNStatus {
	pppoeList := m.PPPoE.List()
	wgIfaces := m.WireGuard.ListInterfaces()
	wgPeers := m.WireGuard.ListPeers("")
	pptpList := m.PPTP.List()
	l2tpList := m.L2TP.List()
	ipsecList := m.IPSec.List()
	eoipList := m.EoIP.List()

	activePPPoE := 0
	for _, p := range pppoeList {
		if p.Running {
			activePPPoE++
		}
	}

	activeWG := 0
	for _, w := range wgIfaces {
		if w.Running {
			activeWG++
		}
	}

	activePPTP := 0
	for _, p := range pptpList {
		if p.Running {
			activePPTP++
		}
	}

	activeL2TP := 0
	for _, l := range l2tpList {
		if l.Running {
			activeL2TP++
		}
	}

	activeIPSec := 0
	for _, i := range ipsecList {
		if i.Running {
			activeIPSec++
		}
	}

	activeEoIP := 0
	for _, e := range eoipList {
		if e.Running {
			activeEoIP++
		}
	}

	aeroStats := m.AeroTUN.GetSummaryStats()

	pppoeSrv := m.PPPServer.GetPPPoEServer()
	pptpSrv := m.PPPServer.GetPPTPServer()
	l2tpSrv := m.PPPServer.GetL2TPServer()
	ipsecSrv := m.PPPServer.GetIPSecServer()
	pppSessions := len(m.PPPServer.ListActiveSessions())

	totalActive := activePPPoE + activeWG + activePPTP + activeL2TP + activeIPSec + activeEoIP + aeroStats.ActiveTunnels + pppSessions

	return OverallVPNStatus{
		TotalPPPoE:          len(pppoeList),
		ActivePPPoE:         activePPPoE,
		TotalWireGuard:      len(wgIfaces),
		ActiveWireGuard:     activeWG,
		TotalWireGuardPeers: len(wgPeers),
		TotalPPTP:           len(pptpList),
		ActivePPTP:          activePPTP,
		TotalL2TP:           len(l2tpList),
		ActiveL2TP:          activeL2TP,
		TotalIPSec:          len(ipsecList),
		ActiveIPSec:         activeIPSec,
		TotalEoIP:           len(eoipList),
		ActiveEoIP:          activeEoIP,
		TotalAeroTUN:        aeroStats.TotalTunnels,
		ActiveAeroTUN:       aeroStats.ActiveTunnels,
		AeroTUNSavedBytes:   aeroStats.TotalSavedBytes,
		AeroTUNRatio:        aeroStats.AverageRatio,
		TotalPPPSessions:    pppSessions,
		PPPoEServerRunning:  pppoeSrv.Running,
		PPTPServerRunning:   pptpSrv.Running,
		L2TPServerRunning:   l2tpSrv.Running,
		IPSecServerRunning:  ipsecSrv.Running,
		TotalActiveTunnels:  totalActive,
	}
}

// RenameInterface updates VPN client interface references when an interface is renamed.
func (m *Manager) RenameInterface(oldName, newName string) {
	if m.PPPoE != nil {
		m.PPPoE.RenameInterface(oldName, newName)
	}
}