// Copyright 2024 WIT.COM Inc Licensed GPL 3.0

package main

import (
	"errors"
	"fmt"

	"go.wit.com/log"
	"libvirt.org/go/libvirtxml"
)

func addDomainDroplet(domcfg *libvirtxml.Domain) (*DropletT, error) {
	if domcfg == nil {
		return nil, errors.New("domcfg == nil")
	}

	d, _ := findDomain(domcfg)
	if d != nil {
		return d, errors.New(d.pb.Hostname + " droplet exists. need to update instead")
	}

	log.Info("ADD FAILED", domcfg.Name, domcfg.UUID)
	return nil, errors.New("not found")
}

func findDomain(domcfg *libvirtxml.Domain) (*DropletT, error) {
	var found *DropletT
	if domcfg == nil {
		return nil, errors.New("domcfg == nil")
	}

	for _, d := range me.droplets {
		if d.pb.Hostname == domcfg.Name {
			if d.pb.Uuid != domcfg.UUID {
				fmt.Println("CHANGED UUID", d.pb.Uuid, domcfg.UUID)
				d.pb.Uuid = domcfg.UUID
				me.changed = true
			}
			if found == nil {
				found = d
			} else {
				fmt.Println("FOUND TWICE", d.pb.Uuid, domcfg.Name, domcfg.UUID)
				return d, errors.New("Found Twice")
			}

		}
		if d.pb.Uuid == domcfg.UUID {
			if d.pb.Hostname != domcfg.Name {
				fmt.Println("FOUND UUID WITH MIS-MATCHED NAME", domcfg.Name, domcfg.UUID)
				return d, errors.New("UUID with mis-matched names")
			}
		}
	}

	return found, nil
}

func updateDroplet(d *DropletT, domcfg *libvirtxml.Domain) bool {
	var ok bool = true

	if d == nil {
		return false
	}
	if domcfg == nil {
		return false
	}

	if updateMemory(d, domcfg) {
		// updateMemory failed
		ok = false
	}

	// check cpus
	if d.pb.Cpus != int64(domcfg.VCPU.Value) {
		fmt.Printf("cpus changed. VCPU = %+v\n", domcfg.VCPU)
		d.pb.Cpus = int64(domcfg.VCPU.Value)
		me.changed = true
	}

	// check type
	if domcfg.Type != "kvm" {
		fmt.Printf("not kvm. Virt type == %s\n", domcfg.Type)
		ok = false
	}

	if updateNetwork(d, domcfg) {
		// updateNetwork failed
		ok = false
	}
	return ok
}

func updateMemory(d *DropletT, domcfg *libvirtxml.Domain) bool {
	if (d == nil) || (domcfg == nil) {
		return false
	}

	// check memory
	if domcfg.Memory.Unit == "KiB" {
		var m int64
		m = int64(domcfg.Memory.Value * 1024)
		if d.pb.Memory != m {
			d.pb.Memory = m
			me.changed = true
			fmt.Printf("Memory changed %d, %d %s\n", d.pb.Memory, domcfg.Memory.Value, domcfg.Memory.Unit)
			return true
		}
		return false
	}
	fmt.Println("Unknown Memory Unit", domcfg.Memory.Unit)
	return true
}

func updateNetwork(d *DropletT, domcfg *libvirtxml.Domain) bool {
	if (d == nil) || (domcfg == nil) {
		return false
	}

	var macs []string
	// Iterate over the network interfaces and print the MAC addresses
	for _, iface := range domcfg.Devices.Interfaces {
		if iface.MAC != nil {
			// iface.MAC.Address = "aa:bb:aa:bb:aa:ff"
			// fmt.Printf("MAC Address: %+v\n", iface.MAC)
			// fmt.Printf("Interface: %s, MAC Address: %s\n", iface.Target.Dev, iface.MAC.Address)
			macs = append(macs, iface.MAC.Address)
		} else {
			fmt.Printf("Interface: %s, MAC Address: not available\n", iface.Target.Dev)
		}
	}

	// for _, iface := range domcfg.Devices.Interfaces {

	log.Info("mac addrs:", macs)
	return false
}