package zones

import (
	"fmt"
	"io/fs"
	"net/netip"
	"path/filepath"
	"strconv"
	"strings"
	"sync"
)

// A Machine is a machine on a Zone
type Machine struct {
	mu sync.Mutex

	zone *Zone
	id   int
	Name string `toml:"name"`

	PublicAddresses []netip.Addr `toml:"public,omitempty"`
	RingAddresses   []*RingInfo  `toml:"rings,omitempty"`
}

func (m *Machine) String() string {
	return m.Name
}

// ID return the index within the [Zone] associated to this [Machine]
func (m *Machine) ID() int {
	m.mu.Lock()
	defer m.mu.Unlock()

	if m.id == 0 {
		zoneName := m.zone.Name

		s := m.Name[len(zoneName)+1:]

		id, err := strconv.ParseInt(s, 10, 8)
		if err != nil {
			panic(err)
		}

		m.id = int(id)
	}

	return m.id
}

// FullName returns the Name of the machine including domain name
func (m *Machine) FullName() string {
	if domain := m.zone.zones.domain; domain != "" {
		var s = []string{
			m.Name,
			domain,
		}

		return strings.Join(s, ".")
	}

	return m.Name
}

// ReadFile reads a file from the machine's config directory
func (m *Machine) ReadFile(name string, args ...any) ([]byte, error) {
	base := m.zone.zones.dir
	fullName := m.getFilename(name, args...)

	return fs.ReadFile(base, fullName)
}

func (m *Machine) getFilename(name string, args ...any) string {
	if len(args) > 0 {
		name = fmt.Sprintf(name, args...)
	}

	s := []string{
		m.zone.Name,
		m.Name,
		name,
	}

	return filepath.Join(s...)
}

func (m *Machine) getPeerByName(name string) (*Machine, bool) {
	return m.zone.zones.GetMachineByName(name)
}