package updateprotocol

import (
	"regexp"
	"time"
)

var releaseVersionPattern = regexp.MustCompile(`^v(?:0|[1-9][0-9]*)\.(?:0|[1-9][0-9]*)\.(?:0|[1-9][0-9]*)$`)

const (
	PhaseIdle       = "idle"
	PhaseQueued     = "queued"
	PhasePulling    = "pulling"
	PhaseRestarting = "restarting"
	PhaseVerifying  = "verifying"
	PhaseComplete   = "complete"
	PhaseFailed     = "failed"
)

type Request struct {
	Version          string `json:"version"`
	RegistryUsername string `json:"registry_username"`
	RegistryToken    string `json:"registry_token"`
}

type Status struct {
	Phase         string    `json:"phase"`
	TargetVersion string    `json:"target_version,omitempty"`
	Message       string    `json:"message,omitempty"`
	StartedAt     time.Time `json:"started_at,omitempty"`
	UpdatedAt     time.Time `json:"updated_at,omitempty"`
}

func (s Status) Busy() bool {
	return s.Phase == PhaseQueued || s.Phase == PhasePulling || s.Phase == PhaseRestarting || s.Phase == PhaseVerifying
}

func ValidVersion(version string) bool {
	return len(version) <= 64 && releaseVersionPattern.MatchString(version)
}