package main

import "fmt"

// The nearest-region CLI strings (spec §19 and this plan's additions), as
// approved in the nearest-region copy record. Change none of them without a
// new copy review.

// regionCreatedLine is C9 to C12, by source word; anything else reads as the
// default.
func regionCreatedLine(place, source string) string {
	switch source {
	case "timezone":
		return fmt.Sprintf("Region: %s (from your timezone). Use --region to choose another.", place)
	case "ip":
		return fmt.Sprintf("Region: %s (from your network location). Use --region to choose another.", place)
	case "chosen":
		return fmt.Sprintf("Region: %s.", place)
	}
	return fmt.Sprintf("Region: %s (the platform default). Use --region to choose another.", place)
}

// regionNotRecordedOldConsole is C13a.
const regionNotRecordedOldConsole = "This console does not record an app region yet, so --region was not applied."

// regionNotAppliedSwitchOff is C13b.
func regionNotAppliedSwitchOff(place string) string {
	return fmt.Sprintf("This console is not assigning app regions yet, so --region was not applied. This app's instances start in %s.", place)
}

// instanceCreatedSuffix is C14: the parenthesis content of
// "created instance {host} (...)".
func instanceCreatedSuffix(channel, place string) string {
	return fmt.Sprintf("channel %s, %s", channel, place)
}

// deployRegionMismatch is C15, or C15.nohome when the console has no named
// home region to put in the place.
func deployRegionMismatch(app, place string) string {
	if place == "" {
		return fmt.Sprintf("%s already runs in the home region. --region only applies when deploy creates an app. To place one instance elsewhere, use carlos instances create --region.", app)
	}
	return fmt.Sprintf("%s already runs in %s. --region only applies when deploy creates an app. To place one instance elsewhere, use carlos instances create --region.", app, place)
}

// deployRegionUnreadable is C15b: deploy stops when it cannot read the app's
// region.
func deployRegionUnreadable(app string, err error) string {
	return fmt.Sprintf("could not read %s's region (%v), so deploy stopped before shipping anything. Try again, or run without --region.", app, err)
}

// deployRegionUnknown is C15c: the console answered, but could not read the
// app's region.
func deployRegionUnknown(app string) string {
	return fmt.Sprintf("the console could not read %s's region, so deploy stopped before shipping anything. Try again, or run without --region.", app)
}

// canaryRegionMismatch is C25, or C25.nohome when the console has no named
// home region to put in the place.
func canaryRegionMismatch(host, place string) string {
	if place == "" {
		return fmt.Sprintf("canary %s already runs in the home region. --region applies only when canary creates the host. Run carlos canary rm first to start it somewhere else.", host)
	}
	return fmt.Sprintf("canary %s already runs in %s. --region applies only when canary creates the host. Run carlos canary rm first to start it somewhere else.", host, place)
}

// canaryRegionOnFleet is C30.
func canaryRegionOnFleet(app, fleet string) string {
	return fmt.Sprintf("%s runs on your fleet %s, which decides where every instance runs, so --region does not apply. Run the command without --region.", app, fleet)
}

// canaryFleetUnknown is C30b: an older console cannot say whether a fleet
// governs.
func canaryFleetUnknown(app string) string {
	return fmt.Sprintf("this console can't say where %s's instances run, so --region can't be checked. Update the console, or run the command without --region.", app)
}

// canaryRegionUnconfirmed is C30c: the canary's own record could not be read,
// so whether it already runs elsewhere is unknown.
func canaryRegionUnconfirmed(name string) string {
	return fmt.Sprintf("could not confirm where canary %s runs, so nothing was changed. Try again, or run the command without --region.", name)
}

// C22a to C22d: flag help.
const (
	flagRegionAppsCreate      = "region this app's instances start in (default: the region nearest you)"
	flagRegionDeploy          = "region for the app this deploy creates (default: the region nearest you)"
	flagRegionCanary          = "region for the canary instance (default: the app's region)"
	flagRegionInstancesCreate = "region for this instance (default: the app's region, subject to the manifest's allow-list)"
)