package store

import "strings"

// Satisfies reports whether this machine can take a job that asked for these labels.
func (r Runner) Satisfies(want []string) bool {
	// A job that asks for nothing runs anywhere, which is what [build] command has always done.
	if len(want) == 0 {
		return true
	}
	for _, label := range want {
		if !r.has(label) {
			return false
		}
	}
	return true
}

// has answers one label, translating GitHub's hosted names into what a runner reports about itself.
func (r Runner) has(label string) bool {
	label = strings.ToLower(strings.TrimSpace(label))
	// Every barerepo runner is self-hosted, so the label that says so is always true here.
	if label == "self-hosted" {
		return true
	}
	for _, own := range r.Labels {
		if strings.EqualFold(strings.TrimSpace(own), label) {
			return true
		}
	}
	if os, ok := hostedOS(label); ok {
		return strings.EqualFold(r.OS, os)
	}
	return strings.EqualFold(r.OS, label) || strings.EqualFold(r.Arch, label)
}

// hostedOS maps GitHub's runner images to an operating system, which is all barerepo can check.
func hostedOS(label string) (string, bool) {
	switch {
	case strings.HasPrefix(label, "ubuntu-"), label == "ubuntu",
		strings.HasPrefix(label, "linux-"), label == "linux":
		return "linux", true
	case strings.HasPrefix(label, "macos-"), label == "macos", label == "darwin":
		return "darwin", true
	case strings.HasPrefix(label, "windows-"), label == "windows":
		return "windows", true
	}
	return "", false
}