package launcher

import (
	"fmt"
	"os"
	"runtime/debug"
	"strings"

	"code.nochebuena.dev/einherjar/contracts/observability"
)

func printBanner(identifiables []observability.Identifiable) {
	v := strings.ToLower(os.Getenv("EINHERJAR_BANNER"))
	if v == "off" || v == "false" {
		return
	}
	fmt.Fprintf(os.Stdout, bannerText, coreVersion())
	for _, id := range identifiables {
		path := strings.TrimPrefix(id.ModulePath(), "code.nochebuena.dev/")
		fmt.Fprintf(os.Stdout, "  · %-25s %s\n", path, id.ModuleVersion())
	}
	if len(identifiables) > 0 {
		fmt.Fprintln(os.Stdout)
	}
}

func coreVersion() string {
	const path = "code.nochebuena.dev/einherjar/core"
	if info, ok := debug.ReadBuildInfo(); ok {
		for _, dep := range info.Deps {
			if dep.Path == path {
				return dep.Version
			}
		}
		if info.Main.Path == path {
			return info.Main.Version
		}
	}
	return "(devel)"
}

const bannerText = `
  ███████╗██╗███╗   ██╗██╗  ██╗███████╗██████╗      ██╗ █████╗ ██████╗
  ██╔════╝██║████╗  ██║██║  ██║██╔════╝██╔══██╗     ██║██╔══██╗██╔══██╗
  █████╗  ██║██╔██╗ ██║███████║█████╗  ██████╔╝     ██║███████║██████╔╝
  ██╔══╝  ██║██║╚██╗██║██╔══██║██╔══╝  ██╔══██╗██   ██║██╔══██║██╔══██╗
  ███████╗██║██║ ╚████║██║  ██║███████╗██║  ██║╚█████╔╝██║  ██║██║  ██║
  ╚══════╝╚═╝╚═╝  ╚═══╝╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝ ╚════╝ ╚═╝  ╚═╝╚═╝  ╚═╝
  code.nochebuena.dev/einherjar  ·  Chosen warriors. Not for themselves.  ·  %s

`