// Package buildinfo exposes the RelSpec version and build date so that both the
// CLI and the schema writers can stamp generated output with the same values.
package buildinfo

import (
	"fmt"
	"runtime/debug"
	"time"
)

// Version and BuildDate are set via -ldflags at build time (see Makefile). When
// built without ldflags they are backfilled from the Go module build info.
var (
	Version   = "dev"
	BuildDate = "unknown"
)

func init() {
	if Version != "dev" {
		return
	}
	info, ok := debug.ReadBuildInfo()
	if !ok {
		return
	}
	var rev, vcsTime string
	for _, s := range info.Settings {
		switch s.Key {
		case "vcs.revision":
			if len(s.Value) >= 7 {
				rev = s.Value[:7]
			}
		case "vcs.time":
			vcsTime = s.Value
		}
	}
	if rev != "" {
		Version = rev
	}
	if t, err := time.Parse(time.RFC3339, vcsTime); err == nil {
		BuildDate = t.UTC().Format("2006-01-02 15:04:05 UTC")
	}
}

// GeneratedComment returns the one-line provenance string embedded in generated
// files, e.g. "RelSpec dev (built: unknown)".
func GeneratedComment() string {
	return fmt.Sprintf("RelSpec %s (built: %s)", Version, BuildDate)
}

const AsciiLogo = `
██████╗ ███████╗██╗     ███████╗██████╗ ███████╗ ██████╗
██╔══██╗██╔════╝██║     ██╔════╝██╔══██╗██╔════╝██╔════╝
██████╔╝█████╗  ██║     ███████╗██████╔╝█████╗  ██║
██╔══██╗██╔══╝  ██║     ╚════██║██╔═══╝ ██╔══╝  ██║
██║  ██║███████╗███████╗███████║██║     ███████╗╚██████╗
╚═╝  ╚═╝╚══════╝╚══════╝╚══════╝╚═╝     ╚══════╝ ╚═════╝
[ IN ] ──▶ [ RELSPEC ] ──▶ [ OUT ]
╔══════════════════════════════════════╗
║                                      ║
║   © WARKY DEVS                       ║
║   Author: Hein (hein@warky.dev)      ║
║                                      ║
╚══════════════════════════════════════╝
`