package cli

import (
	"context"
	"fmt"
	"os"

	"github.com/urfave/cli/v3"
)

// BuildInfo carries version metadata baked in at build time via -ldflags
// (see the Makefile's LDFLAGS/PRERELEASE variables and the release Gitea
// Actions workflow, which sets PRERELEASE from the triggering release's
// "prerelease" flag). Root stores the value it was given so versionCommand
// and internal/ui's footer (via Build) can read it back without threading
// it through every call site.
type BuildInfo struct {
	Version    string // git tag (or "dev" for untagged/local builds)
	Commit     string
	Date       string
	Prerelease bool
}

var build BuildInfo

// Build returns the BuildInfo Root was constructed with.
func Build() BuildInfo { return build }

// String renders "1.2.3 (commit abc1234, built 2026-08-14T12:00:00Z)",
// appending " [prerelease]" when the triggering Gitea release was marked
// as a prerelease.
func (b BuildInfo) String() string {
	s := fmt.Sprintf("%s (commit %s, built %s)", valueOr(b.Version, "dev"), valueOr(b.Commit, "none"), valueOr(b.Date, "unknown"))
	if b.Prerelease {
		s += " [prerelease]"
	}
	return s
}

// versionCommand prints build metadata. Unlike every other command it does
// not touch a.Client/a.Store — see bootstrap's leaf-skip check, which keeps
// `vault-tui version` from tripping the first-run config wizard.
func versionCommand() *cli.Command {
	return &cli.Command{
		Name:  "version",
		Usage: "print version, commit, build date, and prerelease status",
		Flags: []cli.Flag{
			&cli.BoolFlag{Name: "json"},
		},
		Action: func(ctx context.Context, cmd *cli.Command) error {
			b := Build()
			if cmd.Bool("json") {
				return printJSON(os.Stdout, map[string]any{
					"version":    b.Version,
					"commit":     b.Commit,
					"date":       b.Date,
					"prerelease": b.Prerelease,
				})
			}
			fmt.Println(b.String())
			return nil
		},
	}
}