package cli

import (
	"os"
	"strings"
	"time"

	"sneak.berlin/go/vaultik/internal/globals"
	"sneak.berlin/go/vaultik/internal/ui"
)

// CLIEntry is the main entry point for the CLI application.
// It prints the startup banner (unless a quiet flag is present in os.Args),
// executes the root cobra command, and routes any returned error through
// the ui.Writer so the user sees a properly formatted "🛑 ERROR:" line.
func CLIEntry() {
	if !bannerSuppressedInArgs(os.Args[1:]) {
		short := globals.Commit
		if len(short) > 12 {
			short = short[:12]
		}
		writeStartupBanner(ui.New(os.Stdout), time.Now().UTC(), short)
	}

	rootCmd := NewRootCommand()
	rootCmd.SilenceErrors = true

	if err := rootCmd.Execute(); err != nil {
		ReportError("%s", err.Error())
		os.Exit(1)
	}
}

// ReportError emits a user-facing error to stderr in the standard
// 🛑 ERROR: format. Use it from goroutine error paths (where returning
// an error to cobra isn't an option) and anywhere else a CLI command
// must surface a failure outside the normal RunE return path.
func ReportError(format string, args ...any) {
	ui.New(os.Stderr).Error(format, args...)
}

// bannerSuppressedInArgs reports whether any of args is a flag that
// should suppress the startup banner (--quiet/-q/--cron). Stops at the
// "--" argument terminator. Recognizes both long forms and short -q,
// including combined short flags like "-qv".
func bannerSuppressedInArgs(args []string) bool {
	for _, a := range args {
		if a == "--" {
			return false
		}
		switch a {
		case "--quiet", "-q", "--cron":
			return true
		}
		if strings.HasPrefix(a, "--quiet=") || strings.HasPrefix(a, "--cron=") {
			return true
		}
		// Combined short flags like -qv or -vq.
		if len(a) > 1 && a[0] == '-' && a[1] != '-' {
			for _, c := range a[1:] {
				if c == 'q' {
					return true
				}
			}
		}
	}
	return false
}