package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"github.com/spf13/cobra"

	"gitea.oblak.solutions/dimitar/gitFlow/internal/version"
)

// newRootCmd builds the top-level gitflow command.
func newRootCmd() *cobra.Command {
	root := &cobra.Command{
		Use:   "gitflow",
		Short: "Scan Git repositories and get suggested next steps",
		Long: `gitflow discovers every Git repository under a parent directory,
scans each one's status, and presents the findings. It can rescan on a
schedule and, when enabled, uses an AI agent to suggest next actions for
repositories that need attention.`,
		SilenceUsage:  true,
		SilenceErrors: true,
	}
	root.AddCommand(
		newScanCmd(),
		newWatchCmd(),
		newConfigCmd(),
		newVersionCmd(),
		newCompletionCmd(root),
	)
	return root
}

// newCompletionCmd generates shell completion scripts for the root command.
func newCompletionCmd(root *cobra.Command) *cobra.Command {
	return &cobra.Command{
		Use:   "completion [bash|zsh|fish|powershell]",
		Short: "Generate a shell completion script",
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			switch args[0] {
			case "bash":
				return root.GenBashCompletion(os.Stdout)
			case "zsh":
				return root.GenZshCompletion(os.Stdout)
			case "fish":
				return root.GenFishCompletion(os.Stdout, true)
			case "powershell":
				return root.GenPowerShellCompletion(os.Stdout)
			default:
				return fmt.Errorf("unknown shell %q (want bash, zsh, fish, or powershell)", args[0])
			}
		},
	}
}

// signalContext returns a context that is cancelled on SIGINT/SIGTERM so
// scans and watch loops shut down gracefully.
func signalContext() (context.Context, context.CancelFunc) {
	return signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
}

// newVersionCmd prints the build version.
func newVersionCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "version",
		Short: "Print version information",
		Args:  cobra.NoArgs,
		RunE: func(cmd *cobra.Command, _ []string) error {
			fmt.Printf("gitflow %s\n", version.Version)
			return nil
		},
	}
}