package commands

import (
	"fmt"
	"os"

	"github.com/MichaelMure/git-bug/bug"
	"github.com/MichaelMure/git-bug/repository"
	"github.com/spf13/cobra"
)

const rootCommandName = "git-bug"

// package scoped var to hold the repo after the PreRun execution
var repo repository.Repo

// RootCmd represents the base command when called without any subcommands
var RootCmd = &cobra.Command{
	Version: "0.2.0",

	Use:   rootCommandName,
	Short: "A bugtracker embedded in Git",
	Long: `git-bug is a bugtracker embedded in git.

It use the same internal storage so it doesn't pollute your project. As you would do with commits and branches, you can push your bugs to the same git remote your are already using to collaborate with other peoples.`,

	// For the root command, force the execution of the PreRun
	// even if we just display the help. This is to make sure that we check
	// the repository and give the user early feedback.
	Run: func(cmd *cobra.Command, args []string) {
		if err := cmd.Help(); err != nil {
			os.Exit(1)
		}
	},

	// Load the repo before any command execution
	// Note, this concern only commands that actually have a Run function
	PersistentPreRunE: loadRepo,

	DisableAutoGenTag: true,

	// Custom bash code to connect the git completion for "git bug" to the
	// git-bug completion for "git-bug"
	BashCompletionFunction: `
_git_bug() {
    __start_git-bug "$@"
}
`,
}

func Execute() {
	if err := RootCmd.Execute(); err != nil {
		os.Exit(1)
	}
}

func loadRepo(cmd *cobra.Command, args []string) error {
	cwd, err := os.Getwd()
	if err != nil {
		return fmt.Errorf("Unable to get the current working directory: %q\n", err)
	}

	repo, err = repository.NewGitRepo(cwd, bug.Witnesser)
	if err == repository.ErrNotARepo {
		return fmt.Errorf("%s must be run from within a git repo.\n", rootCommandName)
	}

	if err != nil {
		return err
	}

	return nil
}