// package bunny provides the public API for the eBunny tool.
package bunny

import (
	"errors"
	"fmt"
	"strconv"
	"strings"

	"github.com/eculver/go-play/pkg/bunny/github"
)

// New returns a new Bunny that is JACKED and ready to JUMP
func New() Bunny {
	// all our Bunny can do for now is jump to GitHub URLs in a browser
	return &GitHubBunny{
		Commands: []string{"github", "gh"},
	}
}

// Bunny is an incredibly cute animal that jumps. When a bunny lands its jump,
// it can either stop or... keep jumping! The options are limitless!
//
// From a practical perspective, this is root of our execution path. A Bunny
// will call Jump's until the path terminates. It's just a way to express paths
// through the tree of all known Jumps. When the bunny starts up, a Jump graph
// is generated from config/code and the root Jump
// starts traversing until it's done.
type Bunny interface {
	Jump(args ...string) error
}

// GitHubBunny Jumps to GitHub URLs
type GitHubBunny struct {
	Commands []string
}

// Jump ...
func (gh *GitHubBunny) Jump(args ...string) error {
	if len(args) == 0 {
		return errors.New("GitHub Bunny requires arguments. Usage will be here eventually")
	}

	// this is going to change to be a proper traversal
	if len(args) == 3 {
		switch args[0] {
		case "pr":
			num, err := strconv.Atoi(args[2])
			if err != nil {
				return fmt.Errorf("must pass number for PR num, got: %s. %w", args[2], err)
			}
			orgRepo := strings.Split(args[1], "/")
			if len(orgRepo) > 1 {
				return github.OpenPullRequest(orgRepo[0], orgRepo[1], num)
			}
			return fmt.Errorf("must pass / delimited org/repo string, got: %s", args[1])
		}
	}
	return fmt.Errorf("Nothing happened for args: %v", args)
}