package main

import (
	"fmt"
	"log"
	"os"
	"strings"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing/object"

	"github.com/AlecAivazis/survey/v2"
)

func CheckIfError(err error) {
	if err != nil {
		log.Fatal("Fail")
		os.Exit(1)
	}
}

func main() {
	repo, err := git.PlainOpen(".")
	CheckIfError(err)

	cIter, err := repo.Log(&git.LogOptions{})
	CheckIfError(err)

	contributersMap := map[string]bool{}
	contributers := []string{}

	err = cIter.ForEach(func(c *object.Commit) error {
		line := fmt.Sprintf("%s <%s>", c.Author.Name, c.Author.Email)
		if !contributersMap[line] {
			contributersMap[line] = true
			contributers = append(contributers, line)
		}
		return nil
	})
	CheckIfError(err)

	prompt := &survey.Select{
		Message: "Which contributer:",
		Options: contributers,
		Filter: func(filterValue string, optValue string, optIndex int) bool {
			return strings.Contains(optValue, filterValue)
		},
	}

	contributer := ""
	// or define a default for all of the questions
	survey.AskOne(prompt, &contributer)
}