package main

import (
	"crypto/tls"
	"github.com/go-git/go-git/v5"
	. "github.com/go-git/go-git/v5/_examples"
	"github.com/go-git/go-git/v5/plumbing/object"
	"github.com/go-git/go-git/v5/plumbing/transport/client"
	githttp "github.com/go-git/go-git/v5/plumbing/transport/http"
	"golang.org/x/crypto/openpgp"
	"net/http"
	"os"
	"time"
)

func getPGPIdentity() (*openpgp.Entity, error) {

	secKeyRing, err := os.Open("/<path>/<to>/.gnupg/secring.gpg")
	if err != nil { return nil, err }

	entities, err := openpgp.ReadKeyRing(secKeyRing)
	if err != nil { return nil, err }
	e := entities[0]
	return e, nil
}


// Example of how to open a repository in a specific path, and push to
// its default remote (origin).
func main() {
	CheckArgs("<repository-path>", "<uname>", "<pass>")
	path := os.Args[1]
	uname := os.Args[2]
	password := os.Args[3]
	auth := &githttp.BasicAuth{uname, password}

	r, err := git.PlainOpen(path)
	CheckIfError(err)
	Info("opening repo..")

	wt, err := r.Worktree()
	CheckIfError(err)
	Info("creating working tree")

	err = wt.AddGlob(".")
	CheckIfError(err)
	Info("adding changes to staging")

	pgpEntity, err := getPGPIdentity()
	CheckIfError(err)

	err = pgpEntity.PrivateKey.Decrypt([]byte("<gpg_prviate_key_pass>"))
	CheckIfError(err)

	_, err = wt.Commit("dark commit", &git.CommitOptions{
		Author: &object.Signature{ Name: "git_user", Email: "git_user@git_user_email", When: time.Now(), },
		Committer: &object.Signature{ Name: "git_user", Email: "git_user@git_user_email", When: time.Now(), },
		SignKey: pgpEntity,
	})
	
	Info("making commit")

	// Create a custom http(s) client with your config
	customClient := &http.Client{
		// accept any certificate (might be useful for testing)
		Transport: &http.Transport{
			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
		},

		// 15 second timeout
		Timeout: 15 * time.Second,

		// don't follow redirect
		CheckRedirect: func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		},
	}

	// Override http(s) default protocol to use our custom client
	client.InstallProtocol("https", githttp.NewClient(customClient))

	Info("git push")



	// push using default options
	err = r.Push(&git.PushOptions{ Auth: auth})
	CheckIfError(err)
}