package buildqueue

import (
	"brunel/config"
	"brunel/domain"
	"fmt"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"time"

	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/plumbing"
	"github.com/go-git/go-git/v5/plumbing/object"
	"github.com/go-git/go-git/v5/plumbing/transport/http"
)

const configsFolder = "pika-build-config"

func InitGit() error {
	_, err := git.PlainClone(config.Configs.GitCache, false, &git.CloneOptions{
		URL:           config.Configs.Buildrepo,
		SingleBranch:  true,
		ReferenceName: plumbing.ReferenceName(config.Configs.Buildbranch),
		Depth:         1,
		Auth: &http.BasicAuth{
			Password: config.Configs.GitToken,
			Username: config.Configs.GitUser,
		},
	})
	return err
}

func ResetAndPull() error {
	gt, err := git.PlainOpen(config.Configs.GitCache)
	if err != nil {
		return err
	}
	wk, err := gt.Worktree()
	if err != nil {
		return err
	}
	err = wk.Reset(&git.ResetOptions{
		Mode: git.HardReset,
	})
	if err != nil {
		return err
	}
	err = wk.Pull(&git.PullOptions{
		Auth: &http.BasicAuth{
			Password: config.Configs.GitToken,
			Username: config.Configs.GitUser,
		},
		RemoteName:    "origin",
		ReferenceName: plumbing.ReferenceName(config.Configs.Buildbranch),
	})
	return err
}

func UpdateBuildFile(buildItem domain.BuildQueueItem) error {
	if _, err := os.Stat(config.Configs.GitCache); os.IsNotExist(err) {
		err := InitGit()
		if err != nil {
			return err
		}
	}
	err := ResetAndPull()
	if err != nil {
		return err
	}

	repo, err := git.PlainOpen(config.Configs.GitCache)
	if err != nil {
		return err
	}

	wt, err := repo.Worktree()
	if err != nil {
		return err
	}

	content := constructFileContent(buildItem)
	filePath := filepath.Join(config.Configs.GitCache, configsFolder, string(buildItem.Type)+".sh")
	err = os.WriteFile(filePath, []byte(content), 0644)
	if err != nil {
		return err
	}

	_, err = wt.Add(configsFolder + "/" + string(buildItem.Type) + ".sh")
	if err != nil {
		return err
	}

	_, err = wt.Commit(buildItem.Source.Name+"="+buildItem.BuildVersion, &git.CommitOptions{
		Author: &object.Signature{
			Name:  "Brunel",
			Email: "brunel@pika-os.com",
			When:  time.Now(),
		},
	})
	if err != nil {
		return err
	}

	err = repo.Push(&git.PushOptions{
		Auth: &http.BasicAuth{
			Password: config.Configs.GitToken,
			Username: config.Configs.GitUser,
		},
		RemoteName: "origin",
	})
	if err != nil {
		return err
	}

	return nil
}

func constructFileContent(buildItem domain.BuildQueueItem) string {
	content := []string{
		fmt.Sprintf(`export PIKA_PACKAGE_VERSION="%s"`, buildItem.BuildVersion),
		fmt.Sprintf(`export PIKA_PACKAGE_NAME="%s"`, buildItem.Source.Name),
		fmt.Sprintf(`export PIKA_PACKAGE_PATCH=%t`, buildItem.Patch),
		fmt.Sprintf(`export PIKA_REBUILD=%t`, buildItem.Rebuild),
		fmt.Sprintf(`export PIKA_REBUILD_VERSION="%s"`, "b"+strconv.Itoa(buildItem.BuildNumber)),
		fmt.Sprintf(`export PIKA_BUILD_ATTEMPT="%d"`, buildItem.BuildNumber),
	}

	return strings.Join(content, "\n")
}