package gitea

import (
	"fmt"
	"os"
	"path/filepath"

	"code.gitea.io/gitea/modules/structs"

	"code.gitea.io/sdk/gitea"
	"github.com/magefile/mage/mg"
	"github.com/pkg/errors"
)

const (
	AccessTokenName = "mage-gitea"
)

func Release(user, repo string, opts ...OptionFunc) error {
	options := defaultOptions()
	for _, o := range opts {
		o(options)
	}
	client := gitea.NewClient(options.BaseURL, options.Token)

	if options.Token == "" {
		accessToken, err := retrieveAccessToken(client, options.Username, options.Password)
		if err != nil {
			return errors.Wrap(err, "error while retrieving gitea access token")
		}
		client = gitea.NewClient(options.BaseURL, accessToken.Token)
	}

	if mg.Verbose() {
		fmt.Printf("Creating release '%s' for repo '%s/%s'\n", options.Title, user, repo)
	}

	release, err := client.CreateRelease(
		user,
		repo,
		options.CreateReleaseOption,
	)
	if err != nil {
		return errors.Wrap(err, "error while creating gitea release")
	}

	for _, filePath := range options.Attachments {
		file, err := os.Open(filePath)
		if err != nil {
			return errors.Wrapf(err, "error while opening file '%s'", filePath)
		}
		fileName := filepath.Base(filePath)
		if mg.Verbose() {
			fmt.Printf("Uploading attachment '%s'\n", fileName)
		}
		_, err = client.CreateReleaseAttachment(user, repo, release.ID, file, fileName)
		if err != nil {
			return errors.Wrapf(err, "error while creating attachment with file '%s'", filePath)
		}
		if err := file.Close(); err != nil {
			return errors.Wrapf(err, "error while closing file '%s'", filePath)
		}
	}

	return nil
}

func retrieveAccessToken(client *gitea.Client, username, password string) (*gitea.AccessToken, error) {
	tokens, err := client.ListAccessTokens(username, password)
	if err != nil {
		return nil, err
	}
	for _, at := range tokens {
		if at.Name == AccessTokenName {
			return at, nil
		}
	}
	accessToken, err := client.CreateAccessToken(username, password, structs.CreateAccessTokenOption{
		Name: AccessTokenName,
	})
	if err != nil {
		return nil, err
	}
	return accessToken, nil
}