package git

import (
	"encoding/base64"
	"errors"
	"net/http"

	"code.gitea.io/sdk/gitea"
)

var cli *gitea.Client

func init() {
	var err error
	cli, err = gitea.NewClient("https://git.icechen.cn/", gitea.SetToken("4322b0d361004db5dcea1741417f9e014a0f428f"))
	if err != nil {
		panic(err)
	}
}

// DefaultRealConfigFilePath 默认原始配置文件路径
const DefaultRealConfigFilePath = ".drone.yml"

// Client git 客户端
type Client struct {
	namespace      string
	repo           string
	ref            string
	realConfigPath string
}

// New 创建 git 客户端
func New(namespace string, repo string, ref string, configPath string) Client {
	return Client{
		namespace:      namespace,
		repo:           repo,
		ref:            ref,
		realConfigPath: configPath,
	}
}

// GetFileContent 获取文件内容
func (c Client) GetFileContent(filepath string) (string, error) {
	ret, resp, err := cli.GetContents(c.namespace, c.repo, c.ref, filepath)
	if err != nil {
		return "", err
	}
	if resp.StatusCode != http.StatusOK {
		return "", errors.New("gitea fail")
	}

	fileContent, err := base64.StdEncoding.DecodeString(*ret.Content)
	if err != nil {
		return "", err
	}
	return string(fileContent), nil
}

// GetRealConfig 获取原始配置文件
func (c Client) GetRealConfig() (string, error) {
	filePath := DefaultRealConfigFilePath
	if c.realConfigPath == "" {
		filePath = c.realConfigPath
	}
	return c.GetFileContent(filePath)
}

func (c Client) GetCommitModifiedFileList() ([]string, error) {
	commit, resp, err := cli.GetSingleCommit(c.namespace, c.repo, c.ref)
	if err != nil {
		return nil, err
	}
	if resp.StatusCode != http.StatusOK {
		return nil, errors.New("gitea fail")
	}

	modifiedFileList := make([]string, len(commit.Files))
	for i, file := range commit.Files {
		modifiedFileList[i] = file.Filename
	}
	return modifiedFileList, nil
}