// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
 
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

package exector

import (
	"fmt"
	"os"
	"strings"
	"time"

	"github.com/goodrain/rainbond/pkg/builder/sources"
	"github.com/goodrain/rainbond/pkg/util"

	"github.com/goodrain/rainbond/pkg/db"
	"github.com/goodrain/rainbond/pkg/event"

	"github.com/docker/engine-api/types"
	"github.com/pquerna/ffjson/ffjson"

	"github.com/goodrain/rainbond/pkg/builder/model"

	"github.com/Sirupsen/logrus"
	"github.com/akkuman/parseConfig"
)

const (
	cloneTimeout    = 60
	buildingTimeout = 180
	formatSourceDir = "/cache/build/%s/source/%s"
)

func (e *exectorManager) pluginDockerfileBuild(in []byte) {
	config := getConf(configPath)
	var tb model.BuildPluginTaskBody
	if err := ffjson.Unmarshal(in, &tb); err != nil {
		logrus.Errorf("unmarshal taskbody error, %v", err)
		return
	}
	eventID := tb.EventID
	logger := event.GetManager().GetLogger(eventID)
	logger.Info("从dockerfile构建插件任务开始执行", map[string]string{"step": "builder-exector", "status": "starting"})

	go func() {
		time.Sleep(buildingTimeout * time.Second)
		logrus.Debugf("building plugin time-out time is reach")
		version, err := db.GetManager().TenantPluginBuildVersionDao().GetBuildVersionByVersionID(tb.PluginID, tb.VersionID)
		if err != nil {
			logrus.Errorf("get version error, %v", err)
		}
		if version.Status != "complete" {
			version.Status = "timeout"
			if err := db.GetManager().TenantPluginBuildVersionDao().UpdateModel(version); err != nil {
				logrus.Errorf("update version error, %v", err)
			}
			logger.Error("插件构建超时，修改插件状态失败", map[string]string{"step": "callback", "status": "failure"})
		}
	}()
	go func() {
		logrus.Info("start exec build plugin from image worker")
		defer event.GetManager().ReleaseLogger(logger)
		for retry := 0; retry < 2; retry++ {
			err := e.runD(&tb, config, logger)
			if err != nil {
				logrus.Errorf("exec plugin build from dockerfile error:%s", err.Error())
				logger.Info("dockerfile构建插件任务执行失败，开始重试", map[string]string{"step": "builder-exector", "status": "failure"})
			} else {
				return
			}
		}
		version, err := db.GetManager().TenantPluginBuildVersionDao().GetBuildVersionByVersionID(tb.PluginID, tb.VersionID)
		if err != nil {
			logrus.Errorf("get version error, %v", err)
		}
		version.Status = "failure"
		if err := db.GetManager().TenantPluginBuildVersionDao().UpdateModel(version); err != nil {
			logrus.Errorf("update version error, %v", err)
		}
		logger.Error("dockerfile构建插件任务执行失败", map[string]string{"step": "callback", "status": "failure"})
	}()
}

func (e *exectorManager) runD(t *model.BuildPluginTaskBody, c parseConfig.Config, logger event.Logger) error {
	logger.Info("开始拉取代码", map[string]string{"step": "build-exector"})
	sourceDir := fmt.Sprintf(formatSourceDir, t.TenantID, t.VersionID)
	if t.Repo == "" {
		t.Repo = "master"
	}
	if !util.DirIsEmpty(sourceDir) {
		os.RemoveAll(sourceDir)
	}
	if err := util.CheckAndCreateDir(sourceDir); err != nil {
		return err
	}
	if _, err := sources.GitClone(sources.CodeSourceInfo{RepositoryURL: t.GitURL, Branch: t.Repo}, sourceDir, logger, 4); err != nil {
		logger.Error("拉取代码失败", map[string]string{"step": "builder-exector", "status": "failure"})
		logrus.Errorf("[plugin]git clone code error %v", err)
		return err
	}
	if !checkDockerfile(sourceDir) {
		logger.Error("代码未检测到dockerfile，暂不支持构建，任务即将退出", map[string]string{"step": "builder-exector", "status": "failure"})
		logrus.Error("代码未检测到dockerfile")
		return fmt.Errorf("have no dockerfile")
	}

	logger.Info("代码检测为dockerfile，开始编译", map[string]string{"step": "build-exector"})
	mm := strings.Split(t.GitURL, "/")
	n1 := strings.Split(mm[len(mm)-1], ".")[0]
	buildImageName := strings.ToLower(fmt.Sprintf("goodrain.me/%s_%s", n1, t.VersionID))
	buildOptions := types.ImageBuildOptions{
		Tags:   []string{buildImageName},
		Remove: true,
	}
	if noCache := os.Getenv("NO_CACHE"); noCache != "" {
		buildOptions.NoCache = true
	} else {
		buildOptions.NoCache = false
	}
	logger.Info("开始构建镜像", map[string]string{"step": "builder-exector"})
	err := sources.ImageBuild(e.DockerClient, sourceDir, buildOptions, logger, 5)
	if err != nil {
		logger.Error(fmt.Sprintf("构造镜像%s失败: %s", buildImageName, err.Error()), map[string]string{"step": "builder-exector", "status": "failure"})
		logrus.Errorf("[plugin]build image error: %s", err.Error())
		return err
	}
	auth, err := sources.EncodeAuthToBase64(types.AuthConfig{Username: "", Password: ""})
	if err != nil {
		logrus.Errorf("make auth base63 push image error: %s", err.Error())
		logger.Error(fmt.Sprintf("推送镜像内部错误"), map[string]string{"step": "builder-exector", "status": "failure"})
		return err
	}
	ipo := types.ImagePushOptions{
		RegistryAuth: auth,
	}
	logger.Info("镜像构建成功，开始推送镜像至仓库", map[string]string{"step": "builder-exector"})
	err = sources.ImagePush(e.DockerClient, buildImageName, ipo, logger, 2)
	if err != nil {
		logger.Error("推送镜像失败", map[string]string{"step": "builder-exector"})
		logrus.Errorf("push image error: %s", err.Error())
		return err
	}
	logger.Info("推送镜像完成", map[string]string{"step": "build-exector"})
	version, err := db.GetManager().TenantPluginBuildVersionDao().GetBuildVersionByVersionID(t.PluginID, t.VersionID)
	if err != nil {
		logrus.Errorf("get version error, %v", err)
		return err
	}
	version.BuildLocalImage = buildImageName
	version.Status = "complete"
	if err := db.GetManager().TenantPluginBuildVersionDao().UpdateModel(version); err != nil {
		logrus.Errorf("update version error, %v", err)
		return err
	}
	logger.Info("从dockerfile构建插件完成", map[string]string{"step": "last", "status": "success"})
	return nil
}

func checkDockerfile(sourceDir string) bool {
	if _, err := os.Stat(fmt.Sprintf("%s/Dockerfile", sourceDir)); os.IsNotExist(err) {
		return false
	}
	return true
}