/*
Copyright 2021 The KubeVela Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

	http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package api

import (
	"strconv"

	restfulspec "github.com/emicklei/go-restful-openapi/v2"
	"github.com/emicklei/go-restful/v3"

	"github.com/oam-dev/kubevela/apis/types"
	"github.com/oam-dev/kubevela/pkg/apiserver/domain/service"
	apis "github.com/oam-dev/kubevela/pkg/apiserver/interfaces/api/dto/v1"
	"github.com/oam-dev/kubevela/pkg/apiserver/utils/bcode"
)

// NewAddonAPIInterface returns addon web service
func NewAddonAPIInterface() Interface {
	return &addonAPIInterface{}
}

// NewEnabledAddonAPIInterface returns enabled addon web service
func NewEnabledAddonAPIInterface() Interface {
	return &enabledAddonAPIInterface{}
}

type addonAPIInterface struct {
	RbacService    service.RBACService    `inject:""`
	AddonService   service.AddonService   `inject:""`
	ClusterService service.ClusterService `inject:""`
}

func (s *addonAPIInterface) GetWebServiceRoute() *restful.WebService {
	ws := new(restful.WebService)
	ws.Path(versionPrefix+"/addons").
		Consumes(restful.MIME_XML, restful.MIME_JSON).
		Produces(restful.MIME_JSON, restful.MIME_XML).
		Doc("api for addon management")

	tags := []string{"addon"}

	// List
	ws.Route(ws.GET("/").To(s.listAddons).
		Doc("list all addons").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Filter(s.RbacService.CheckPerm("addon", "list")).
		Param(ws.QueryParameter("registry", "filter addons from given registry").DataType("string")).
		Param(ws.QueryParameter("query", "Fuzzy search based on name and description.").DataType("string")).
		Returns(200, "OK", apis.ListAddonResponse{}).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Writes(apis.ListAddonResponse{}))

	// GET
	ws.Route(ws.GET("/{addonName}").To(s.detailAddon).
		Doc("show details of an addon").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Filter(s.RbacService.CheckPerm("addon", "detail")).
		Returns(200, "OK", apis.DetailAddonResponse{}).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Param(ws.PathParameter("name", "addon name to query detail").DataType("string").Required(true)).
		Param(ws.QueryParameter("version", "specify addon version to enable").DataType("string").Required(false)).
		Param(ws.PathParameter("addonName", "addon name to query detail").DataType("string").Required(true)).
		Param(ws.QueryParameter("registry", "filter addons from given registry").DataType("string")).
		Writes(apis.DetailAddonResponse{}))

	// GET status
	ws.Route(ws.GET("/{addonName}/status").To(s.statusAddon).
		Doc("show status of an addon").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Filter(s.RbacService.CheckPerm("addon", "detail")).
		Returns(200, "OK", apis.AddonStatusResponse{}).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Param(ws.PathParameter("addonName", "addon name to query status").DataType("string").Required(true)).
		Writes(apis.AddonStatusResponse{}))

	// enable addon
	ws.Route(ws.POST("/{addonName}/enable").To(s.enableAddon).
		Doc("enable an addon").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Reads(apis.EnableAddonRequest{}).
		Filter(s.RbacService.CheckPerm("addon", "enable")).
		Returns(200, "OK", apis.AddonStatusResponse{}).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Param(ws.PathParameter("addonName", "addon name to enable").DataType("string").Required(true)).
		Writes(apis.AddonStatusResponse{}))

	// disable addon
	ws.Route(ws.POST("/{addonName}/disable").To(s.disableAddon).
		Doc("disable an addon").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Returns(200, "OK", apis.AddonStatusResponse{}).
		Filter(s.RbacService.CheckPerm("addon", "disable")).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Param(ws.PathParameter("addonName", "addon name to enable").DataType("string").Required(true)).
		Param(ws.QueryParameter("force", "force disable an addon").DataType("boolean").Required(false)).
		Writes(apis.AddonStatusResponse{}))

	// update addon
	ws.Route(ws.PUT("/{addonName}/update").To(s.updateAddon).
		Doc("update an addon").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Reads(apis.EnableAddonRequest{}).
		Returns(200, "OK", apis.AddonStatusResponse{}).
		Filter(s.RbacService.CheckPerm("addon", "update")).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Param(ws.PathParameter("addonName", "addon name to update").DataType("string").Required(true)).
		Writes(apis.AddonStatusResponse{}))

	ws.Filter(authCheckFilter)
	return ws
}

func (s *addonAPIInterface) listAddons(req *restful.Request, res *restful.Response) {
	detailAddons, err := s.AddonService.ListAddons(req.Request.Context(), req.QueryParameter("registry"), req.QueryParameter("query"))
	if len(detailAddons) == 0 && err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

	var addons []*apis.AddonInfo

	for _, d := range detailAddons {
		addons = append(addons, &apis.AddonInfo{Meta: &d.Meta, RegistryName: d.RegistryName})
	}

	var message string
	if err != nil {
		message = err.Error()
	}
	err = res.WriteEntity(apis.ListAddonResponse{Addons: addons, Message: message})
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}
}

func (s *addonAPIInterface) detailAddon(req *restful.Request, res *restful.Response) {
	name := req.PathParameter("addonName")
	addon, err := s.AddonService.GetAddon(req.Request.Context(), name, req.QueryParameter("registry"), req.QueryParameter("version"))
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

	err = res.WriteEntity(addon)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

}

func (s *addonAPIInterface) enableAddon(req *restful.Request, res *restful.Response) {
	var createReq apis.EnableAddonRequest
	var args []byte
	_, err := req.Request.Body.Read(args)
	if err == nil {
		err := req.ReadEntity(&createReq)
		if err != nil {
			bcode.ReturnError(req, res, err)
			return
		}
		if err = validate.Struct(&createReq); err != nil {
			bcode.ReturnError(req, res, err)
			return
		}
	}
	if createReq.Clusters != nil {
		if createReq.Args == nil {
			createReq.Args = make(map[string]interface{})
		}
		createReq.Args[types.ClustersArg] = createReq.Clusters
	}

	name := req.PathParameter("addonName")
	err = s.AddonService.EnableAddon(req.Request.Context(), name, createReq)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

	s.statusAddon(req, res)
}

func (s *addonAPIInterface) disableAddon(req *restful.Request, res *restful.Response) {
	name := req.PathParameter("addonName")
	forceParam := req.QueryParameter("force")
	force, _ := strconv.ParseBool(forceParam)
	err := s.AddonService.DisableAddon(req.Request.Context(), name, force)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}
	s.statusAddon(req, res)
}

func (s *addonAPIInterface) statusAddon(req *restful.Request, res *restful.Response) {
	name := req.PathParameter("addonName")
	status, err := s.AddonService.StatusAddon(req.Request.Context(), name)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}
	clusters, err := s.ClusterService.ListKubeClusters(req.Request.Context(), "", 0, 0)
	if err == nil {
		// align the alias here
		for _, c := range clusters.Clusters {
			for i := range status.AllClusters {
				if c.Name == status.AllClusters[i].Name {
					status.AllClusters[i].Alias = c.Alias
					break
				}
			}
		}
	}

	err = res.WriteEntity(*status)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}
}

func (s *addonAPIInterface) updateAddon(req *restful.Request, res *restful.Response) {
	var createReq apis.EnableAddonRequest
	var args []byte
	_, err := req.Request.Body.Read(args)
	if err == nil {
		err := req.ReadEntity(&createReq)
		if err != nil {
			bcode.ReturnError(req, res, err)
			return
		}
		if err = validate.Struct(&createReq); err != nil {
			bcode.ReturnError(req, res, err)
			return
		}
	}
	if createReq.Clusters != nil {
		if createReq.Args == nil {
			createReq.Args = make(map[string]interface{})
		}
		createReq.Args[types.ClustersArg] = createReq.Clusters
	}

	name := req.PathParameter("addonName")
	err = s.AddonService.UpdateAddon(req.Request.Context(), name, createReq)
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

	s.statusAddon(req, res)
}

type enabledAddonAPIInterface struct {
	AddonService service.AddonService `inject:""`
	RbacService  service.RBACService  `inject:""`
}

func (s *enabledAddonAPIInterface) GetWebServiceRoute() *restful.WebService {
	ws := new(restful.WebService)
	ws.Path(versionPrefix+"/enabled_addon").
		Consumes(restful.MIME_XML, restful.MIME_JSON).
		Produces(restful.MIME_JSON, restful.MIME_XML).
		Doc("api for addon management")

	tags := []string{"addon"}

	// List enabled addon from cluster
	ws.Route(ws.GET("/").To(s.list).
		Doc("list all enabled addons").
		Metadata(restfulspec.KeyOpenAPITags, tags).
		Filter(s.RbacService.CheckPerm("addon", "list")).
		Param(ws.QueryParameter("registry", "filter addons from given registry").DataType("string")).
		Param(ws.QueryParameter("query", "Fuzzy search based on name and description.").DataType("string")).
		Returns(200, "OK", apis.ListEnabledAddonResponse{}).
		Returns(400, "Bad Request", bcode.Bcode{}).
		Writes(apis.ListAddonResponse{}))

	ws.Filter(authCheckFilter)
	return ws
}

func (s *enabledAddonAPIInterface) list(req *restful.Request, res *restful.Response) {
	enabledAddons, err := s.AddonService.ListEnabledAddon(req.Request.Context())
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}

	err = res.WriteEntity(apis.ListEnabledAddonResponse{EnabledAddons: enabledAddons})
	if err != nil {
		bcode.ReturnError(req, res, err)
		return
	}
}