// Copyright 2019 Sorint.lab
//
// 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 action

import (
	"context"

	"github.com/sorintlab/errors"

	"agola.io/agola/internal/services/common"
	serrors "agola.io/agola/internal/services/errors"
	"agola.io/agola/internal/util"
	csapitypes "agola.io/agola/services/configstore/api/types"
	cstypes "agola.io/agola/services/configstore/types"
)

type GetVariablesRequest struct {
	ParentType cstypes.ObjectKind
	ParentRef  string

	Tree             bool
	RemoveOverridden bool
}

func (h *ActionHandler) GetVariables(ctx context.Context, req *GetVariablesRequest) ([]*csapitypes.Variable, []*csapitypes.Secret, error) {
	var csvars []*csapitypes.Variable
	var cssecrets []*csapitypes.Secret

	switch req.ParentType {
	case cstypes.ObjectKindProjectGroup:
		var err error
		csvars, _, err = h.configstoreClient.GetProjectGroupVariables(ctx, req.ParentRef, req.Tree)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err)
		}
		cssecrets, _, err = h.configstoreClient.GetProjectGroupSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err)
		}
	case cstypes.ObjectKindProject:
		var err error
		csvars, _, err = h.configstoreClient.GetProjectVariables(ctx, req.ParentRef, req.Tree)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err)
		}
		cssecrets, _, err = h.configstoreClient.GetProjectSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err)
		}
	}

	if req.RemoveOverridden {
		// remove overriden variables
		csvars = common.FilterOverriddenVariables(csvars)
	}

	return csvars, cssecrets, nil
}

type CreateVariableRequest struct {
	Name string

	ParentType cstypes.ObjectKind
	ParentRef  string

	Values []cstypes.VariableValue
}

func (h *ActionHandler) CreateVariable(ctx context.Context, req *CreateVariableRequest) (*csapitypes.Variable, []*csapitypes.Secret, error) {
	isVariableOwner, err := h.IsAuthUserVariableOwner(ctx, req.ParentType, req.ParentRef)
	if err != nil {
		return nil, nil, errors.Wrapf(err, "failed to determine ownership")
	}
	if !isVariableOwner {
		return nil, nil, util.NewAPIError(util.ErrForbidden, util.WithAPIErrorMsg("user not authorized"))
	}

	if !util.ValidateName(req.Name) {
		return nil, nil, util.NewAPIError(util.ErrBadRequest, util.WithAPIErrorMsgf("invalid variable name %q", req.Name), serrors.InvalidVariableName())
	}

	if len(req.Values) == 0 {
		return nil, nil, util.NewAPIError(util.ErrBadRequest, util.WithAPIErrorMsg("empty variable values"), serrors.InvalidVariableValues())
	}

	creq := &csapitypes.CreateUpdateVariableRequest{
		Name:   req.Name,
		Values: req.Values,
	}

	var cssecrets []*csapitypes.Secret
	var rv *csapitypes.Variable

	switch req.ParentType {
	case cstypes.ObjectKindProjectGroup:
		var err error
		cssecrets, _, err = h.configstoreClient.GetProjectGroupSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsgf("failed to get project group %q secrets", req.ParentRef))
		}

		h.log.Info().Msg("creating project group variable")
		rv, _, err = h.configstoreClient.CreateProjectGroupVariable(ctx, req.ParentRef, creq)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsg("failed to create variable"))
		}
	case cstypes.ObjectKindProject:
		var err error
		cssecrets, _, err = h.configstoreClient.GetProjectSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsgf("failed to get project %q secrets", req.ParentRef))
		}

		h.log.Info().Msg("creating project variable")
		rv, _, err = h.configstoreClient.CreateProjectVariable(ctx, req.ParentRef, creq)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsg("failed to create variable"))
		}
	}
	h.log.Info().Msgf("variable %s created, ID: %s", rv.Name, rv.ID)

	return rv, cssecrets, nil
}

type UpdateVariableRequest struct {
	VariableName string

	Name string

	ParentType cstypes.ObjectKind
	ParentRef  string

	Values []cstypes.VariableValue
}

func (h *ActionHandler) UpdateVariable(ctx context.Context, req *UpdateVariableRequest) (*csapitypes.Variable, []*csapitypes.Secret, error) {
	isVariableOwner, err := h.IsAuthUserVariableOwner(ctx, req.ParentType, req.ParentRef)
	if err != nil {
		return nil, nil, errors.Wrapf(err, "failed to determine ownership")
	}
	if !isVariableOwner {
		return nil, nil, util.NewAPIError(util.ErrForbidden, util.WithAPIErrorMsg("user not authorized"))
	}

	if !util.ValidateName(req.Name) {
		return nil, nil, util.NewAPIError(util.ErrBadRequest, util.WithAPIErrorMsgf("invalid variable name %q", req.Name), serrors.InvalidVariableName())
	}

	if len(req.Values) == 0 {
		return nil, nil, util.NewAPIError(util.ErrBadRequest, util.WithAPIErrorMsg("empty variable values"), serrors.InvalidVariableValues())
	}

	creq := &csapitypes.CreateUpdateVariableRequest{
		Name:   req.Name,
		Values: req.Values,
	}

	var cssecrets []*csapitypes.Secret
	var rv *csapitypes.Variable

	switch req.ParentType {
	case cstypes.ObjectKindProjectGroup:
		var err error
		cssecrets, _, err = h.configstoreClient.GetProjectGroupSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsgf("failed to get project group %q secrets", req.ParentRef))
		}

		h.log.Info().Msg("creating project group variable")
		rv, _, err = h.configstoreClient.UpdateProjectGroupVariable(ctx, req.ParentRef, req.VariableName, creq)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsg("failed to create variable"))
		}
	case cstypes.ObjectKindProject:
		var err error
		cssecrets, _, err = h.configstoreClient.GetProjectSecrets(ctx, req.ParentRef, true)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsgf("failed to get project %q secrets", req.ParentRef))
		}

		h.log.Info().Msg("creating project variable")
		rv, _, err = h.configstoreClient.UpdateProjectVariable(ctx, req.ParentRef, req.VariableName, creq)
		if err != nil {
			return nil, nil, APIErrorFromRemoteError(err, util.WithAPIErrorMsg("failed to create variable"))
		}
	}
	h.log.Info().Msgf("variable %s created, ID: %s", rv.Name, rv.ID)

	return rv, cssecrets, nil
}

func (h *ActionHandler) DeleteVariable(ctx context.Context, parentType cstypes.ObjectKind, parentRef, name string) error {
	isVariableOwner, err := h.IsAuthUserVariableOwner(ctx, parentType, parentRef)
	if err != nil {
		return errors.Wrapf(err, "failed to determine ownership")
	}
	if !isVariableOwner {
		return util.NewAPIError(util.ErrForbidden, util.WithAPIErrorMsg("user not authorized"))
	}

	switch parentType {
	case cstypes.ObjectKindProjectGroup:
		h.log.Info().Msg("deleting project group variable")
		_, err = h.configstoreClient.DeleteProjectGroupVariable(ctx, parentRef, name)
	case cstypes.ObjectKindProject:
		h.log.Info().Msg("deleting project variable")
		_, err = h.configstoreClient.DeleteProjectVariable(ctx, parentRef, name)
	}
	if err != nil {
		return APIErrorFromRemoteError(err, util.WithAPIErrorMsg("failed to delete variable"))
	}
	return nil
}
