package datastore

import (
	"net/http"

	"connectrpc.com/connect"
	"github.com/google/uuid"
	porterv1 "github.com/porter-dev/api-contracts/generated/go/porter/v1"
	"github.com/porter-dev/porter/api/server/authz"
	"github.com/porter-dev/porter/api/server/handlers"
	"github.com/porter-dev/porter/api/server/shared"
	"github.com/porter-dev/porter/api/server/shared/apierrors"
	"github.com/porter-dev/porter/api/server/shared/config"
	"github.com/porter-dev/porter/api/server/shared/requestutils"
	"github.com/porter-dev/porter/api/types"
	"github.com/porter-dev/porter/internal/models"
	"github.com/porter-dev/porter/internal/telemetry"
)

// DeleteDatastoreHandler is a struct for handling datastore deletion requests
type DeleteDatastoreHandler struct {
	handlers.PorterHandlerReadWriter
	authz.KubernetesAgentGetter
}

// NewDeleteDatastoreHandler constructs a datastore DeleteDatastoreHandler
func NewDeleteDatastoreHandler(
	config *config.Config,
	decoderValidator shared.RequestDecoderValidator,
	writer shared.ResultWriter,
) *DeleteDatastoreHandler {
	return &DeleteDatastoreHandler{
		PorterHandlerReadWriter: handlers.NewDefaultPorterHandler(config, decoderValidator, writer),
		KubernetesAgentGetter:   authz.NewOutOfClusterAgentGetter(config),
	}
}

func (h *DeleteDatastoreHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	ctx, span := telemetry.NewSpan(r.Context(), "serve-delete-datastore")
	defer span.End()
	project, _ := ctx.Value(types.ProjectScope).(*models.Project)

	datastoreName, reqErr := requestutils.GetURLParamString(r, types.URLParamDatastoreName)
	if reqErr != nil {
		err := telemetry.Error(ctx, span, nil, "error parsing datastore name")
		h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusBadRequest))
		return
	}
	telemetry.WithAttributes(span, telemetry.AttributeKV{Key: "datastore-name", Value: datastoreName})

	datastoreRecord, err := h.Repo().Datastore().GetByProjectIDAndName(ctx, project.ID, datastoreName)
	if err != nil {
		err = telemetry.Error(ctx, span, err, "datastore record not found")
		h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusInternalServerError))
		return
	}

	if !datastoreRecord.OnManagementCluster {
		if datastoreRecord == nil || datastoreRecord.ID == uuid.Nil {
			err = telemetry.Error(ctx, span, nil, "datastore record does not exist")
			h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusNotFound))
			return
		}

		_, err = h.Repo().Datastore().UpdateStatus(ctx, datastoreRecord, models.DatastoreStatus_AwaitingDeletion)
		if err != nil {
			err = telemetry.Error(ctx, span, err, "error updating datastore status")
			h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusInternalServerError))
			return
		}

		updateReq := connect.NewRequest(&porterv1.UpdateDatastoreRequest{
			ProjectId:   int64(project.ID),
			DatastoreId: datastoreRecord.ID.String(),
		})

		_, err = h.Config().ClusterControlPlaneClient.UpdateDatastore(ctx, updateReq)
		if err != nil {
			err := telemetry.Error(ctx, span, err, "error calling ccp update datastore")
			h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusInternalServerError))
			return
		}

		w.WriteHeader(http.StatusAccepted)
		return
	}

	req := connect.NewRequest(&porterv1.PatchCloudContractRequest{
		ProjectId:    int64(project.ID),
		Operation:    porterv1.EnumPatchCloudContractOperation_ENUM_PATCH_CLOUD_CONTRACT_OPERATION_DELETE,
		ResourceType: porterv1.EnumPatchCloudContractType_ENUM_PATCH_CLOUD_CONTRACT_TYPE_DATASTORE,
		ResourceId:   datastoreRecord.ID.String(),
	})
	_, err = h.Config().ClusterControlPlaneClient.PatchCloudContract(ctx, req)
	if err != nil {
		err = telemetry.Error(ctx, span, err, "error patching cloud contract")
		h.HandleAPIError(w, r, apierrors.NewErrPassThroughToClient(err, http.StatusInternalServerError))
		return
	}

	w.WriteHeader(http.StatusAccepted)
}