package handlers

import (
	"encoding/json"
	"fmt"
	"net/http"

	"github.com/fiskerinc/cloud-services/pkg/grpc/kafka_grpc"

	"otaupdate/services"

	"github.com/fiskerinc/cloud-services/pkg/carcommand"
	"github.com/fiskerinc/cloud-services/pkg/common"
	"github.com/fiskerinc/cloud-services/pkg/common/actionlogger"
	"github.com/fiskerinc/cloud-services/pkg/httphandlers"
	"github.com/fiskerinc/cloud-services/pkg/kafka"
	"github.com/fiskerinc/cloud-services/pkg/logger"
	"github.com/fiskerinc/cloud-services/pkg/loggerdataresp"
	"github.com/fiskerinc/cloud-services/pkg/utils"
	"google.golang.org/protobuf/proto"
)

// HandleVehicleCommand godoc
// @Summary Send command to car
// @Description Send command to car
// @Accept  json
// @Produce  json
// @Param Authorization header string false "Bearer <ID token>"
// @Param Api-Key header string false "<API token>"
// @Param Command body common.BulkCarCommands true "Command to send to cars"
// @Success 200 {object} common.JSONMessage
// @Failure 400 {object} common.JSONError "Bad request"
// @Failure 401 {object} common.JSONError "Unauthorized"
// @Failure 503 {object} common.JSONError "Service unavailable"
// @Router /vehiclecommand [post]
func HandleVehicleCommand(w http.ResponseWriter, r *http.Request) {
	var request common.BulkCarCommands
	err := httphandlers.ParseRequest(r, &request)
	if loggerdataresp.BadDataErrorResp(w, err, http.StatusBadRequest) {
		return
	}

	err = carcommand.ValidateCommand(request.Command)
	if loggerdataresp.BadDataErrorResp(w, err, http.StatusBadRequest) {
		return
	}

	k := services.GetKafkaProducer()

	alDB := services.GetDB().GetActionLog()

	// Throwing away error, do not need
	description, _ := json.Marshal(request.RemoteCommandSource)

	for _, vin := range request.VINs {
		go func(vin string) {
			actionLog := actionlogger.ActionLog{
				VIN:            vin,
				Action:         actionlogger.RemoteCommand,
				UserIdentifier: httphandlers.GetClientID(r),
				CallLocation:   "github.com/fiskerinc/cloud-services/services/ota_update_go/handlers/vehicle_command.go",
				Description:    string(description),
			}
			err = alDB.Insert(actionLog)
			if err != nil {
				logger.Err(err).Msg("failed to insert action log inside HandleVehicleCommand")
			}
		}(vin)

		data := common.RemoteCommandRequest{
			VIN:                 vin,
			Source:              httphandlers.GetClientID(r),
			RemoteCommandSource: request.RemoteCommandSource,
		}
		dataBytes, _ := json.Marshal(data)
		var cmd kafka_grpc.RemoteCommand
		err := json.Unmarshal(dataBytes, &cmd)
		// I don't know if there is any reason to stick these in kafka. Like I think they are just 
		// inserted into the redis pub sub
		if err == nil {
			payload := kafka_grpc.GRPC_ValetPayload{
				Handler: "remote_command",
				Data: &kafka_grpc.GRPC_ValetPayload_RemoteCmd{
					RemoteCmd: &cmd,
				},
			}
			binaryPayload, _ := proto.Marshal(&payload)
			err = k.ProduceBinary(
				kafka.ValetServiceGRPCKafka,
				common.Service.Key(vin),
				binaryPayload,
				nil,
			)
		}
		if loggerdataresp.BadDataErrorResp(w, err, http.StatusServiceUnavailable) {
			return
		}
	}

	utils.RespJSON(w, http.StatusOK, &common.JSONMessage{
		Message: fmt.Sprintf("remote command sent to %d vehicles", len(request.VINs)),
	})
}