package grpcapi

import (
	context "context"
	"net"
	"time"

	"git.coopgo.io/coopgo-platform/diags/handlers"
	// "git.coopgo.io/coopgo-platform/diags/storage"
	// timestamp "github.com/golang/protobuf/ptypes/timestamp"
	"github.com/rs/zerolog/log"
	"github.com/spf13/viper"
	"google.golang.org/grpc"
	codes "google.golang.org/grpc/codes"
	"google.golang.org/grpc/reflection"
	status "google.golang.org/grpc/status"
	// "google.golang.org/protobuf/types/known/structpb"
)

type DiagsServerImpl struct {
	handler handlers.DiagsHandler
}

func NewDiagsServer(h handlers.DiagsHandler) *DiagsServerImpl {
	return &DiagsServerImpl{
		handler: h,
	}
}

func (s DiagsServerImpl) CreateDiag(ctx context.Context, req *CreateDiagRequest) (*CreateDiagResponse, error) {
	e := req.Diag.ToStorageType()
	diag, err := s.handler.CreateDiag(e)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.AlreadyExists, "diag creation failed : %v", err)
	}
	response, err := DiagFromStorageType(diag)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.Internal, "issue while retrieving diag : %v", err)
	}
	return &CreateDiagResponse{Diag: response}, nil
}
func (s DiagsServerImpl) GetDiag(ctx context.Context, req *GetDiagRequest) (*GetDiagResponse, error) {
	diag, err := s.handler.GetDiag(req.Id)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.AlreadyExists, "issue while retrieving diag : %v", err)
	}
	response, err := DiagFromStorageType(diag)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.Internal, "issue while retrieving diag : %v", err)
	}
	return &GetDiagResponse{Diag: response}, nil
}
func (s DiagsServerImpl) GetDiags(ctx context.Context, req *GetDiagsRequest) (*GetDiagsResponse, error) {
	var mindate, maxdate *time.Time

	if req.Mindate != nil {
		m := req.Mindate.AsTime()
		mindate = &m
	}

	if req.Maxdate != nil {
		m := req.Maxdate.AsTime()
		mindate = &m
	}

	responses, err := s.handler.GetDiags(req.Namespaces, mindate, maxdate)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.NotFound, "could not get diags : %v", err)
	}
	var diags []*Diag

	for _, e := range responses {
		diag, err := DiagFromStorageType(&e)
		if err != nil {
			log.Error().Err(err).Msg("")
			return nil, status.Errorf(codes.Internal, "could not get diags : %v", err)
		}
		diags = append(diags, diag)
	}
	return &GetDiagsResponse{Diags: diags}, nil
}
func (s DiagsServerImpl) DeleteDiag(context.Context, *DeleteDiagRequest) (*DeleteDiagResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method DeleteDiag not implemented")
}


func (s DiagsServerImpl) UpdateDiag(ctx context.Context, req *UpdateDiagRequest) (*UpdateDiagResponse, error) {
	b := req.Diag.ToStorageType()
	diag, err := s.handler.UpdateDiag(b)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.AlreadyExists, "diag update failed : %v", err)
	}
	response, err := DiagFromStorageType(diag)
	if err != nil {
		log.Error().Err(err).Msg("")
		return nil, status.Errorf(codes.Internal, "issue while retrieving diag : %v", err)
	}
	return &UpdateDiagResponse{Diag: response}, nil
}

func (s DiagsServerImpl) mustEmbedUnimplementedDiagsServer() {}

func Run(done chan error, cfg *viper.Viper, handler handlers.DiagsHandler) {
	var (
		dev_env = cfg.GetBool("dev_env")
		address = ":" + cfg.GetString("services.grpc.port")
	)
	log.Info().Str("address", address).Msg("Running gRPC server")

	server := grpc.NewServer()
	RegisterDiagsServer(server, NewDiagsServer(handler))
	l, err := net.Listen("tcp", address)
	if err != nil {
		log.Fatal().Str("address", address).Err(err).Msg("Cannot listen to address")
	}

	if dev_env {
		reflection.Register(server)
	}

	if err := server.Serve(l); err != nil {
		log.Error().Err(err).Msg("gRPC service ended")
		done <- err
	}
}