package grpcapi

import (
	context "context"
	"fmt"
	"log"
	"net"

	"git.coopgo.io/coopgo-platform/mobility-accounts/handlers"
	"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"
)

type MobilityAccountsServerImpl struct {
	handler handlers.MobilityAccountsHandler
}

func NewMobilityAccountsServer(h handlers.MobilityAccountsHandler) *MobilityAccountsServerImpl {
	return &MobilityAccountsServerImpl{
		handler: h,
	}
}

func (s MobilityAccountsServerImpl) Login(ctx context.Context, req *LoginRequest) (*LoginResponse, error) {
	account, err := s.handler.Login(req.Username, req.Password, req.Namespace)
	if err != nil {
		return nil, status.Errorf(codes.NotFound, "could not log in : %v", err)
	}
	response, err := AccountFromStorageType(account)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.Internal, "issue while retrieving account : %v", err)
	}
	return &LoginResponse{Account: response}, nil
}
func (s MobilityAccountsServerImpl) Register(ctx context.Context, req *RegisterRequest) (*RegisterResponse, error) {
	a := req.Account.ToStorageType()
	account, err := s.handler.Register(a)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.AlreadyExists, "account creation failed : %v", err)
	}
	response, err := AccountFromStorageType(account)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.Internal, "issue while retrieving account : %v", err)
	}
	return &RegisterResponse{Account: response}, nil
}
func (s MobilityAccountsServerImpl) UpdateData(ctx context.Context, req *UpdateDataRequest) (*UpdateDataResponse, error) {
	a := req.Account.ToStorageType()
	account, err := s.handler.UpdateData(a.ID, a.Data)
	if err != nil {
		return nil, status.Errorf(codes.Internal, "issue while apdating account : %v", err)
	}
	response, err := AccountFromStorageType(account)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.Internal, "issue while retrieving account : %v", err)
	}
	return &UpdateDataResponse{Account: response}, nil
}
func (s MobilityAccountsServerImpl) GetAccount(ctx context.Context, req *GetAccountRequest) (*GetAccountResponse, error) {
	account, err := s.handler.GetAccount(req.Id)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.AlreadyExists, "issue while retrieving account : %v", err)
	}
	response, err := AccountFromStorageType(account)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.Internal, "issue while retrieving account : %v", err)
	}
	return &GetAccountResponse{Account: response}, nil
}
func (s MobilityAccountsServerImpl) GetAccountUsername(ctx context.Context, req *GetAccountUsernameRequest) (*GetAccountUsernameResponse, error) {
	account, err := s.handler.GetAccountUsername(req.Username, req.Namespace)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.AlreadyExists, "issue while retrieving account : %v", err)
	}
	response, err := AccountFromStorageType(account)
	if err != nil {
		fmt.Println(err)
		return nil, status.Errorf(codes.Internal, "issue while retrieving account : %v", err)
	}
	return &GetAccountUsernameResponse{Account: response}, nil
}
func (s MobilityAccountsServerImpl) GetAccounts(ctx context.Context, req *GetAccountsRequest) (*GetAccountsResponse, error) {
	responses, err := s.handler.GetAccounts(req.Namespaces)
	if err != nil {
		return nil, status.Errorf(codes.NotFound, "could not get accounts : %v", err)
	}
	var accounts []*Account

	for _, a := range responses {
		account, err := AccountFromStorageType(&a)
		if err != nil {
			return nil, status.Errorf(codes.Internal, "could not get accounts : %v", err)
		}
		accounts = append(accounts, account)
	}
	return &GetAccountsResponse{Accounts: accounts}, nil
}
func (s MobilityAccountsServerImpl) GetAccountsBatch(ctx context.Context, req *GetAccountsBatchRequest) (*GetAccountsBatchResponse, error) {
	responses, err := s.handler.GetAccountsBatch(req.Accountids)
	if err != nil {
		return nil, status.Errorf(codes.NotFound, "could not get accounts : %v", err)
	}
	var accounts []*Account

	for _, a := range responses {
		account, err := AccountFromStorageType(&a)
		if err != nil {
			return nil, status.Errorf(codes.Internal, "could not get accounts : %v", err)
		}
		accounts = append(accounts, account)
	}
	return &GetAccountsBatchResponse{Accounts: accounts}, nil
}
func (MobilityAccountsServerImpl) ChangePassword(ctc context.Context, req *ChangePasswordRequest) (*ChangePasswordResponse, error) {
	return nil, status.Errorf(codes.Unimplemented, "method not implemented")
}
func (MobilityAccountsServerImpl) mustEmbedUnimplementedMobilityAccountsServer() {}

func Run(done chan error, cfg *viper.Viper, handler handlers.MobilityAccountsHandler) {
	var (
		dev_env = cfg.GetBool("dev_env")
		address = ":" + cfg.GetString("services.grpc.port")
	)
	fmt.Println("-> GRPC server on", address)

	server := grpc.NewServer()
	RegisterMobilityAccountsServer(server, NewMobilityAccountsServer(handler))
	l, err := net.Listen("tcp", address)
	if err != nil {
		log.Fatal(err)
	}

	if dev_env {
		reflection.Register(server)
	}

	if err := server.Serve(l); err != nil {
		fmt.Println("gRPC service ended")
		done <- err
	}
}