package grpc

import (
	"context"
	"git.sch9.ru/new_gate/ms-auth/internal/models"
	"git.sch9.ru/new_gate/ms-auth/internal/users"
	userv1 "git.sch9.ru/new_gate/ms-auth/pkg/go/gen/proto/user/v1"
	"git.sch9.ru/new_gate/ms-auth/pkg/utils"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"
	"google.golang.org/protobuf/types/known/emptypb"
)

type userHandlers struct {
	userv1.UnimplementedUserServiceServer
	userUC users.UseCase
}

func NewUserHandlers(gserver *grpc.Server, userUC users.UseCase) {
	handlers := &userHandlers{
		userUC: userUC,
	}

	userv1.RegisterUserServiceServer(gserver, handlers)
}

func (h *userHandlers) CreateUser(ctx context.Context, req *userv1.CreateUserRequest) (*userv1.CreateUserResponse, error) {
	user := req.GetUser()
	if user == nil {
		return nil, status.Errorf(codes.Unknown, "") // FIXME
	}
	id, err := h.userUC.CreateUser(
		ctx,
		&models.User{
			Username:  utils.AsStringP(user.GetUsername()),
			Password:  utils.AsStringP(user.GetPassword()),
			Email:     nil,
			ExpiresAt: utils.TimeP(user.ExpiresAt),
			Role:      AsMRoleP(user.GetRole()),
		},
	)
	if err != nil {
		return nil, status.Errorf(codes.Unknown, err.Error()) // FIXME
	}

	return &userv1.CreateUserResponse{
		Id: id,
	}, nil
}

func (h *userHandlers) ReadUser(ctx context.Context, req *userv1.ReadUserRequest) (*userv1.ReadUserResponse, error) {
	user, err := h.userUC.ReadUser(
		ctx,
		req.GetId(),
	)
	if err != nil {
		return nil, status.Errorf(codes.Unknown, err.Error()) // FIXME
	}

	return &userv1.ReadUserResponse{
		User: &userv1.ReadUserResponse_User{
			Id:        *user.Id,
			Username:  *user.Username,
			ExpiresAt: utils.TimestampP(user.ExpiresAt),
			CreatedAt: utils.TimestampP(user.CreatedAt),
			Role:      *AsRoleP(user.Role),
		},
	}, nil
}

func (h *userHandlers) UpdateUser(ctx context.Context, req *userv1.UpdateUserRequest) (*emptypb.Empty, error) {
	user := req.GetUser()
	if user == nil {
		return nil, status.Errorf(codes.Unknown, "") // FIXME
	}
	err := h.userUC.UpdateUser(
		ctx,
		&models.User{
			Id:        utils.AsInt32P(user.GetId()),
			Username:  utils.AsStringP(user.GetUsername()),
			Password:  utils.AsStringP(user.GetPassword()),
			Email:     nil,
			ExpiresAt: utils.TimeP(user.ExpiresAt),
			Role:      AsMRoleP(user.GetRole()),
		},
	)
	if err != nil {
		return nil, status.Errorf(codes.Unknown, err.Error()) // FIXME
	}
	return &emptypb.Empty{}, nil
}

func (h *userHandlers) DeleteUser(ctx context.Context, req *userv1.DeleteUserRequest) (*emptypb.Empty, error) {
	err := h.userUC.DeleteUser(
		ctx,
		req.GetId(),
	)
	if err != nil {
		return nil, status.Errorf(codes.Unknown, err.Error()) // FIXME
	}
	return &emptypb.Empty{}, nil
}

func AsMRoleP(v userv1.Role) *models.Role {
	vv := models.Role(v.Number())
	return &vv
}

func AsRoleP(r *models.Role) *userv1.Role {
	if r == nil {
		return nil
	}
	rr := userv1.Role(*r)
	return &rr
}