package keeper

import (
	"context"
	"fmt"

	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"

	proto "github.com/gogo/protobuf/proto"

	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/x/auth/types"
)

var _ types.QueryServer = AccountKeeper{}

// Account returns account details based on address
func (ak AccountKeeper) Account(c context.Context, req *types.QueryAccountRequest) (*types.QueryAccountResponse, error) {
	if req == nil {
		return nil, status.Errorf(codes.InvalidArgument, "empty request")
	}

	if req.Address.Empty() {
		return nil, status.Error(codes.InvalidArgument, "Address cannot be empty")
	}

	ctx := sdk.UnwrapSDKContext(c)
	account := ak.GetAccount(ctx, req.Address)
	if account == nil {
		return nil, status.Errorf(codes.NotFound, "account %s not found", req.Address)
	}

	acc, err := ConvertAccount(account)
	if err != nil {
		return nil, status.Errorf(codes.Internal, err.Error())
	}

	return &types.QueryAccountResponse{Account: acc}, nil
}

// Params returns parameters of auth module
func (ak AccountKeeper) Params(c context.Context, req *types.QueryParamsRequest) (*types.QueryParamsResponse, error) {
	if req == nil {
		return nil, status.Error(codes.InvalidArgument, "empty request")
	}
	ctx := sdk.UnwrapSDKContext(c)
	params := ak.GetParams(ctx)

	return &types.QueryParamsResponse{Params: params}, nil
}

// ConvertAccount converts AccountI to Any type
func ConvertAccount(account types.AccountI) (*codectypes.Any, error) {
	msg, ok := account.(proto.Message)
	if !ok {
		return nil, fmt.Errorf("can't protomarshal %T", msg)
	}

	any, err := codectypes.NewAnyWithValue(msg)
	if err != nil {
		return nil, err
	}

	return any, nil
}