// revive:disable:var-naming

// Package grpc_errcode provides a middleware to convert an errcode error to a GRPC error
package grpc_errcode

// revive:enable:var-naming

import (
	"context"

	grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
	"github.com/pingcap/errcode"
	grpcerr "github.com/pingcap/errcode/grpc"
	"google.golang.org/grpc"
)

func errorConvert(err error) error {
	if err == nil {
		return nil
	}

	if coded := errcode.CodeChain(err); coded != nil {
		return grpcerr.WrapAsGRPC(coded)
	}
	return err
}

// UnaryServerInterceptor returns a new unary server interceptors that adds zap.Logger to the context.
func UnaryServerInterceptor() grpc.UnaryServerInterceptor {
	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
		resp, err := handler(ctx, req)
		return resp, errorConvert(err)
	}
}

// StreamServerInterceptor returns a new streaming server interceptor that adds zap.Logger to the context.
func StreamServerInterceptor() grpc.StreamServerInterceptor {
	return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
		wrapped := grpc_middleware.WrapServerStream(stream)
		err := handler(srv, wrapped)
		return errorConvert(err)
	}
}