// Copyright (C) 2016 Sebastian 'tokkee' Harl <sh@tokkee.org>
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

// client implements a simple client for the backend protocol.
package main

import (
	"flag"
	"log"

	"golang.org/x/net/context"
	"google.golang.org/grpc"

	pb "tokkee.org/go-talk/grpc/proto/backend"
)

var (
	server = flag.String("server", "localhost:50051", "server address")
)

func main() {
	ctx := context.Background()
	flag.Parse()

	if flag.NArg() != 1 {
		log.Fatal("Missing query.")
	}
	query := flag.Arg(0)

	conn, err := grpc.Dial(*server, grpc.WithInsecure())
	if err != nil {
		log.Fatalf("Failed to connect to server at %s: %v", *server, err)
	}
	defer conn.Close()

	c := pb.NewBackendClient(conn)
	res, err := c.Query(ctx, &pb.QueryRequest{Query: query})
	if err != nil {
		log.Fatalf("Query failed: %v", err)
	}
	log.Printf("%s: %d\n", res.Type, res.N)
}