/*
 * Copyright 2018-present Open Networking Foundation

 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at

 * http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// The template for the tester.
// This template is filled in by the
// test driver based on the configuration.

package main

import (
	"os"
	"time"
	"os/exec"
	"strings"
	"context"
	//slog "log"
	//"google.golang.org/grpc/grpclog"
	"github.com/opencord/voltha-lib-go/v3/pkg/log"
)

func startSut(cmdStr string) (*exec.Cmd, context.CancelFunc, error) {
	var err error = nil

	cmdAry := strings.Fields(cmdStr)
	log.Infof("Running the affinity router: %s",cmdStr)
	//ctx, cncl := context.WithCancel(context.Background())
	ctx, cncl := context.WithCancel(context.Background())
	cmd := exec.CommandContext(ctx, cmdAry[0], cmdAry[1:]...)
	cmd.Stdin = os.Stdin
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	if err = cmd.Start(); err != nil {
		log.Errorf("Failed to run the affinity router: %s %v", cmdStr,err)
	}
	time.Sleep(1 * time.Second) // Give the command time to get started
	return cmd, cncl, err
}

func cleanUp(cmd *exec.Cmd, cncl context.CancelFunc) {
	cncl()
	cmd.Wait()
}

func main() {
	var err error

	// Setup logging
	if _, err = log.SetDefaultLogger(log.JSON, 1, nil); err != nil {
		log.With(log.Fields{"error": err}).Fatal("Cannot setup logging")
	}
	defer log.CleanUp()

	if len(os.Args) < 2 {
		log.Fatalf("Stat file name parameter missing for %s. Aborting...", os.Args[0])
	} else {
		statFn = os.Args[1]
	}

	if stats,err = readStats(statFn); err != nil {
		log.Error(err)
		return
	}
	defer writeStats(statFn, stats)

	// Add a stat entry for this run

	stats.appendNew()
	tsIdx :=  len(stats.TestSuites) - 1
	stats.TestSuites[tsIdx].Name = os.Args[0]


	// Initialize the servers
	if err := serverInit(); err != nil {
		log.Errorf("Error initializing server: %v", err)
		return
	}

	// Start the sofware under test
	cmd, cnclFunc, err := startSut("./{{.Command}}");
	defer cleanUp(cmd, cnclFunc)
	if  err != nil {
		return
	}

	// Initialize the clients
	if err := clientInit(); err != nil {
		log.Errorf("Error initializing client: %v", err)
		return
	}

	log.Infof("The servers are: %v",servers)

	// Run all the test cases now
	log.Infof("Executing tests")

	//log.Infof("Stats struct: %v", stats)
	runTests()

}