// Copyright 2020 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package pd

import (
	"context"
	"time"

	"github.com/pingcap/log"
	"go.etcd.io/etcd/clientv3"
	"go.uber.org/fx"
	"go.uber.org/zap"

	"github.com/pingcap/tidb-dashboard/pkg/config"
	"github.com/pingcap/tidb-dashboard/pkg/utils"
)

func NewEtcdClient(lc fx.Lifecycle, config *config.Config) (*clientv3.Client, error) {
	zapCfg := zap.NewProductionConfig()
	zapCfg.Encoding = log.ZapEncodingName

	cli, err := clientv3.New(clientv3.Config{
		Endpoints:            []string{config.PDEndPoint},
		AutoSyncInterval:     30 * time.Second,
		DialTimeout:          5 * time.Second,
		DialKeepAliveTime:    utils.DefaultGRPCKeepaliveParams.Time,
		DialKeepAliveTimeout: utils.DefaultGRPCKeepaliveParams.Timeout,
		PermitWithoutStream:  utils.DefaultGRPCKeepaliveParams.PermitWithoutStream,
		DialOptions:          utils.DefaultGRPCDialOptions,
		TLS:                  config.ClusterTLSConfig,
		LogConfig:            &zapCfg,
	})

	lc.Append(fx.Hook{
		OnStop: func(context.Context) error {
			return cli.Close()
		},
	})

	return cli, err
}