package httpclent

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"io"
	"io/ioutil"
	"net/url"
	"time"

	"git.shuncheng.lu/bigthing/gocommon/pkg/net/auth"
	"git.shuncheng.lu/bigthing/gocommon/pkg/net/nacos"

	"net/http"
)

var (
	NacosServerHostOption Option = func(options *Options) {
		options.ServerHostUrl = NacosServerHost
	}
	QconfServerHostOption Option = func(options *Options) {
		options.ServerHostUrl = DefaultServerHost
	}
	DomainServerHostOption Option = func(options *Options) {
		options.ServerHostUrl = DomainServerHost
	}
)

var (
	SetUrlRequestParams = func(values url.Values) HandlerRequestUrl {
		return func(ctx context.Context, _url *url.URL) error {
			_url.RawQuery = values.Encode()
			return nil
		}
	}
)

var (
	DefaultTimeOut2sOp = func(op *Options) {
		op.TimeOut = 2 * time.Second
	}
	DefaultTimeOut3sOp = func(op *Options) {
		op.TimeOut = 3 * time.Second
	}
	DefaultTimeOut4sOp = func(op *Options) {
		op.TimeOut = 4 * time.Second
	}
	DefaultTimeOut5sOp = func(op *Options) {
		op.TimeOut = 5 * time.Second
	}
	// 关闭重试
	CloseRetry = func(op *Options) {
		op.RetryMaxNum = -1
	}
	// 默认处理
	DefaultHandlerRequestParams HandlerRequestParams = func(ctx context.Context, oldReq interface{}) (newReq interface{}) {
		return RequestParams{"params": oldReq}
	}
	// 默认处理
	DefaultHandlerRequestHandler HandlerRequestHeader = func(ctx context.Context, header http.Header) {
		header.Add("Content-Type", "application/json")
		header.Add("Service-Token", auth.GenerateToken(getServerName(ctx)))
	}
	DefaultServerHost ServerHostUrl = func(ctx context.Context, serverName string) (s string, e error) {
		return GetServerUrl(serverName)
	}
	NacosServerHost ServerHostUrl = func(ctx context.Context, serverName string) (s string, e error) {
		return nacos.GetHost(serverName)
	}
	DomainServerHost ServerHostUrl = func(ctx context.Context, serverName string) (s string, e error) {
		return nacos.GetDomainHost(serverName)
	}

	DefaultEncodeRequestBody EncodeRequestBody = func(ctx context.Context, params interface{}) (reader io.Reader, e error) {
		if params == nil {
			return nil, nil
		}
		buf := bytes.Buffer{}
		if err := json.NewEncoder(&buf).Encode(params); err != nil {
			return nil, fmtError("[DefaultEncodeRequestBody] err,err=%+v,req=%+v", err, params)
		}
		return ioutil.NopCloser(&buf), nil
	}
)

var (
	// error
	validateNilError  = errors.New("the result can not be null")
	validateTypeError = errors.New("the result must be a pointer type")
)

const (
	defaultRetryNum      = 2          //默认重试2次，带上第一次请求，一共请求3次
	defaultMethod        = MethodPost //默认Post请求
	defaultScheme        = SchemeHttp
	defaultTimeOut1s     = 1 * time.Second      //默认超时时间1s
	defaultRetryIdleTime = 1 * time.Millisecond // 默认空闲时间是1ms
)