// Package restyclient for http client
package restyclient

import (
	"context"
	"crypto/tls"
	"net"
	"net/http"
	"sync"
	"time"

	"github.com/go-resty/resty/v2"
	"github.com/google/uuid"
	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)

const (
	timeout = time.Second * 30
)

var (
	clientOnce         sync.Once
	silentClientOnce   sync.Once
	globalClient       *resty.Client
	globalSilentClient *resty.Client
)

var dialer = &net.Dialer{
	Timeout:   30 * time.Second,
	KeepAlive: 30 * time.Second,
}

// defaultTransport default transport
var defaultTransport http.RoundTripper = &http.Transport{
	DialContext:           dialer.DialContext,
	ForceAttemptHTTP2:     true,
	MaxIdleConns:          100,
	IdleConnTimeout:       90 * time.Second,
	TLSHandshakeTimeout:   10 * time.Second,
	ExpectContinueTimeout: 1 * time.Second,
	// NOCC:gas/tls(设计如此)
	TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, // nolint
}

// New : 新建 Client, 设置公共参数，tracing 等; 每次新建，cookies不复用
func New() *resty.Client {
	if globalClient == nil {
		clientOnce.Do(func() {
			globalClient = resty.New().
				SetTransport(otelhttp.NewTransport(defaultTransport)).
				SetTimeout(timeout).
				SetCookieJar(nil).
				SetDebugBodyLimit(1024).
				OnAfterResponse(restyAfterResponseHook).
				SetPreRequestHook(restyBeforeRequestHook).
				OnError(restyErrHook).
				SetHeader("User-Agent", "restyclient")
		})
	}
	return globalClient
}

// silentNew 安静模式，只打印错误日志
func silentNew() *resty.Client {
	if globalSilentClient == nil {
		silentClientOnce.Do(func() {
			globalSilentClient = resty.New().
				SetTransport(otelhttp.NewTransport(defaultTransport)).
				SetTimeout(timeout).
				SetCookieJar(nil).
				SetDebugBodyLimit(1024).
				// OnAfterResponse(restyAfterResponseHook).
				// SetPreRequestHook(restyBeforeRequestHook).
				OnError(restyErrHook).
				SetHeader("User-Agent", "envmgr-restyclient")
		})
	}
	return globalSilentClient
}

// R : New().R() 快捷方式, 已设置公共参数，tracing 等
func R() *resty.Request {
	return New().R()
}

// SilentR : 安静模式，只打印错误日志 已设置公共参数，tracing 等, 只打印错误日志
func SilentR() *resty.Request {
	return silentNew().R()
}

// GenRequestID 生产 request_id
func GenRequestID() string {
	id, _ := uuid.NewRandom()
	return id.String()
}

// WithRequestID 设置 request_id
func WithRequestID(ctx context.Context, id string) context.Context {
	newCtx := context.WithValue(ctx, requestIDCtxKey, id)
	return newCtx
}