package micro

import (
	"context"
	"dashoo.cn/micro_libary/gtoken"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/os/gctx"
	"github.com/gogf/gf/v2/text/gstr"
	"github.com/rcrowley/go-metrics"
	"github.com/rpcxio/rpcx-consul/serverplugin"
	"github.com/smallnest/rpcx/protocol"
	"github.com/smallnest/rpcx/server"
	"github.com/smallnest/rpcx/share"
	"strings"
	"time"
)

const Tenant = "Tenant"

func CreateAndInitService(basePath string) *server.Server {
	var ctx = gctx.New()
	bindAddr, _ := g.Config().Get(ctx, "setting.bind-addr")
	registryType, _ := g.Config().Get(ctx, "setting.registry-type")
	registryAddr, _ := g.Config().Get(ctx, "setting.registry-addr")

	s := server.NewServer()

	g.Log().Infof(context.Background(), "服务启动, BindName: %v, BindAddr: %s", basePath, bindAddr.String())

	if registryType.String() == "consul" {
		addConsulRegistryPlugin(ctx, s, basePath, bindAddr.String(), registryAddr.String())
	}

	return s
}

func addConsulRegistryPlugin(ctx context.Context, s *server.Server, basePath, srvAddr, consulAddr string) {
	r := &serverplugin.ConsulRegisterPlugin{
		ServiceAddress: "tcp@" + srvAddr,
		ConsulServers:  []string{consulAddr},
		BasePath:       basePath,
		Metrics:        metrics.NewRegistry(),
		UpdateInterval: time.Minute,
	}
	err := r.Start()
	if err != nil {
		g.Log().Fatal(ctx, err)
	}
	g.Log().Infof(ctx, "注册到Consul: %v, basePath: %v, MicorSrv: %v", consulAddr, basePath, srvAddr)
	s.Plugins.Add(r)
}

// HandleAuth 处理身份验证
func HandleAuth(ctx context.Context, req *protocol.Message, token string, authExcludePaths []string) error {
	tenant := getTenant(req)
	g.Log().Infof(ctx, " ServicePath: %s, ServiceMethod: %s，Tenant：%s", req.ServicePath, req.ServiceMethod, tenant)

	reqPath := "/" + req.ServicePath + "/" + req.ServiceMethod
	if authPath(reqPath, authExcludePaths) {
		req.Metadata["authExclude"] = "false"
		var rsp gtoken.Resp
		notAuthSrv := ctx.Value("NotAuthSrv")
		if notAuthSrv != nil && notAuthSrv.(bool) {
			rsp = gtoken.GFToken.ValidToken(ctx, token)
		} else {
			ctx = context.WithValue(ctx, share.ReqMetaDataKey, map[string]string{"tenant": tenant})
			rsp = validToken(ctx, token)
		}

		if rsp.Code != 0 && rsp.Code != 200 {
			return gerror.New("Token 认证失败！")
		}
		if req.Metadata != nil {
			req.Metadata["userInfo"] = rsp.DataString()
		}
		return nil
	}
	return nil
}

// 判断路径是否需要进行认证拦截
// return true 需要认证
func authPath(urlPath string, authExcludePaths []string) bool {
	// 去除后斜杠
	if strings.HasSuffix(urlPath, "/") {
		urlPath = gstr.SubStr(urlPath, 0, len(urlPath)-1)
	}

	// 排除路径处理，到这里nextFlag为true
	for _, excludePath := range authExcludePaths {
		tmpPath := excludePath
		// 前缀匹配
		if strings.HasSuffix(tmpPath, "/*") {
			tmpPath = gstr.SubStr(tmpPath, 0, len(tmpPath)-2)
			if gstr.HasPrefix(urlPath, tmpPath) {
				// 前缀匹配不拦截
				return false
			}
		} else {
			// 全路径匹配
			if strings.HasSuffix(tmpPath, "/") {
				tmpPath = gstr.SubStr(tmpPath, 0, len(tmpPath)-1)
			}
			if urlPath == tmpPath {
				// 全路径匹配不拦截
				return false
			}
		}
	}
	return true
}

// 验证token
func validToken(ctx context.Context, token string) gtoken.Resp {
	grsp := gtoken.Resp{}
	if token == "" {
		grsp.Code = 401
		grsp.Msg = "valid token empty"
		return grsp
	}

	authService := InitMicroSrvClient(ctx, "Auth", "micro_srv.auth")
	defer authService.Close()
	rsp := &gtoken.Resp{}
	err := authService.Call(ctx, "ValidToken", token, rsp)
	if err != nil {
		g.Log().Error(ctx, err)
		grsp.Code = 401
		return grsp
	}
	grsp.Code = int(rsp.Code)
	grsp.Msg = rsp.Msg
	grsp.Data = rsp.Data
	return grsp
}

func getTenant(msg *protocol.Message) string {
	var tenant string
	if msg.Metadata != nil {
		tenant = msg.Metadata[Tenant]
	}
	return tenant
}