package client

import (
	"context"
	"errors"
	"fmt"
	"git.oa00.com/supply-chain/service/config"
	consulClient "github.com/rpcxio/rpcx-consul/client"
	"github.com/smallnest/rpcx/client"
	"log"
	"reflect"
	"strings"
	"sync"
	"time"
)

var mClient = sync.Map{}
var mutex = sync.Mutex{}
var basePkgPath string

type empty int

func init() {
	pkgPath := reflect.TypeOf(empty(0)).PkgPath()
	basePkgPath = pkgPath[:len(pkgPath)-6]
}

type RpcClient struct {
	baseName    string
	serviceName string
	client      client.XClient
}

// Call @Title 调用接口
func (r RpcClient) Call(ctx context.Context, serviceMethod string, args interface{}, reply interface{}) (err error) {
	if config.RpcConfig.BeforeHandel != nil {
		ctx, err = config.RpcConfig.BeforeHandel(ctx, r.baseName, r.serviceName, serviceMethod, args, reply)
		if err != nil {
			return err
		}
	}
	// 调用请求
	err = r.client.Call(ctx, serviceMethod, args, reply)
	if config.RpcConfig.AfterHandel != nil {
		err = config.RpcConfig.AfterHandel(ctx, r.baseName, r.serviceName, serviceMethod, args, reply, err)
	}
	return err
}

// GetClient @Title 获取RPC客户的
func GetClient(s interface{}) (*RpcClient, error) {
	path := strings.TrimPrefix(reflect.ValueOf(s).Elem().Type().PkgPath(), basePkgPath)
	actionName := reflect.ValueOf(s).Elem().Type().Name()
	key := path + "/" + actionName
	split := strings.SplitN(key, "/", 2)
	basePath := split[0]
	servicePath := split[1]
	xClient, ok := mClient.Load(key)
	if !ok {
		mutex.Lock()
		xClient, ok = mClient.Load(key)
		if !ok {
			d, err := consulClient.NewConsulDiscovery(basePath, servicePath, config.RpcConfig.RegistryServer, nil)
			if err != nil {
				return nil, errors.New("系统异常")
			}
			option := client.DefaultOption
			option.Retries = 3
			option.GenBreaker = func() client.Breaker {
				return client.NewConsecCircuitBreaker(2, 30*time.Second)
			}
			xClient = client.NewXClient(servicePath, client.Failover, client.RoundRobin, d, option)
			mClient.Store(key, xClient)
		}
		mutex.Unlock()
	}
	return &RpcClient{client: xClient.(client.XClient), baseName: basePath, serviceName: servicePath}, nil
}

// GetClientName @Title 根据服务名获取客户端
func GetClientName(base, service string) (*RpcClient, error) {
	key := fmt.Sprintf("%s/%s", base, service)
	xClient, ok := mClient.Load(key)
	if !ok {
		mutex.Lock()
		xClient, ok = mClient.Load(key)
		if !ok {
			d, err := consulClient.NewConsulDiscovery(base, service, config.RpcConfig.RegistryServer, nil)
			if err != nil {
				log.Println(err)
				return nil, errors.New("系统异常")
			}
			option := client.DefaultOption
			option.Retries = 3
			option.GenBreaker = func() client.Breaker {
				return client.NewConsecCircuitBreaker(2, 30*time.Second)
			}
			xClient = client.NewXClient(service, client.Failover, client.RoundRobin, d, option)
			mClient.Store(key, xClient)
		}
		mutex.Unlock()
	}
	return &RpcClient{client: xClient.(client.XClient), baseName: base, serviceName: service}, nil
}