package main

/*
#include "bh_api_go.h"

*/
// #cgo LDFLAGS: -L/home/lichao/code/shmsg/build/lib -L/usr/local/lib -lbhome_shmq -lbhome_msg -lprotobuf-lite -lstdc++ -lpthread -lrt
import "C"

import (
	bh "bhome_node/bhome_msg"
	"fmt"
	"time"
	"unsafe"
)

func BHApiIn1Out1(bhfunc C.FBHApiIn1Out1, data []byte, reply *bh.MsgCommonReply, timeout_ms int) bool {
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)
	r := C.BHApiIn1Out1Proxy(bhfunc, unsafe.Pointer(&data[0]), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	if r {
		reply.Unmarshal(C.GoBytes(creply, creply_len))
	}
	return r

}

func Register(proc *bh.ProcInfo, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := proc.Marshal()
	return BHApiIn1Out1(C.FBHApiIn1Out1(C.BHRegister), data, reply, timeout_ms)
}

func RegisterTopics(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	return BHApiIn1Out1(C.FBHApiIn1Out1(C.BHRegisterTopics), data, reply, timeout_ms)
}

func Subscribe(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	return BHApiIn1Out1(C.FBHApiIn1Out1(C.BHSubscribeTopics), data, reply, timeout_ms)
}

func Heartbeat(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	return BHApiIn1Out1(C.FBHApiIn1Out1(C.BHHeartbeat), data, reply, timeout_ms)
}

func HeartbeatEasy(timeout_ms int) bool {
	return C.BHHeartbeatEasy(C.int(timeout_ms)) > 0
}

func Publish(pub *bh.MsgPublish, timeout_ms int) bool {
	data, _ := pub.Marshal()
	return C.BHPublish(unsafe.Pointer(&data[0]), C.int(len(data)), C.int(timeout_ms)) > 0
}

func ReadSub(proc_id *string, pub *bh.MsgPublish, timeout_ms int) bool {
	cpid := unsafe.Pointer(nil)
	cpid_len := C.int(0)
	defer C.BHFree(cpid, cpid_len)
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)

	r := C.BHReadSub(&cpid, &cpid_len, &creply, &creply_len, C.int(timeout_ms)) > 0
	*proc_id = string(C.GoBytes(cpid, cpid_len))
	pub.Unmarshal(C.GoBytes(creply, creply_len))
	return r
}

func AsyncRequest(req *bh.MsgRequestTopic, msg_id *[]byte) bool {
	data, _ := req.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)
	r := C.BHAsyncRequest(unsafe.Pointer(&data[0]), C.int(len(data)), &creply, &creply_len) > 0
	if r {
		*msg_id = C.GoBytes(creply, creply_len)
	}
	return r
}

func Request(req *bh.MsgRequestTopic, proc_id *string, reply *bh.MsgRequestTopicReply, timeout_ms int) bool {
	data, _ := req.Marshal()
	cpid := unsafe.Pointer(nil)
	cpid_len := C.int(0)
	defer C.BHFree(cpid, cpid_len)
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)
	r := C.BHRequest(unsafe.Pointer(&data[0]), C.int(len(data)), &cpid, &cpid_len, &creply, &creply_len, C.int(timeout_ms)) > 0
	if r {
		*proc_id = string(C.GoBytes(cpid, cpid_len))
		reply.Unmarshal(C.GoBytes(creply, creply_len))
	}
	return r
}

func ReadRequest(proc_id *string, req *bh.MsgRequestTopic, psrc *unsafe.Pointer, timeout_ms int) bool {
	cpid := unsafe.Pointer(nil)
	cpid_len := C.int(0)
	defer C.BHFree(cpid, cpid_len)
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)
	r := C.BHReadRequest(&cpid, &cpid_len, &creply, &creply_len, psrc, C.int(timeout_ms)) > 0
	if r {
		*proc_id = string(C.GoBytes(cpid, cpid_len))
		req.Unmarshal(C.GoBytes(creply, creply_len))
	}
	return r
}

func SendReply(src unsafe.Pointer, rep *bh.MsgRequestTopicReply) bool {
	data, _ := rep.Marshal()
	return C.BHSendReply(src, unsafe.Pointer(&data[0]), C.int(len(data))) > 0
}

func GetLastError() (int, string) {
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)
	defer C.BHFree(creply, creply_len)
	r := C.BHGetLastError(&creply, &creply_len)
	return int(r), string(C.GoBytes(creply, creply_len))

}

type ServerCB func(src unsafe.Pointer, proc_id *string, req *bh.MsgRequestTopic)
type ClientCB func(proc_id *string, msg_id *[]byte, reply *bh.MsgRequestTopicReply)
type SubDataCB func(proc_id *string, pub *bh.MsgPublish)

var cgoServerCB ServerCB
var cgoClientCB ClientCB
var cgoSubDataCB SubDataCB

//export CGoSubDataCallback
func CGoSubDataCallback(cpid C.PCVoid, pid_len C.int, data C.PCVoid, data_len C.int) {
	proc_id := string(C.GoBytes(unsafe.Pointer(cpid), pid_len))
	msg := bh.MsgPublish{}
	msg.Unmarshal(C.GoBytes(unsafe.Pointer(data), data_len))
	cgoSubDataCB(&proc_id, &msg)
}

//export CGoServerCallback
func CGoServerCallback(cpid C.PCVoid, pid_len C.int, data C.PCVoid, data_len C.int, src unsafe.Pointer) {
	proc_id := string(C.GoBytes(unsafe.Pointer(cpid), pid_len))
	msg := bh.MsgRequestTopic{}
	msg.Unmarshal(C.GoBytes(unsafe.Pointer(data), data_len))
	cgoServerCB(src, &proc_id, &msg)
}

//export CGoClientCallback
func CGoClientCallback(cpid C.PCVoid, pid_len C.int, msgid C.PCVoid, msgid_len C.int, data C.PCVoid, data_len C.int) {
	proc_id := string(C.GoBytes(unsafe.Pointer(cpid), pid_len))
	msg_id := C.GoBytes(unsafe.Pointer(msgid), msgid_len)
	var msg bh.MsgRequestTopicReply
	msg.Unmarshal(C.GoBytes(unsafe.Pointer(data), data_len))
	cgoClientCB(&proc_id, &msg_id, &msg)
}

func StartWorker(c ClientCB, s ServerCB, sub SubDataCB) {
	cgoClientCB = c
	cgoServerCB = s
	cgoSubDataCB = sub
	C.CGoStartWorker()
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// user code:

func ServerCallback(src unsafe.Pointer, proc_id *string, req *bh.MsgRequestTopic) {
	fmt.Println("user server cb called, request topic: " + string(req.Topic) + ", data:" + string(req.Data))
	reply := bh.MsgRequestTopicReply{}
	reply.Data = []byte("reply 1234")
	SendReply(src, &reply)
}

func SubDataCallback(proc_id *string, pub *bh.MsgPublish) {
	fmt.Println("user sub data cb called")
}
func ClientCallback(proc_id *string, msg_id *[]byte, reply *bh.MsgRequestTopicReply) {
	fmt.Println("user client cb reply: " + string(reply.Data))
}

func main() {
	proc_id := "test_proc"
	proc := bh.ProcInfo{}
	proc.ProcId = []byte(proc_id)
	reply := bh.MsgCommonReply{}

	StartWorker(ClientCallback, ServerCallback, SubDataCallback)

	r := Register(&proc, &reply, 1000)
	if r {
		fmt.Println("register ok")
	} else {
		fmt.Println("register failed")
		return
	}

	r = HeartbeatEasy(1000)
	if r {
		fmt.Println("heartbeat ok")
	} else {
		fmt.Println("heartbeat failed")
	}

	topics := bh.MsgTopicList{}
	topics.TopicList = append(topics.TopicList, []byte("topic0"), []byte("topic1"))
	RegisterTopics(&topics, &reply, 0)
	if r {
		fmt.Println("reg topics ok")
	} else {
		fmt.Println("reg topics failed")
	}
	req := bh.MsgRequestTopic{}
	time.Sleep(time.Second * 1)
	req.Topic = []byte("topic0")
	req.Data = []byte("data0")
	// var msg_id []byte
	// AsyncRequest(&req, &msg_id)
	// fmt.Println(msg_id)
	// time.Sleep(time.Second * 5)

	pid := ""
	rr := bh.MsgRequestTopicReply{}
	for i := 0; i < 10000; i++ {
		if Request(&req, &pid, &rr, 3000) {
			fmt.Println("server:" + pid + ", reply:" + string(rr.Data))
		} else {
			e, s := GetLastError()
			fmt.Println("ec:", e, ", msg:"+s)
		}
	}

}