package bhsgo

/*
#include "../../src/bh_api.h"

*/
// #cgo LDFLAGS: -L/usr/local/lib -lshm_queue -lstdc++ -lpthread -lrt
import "C"

import (
	"unsafe"

	bh "basic.com/valib/c_bhomebus.git/proto/source/bhome_msg"
)

func unsafeGetBytes(p *unsafe.Pointer, s int) []byte {
	if *p == nil || s == 0 {
		return nil
	}
	return (*[0x7fffffff]byte)(*p)[:s:s]
}

func ByteSlice2String(bs []byte) string {
	return *(*string)(unsafe.Pointer(&bs))
}

/*func unsafeGetBytes(s string) []byte {
    return (*[0x7fff0000]byte)(unsafe.Pointer(
        (*reflect.StringHeader)(unsafe.Pointer(&s)).Data),
    )[:len(s):len(s)]
}*/

func getPtr(n *[]byte) unsafe.Pointer {
	if len(*n) > 0 {
		return unsafe.Pointer(&((*n)[0]))
	} else {
		return unsafe.Pointer(nil)
	}
}

func Register(proc *bh.ProcInfo, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := proc.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHRegister(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

func RegisterTopics(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHRegisterTopics(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

func Subscribe(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHSubscribeTopics(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		d := unsafeGetBytes(&creply, int(creply_len))
		reply.Unmarshal(d)
	}
	return r
}

func SubscribeNet(topics *bh.MsgTopicList, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := topics.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHSubscribeNetTopics(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

func Heartbeat(proc *bh.ProcInfo, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := proc.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHHeartbeat(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

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

func Unregister(proc *bh.ProcInfo, reply *bh.MsgCommonReply, timeout_ms int) bool {
	data, _ := proc.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHUnregister(getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

func QueryTopicAddress(dest_addr *bh.BHAddress, topic *bh.MsgQueryTopic, reply *bh.MsgQueryTopicReply, timeout_ms int) bool {
	dest, _ := dest_addr.Marshal()
	data, _ := topic.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHQueryTopicAddress(getPtr(&dest), C.int(len(dest)), getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r

}

func QueryProcs(dest_addr *bh.BHAddress, topic *bh.MsgQueryProc, reply *bh.MsgQueryProcReply, timeout_ms int) bool {
	dest, _ := dest_addr.Marshal()
	data, _ := topic.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHQueryProcs(getPtr(&dest), C.int(len(dest)), getPtr(&data), C.int(len(data)), &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		reply.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r

}

func Publish(pub *bh.MsgPublish, timeout_ms int) bool {
	data, _ := pub.Marshal()
	return C.BHPublish(getPtr(&data), 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)

	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHReadSub(&cpid, &cpid_len, &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(cpid, cpid_len)
	defer C.BHFree(creply, creply_len)
	if r {
		*proc_id = string(unsafeGetBytes(&cpid, int(cpid_len)))
		pub.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}

	return r
}

func AsyncRequest(dest_addr *bh.BHAddress, req *bh.MsgRequestTopic, msg_id *[]byte) bool {
	dest, _ := dest_addr.Marshal()
	data, _ := req.Marshal()
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHAsyncRequest(getPtr(&dest), C.int(len(dest)), getPtr(&data), C.int(len(data)), &creply, &creply_len) > 0
	defer C.BHFree(creply, creply_len)
	if r {
		*msg_id = C.GoBytes(creply, creply_len)
	}
	return r
}

func Request(dest_addr *bh.BHAddress, req *bh.MsgRequestTopic, proc_id *string, reply *bh.MsgRequestTopicReply, timeout_ms int) bool {
	dest, _ := dest_addr.Marshal()
	data, _ := req.Marshal()
	cpid := unsafe.Pointer(nil)
	cpid_len := C.int(0)

	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHRequest(getPtr(&dest), C.int(len(dest)), getPtr(&data), C.int(len(data)), &cpid, &cpid_len, &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(cpid, cpid_len)
	defer C.BHFree(creply, creply_len)
	if r {
		// *proc_id = string(C.GoBytes(cpid, cpid_len))
		// reply.Unmarshal(C.GoBytes(creply, creply_len))
		*proc_id = string(unsafeGetBytes(&cpid, int(cpid_len)))
		reply.Unmarshal(unsafeGetBytes(&creply, int(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)

	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHReadRequest(&cpid, &cpid_len, &creply, &creply_len, psrc, C.int(timeout_ms)) > 0
	defer C.BHFree(cpid, cpid_len)
	defer C.BHFree(creply, creply_len)
	if r {
		// *proc_id = string(C.GoBytes(cpid, cpid_len))
		// req.Unmarshal(C.GoBytes(creply, creply_len))
		*proc_id = string(unsafeGetBytes(&cpid, int(cpid_len)))
		req.Unmarshal(unsafeGetBytes(&creply, int(creply_len)))
	}
	return r
}

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

func GetLastError() (int, string) {
	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHGetLastError(&creply, &creply_len)
	defer C.BHFree(creply, creply_len)
	// return int(r), string(C.GoBytes(creply, creply_len))
	return int(r), string(unsafeGetBytes(&creply, int(creply_len)))

}

func Cleanup() {
	C.BHCleanup()
}

// ///////////////////////////////////////////////////
func Request2(dest_addr *bh.BHAddress, data []byte, proc_id *string, replyPtr *unsafe.Pointer, replyLen *int, timeout_ms int) bool {
	dest, _ := dest_addr.Marshal()
	cpid := unsafe.Pointer(nil)
	cpid_len := C.int(0)

	creply := unsafe.Pointer(nil)
	creply_len := C.int(0)

	r := C.BHRequest(getPtr(&dest), C.int(len(dest)), getPtr(&data), C.int(len(data)), &cpid, &cpid_len, &creply, &creply_len, C.int(timeout_ms)) > 0
	defer C.BHFree(cpid, cpid_len)
	if r {
		*proc_id = string(unsafeGetBytes(&cpid, int(cpid_len)))
		*replyPtr = creply
		*replyLen = int(creply_len)
	}
	return r
}
func CFree(p unsafe.Pointer, size int) {
	if p != nil {
		C.BHFree(p, C.int(size))
	}
}
func SendReply2(src unsafe.Pointer, data []byte) bool {
	return C.BHSendReply(src, getPtr(&data), C.int(len(data))) > 0
}