package bridge

/*
#include "stdint.h"
#include "dart_api/dart_api_dl.h"
#include "dart_api/dart_api_dl.c"
#include "dart_api/dart_native_api.h"
// Go does not allow calling C function pointers directly.
// we mock a function to call Dart_PostCObject_DL
bool GoDart_PostCObject(Dart_Port_DL port, Dart_CObject* obj) {
  return Dart_PostCObject_DL(port, obj);
}
*/
import "C"
import (
	"encoding/json"
	"fmt"
	"unsafe"
)

type DartResponse struct {
	Success bool   `json:"success"`
	Message string `json:"message"`
	Data    string `json:"data"`
}

func InitDartApi(api unsafe.Pointer) {
	if C.Dart_InitializeApiDL(api) != 0 {
		panic("failed to create dart bridge")
	} else {
		fmt.Println("Dart Api DL is initialized")
	}
}

func SendResponseToPort(port int64, response *DartResponse) {
	var obj C.Dart_CObject
	obj._type = C.Dart_CObject_kString
	responseJson, _ := json.Marshal(response)
	msg_obj := C.CString(string(responseJson)) // go string -> char*s
	// union type, we do a force convertion
	ptr := unsafe.Pointer(&obj.value[0])
	*(**C.char)(ptr) = msg_obj
	ret := C.GoDart_PostCObject(C.Dart_Port_DL(port), &obj)
	if !ret {
		fmt.Println("ERROR: post to port ", port, " failed", responseJson)
	}
}

func SendStringToPort(port int64, msg string) {
	var obj C.Dart_CObject
	obj._type = C.Dart_CObject_kString
	msg_obj := C.CString(msg) // go string -> char*s
	// union type, we do a force convertion
	ptr := unsafe.Pointer(&obj.value[0])
	*(**C.char)(ptr) = msg_obj
	ret := C.GoDart_PostCObject(C.Dart_Port_DL(port), &obj)
	if !ret {
		fmt.Println("ERROR: post to port ", port, " failed", msg)
	}
}