package HikNetSDK

import (
	"fmt"
	"github.com/ebitengine/purego"
	"runtime"
	"unsafe"
)

var libc uintptr

var (
	DvrInit func() int

	newHIKBallCamera func() unsafe.Pointer
	initBallCamera   func(core unsafe.Pointer, ip string, port string, username string, password string, BallMachineType string, ErrorCode unsafe.Pointer, ErrorInfo *byte) bool
	ballCameraLogout func(core unsafe.Pointer, ErrorCode unsafe.Pointer, ErrorInfo *byte) bool
	ptzTo            func(core unsafe.Pointer, Action int, P float32, T float32, Z float32) bool
	ptzGet           func(unsafe.Pointer, unsafe.Pointer, unsafe.Pointer, unsafe.Pointer) bool
	stopBus          func(unsafe.Pointer, int) bool
	startBus         func(unsafe.Pointer, int, int) bool

	newHIKNvr                func() unsafe.Pointer
	initNvr                  func(unsafe.Pointer, string, string, string, string, int) bool
	checkTimeRegionWithMonth func(core unsafe.Pointer, year int, month int) string
	checkTimeRegionWithDay   func(core unsafe.Pointer, year int, month int, day int) string
	nvrUTCDiff               func(core unsafe.Pointer) int
)

func Init() {
	var err error
	libc, err = openLibrary(getSystemLibrary())
	if err != nil {
		panic(err)
	}

	purego.RegisterLibFunc(&DvrInit, libc, "DVR_Init")

	purego.RegisterLibFunc(&newHIKBallCamera, libc, "NewHIKBallCamera")
	purego.RegisterLibFunc(&initBallCamera, libc, "InitBallCamera")
	purego.RegisterLibFunc(&ptzTo, libc, "PtzGotoPut")
	purego.RegisterLibFunc(&ptzGet, libc, "PtzGet")
	purego.RegisterLibFunc(&stopBus, libc, "StopBus")
	purego.RegisterLibFunc(&startBus, libc, "StartBus")

	purego.RegisterLibFunc(&newHIKNvr, libc, "NewHIKNvr")
	purego.RegisterLibFunc(&initNvr, libc, "InitNvr")
	purego.RegisterLibFunc(&checkTimeRegionWithMonth, libc, "CheckTimeRegionWithMonth")
	purego.RegisterLibFunc(&checkTimeRegionWithDay, libc, "CheckTimeRegionWithDay")
	purego.RegisterLibFunc(&nvrUTCDiff, libc, "NvrUTCDiff")

}

func getSystemLibrary() string {
	switch runtime.GOOS {
	case "linux":
		if runtime.GOARCH == "amd64" || runtime.GOARCH == "386" {
			return "libHikNetSDKPkg_linux_amd64.so"
		} else {
			return "libHikNetSDKPkg_linux_arm64.so"
		}
	case "windows":
		return "HikNetSDKPkg_win_amd64.dll"
	default:
		panic(fmt.Errorf("GOOS=%s is not supported", runtime.GOOS))
	}
}