package win32api

import (
	"fmt"
	"syscall"
	"testing"
	"unsafe"
)

func TestClipboardReadText(t *testing.T) {
	if err := OpenClipboard(0); err != nil {
		t.Error(err)
	}
	formats, err := EnumAllClipboardFormats()
	if err != nil {
		t.Error(err)
	}
	tp := CF_UNICODETEXT
	for _, f := range formats {
		fmt.Println("Clipboard Format:", f)
		d, e := GetClipboardFormatName(f)
		fmt.Println("Clipboard Format Name:", d, e)
		if d == "HTML Format" {
			tp = RegisterClipboardFormat("HTML Format")
			fmt.Println("HTML Format:", tp)
		}
		if d == "DataObject" {
			tp = CF_HDROP
			fmt.Println("DataObject:", tp)
		}
	}

	mem, err := GetClipboardData(tp)
	if err != nil {
		t.Error(err)
	}
	p, err := GlobalLock(mem)
	if err != nil {
		t.Error(err)
	}
	defer GlobalUnlock(mem)
	//n := 0
	if tp == 13 {
		var buf []uint16
		for ptr := unsafe.Pointer(p); *(*uint16)(ptr) != 0; ptr = unsafe.Pointer(uintptr(ptr) + unsafe.Sizeof(*((*uint16)(unsafe.Pointer(p))))) {
			buf = append(buf, *(*uint16)(ptr))
		}
		str := syscall.UTF16ToString(buf)
		fmt.Println("\n\nClipboard Data:", str)
		if err := CloseClipboard(); err != nil {
			t.Error(err)
		}
		return
	}
	size, err := GlobalSize(mem)
	if err != nil {
		t.Error(err)
	}
	var buf []byte
	for i := 0; i < int(size); i++ {
		buf = append(buf, *(*byte)(unsafe.Pointer(uintptr(p) + uintptr(i))))
	}
	fmt.Println("\n\nClipboard Data:", string(buf))
	fmt.Println("Clipboard Test Done")
}