//go:build windows

package webview2

import (
	"golang.org/x/sys/windows"
	"syscall"
	"unsafe"
)

type ICoreWebView2HttpRequestHeadersVtbl struct {
	IUnknownVtbl
	GetHeader    ComProc
	GetHeaders   ComProc
	Contains     ComProc
	SetHeader    ComProc
	RemoveHeader ComProc
	GetIterator  ComProc
}

type ICoreWebView2HttpRequestHeaders struct {
	Vtbl *ICoreWebView2HttpRequestHeadersVtbl
}

func (i *ICoreWebView2HttpRequestHeaders) AddRef() uintptr {
	refCounter, _, _ := i.Vtbl.AddRef.Call(uintptr(unsafe.Pointer(i)))
	return refCounter
}

func (i *ICoreWebView2HttpRequestHeaders) GetHeader(name string) (string, error) {

	// Convert string 'name' to *uint16
	_name, err := UTF16PtrFromString(name)
	if err != nil {
		return "", nil
	} // Create *uint16 to hold result
	var _value *uint16

	hr, _, _ := i.Vtbl.GetHeader.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(_name)),
		uintptr(unsafe.Pointer(_value)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return "", syscall.Errno(hr)
	}
	// Get result and cleanup
	value := UTF16PtrToString(_value)
	CoTaskMemFree(unsafe.Pointer(_value))
	return value, nil
}

func (i *ICoreWebView2HttpRequestHeaders) GetHeaders(name string) (*ICoreWebView2HttpHeadersCollectionIterator, error) {

	// Convert string 'name' to *uint16
	_name, err := UTF16PtrFromString(name)
	if err != nil {
		return nil, err
	}
	var value *ICoreWebView2HttpHeadersCollectionIterator

	hr, _, _ := i.Vtbl.GetHeaders.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(_name)),
		uintptr(unsafe.Pointer(&value)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return nil, syscall.Errno(hr)
	}
	return value, nil
}

func (i *ICoreWebView2HttpRequestHeaders) Contains(name string) (bool, error) {

	// Convert string 'name' to *uint16
	_name, err := UTF16PtrFromString(name)
	if err != nil {
		return false, nil
	} // Create int32 to hold bool result
	var _value int32

	hr, _, _ := i.Vtbl.Contains.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(_name)),
		uintptr(unsafe.Pointer(&_value)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return false, syscall.Errno(hr)
	}
	// Get result and cleanup
	value := _value != 0
	return value, nil
}

func (i *ICoreWebView2HttpRequestHeaders) SetHeader(name string, value string) error {

	// Convert string 'name' to *uint16
	_name, err := UTF16PtrFromString(name)
	if err != nil {
		return err
	}
	// Convert string 'value' to *uint16
	_value, err := UTF16PtrFromString(value)
	if err != nil {
		return err
	}

	hr, _, _ := i.Vtbl.SetHeader.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(_name)),
		uintptr(unsafe.Pointer(_value)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return syscall.Errno(hr)
	}
	return nil
}

func (i *ICoreWebView2HttpRequestHeaders) RemoveHeader(name string) error {

	// Convert string 'name' to *uint16
	_name, err := UTF16PtrFromString(name)
	if err != nil {
		return err
	}

	hr, _, _ := i.Vtbl.RemoveHeader.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(_name)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return syscall.Errno(hr)
	}
	return nil
}

func (i *ICoreWebView2HttpRequestHeaders) GetIterator() (*ICoreWebView2HttpHeadersCollectionIterator, error) {

	var value *ICoreWebView2HttpHeadersCollectionIterator

	hr, _, _ := i.Vtbl.GetIterator.Call(
		uintptr(unsafe.Pointer(i)),
		uintptr(unsafe.Pointer(&value)),
	)
	if windows.Handle(hr) != windows.S_OK {
		return nil, syscall.Errno(hr)
	}
	return value, nil
}