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#![allow(non_camel_case_types, non_snake_case)]

use crate::decl::*;
use crate::kernel::ffi_types::*;
use crate::ole::privs::*;
use crate::prelude::*;
use crate::vt::*;

/// [`IGraphBuilder`](crate::IGraphBuilder) virtual table.
#[repr(C)]
pub struct IGraphBuilderVT {
	pub IFilterGraphVT: IFilterGraphVT,
	pub Connect: fn(COMPTR, COMPTR, COMPTR) -> HRES,
	pub Render: fn(COMPTR, COMPTR) -> HRES,
	pub RenderFile: fn(COMPTR, PCSTR, PCSTR) -> HRES,
	pub AddSourceFilter: fn(COMPTR, PCSTR, PCSTR, *mut COMPTR) -> HRES,
	pub SetLogFile: fn(COMPTR, HANDLE) -> HRES,
	pub Abort: fn(COMPTR) -> HRES,
	pub ShouldOperationContinue: fn(COMPTR) -> HRES,
}

com_interface! { IGraphBuilder: "56a868a9-0ad4-11ce-b03a-0020af0ba770";
	/// [`IGraphBuilder`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nn-strmif-igraphbuilder)
	/// COM interface over [`IGraphBuilderVT`](crate::vt::IGraphBuilderVT).
	///
	/// Automatically calls
	/// [`IUnknown::Release`](https://learn.microsoft.com/en-us/windows/win32/api/unknwn/nf-unknwn-iunknown-release)
	/// when the object goes out of scope.
	///
	/// # Examples
	///
	/// ```no_run
	/// use winsafe::{self as w, prelude::*, co};
	///
	/// let obj = w::CoCreateInstance::<w::IGraphBuilder>(
	///     &co::CLSID::FilterGraph,
	///     None,
	///     co::CLSCTX::INPROC_SERVER,
	/// )?;
	/// # w::HrResult::Ok(())
	/// ```
}

impl dshow_IFilterGraph for IGraphBuilder {}
impl dshow_IGraphBuilder for IGraphBuilder {}

/// This trait is enabled with the `dshow` feature, and provides methods for
/// [`IGraphBuilder`](crate::IGraphBuilder).
///
/// Prefer importing this trait through the prelude:
///
/// ```no_run
/// use winsafe::prelude::*;
/// ```
pub trait dshow_IGraphBuilder: dshow_IFilterGraph {
	fn_com_noparm! { Abort: IGraphBuilderVT;
		/// [`IGraphBuilder::Abort`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-abort)
		/// method.
	}

	/// [`IGraphBuilder::AddSourceFilter`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-addsourcefilter)
	/// method.
	#[must_use]
	fn AddSourceFilter(&self,
		file_name: &str,
		filter_name: &str,
	) -> HrResult<IBaseFilter>
	{
		let mut queried = unsafe { IBaseFilter::null() };
		ok_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).AddSourceFilter)(
					self.ptr(),
					WString::from_str(file_name).as_ptr(),
					WString::from_str(filter_name).as_ptr(),
					queried.as_mut(),
				)
			},
		).map(|_| queried)
	}

	/// [`IGraphBuilder::Connect`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-connect)
	/// method.
	fn Connect(&self,
		pin_out: &impl dshow_IPin,
		pin_in: &impl dshow_IPin,
	) -> HrResult<()>
	{
		ok_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).Connect)(
					self.ptr(),
					pin_out.ptr(),
					pin_in.ptr(),
				)
			},
		)
	}

	/// [`IGraphBuilder::Render`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-render)
	/// method.
	fn Render(&self, pin_out: &impl dshow_IPin) -> HrResult<()> {
		ok_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).Render)(self.ptr(), pin_out.ptr())
			},
		)
	}

	/// [`IGraphBuilder::RenderFile`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-renderfile)
	/// method.
	fn RenderFile(&self, file: &str) -> HrResult<()> {
		ok_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).RenderFile)(
					self.ptr(),
					WString::from_str(file).as_ptr(),
					std::ptr::null(),
				)
			},
		)
	}

	/// [`IGraphBuilder::SetLogFile`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-setlogfile)
	/// method.
	fn SetLogFile(&self, hfile: Option<&HFILE>) -> HrResult<()> {
		ok_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).SetLogFile)(
					self.ptr(),
					hfile.map_or(std::ptr::null_mut(), |h| h.ptr()),
				)
			},
		)
	}

	/// [`IGraphBuilder::ShouldOperationContinue`](https://learn.microsoft.com/en-us/windows/win32/api/strmif/nf-strmif-igraphbuilder-shouldoperationcontinue)
	/// method.
	#[must_use]
	fn ShouldOperationContinue(&self) -> HrResult<bool> {
		okfalse_to_hrresult(
			unsafe {
				(vt::<IGraphBuilderVT>(self).ShouldOperationContinue)(self.ptr())
			},
		)
	}
}