/*********************************************************/

/*  ptycon: a pty-console bridge                         */

/*  Copyright (C) 2016  Z. Gilboa                        */

/*  Released under GPLv2 and GPLv3; see COPYING.PTYCON.  */

/*********************************************************/

#include <psxtypes/psxtypes.h>

#include <ntcon/ntcon.h>

#include <ntapi/ntapi.h>

#include <gdi/gdi.h>

#include <ptycon/ptycon.h>

#include "ptycon_driver_impl.h"

#include "ptycon_status_impl.h"

int __stdcall ptyc_console_ctrl(uint32_t);

int __stdcall ptyc_console_reader(void *);

int __stdcall ptyc_console_writer(void *);;

int __stdcall ptyc_console_poller(void *);

int __stdcall ptyc_dbg_cat(struct ptyc_driver_ctx *);

int __stdcall ptyc_dbg_event(void *);

int __stdcall ptyc_dbg_oven(void *);

int __stdcall ptyc_dbg_raw(void *);

struct ptyc_loop_thread_ctx {

	nt_thread_start_routine *	entry;

	struct ptyc_driver_ctx_impl * 	ictx;

};

static int ptyc_loop_thread_entry(void * ctx)

{

	struct ptyc_loop_thread_ctx *	xctx;

	xctx = (struct ptyc_loop_thread_ctx *)ctx;

	return ntapi->zw_terminate_thread(

		NT_CURRENT_THREAD_HANDLE,

		xctx->entry(xctx->ictx));

}

static int ptyc_create_loop_thread(

	nt_thread_params *		params,

	struct ptyc_driver_ctx_impl * 	ictx,

	nt_thread_start_routine *	entry)

{

	struct ptyc_loop_thread_ctx	xctx;

	xctx.entry = entry;

	xctx.ictx  = ictx;

	/* rapunzel rapunzel */

	params->hprocess	   = NT_CURRENT_PROCESS_HANDLE;

	params->start		   = ptyc_loop_thread_entry;

	params->ext_ctx		   = &xct;;

	params->ext_ctx_size	   = sizeof(xctx);

	params->stack_size_commit  = 64 * 1024;

	params->stack_size_reserve = 64 * 1024;

	params->creation_flags	   = NT_CREATE_LOCAL_THREAD;

	return ntapi->tt_create_thread(

		params);

}

static int ptyc_free_console_impl(

	struct ptyc_driver_ctx_impl *	ictx,

	int32_t				status)

{

	struct ptyc_term_ctx *		tctx;

	struct ptyc_loop_ctx *		lctx;

	tctx = &ictx->tctx;

	lctx = &ictx->lctx;

	if (tctx->hin)

		ntcon->free_console();

	if (lctx->treader.hthread)

		ntapi->zw_close(lctx->treader.hthread);

	if (lctx->twriter.hthread)

		ntapi->zw_close(lctx->twriter.hthread);

	if (lctx->tpoller.hthread)

		ntapi->zw_close(lctx->tpoller.hthread);

	if (lctx->tdbgevent.hthread)

		ntapi->zw_close(lctx->tdbgevent.hthread);

	if (lctx->tdbgoven.hthread)

		ntapi->zw_close(lctx->tdbgoven.hthread);

	if (lctx->tdbgraw.hthread)

		ntapi->zw_close(lctx->tdbgraw.hthread);

	return status;

}

static int ptyc_init_console(struct ptyc_term_ctx * tctx)

{

	/* console input buffer) */

	if (!(tctx->hin = ntcon->get_std_handle(NT_STD_INPUT_HANDLE)))

		return NT_STATUS_UNSUCCESSFUL;

	/* console screen buffer */

	if (!(tctx->hout = ntcon->create_console_screen_buffer(

			NT_GENERIC_READ | NT_GENERIC_WRITE,

			0,0,NT_CONSOLE_TEXTMODE_BUFFER,0)))

		return NT_STATUS_UNSUCCESSFUL;

	if (!(ntcon->set_console_screen_buffer_size(

			tctx->hout,

			tctx->screen_size)))

		return NT_STATUS_UNSUCCESSFUL;

	if (!(ntcon->set_console_active_screen_buffer(tctx->hout)))

		return NT_STATUS_UNSUCCESSFUL;

	/* console text attributes: default colors */

	if (!(ntcon->set_console_text_attribute(

			tctx->hout,

			NT_BACKGROUND_BLACK | NT_FOREGROUND_WHITE)))

		return NT_STATUS_UNSUCCESSFUL;

	/* console code page: utf-8 */

	if (!(ntcon->set_console_code_page(65001)))

		return NT_STATUS_NOT_SUPPORTED;

	if (!(ntcon->set_console_output_code_page(65001)))

		return NT_STATUS_NOT_SUPPORTED;

	/* input events */

	if (!(ntcon->set_console_mode(

			tctx->hin,

			NT_ENABLE_MOUSE_INPUT

			| NT_ENABLE_WINDOW_INPUT)))

		return NT_STATUS_UNSUCCESSFUL;

	/* ctrl events */

	if (!(ntcon->set_console_ctrl_handler(

			ptyc_console_ctrl,

			true)))

		return NT_STATUS_UNSUCCESSFUL;

	return NT_STATUS_SUCCESS;

}

int  ptyc_alloc_console(struct ptyc_driver_ctx * dctx)

{

	int32_t				status;

	struct ptyc_driver_ctx_impl *	ictx;

	struct ptyc_term_ctx *		tctx;

	struct ptyc_loop_ctx *		lctx;

	if (!(ictx = ptyc_get_driver_ictx(dctx)))

		return NT_STATUS_INVALID_HANDLE;

	tctx = &ictx->tctx;

	lctx = &ictx->lctx;

	tctx->screen_size.x = 512;

	tctx->screen_size.y = 4096;

	if (!(ntcon->alloc_console()))

		return NT_STATUS_UNSUCCESSFUL;

	if ((status = ptyc_init_console(tctx)))

		return ptyc_set_status(dctx,status);

	if ((status = ptyc_create_loop_thread(

			&lctx->treader,

			ictx,ptyc_console_reader)))

		return ptyc_set_status(dctx,status);

	if ((status = ptyc_create_loop_thread(

			&lctx->twriter,

			ictx,ptyc_console_writer)))

		return ptyc_set_status(dctx,status);

	if ((status = ptyc_create_loop_thread(

			&lctx->tpoller,

			ictx,ptyc_console_poller)))

		return ptyc_set_status(dctx,status);

	if (dctx->cctx->drvflags & PTYC_DRIVER_DBG_EVENT)

		if ((status = ptyc_create_loop_thread(

				&lctx->tdbgevent,

				ictx,ptyc_dbg_event)))

			return ptyc_set_status(dctx,status);

	if (dctx->cctx->drvflags & PTYC_DRIVER_DBG_OVEN)

		if ((status = ptyc_create_loop_thread(

				&lctx->tdbgoven,

				ictx,ptyc_dbg_oven)))

			return ptyc_set_status(dctx,status);

	if (dctx->cctx->drvflags & PTYC_DRIVER_DBG_RAW)

		if ((status = ptyc_create_loop_thread(

				&lctx->tdbgraw,

				ictx,ptyc_dbg_raw)))

			return ptyc_set_status(dctx,status);

	if ((status = ptyc_dbg_cat(dctx)))

		return ptyc_set_status(dctx,status);

	return ptyc_set_status(dctx,NT_STATUS_SUCCESS);

}

int  ptyc_wait_for_console(struct ptyc_driver_ctx * dctx)

{

	struct ptyc_driver_ctx_impl * ictx;

	if (!(ictx = ptyc_get_driver_ictx(dctx)))

		return NT_STATUS_INVALID_HANDLE;

	return ntapi->zw_wait_for_single_object(

		ictx->lctx.tpoller.hthread,

		NT_SYNC_ALERTABLE,0);

}

void ptyc_free_console(struct ptyc_driver_ctx * dctx)

{

	struct ptyc_driver_ctx_impl * ictx;

	if (!(ictx = ptyc_get_driver_ictx(dctx)))

		return;

	ptyc_free_console_impl(ictx,NT_STATUS_SUCCESS);

}