/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * Wayland Input
 *
 * Copyright 2014 Manuel Bachmann <tarnyko@tarnyko.net>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdlib.h>
#include <linux/input.h>

#include <freerdp/locale/keyboard.h>

#include "wlf_input.h"

static void wl_pointer_enter(void* data, struct wl_pointer* pointer, uint32_t serial, struct wl_surface* surface, wl_fixed_t sx_w, wl_fixed_t sy_w)
{

}

static void wl_pointer_leave(void* data, struct wl_pointer* pointer, uint32_t serial, struct wl_surface* surface)
{
	
}

static void wl_pointer_motion(void* data, struct wl_pointer* pointer, uint32_t time, wl_fixed_t sx_w, wl_fixed_t sy_w)
{
	wlfInput* input_w = data;
	rdpInput* input;
	UINT16 x;
	UINT16 y;

	input = input_w->input;

	x = (UINT16) wl_fixed_to_int(sx_w);
	y = (UINT16) wl_fixed_to_int(sy_w);

	input->MouseEvent(input, PTR_FLAGS_MOVE, x, y);

	input_w->last_x = x;
	input_w->last_y = y;
}

static void wl_pointer_button(void* data, struct wl_pointer* pointer, uint32_t serial, uint32_t time, uint32_t button, uint32_t state)
{
	wlfInput* input_w = data;
	rdpInput* input;
	UINT16 x;
	UINT16 y;
	UINT16 flags;

	input = input_w->input;

	if (state == WL_POINTER_BUTTON_STATE_PRESSED)
		flags = PTR_FLAGS_DOWN;
	else
		flags = 0;

	switch (button)
	{
		case BTN_LEFT:
			flags |= PTR_FLAGS_BUTTON1;
			break;
		case BTN_RIGHT:
			flags |= PTR_FLAGS_BUTTON2;
			break;
		case BTN_MIDDLE:
			flags |= PTR_FLAGS_BUTTON3;
			break;
		default:
			return;
	}

	x = input_w->last_x;
	y = input_w->last_y;

	input->MouseEvent(input, flags, x, y);
}

static void wl_pointer_axis(void* data, struct wl_pointer* pointer, uint32_t time, uint32_t axis, wl_fixed_t value)
{
	wlfInput* input_w = data;
	rdpInput* input;
	UINT16 flags;
	int direction;

	input = input_w->input;

	flags = PTR_FLAGS_WHEEL;

	if (axis == WL_POINTER_AXIS_VERTICAL_SCROLL)
	{
		direction = wl_fixed_to_int(value);
		if (direction < 0)
			flags |= 0x0078;
		else
			flags |= PTR_FLAGS_WHEEL_NEGATIVE | 0x0088;
	}

	input->MouseEvent(input, flags, 0, 0);
}

static const struct wl_pointer_listener wl_pointer_listener =
{
	wl_pointer_enter,
	wl_pointer_leave,
	wl_pointer_motion,
	wl_pointer_button,
	wl_pointer_axis
};

static void wl_keyboard_keymap(void* data, struct wl_keyboard* keyboard, uint32_t format, int fd, uint32_t size)
{

}

static void wl_keyboard_enter(void* data, struct wl_keyboard* keyboard, uint32_t serial, struct wl_surface* surface, struct wl_array* keys)
{
	wlfInput* input_w = data;
	rdpInput* input;
	UINT16 x;
	UINT16 y;

	input = input_w->input;

	x = input_w->last_x;
	y = input_w->last_y;

	input->FocusInEvent(input, 0, x, y);
}

static void wl_keyboard_leave(void* data, struct wl_keyboard* keyboard, uint32_t serial, struct wl_surface* surface)
{

}

static void wl_keyboard_key(void* data, struct wl_keyboard* keyboard, uint32_t serial, uint32_t time, uint32_t key, uint32_t state)
{
	wlfInput* input_w = data;
	rdpInput* input;
	BOOL key_down;
	DWORD rdp_scancode;

	input = input_w->input;

	if (state == WL_KEYBOARD_KEY_STATE_PRESSED)
		key_down = TRUE;
	else
		key_down = FALSE;

	rdp_scancode = (DWORD) key;

	if (rdp_scancode == RDP_SCANCODE_UNKNOWN)
		return;

	freerdp_input_send_keyboard_event_ex(input, key_down, rdp_scancode);
}

static void wl_keyboard_modifiers(void* data, struct wl_keyboard* keyboard, uint32_t serial, uint32_t mods_depr, uint32_t mods_latch, uint32_t mods_lock, uint32_t group)
{

}

static const struct wl_keyboard_listener wl_keyboard_listener =
{
	wl_keyboard_keymap,
	wl_keyboard_enter,
	wl_keyboard_leave,
	wl_keyboard_key,
	wl_keyboard_modifiers
};

static void wl_seat_handle_capabilities(void* data, struct wl_seat* seat, enum wl_seat_capability capabilities)
{
	wlfInput* input = data;
	struct wl_pointer* pointer;
	struct wl_keyboard* keyboard;

	if (capabilities & WL_SEAT_CAPABILITY_POINTER)
	{
		pointer = wl_seat_get_pointer(seat);

		input->pointer = pointer;
		wl_pointer_add_listener(pointer, &wl_pointer_listener, input);
	}

	if (capabilities & WL_SEAT_CAPABILITY_KEYBOARD)
	{
		keyboard = wl_seat_get_keyboard(seat);

		input->keyboard = keyboard;
		wl_keyboard_add_listener(keyboard, &wl_keyboard_listener, input);
	}

}

static const struct wl_seat_listener wl_seat_listener = {
	wl_seat_handle_capabilities
};


wlfInput* wlf_CreateInput(wlfContext* wlfc)
{
	wlfInput* input;
	struct wl_seat* seat;

	if (!wlfc->display)
		return NULL;
	if (!wlfc->display->seat)
		return NULL;
	seat = wlfc->display->seat;

	input = (wlfInput*) calloc(1, sizeof(wlfInput));

	if (input)
	{
		input->input = wlfc->context.input;
		input->last_x = 0;
		input->last_y = 0;

		wl_seat_add_listener(seat, &wl_seat_listener, input);
	}

	return input;
}

void wlf_DestroyInput(wlfContext* wlfc, wlfInput* input)
{
	if (input == NULL)
		return;

	if (wlfc->input == input)
		wlfc->input = NULL;

	if (input->pointer)
		wl_pointer_release(input->pointer);
	if (input->keyboard)
		wl_keyboard_release(input->keyboard);

	free(input);
}