/*
 * Copyright © 2012 Intel Corporation
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of the copyright holders not be used in
 * advertising or publicity pertaining to distribution of the software
 * without specific, written prior permission.  The copyright holders make
 * no representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <signal.h>
#include <unistd.h>
#include "../src/compositor.h"
#include "wayland-test-server-protocol.h"

struct weston_test {
	struct weston_compositor *compositor;
	struct weston_layer layer;
	struct weston_process process;
};

struct weston_test_surface {
	struct weston_surface *surface;
	int32_t x, y;
	struct weston_test *test;
};

static void
test_client_sigchld(struct weston_process *process, int status)
{
	struct weston_test *test =
		container_of(process, struct weston_test, process);

	assert(status == 0);

	wl_display_terminate(test->compositor->wl_display);
}

static struct weston_seat *
get_seat(struct weston_test *test)
{
	struct wl_list *seat_list;
	struct weston_seat *seat;

	seat_list = &test->compositor->seat_list;
	assert(wl_list_length(seat_list) == 1);
	seat = container_of(seat_list->next, struct weston_seat, link);

	return seat;
}

static void
notify_pointer_position(struct weston_test *test, struct wl_resource *resource)
{
	struct weston_seat *seat = get_seat(test);
	struct weston_pointer *pointer = seat->pointer;

	wl_test_send_pointer_position(resource, pointer->x, pointer->y);
}

static void
test_surface_configure(struct weston_surface *surface, int32_t sx, int32_t sy, int32_t width, int32_t height)
{
	struct weston_test_surface *test_surface = surface->configure_private;
	struct weston_test *test = test_surface->test;

	if (wl_list_empty(&surface->layer_link))
		wl_list_insert(&test->layer.surface_list,
			       &surface->layer_link);

	weston_surface_configure(surface, test_surface->x, test_surface->y,
				 width, height);

	if (!weston_surface_is_mapped(surface))
		weston_surface_update_transform(surface);
}

static void
move_surface(struct wl_client *client, struct wl_resource *resource,
	     struct wl_resource *surface_resource,
	     int32_t x, int32_t y)
{
	struct weston_surface *surface = surface_resource->data;
	struct weston_test_surface *test_surface;

	surface->configure = test_surface_configure;
	if (surface->configure_private == NULL)
		surface->configure_private = malloc(sizeof *test_surface);
	test_surface = surface->configure_private;
	if (test_surface == NULL) {
		wl_resource_post_no_memory(resource);
		return;
	}

	test_surface->surface = surface;
	test_surface->test = resource->data;
	test_surface->x = x;
	test_surface->y = y;
}

static void
move_pointer(struct wl_client *client, struct wl_resource *resource,
	     int32_t x, int32_t y)
{
	struct weston_test *test = resource->data;
	struct weston_seat *seat = get_seat(test);
	struct weston_pointer *pointer = seat->pointer;

	test->compositor->focus = 1;

	notify_motion(seat, 100,
		      wl_fixed_from_int(x) - pointer->x,
		      wl_fixed_from_int(y) - pointer->y);

	notify_pointer_position(test, resource);
}

static void
send_button(struct wl_client *client, struct wl_resource *resource,
	    int32_t button, uint32_t state)
{
	struct weston_test *test = resource->data;
	struct weston_seat *seat = get_seat(test);

	test->compositor->focus = 1;

	notify_button(seat, 100, button, state);
}

static void
activate_surface(struct wl_client *client, struct wl_resource *resource,
		 struct wl_resource *surface_resource)
{
	struct weston_surface *surface = surface_resource ?
					surface_resource->data : NULL;
	struct weston_test *test = resource->data;
	struct weston_seat *seat;

	seat = get_seat(test);

	if (surface) {
		weston_surface_activate(surface, seat);
		notify_keyboard_focus_in(seat, &seat->keyboard->keys,
					 STATE_UPDATE_AUTOMATIC);
	}
	else {
		notify_keyboard_focus_out(seat);
		weston_surface_activate(surface, seat);
	}
}

static void
send_key(struct wl_client *client, struct wl_resource *resource,
	 uint32_t key, enum wl_keyboard_key_state state)
{
	struct weston_test *test = resource->data;
	struct weston_seat *seat = get_seat(test);

	test->compositor->focus = 1;

	notify_key(seat, 100, key, state, STATE_UPDATE_AUTOMATIC);
}

static const struct wl_test_interface test_implementation = {
	move_surface,
	move_pointer,
	send_button,
	activate_surface,
	send_key
};

static void
bind_test(struct wl_client *client, void *data, uint32_t version, uint32_t id)
{
	struct weston_test *test = data;
	struct wl_resource *resource;

	resource = wl_client_add_object(client, &wl_test_interface,
					&test_implementation, id, test);

	notify_pointer_position(test, resource);
}

static void
idle_launch_client(void *data)
{
	struct weston_test *test = data;
	pid_t pid;
	sigset_t allsigs;
	char *path;

	path = getenv("WESTON_TEST_CLIENT_PATH");
	if (path == NULL)
		exit(EXIT_FAILURE);
	pid = fork();
	if (pid == -1)
		exit(EXIT_FAILURE);
	if (pid == 0) {
		sigfillset(&allsigs);
		sigprocmask(SIG_UNBLOCK, &allsigs, NULL);
		execl(path, path, NULL);
		weston_log("compositor: executing '%s' failed: %m\n", path);
		exit(EXIT_FAILURE);
	}

	test->process.pid = pid;
	test->process.cleanup = test_client_sigchld;
	weston_watch_process(&test->process);
}

WL_EXPORT int
module_init(struct weston_compositor *ec,
	    int *argc, char *argv[])
{
	struct weston_test *test;
	struct wl_event_loop *loop;

	test = malloc(sizeof *test);
	if (test == NULL)
		return -1;

	memset(test, 0, sizeof *test);
	test->compositor = ec;
	weston_layer_init(&test->layer, &ec->cursor_layer.link);

	if (wl_display_add_global(ec->wl_display, &wl_test_interface,
				  test, bind_test) == NULL)
		return -1;

	loop = wl_display_get_event_loop(ec->wl_display);
	wl_event_loop_add_idle(loop, idle_launch_client, test);

	return 0;
}