#include <assert.h>
#include <stdlib.h>
#include <stdbool.h>
#include <wayland-server.h>
#include <wlr/types/wlr_box.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/types/wlr_wl_shell.h>
#include <wlr/util/log.h>
#include "rootston/desktop.h"
#include "rootston/server.h"
#include "rootston/input.h"

static void handle_move(struct wl_listener *listener, void *data) {
	struct roots_wl_shell_surface *roots_surface =
		wl_container_of(listener, roots_surface, request_move);
	struct roots_view *view = roots_surface->view;
	struct roots_input *input = view->desktop->server->input;
	struct wlr_wl_shell_surface_move_event *e = data;

	// TODO: Some of this might want to live in cursor.c I guess
	struct roots_input_event *event = NULL;
	size_t len = sizeof(input->input_events) / sizeof(*input->input_events);
	for (size_t i = 0; i < len; ++i) {
		if (input->input_events[i].cursor
				&& input->input_events[i].serial == e->serial) {
			event = &input->input_events[i];
			break;
		}
	}
	if (!event || input->mode != ROOTS_CURSOR_PASSTHROUGH) {
		return;
	}
	input->mode = ROOTS_CURSOR_MOVE;
	input->offs_x = input->cursor->x - view->x;
	input->offs_y = input->cursor->y - view->y;
	wlr_seat_pointer_clear_focus(input->wl_seat);
}

static void handle_destroy(struct wl_listener *listener, void *data) {
	struct roots_wl_shell_surface *roots_surface =
		wl_container_of(listener, roots_surface, destroy);
	wl_list_remove(&roots_surface->destroy.link);
	wl_list_remove(&roots_surface->ping_timeout.link);
	wl_list_remove(&roots_surface->request_move.link);
	wl_list_remove(&roots_surface->request_resize.link);
	wl_list_remove(&roots_surface->request_set_fullscreen.link);
	wl_list_remove(&roots_surface->request_set_maximized.link);
	view_destroy(roots_surface->view);
	free(roots_surface);
}

void handle_wl_shell_surface(struct wl_listener *listener, void *data) {
	struct roots_desktop *desktop =
		wl_container_of(listener, desktop, wl_shell_surface);

	struct wlr_wl_shell_surface *surface = data;
	wlr_log(L_DEBUG, "new shell surface: title=%s, class=%s",
		surface->title, surface->class);
	//wlr_wl_shell_surface_ping(surface); // TODO: segfaults

	struct roots_wl_shell_surface *roots_surface =
		calloc(1, sizeof(struct roots_wl_shell_surface));
	// TODO: all of the trimmings
	wl_list_init(&roots_surface->destroy.link);
	roots_surface->destroy.notify = handle_destroy;
	wl_signal_add(&surface->events.destroy, &roots_surface->destroy);
	wl_list_init(&roots_surface->ping_timeout.link);
	wl_list_init(&roots_surface->request_move.link);
	roots_surface->request_move.notify = handle_move;
	wl_signal_add(&surface->events.request_move, &roots_surface->request_move);
	wl_list_init(&roots_surface->request_resize.link);
	wl_list_init(&roots_surface->request_set_fullscreen.link);
	wl_list_init(&roots_surface->request_set_maximized.link);

	struct roots_view *view = calloc(1, sizeof(struct roots_view));
	view->type = ROOTS_WL_SHELL_VIEW;
	view->x = view->y = 200;
	view->wl_shell_surface = surface;
	view->roots_wl_shell_surface = roots_surface;
	view->wlr_surface = surface->surface;
	view->desktop = desktop;
	roots_surface->view = view;
	wl_list_insert(&desktop->views, &view->link);
}