#define _XOPEN_SOURCE 500
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <stdint.h>
#include <wayland-client.h>
#include <wlr/types.h>
#include "types.h"
#include "backend/wayland.h"
#include "common/log.h"

static void wl_output_handle_mode(void *data, struct wl_output *wl_output,
		     uint32_t flags, int32_t width, int32_t height, int32_t refresh) {
	struct wlr_output *output = data;
	assert(output->state->output == wl_output);
	struct wlr_output_mode *mode;
	if (!(mode = calloc(sizeof(struct wlr_output_mode), 1))) {
		wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
		return;
	}

	mode->flags = flags;
	mode->width = width;
	mode->height = height;
	mode->refresh = refresh;
	list_add(output->modes, mode);

	wlr_log(L_DEBUG, "Got mode for output %p: %dx%d @ %.2fHz%s%s",
			wl_output, width, height, refresh / 1000.0,
			(flags & WL_OUTPUT_MODE_PREFERRED) ? " (preferred)" : "",
			(flags & WL_OUTPUT_MODE_CURRENT) ? " (current)" : "");
}

static void wl_output_handle_geometry(void *data, struct wl_output *wl_output,
			 int32_t x, int32_t y, int32_t physical_width, int32_t physical_height,
			 int32_t subpixel, const char *make, const char *model, int32_t transform) {
	struct wlr_output *output = data;
	assert(output->state->output == wl_output);

	// TODO
	// output->x = x;
	// output->y = y;

	output->phys_width = physical_width;
	output->phys_height = physical_height;
	output->subpixel = subpixel;
	strncpy(output->make, make, sizeof(output->make));
	strncpy(output->model, model, sizeof(output->model));
	output->transform = transform;
	wlr_log(L_DEBUG, "Got info for output %p %dx%d (%dmm x %dmm) %s %s",
			wl_output, (int)x, (int)y, (int)physical_width, (int)physical_height,
			make, model);
}

static void wl_output_handle_scale(void *data, struct wl_output *wl_output, int32_t factor) {
	struct wlr_output *output = data;
	assert(output->state->output == wl_output);
	output->scale = factor;
	wlr_log(L_DEBUG, "Got scale factor for output %p: %d", wl_output, factor);
}

static void wl_output_handle_done(void *data, struct wl_output *wl_output) {
	// TODO: notify of changes? Probably not necessary for this backend
}

const struct wl_output_listener output_listener = {
	.mode = wl_output_handle_mode,
	.geometry = wl_output_handle_geometry,
	.scale = wl_output_handle_scale,
	.done = wl_output_handle_done
};