#include "screencast_common.h"
#include <assert.h>

void randname(char *buf) {
	struct timespec ts;
	clock_gettime(CLOCK_REALTIME, &ts);
	long r = ts.tv_nsec;
	for (int i = 0; i < 6; ++i) {
		assert(buf[i] == 'X');
		buf[i] = 'A'+(r&15)+(r&16)*2;
		r >>= 5;
	}
}

enum spa_video_format xdpw_format_pw_from_wl_shm(
		struct xdpw_screencast_instance *cast) {
	switch (cast->simple_frame.format) {
	case WL_SHM_FORMAT_ARGB8888:
		return SPA_VIDEO_FORMAT_BGRA;
	case WL_SHM_FORMAT_XRGB8888:
		return SPA_VIDEO_FORMAT_BGRx;
	case WL_SHM_FORMAT_RGBA8888:
		return SPA_VIDEO_FORMAT_ABGR;
	case WL_SHM_FORMAT_RGBX8888:
		return SPA_VIDEO_FORMAT_xBGR;
	case WL_SHM_FORMAT_ABGR8888:
		return SPA_VIDEO_FORMAT_RGBA;
	case WL_SHM_FORMAT_XBGR8888:
		return SPA_VIDEO_FORMAT_RGBx;
	case WL_SHM_FORMAT_BGRA8888:
		return SPA_VIDEO_FORMAT_ARGB;
	case WL_SHM_FORMAT_BGRX8888:
		return SPA_VIDEO_FORMAT_xRGB;
	case WL_SHM_FORMAT_NV12:
		return SPA_VIDEO_FORMAT_NV12;
	default:
		abort();
	}
}

enum spa_video_format xdpw_format_pw_strip_alpha(enum spa_video_format format) {
	switch (format) {
	case SPA_VIDEO_FORMAT_BGRA:
		return SPA_VIDEO_FORMAT_BGRx;
	case SPA_VIDEO_FORMAT_ABGR:
		return SPA_VIDEO_FORMAT_xBGR;
	case SPA_VIDEO_FORMAT_RGBA:
		return SPA_VIDEO_FORMAT_RGBx;
	case SPA_VIDEO_FORMAT_ARGB:
		return SPA_VIDEO_FORMAT_xRGB;
	default:
		return SPA_VIDEO_FORMAT_UNKNOWN;
	}
}

enum xdpw_chooser_types get_chooser_type(const char *chooser_type) {
	if (!chooser_type || strcmp(chooser_type, "default") == 0) {
		return XDPW_CHOOSER_DEFAULT;
	} else if (strcmp(chooser_type, "none") == 0) {
		return XDPW_CHOOSER_NONE;
	} else if (strcmp(chooser_type, "simple") == 0) {
		return XDPW_CHOOSER_SIMPLE;
	} else if (strcmp(chooser_type, "dmenu") == 0) {
		return XDPW_CHOOSER_DMENU;
	}
	fprintf(stderr, "Could not understand chooser type %s\n", chooser_type);
	exit(1);
}

const char *chooser_type_str(enum xdpw_chooser_types chooser_type) {
	switch (chooser_type) {
	case XDPW_CHOOSER_DEFAULT:
		return "default";
	case XDPW_CHOOSER_NONE:
		return "none";
	case XDPW_CHOOSER_SIMPLE:
		return "simple";
	case XDPW_CHOOSER_DMENU:
		return "dmenu";
	}
	fprintf(stderr, "Could not find chooser type %d\n", chooser_type);
	abort();
}