const largeIcon = (link, _isNightTime) => {
	if (!link) return false;

	// internal function to add path to returned icon
	const addPath = (icon) => `images/${icon}`;
	// extract day or night if not provided
	const isNightTime = _isNightTime ?? link.indexOf('/night/') >= 0;

	// grab everything after the last slash ending at any of these: ?&,
	const afterLastSlash = link.toLowerCase().match(/[^/]+$/)[0];
	let conditionName = afterLastSlash.match(/(.*?)[&,.?]/)[1];
	// using probability as a crude heavy/light indication where possible
	const value = +(link.match(/,(\d{2,3})/) ?? [0, 100])[1];

	// if a 'DualImage' is captured, adjust to just the j parameter
	if (conditionName === 'dualimage') {
		const match = link.match(/&j=(.*)&/);
		[, conditionName] = match;
	}

	// find the icon
	switch (conditionName + (isNightTime ? '-n' : '')) {
		case 'skc':
		case 'hot':
		case 'haze':
		case 'cold':
			return addPath('CC_Clear1.gif');

		case 'skc-n':
		case 'nskc':
		case 'nskc-n':
		case 'cold-n':
			return addPath('CC_Clear0.gif');

		case 'sct':
		case 'few':
		case 'bkn':
			return addPath('CC_PartlyCloudy1.gif');

		case 'bkn-n':
		case 'few-n':
		case 'nfew-n':
		case 'nfew':
		case 'sct-n':
		case 'nsct':
		case 'nsct-n':
			return addPath('CC_PartlyCloudy0.gif');

		case 'ovc':
		case 'novc':
		case 'ovc-n':
			return addPath('CC_Cloudy.gif');

		case 'fog':
		case 'fog-n':
			return addPath('CC_Fog.gif');

		case 'rain_sleet':
		case 'rain_sleet-n':
		case 'sleet':
		case 'sleet-n':
			return addPath('Sleet.gif');

		case 'rain_showers':
		case 'rain_showers_high':
			return addPath('CC_Showers.gif');

		case 'rain_showers-n':
		case 'rain_showers_high-n':
			return addPath('CC_Showers.gif');

		case 'rain':
		case 'rain-n':
			return addPath('CC_Rain.gif');

		// case 'snow':
		// 	return addPath('Light-Snow.gif');
		// 	break;
		// case 'cc_snowshowers.gif':
		// 	//case "heavy-snow.gif":
		// 	return addPath('AM-Snow-1994.gif');
		// 	break;
		case 'snow':
		case 'snow-n':
			if (value > 50) return addPath('CC_Snow.gif');
			return addPath('CC_SnowShowers.gif');

		case 'rain_snow':
			return addPath('CC_RainSnow.gif');

		case 'snow_fzra':
		case 'snow_fzra-n':
		case 'fzra':
		case 'fzra-n':
		case 'rain_fzra':
		case 'rain_fzra-n':
			return addPath('CC_FreezingRain.gif');

		case 'snow_sleet':
			return addPath('Snow-Sleet.gif');

		case 'tsra_sct':
		case 'tsra':
			return addPath('EF_ScatTstorms.gif');

		case 'tsra_sct-n':
		case 'tsra-n':
			return addPath('CC_TStorm.gif');

		case 'tsra_hi':
		case 'tsra_hi-n':
		case 'hurricane':
		case 'tropical_storm':
		case 'hurricane-n':
		case 'tropical_storm-n':
			return addPath('CC_TStorm.gif');

		case 'wind_few':
		case 'wind_sct':
		case 'wind_bkn':
		case 'wind_ovc':
		case 'wind_skc':
		case 'wind_few-n':
		case 'wind_bkn-n':
		case 'wind_ovc-n':
		case 'wind_skc-n':
		case 'wind_sct-n':
			return addPath('CC_Windy.gif');

		case 'blizzard':
		case 'blizzard-n':
			return addPath('Blowing-Snow.gif');

		default:
			console.log(`Unable to locate icon for ${conditionName} ${link} ${isNightTime}`);
			return false;
	}
};

export default largeIcon;