import type {Codec} from './codec';
import type {LogLevel} from './log-level';
import {Log} from './logger';

export const validateEvenDimensionsWithCodec = ({
	width,
	height,
	codec,
	scale,
	wantsImageSequence,
	indent,
	logLevel,
}: {
	width: number;
	height: number;
	scale: number;
	codec: Codec;
	wantsImageSequence: boolean;
	indent: boolean;
	logLevel: LogLevel;
}) => {
	if (wantsImageSequence) {
		return {
			actualWidth: width,
			actualHeight: height,
		};
	}

	if (
		codec !== 'h264-mkv' &&
		codec !== 'h264' &&
		codec !== 'h265' &&
		codec !== 'av1' &&
		codec !== 'h264-ts'
	) {
		return {
			actualWidth: width,
			actualHeight: height,
		};
	}

	let heightEvenDimensions = height;
	while (Math.round(heightEvenDimensions * scale) % 2 !== 0) {
		heightEvenDimensions--;
	}

	let widthEvenDimensions = width;
	while (Math.round(widthEvenDimensions * scale) % 2 !== 0) {
		widthEvenDimensions--;
	}

	if (widthEvenDimensions !== width) {
		Log.verbose(
			{indent, logLevel},
			`Rounding width to an even number from ${width} to ${widthEvenDimensions}`,
		);
	}

	if (heightEvenDimensions !== height) {
		Log.verbose(
			{indent, logLevel},
			`Rounding height to an even number from ${height} to ${heightEvenDimensions}`,
		);
	}

	return {
		actualWidth: widthEvenDimensions,
		actualHeight: heightEvenDimensions,
	};
};