---
import { getImage, imageConfig, type LocalImageProps, type RemoteImageProps } from 'astro:assets';
import type { UnresolvedImageTransform } from '../dist/assets/types.js';
import { AstroError, AstroErrorData } from '../dist/core/errors/index.js';
import type { HTMLAttributes } from '../types.js';

// The TypeScript diagnostic for JSX props uses the last member of the union to suggest props, so it would be better for
// LocalImageProps to be last. Unfortunately, when we do this the error messages that remote images get are complete nonsense
// Not 100% sure how to fix this, seems to be a TypeScript issue. Unfortunate.
type Props = LocalImageProps | RemoteImageProps;

const props = Astro.props;

if (props.alt === undefined || props.alt === null) {
	throw new AstroError(AstroErrorData.ImageMissingAlt);
}

// As a convenience, allow width and height to be string with a number in them, to match HTML's native `img`.
if (typeof props.width === 'string') {
	props.width = Number.parseInt(props.width);
}

if (typeof props.height === 'string') {
	props.height = Number.parseInt(props.height);
}

const layout = props.layout ?? imageConfig.layout ?? 'none';

if (layout !== 'none') {
	props.layout ??= imageConfig.layout;
	props.fit ??= imageConfig.objectFit ?? 'cover';
	props.position ??= imageConfig.objectPosition ?? 'center';
} else if (imageConfig.objectFit || imageConfig.objectPosition) {
	props.fit ??= imageConfig.objectFit;
	props.position ??= imageConfig.objectPosition;
}

const image = await getImage(props as UnresolvedImageTransform);

const additionalAttributes: HTMLAttributes<'img'> = {};
if (image.srcSet.values.length > 0) {
	additionalAttributes.srcset = image.srcSet.attribute;
}

if (import.meta.env.DEV) {
	additionalAttributes['data-image-component'] = 'true';
}

const { class: className, ...attributes } = { ...additionalAttributes, ...image.attributes };
---

{/* Applying class outside of the spread prevents it from applying unnecessary astro-* classes */}
<img src={image.src} {...attributes} class={className} />
