/**
 * Block registration entry point.
 *
 * @package SoloFiltersImageEnhancements
 */

import { registerBlockType } from '@wordpress/blocks';
import { addFilter } from '@wordpress/hooks';

import './styles/style.scss';
import './styles/editor.scss';

import metadata from './block.json';
import edit from './edit';
import save from './save';
import { PRESETS, DEFAULT_PRESET, isValidPresetSlug } from './presets';
import { transforms } from './transforms';

registerBlockType( metadata.name, {
    ...metadata,
    edit,
    save,
    transforms,
} );

/**
 * Normalise the filter attribute on save. If the saved slug is unknown
 * (e.g. the post was edited by hand), fall back to DEFAULT_PRESET so the
 * block still renders without errors.
 */
function ensureValidFilter( settings, name ) {
    if ( name !== 'ksolo/image-filter' ) {
        return settings;
    }
    const originalSave = settings.save;
    settings.save = ( props ) => {
        if ( ! isValidPresetSlug( props.attributes.filter ) ) {
            props.attributes.filter = DEFAULT_PRESET;
        }
        return originalSave( props );
    };
    return settings;
}
addFilter(
    'blocks.registerBlockType',
    'solofilters-image-enhancements/ensure-valid-filter',
    ensureValidFilter
);

// Re-export PRESETS so the consuming downstream code (e.g. a future
// design-tool integration) can grab them from this module.
export { PRESETS };