// Modified version of: https://github.com/home-assistant/frontend/blob/092dfd1e87f882236c250d55868c0066e566e80a/src/panels/lovelace/common/process-config-entities.ts
// Parse array of entity objects from config

import { EntityConfig } from 'custom-card-helpers';

export function processConfigEntities(
	entities: Array<EntityConfig | string> | string | EntityConfig,
): EntityConfig[] {
	if (!Array.isArray(entities)) {
		entities = [entities];
	}
	if (entities.length > 0 && entities.every((e) => e == null)) {
		return [];
	}

	return entities.map((entityConf, index): any => {
		if (typeof entityConf === 'object' && !Array.isArray(entityConf) && entityConf.type) {
			return entityConf;
		}

		let config: EntityConfig;

		if (typeof entityConf === 'string') {
			config = { entity: entityConf } as EntityConfig;
		} else if (typeof entityConf === 'object' && !Array.isArray(entityConf)) {
			if (!('entity' in entityConf)) {
				throw new Error(`Entity object at position ${index} is missing entity field.`);
			}
			config = entityConf as EntityConfig;
		} else {
			throw new Error(`Invalid entity specified at position ${index}.`);
		}
		return config;
	});
}