/**
 * External dependencies
 */
const { getOctokit, context } = require( '@actions/github' );
const { setFailed, getInput, setOutput } = require( '@actions/core' );

const runner = async () => {
	try {
		const token = getInput( 'repo-token', { required: true } );
		const octokit = getOctokit( token );
		const payload = context.payload;
		const repo = payload.repository.name;
		const owner = payload.repository.owner.login;
		const oldAssets = require( '../../' +
			getInput( 'compare', {
				required: true,
			} ) );

		if ( ! oldAssets ) {
			return;
		}

		const newAssets = require( '../../../woocommerce/assets/client/blocks/assets.json' );

		if ( ! newAssets ) {
			return;
		}

		const createComment = getInput( 'create-comment' );

		const changes = Object.fromEntries(
			Object.entries( newAssets )
				.map( ( [ key, { dependencies = [] } ] ) => {
					const oldDependencies =
						oldAssets[ key ]?.dependencies || [];
					const added = dependencies.filter(
						( dependency ) =>
							! oldDependencies.includes( dependency )
					);
					const removed = oldDependencies.filter(
						( dependency ) => ! dependencies.includes( dependency )
					);
					return added.length || removed.length
						? [
								key,
								{
									added,
									removed,
								},
						  ]
						: null;
				} )
				.filter( Boolean )
		);

		let reportCommentId;

		{
			const currentComments = await octokit.rest.issues.listComments( {
				owner,
				repo,
				issue_number: payload.pull_request.number,
			} );

			if (
				Array.isArray( currentComments.data ) &&
				currentComments.data.length > 0
			) {
				const comment = currentComments.data.find(
					( comment ) =>
						comment.body.includes( 'Script Dependencies Report' ) &&
						comment.user.login === 'github-actions[bot]'
				);

				if ( comment ) {
					reportCommentId = comment.id;
				}
			}
		}

		let commentBody = '';

		if ( Object.keys( changes ).length > 0 ) {
			let reportContent = '';

			Object.entries( changes ).forEach(
				( [ handle, { added, removed } ] ) => {
					const addedDeps = added.length
						? '`' + added.join( '`, `' ) + '`'
						: '';
					const removedDeps = removed.length
						? '`' + removed.join( '`, `' ) + '`'
						: '';

					let icon = '';

					if ( added.length && removed.length ) {
						icon = '❓';
					} else if ( added.length ) {
						icon = '⚠️';
					} else if ( removed.length ) {
						icon = '🎉';
					}

					reportContent +=
						`| \`${ handle }\` | ${ addedDeps } | ${ removedDeps } | ${ icon } |` +
						'\n';
				}
			);

			commentBody =
				'## Script Dependencies Report' +
				'\n\n' +
				'The `compare-assets` action has detected some changed script dependencies between this branch and ' +
				'trunk. Please review and confirm the following are correct before merging.' +
				'\n\n' +
				'| Script Handle | Added | Removed |    |' +
				'\n' +
				'| ------------- | ------| ------- | -- |' +
				'\n' +
				reportContent +
				'\n\n' +
				'__This comment was automatically generated by the `./github/compare-assets` action.__';
		} else {
			commentBody =
				'## Script Dependencies Report' +
				'\n\n' +
				'There is no changed script dependency between this branch and trunk.' +
				'\n\n' +
				'__This comment was automatically generated by the `./github/compare-assets` action.__';
		}

		if ( createComment !== 'true' ) {
			setOutput( 'comment', commentBody );
			return;
		}

		if ( reportCommentId ) {
			await octokit.rest.issues.updateComment( {
				owner,
				repo,
				comment_id: reportCommentId,
				body: commentBody,
			} );
		} else {
			await octokit.rest.issues.createComment( {
				owner,
				repo,
				issue_number: payload.pull_request.number,
				body: commentBody,
			} );
		}
	} catch ( error ) {
		setFailed( error.message );
	}
};

runner();