import { glob } from 'glob';
import { read_text } from '../fs';
import { BuildState } from './state';
import { build_partials, file_hash_matches, map_input_file_to_output_file, map_output_file_to_url, render_page, skip_file, update_metadata } from './helpers';

export async function render_markdown_files(state: BuildState) {
	const promises: Promise<any>[] = [ ];
	const files = await glob(state.conf.input.markdown, {
		absolute: true,
		cwd: state.conf.input.root,
	});

	if (! state.partials) {
		await build_partials(state);
	}

	for (const in_file of files) {
		if (state.seen_files.has(in_file)) {
			continue;
		}

		state.seen_files.add(in_file);

		promises.push(
			render_markdown_file(state, in_file)
		);
	}

	await Promise.all(promises);
}

export async function render_markdown_file(state: BuildState, in_file: string) {
	const out_file = await map_input_file_to_output_file(state, in_file, [ '.md', '.markdown' ], '.html');
	const out_url = map_output_file_to_url(state, out_file);
	const { frontmatter, text, hash } = await read_text(in_file);

	if (frontmatter?.skip) {
		return;
	}

	if (file_hash_matches(state, in_file, hash)) {
		return skip_file(state, in_file, out_file, out_url, frontmatter);
	}
	
	await render_page(state, out_file, out_url, text, true, frontmatter);
	update_metadata(state, in_file, hash);
}