import parse from './parse/index';
import validate from './validate/index';
import generate from './generators/dom/index';
import generateSSR from './generators/server-side-rendering/index';
import { assign } from './shared/index.js';
import { version } from '../package.json';
import { Parsed, CompileOptions, Warning } from './interfaces';

function normalizeOptions(options: CompileOptions): CompileOptions {
	return assign(
		{
			generate: 'dom',

			// a filename is necessary for sourcemap generation
			filename: 'SvelteComponent.html',

			onwarn: (warning: Warning) => {
				if (warning.loc) {
					console.warn(
						`(${warning.loc.line}:${warning.loc.column}) – ${warning.message}`
					); // eslint-disable-line no-console
				} else {
					console.warn(warning.message); // eslint-disable-line no-console
				}
			},

			onerror: (error: Error) => {
				throw error;
			},
		},
		options
	);
}

export function compile(source: string, _options: CompileOptions) {
	const options = normalizeOptions(_options);

	let parsed: Parsed;

	try {
		parsed = parse(source, options);
	} catch (err) {
		options.onerror(err);
		return;
	}

	validate(parsed, source, options);

	const compiler = options.generate === 'ssr' ? generateSSR : generate;

	return compiler(parsed, source, options);
}

export function create(source: string, _options: CompileOptions = {}) {
	_options.format = 'eval';

	const compiled = compile(source, _options);

	if (!compiled || !compiled.code) {
		return;
	}

	try {
		return new Function('return ' + compiled.code)();
	} catch (err) {
		if (_options.onerror) {
			_options.onerror(err);
			return;
		} else {
			throw err;
		}
	}
}

export { parse, validate, version as VERSION };