const fountain = require('../../vendor/fountain.min.js');

const fountainCss = function() {
	return [
		{
			inline: true,
			mime: 'text/css',
			text: `
				.fountain {
					font-family: monospace;
					line-height: 107%;
					max-width: 1000px;
					margin-left: auto;
					margin-right: auto;
				}

				.fountain .title-page,
				.fountain .page { 
					box-shadow: 0 0 5px rgba(0,0,0,0.1);
					border: 1px solid #d2d2d2;
					padding: 10%;
					margin-bottom: 2em;
				}

				.fountain h1,
				.fountain h2,
				.fountain h3,
				.fountain h4,
				.fountain p {
					font-weight: normal;
					line-height: 107%;
					margin: 1em 0;
					border: none;
					font-size: 1em;
				}

				.fountain .bold {
					font-weight: bold;
				}

				.fountain .underline {
					text-decoration: underline;
				}

				.fountain .centered {
					text-align: center;
				}

				.fountain h2 {
					text-align: right;
				}

				.fountain .dialogue p.parenthetical {
					margin-left: 11%;
				}

				.fountain .title-page .credit,
				.fountain .title-page .authors,
				.fountain .title-page .source {
					text-align: center;
				}

				.fountain .title-page h1 {
					margin-bottom: 1.5em;
					text-align: center;
				}

				.fountain .title-page .source {
					margin-top: 1.5em;
				}

				.fountain .title-page .notes {
					text-align: right;
					margin: 3em 0;
				}

				.fountain .title-page h1 {
					margin-bottom: 1.5em;
					text-align: center;
				}

				.fountain .dialogue {
					margin-left: 3em;
					margin-right: 3em;
				}

				.fountain .dialogue p,
				.fountain .dialogue h1,
				.fountain .dialogue h2,
				.fountain .dialogue h3,
				.fountain .dialogue h4 {
					margin: 0;
				}

				.fountain .dialogue h1,
				.fountain .dialogue h2,
				.fountain .dialogue h3,
				.fountain .dialogue h4 {
					text-align: center;
				}`,
		},
	];
};

function renderFountainScript(markdownIt, content) {
	const result = fountain.parse(content);

	return `
		<div class="fountain joplin-editable">
			<pre class="joplin-source" data-joplin-language="fountain" data-joplin-source-open="\`\`\`fountain&#10;" data-joplin-source-close="&#10;\`\`\`&#10;">${markdownIt.utils.escapeHtml(content)}</pre>
			<div class="title-page">
				${result.html.title_page}
			</div>
			<div class="page">
				${result.html.script}
			</div>
		</div>
	`;
}

function addContextAssets(context) {
	if ('fountain' in context.pluginAssets) return;

	context.pluginAssets['fountain'] = fountainCss();
}

function installRule(markdownIt, mdOptions, ruleOptions, context) {
	const defaultRender = markdownIt.renderer.rules.fence || function(tokens, idx, options, env, self) {
		return self.renderToken(tokens, idx, options);
	};

	markdownIt.renderer.rules.fence = function(tokens, idx, options, env, self) {
		const token = tokens[idx];
		if (token.info !== 'fountain') return defaultRender(tokens, idx, options, env, self);
		addContextAssets(context);
		return renderFountainScript(markdownIt, token.content);
	};
}

module.exports = {
	install: function(context, ruleOptions) {
		return function(md, mdOptions) {
			installRule(md, mdOptions, ruleOptions, context);
		};
	},
	style: fountainCss,
};