import { compareVersions, parseVersion } from './release-version.mjs';

export function previousRelease(version, releases) {

return releases

.filter((release) => {

if (release.draft) return false;

try {

return compareVersions(release.tag_name.replace(/^v/, ''), version) < 0;

} catch {

return false;

}

})

.sort((a, b) => compareVersions(b.tag_name.replace(/^v/, ''), a.tag_name.replace(/^v/, '')))[0];

}

const escape = (text) =>

Array.from(text)

.filter((char) => char.charCodeAt(0) >= 32 && char.charCodeAt(0) !== 127)

.join('')

.replace(/[\\`*_{}[\]<>#]/g, '\\$&');

export function releaseNotes({ repo, version, sha, previous, commits, assets }) {

parseVersion(version);

const groups = { features: [], fixes: [] };

const seen = new Set();

for (const item of commits) {

if (seen.has(item.sha)) continue;

seen.add(item.sha);

const [subject, ...body] = item.commit.message.split('\n');

const match = /^(feat|fix|perf|ux|ui)(?:\([^)]*\))?!?:\s*(.+)$/i.exec(subject);

if (!match) continue;

const title = escape(match[2].trim());

const detail = escape(

body

.filter((line) => !/^(?:Co-authored-by|Signed-off-by|Reviewed-by):/i.test(line))

.join(' ')

.replace(/\s+/g, ' ')

.trim(),

);

const bullet = `- **${title}**${detail ? ` — ${detail}` : ''} ([${item.sha.slice(0, 7)}](https://github.com/${repo}/commit/${item.sha}))`;

groups[match[1].toLowerCase() === 'feat' ? 'features' : 'fixes'].push(bullet);

}

const count = groups.features.length + groups.fixes.length;

const lines = [

`# PDFMathReader v${version}`,

'',

count

? `This release includes ${groups.features.length} new features and ${groups.fixes.length} fixes and improvements${previous ? ` since ${escape(previous.tag_name)}` : ''}. See the highlights below.`

: 'This release includes maintenance updates. See the full changelog for details.',

'',

`## ${version}`,

'',

];

for (const [key, title] of [

['features', 'New features'],

['fixes', 'Fixes and improvements'],

]) {

if (groups[key].length) lines.push(`### ${title}`, '', ...groups[key], '');

}

lines.push(

'## Update',

'',

'Quit PDFMathReader, download the package for your system below, replace the existing application, and reopen it. Your documents and settings are preserved.',

'',

);

const labels = {

'darwin-arm64': 'macOS Apple silicon',

'darwin-x64': 'macOS Intel',

'win32-x64': 'Windows x64',

'win32-ia32': 'Windows 32-bit',

'linux-x64': 'Linux x64',

'linux-armv7l': 'Linux ARMv7',

};

for (const path of assets) {

const name = path.split('/').at(-1);

const target = Object.keys(labels).find((key) => name.startsWith(`PDFMathReader-${key}.`));

if (!target) throw Error('Unknown release package: ' + name);

lines.push(

`- [${labels[target]}](https://github.com/${repo}/releases/download/v${version}/${encodeURIComponent(name)})`,

);

}

const url = previous

? `https://github.com/${repo}/compare/${encodeURIComponent(previous.tag_name)}...${sha}`

: `https://github.com/${repo}/commits/${sha}`;

lines.push('', `[Full changelog](${url})`, '');

return lines.join('\n');

}