#!/usr/bin/env node

import fs from "fs"

function main() {

// Read package.json to get current version

const pkg = JSON.parse(fs.readFileSync("package.json", "utf8"))

const version = pkg.version

console.log(`Updating changelog for version ${version}...`)

// Read changelog

let changelog = fs.readFileSync("CHANGELOG.md", "utf8")

// Check if version already exists in changelog

const today = new Date().toISOString().split("T")[0] // YYYY-MM-DD format

const versionHeader = `## [${version}]`

const newVersionHeader = `## [${version}] - ${today}`

if (changelog.includes(newVersionHeader) || changelog.includes(versionHeader)) {

console.log(`Version ${version} already exists in changelog. Skipping update.`)

return

}

// Update [Unreleased] section to current version if it exists

const unreleasedHeader = "## [Unreleased]"

if (changelog.includes(unreleasedHeader)) {

console.log("Updating [Unreleased] section to current version...")

changelog = changelog.replace(unreleasedHeader, newVersionHeader)

// Add a new [Unreleased] section at the top for future changes

const changelogLines = changelog.split("\n")

const headerIndex = changelogLines.findIndex((line) => line.startsWith("## ["))

if (headerIndex !== -1) {

changelogLines.splice(headerIndex, 0, "## [Unreleased]", "")

changelog = changelogLines.join("\n")

}

// Write updated changelog back to file

fs.writeFileSync("CHANGELOG.md", changelog, "utf8")

console.log("✅ Updated CHANGELOG.md")

} else {

console.log("No [Unreleased] section found in changelog.")

}

}

main()