import fs from "node:fs";

import path from "node:path";

import createEsmUtils from "esm-utils";

import semver from "semver";

const { __dirname } = createEsmUtils(import.meta);

export const changelogUnreleasedDirPath = path.join(

__dirname,

"../../changelog_unreleased",

);

export const changelogUnreleasedDirs = fs

.readdirSync(changelogUnreleasedDirPath, {

withFileTypes: true,

})

.filter((entry) => entry.isDirectory());

export function getEntries(dirPath) {

const fileNames = fs

.readdirSync(dirPath)

.filter((fileName) => path.extname(fileName) === ".md");

const entries = fileNames.map((fileName) => {

const [title, ...rest] = fs

.readFileSync(path.join(dirPath, fileName), "utf8")

.trim()

.split("\n");

const improvement = title.match(/\[IMPROVEMENT(:(\d+))?\]/u);

const section = title.includes("[HIGHLIGHT]")

? "highlight"

: title.includes("[BREAKING]")

? "breaking"

: improvement

? "improvement"

: undefined;

const order =

section === "improvement" && improvement[2] !== undefined

? Number(improvement[2])

: undefined;

const content = [processTitle(title), ...rest].join("\n");

return { fileName, section, order, content };

});

return entries;

}

export function printEntries(entries) {

const result = [];

if (entries.length > 0) {

entries.sort((a, b) => {

if (a.order !== undefined) {

return b.order === undefined ? 1 : a.order - b.order;

}

return a.fileName.localeCompare(b.fileName, "en", { numeric: true });

});

result.push(...entries.map((entry) => entry.content));

}

return result;

}

export function replaceVersions(data, prevVer, newVer, isPatch = false) {

if (semver.compare(prevVer, newVer) >= 0) {

throw new Error(

`[INVALID VERSION] Next version(${newVer}) should be greater than previous version(${prevVer}).`,

);

}

return data

.replaceAll(

/prettier stable/giu,

`Prettier ${isPatch ? prevVer : formatVersion(prevVer)}`,

)

.replaceAll(

/prettier main/giu,

`Prettier ${isPatch ? newVer : formatVersion(newVer)}`,

);

}

function formatVersion(version) {

return `${semver.major(version)}.${semver.minor(version)}`;

}

function processTitle(title) {

return title

.replaceAll(/\[(BREAKING|HIGHLIGHT|IMPROVEMENT(:\d+)?)\]/gu, "")

.replaceAll(/\s+/gu, " ")

.replace(/^#{4} [a-z]/u, (s) => s.toUpperCase())

.replaceAll(/(?<![[`])@([\w-]+)/gu, "[@$1](https://github.com/$1)")

.replaceAll(

/(?<![[`])#(\d{4,})/gu,

"[#$1](https://github.com/prettier/prettier/pull/$1)",

);

}