const path = require('path');

const fs = require('node:fs');

const { globSync }= require('glob');

function getRedirectionsFilePath() {

const redirectionsFilePath = path.join(__dirname, 'src', 'pages', 'redirects.json');

return path.resolve(redirectionsFilePath);

}

function readRedirectionsFile() {

const redirectionsFilePath = getRedirectionsFilePath();

return JSON.parse(fs.readFileSync(redirectionsFilePath)).data;

}

function writeRedirectionsFile(data) {

let redirectionsData =

{

"total" : data.length,

"offset": 0,

"limit": data.length,

"data" : data,

":type": "sheet"

};

let redirectionsFilePath = getRedirectionsFilePath();

fs.writeFileSync(redirectionsFilePath, JSON.stringify(redirectionsData));

}

function getMarkdownFiles() {

return globSync(__dirname + '/src/pages/**/*.md')

.map(f => path.resolve(f));

}

const getFindPatternForMarkdownFiles = (from) => `(\\[[^\\]]*]\\()(/|./)?(${from})(#[^\\()]*)?(\\))`;

const getReplacePatternForMarkdownFiles = (to) => `$1$2${to}$4$5`;

function replaceLinksInFile({ file, linkMap, getFindPattern, getReplacePattern }) {

let data = fs.readFileSync(file, 'utf8');

linkMap.forEach((to, from) => {

const find = getFindPattern(from);

const replace = getReplacePattern(to);

data = data.replaceAll(new RegExp(find, "gm"), replace);

});

fs.writeFileSync(file, data, 'utf-8');

}

module.exports = {

getRedirectionsFilePath,

readRedirectionsFile,

writeRedirectionsFile,

getMarkdownFiles,

getFindPatternForMarkdownFiles,

getReplacePatternForMarkdownFiles,

replaceLinksInFile

};