import * as fs from "node:fs"

const globalRegex = /    (?:var|function) (\w+)/g
const globalSymbols: string[] = []
let buffer = ''

for (const basename of fs.readdirSync("node_modules/@types/node/web-globals")) {
    buffer += fs.readFileSync("node_modules/@types/node/web-globals/" + basename, "utf8")
}

for (const match of buffer.matchAll(globalRegex)) {
    globalSymbols.push(match[0].trim())
}

const declarationRegex = /(?:^\/\*\*[\s\S]+?\*\/\n)?^(interface|type|declare \w+) (\w+).+\n(?:(?: .+\n)*};?\n)?/gm
const importableTypes=new Set<string>()
buffer = ''

for (const match of fs.readFileSync("node_modules/@types/web/index.d.ts", "utf8").matchAll(declarationRegex)) {
    if (!match[1].startsWith("declare")) {
        importableTypes.add(match[2])
        continue
    }
    if (globalSymbols.includes(match[1].replace("declare ","")+" "+match[2])) {
        buffer+=match[0].replace(/^declare /gm,"").replaceAll("\n","\n\t")
    }
}

buffer=`import type { \n\t${Array.from(importableTypes).join(",\n\t")}\n} from "@sugoidogo/importable-types-web"\ndeclare global {\n\t${buffer.trimEnd()}\n}`

fs.writeFileSync("index.d.ts", buffer, "utf8")
fs.copyFileSync("node_modules/@types/web/LICENSE.txt","LICENSE.txt")