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import input from "fs";
class File {
constructor(name, size, parent) {
this.name = name;
this.fileSize = size;
this.parent = parent;
}
size() {
return this.fileSize;
}
}
class Directory {
constructor(name, parent) {
this.children = [];
this.name = name;
this.parent = parent;
}
add(child) {
this.children.push(child);
}
size() {
return this.children.reduce((acc, child) => acc + child.size(), 0);
}
searchDirectoresOfSizePredicate(sizeP) {
const dirs = [];
for (const child of this.children) {
if (child instanceof Directory) {
if (sizeP(child.size())) {
dirs.push(child);
}
dirs.push(...child.searchDirectoresOfSizePredicate(sizeP));
}
}
return dirs;
}
}
class OS {
constructor() {
this.root = new Directory("/", null);
this.current = this.root;
}
cd(path) {
if (path === "/") {
this.current = this.root;
} else if (path === ".." && this.current.parent) {
this.current = this.current.parent;
} else {
this.current = this.current.children.find((child) => child.name === path);
}
}
printFs() {
const print = (dir, depth) => {
for (const child of dir.children) {
console.log(" ".repeat(depth) + child.name);
if (child instanceof Directory) {
print(child, depth + 1);
}
}
};
print(this.root, 0);
}
}
const main = () => {
const os = new OS();
const lines = input.readFileSync("input", "utf8").split("\n");
let currentCommand = null;
for (const line of lines) {
if (line.startsWith("$")) {
const [command, path] = line.split(" ").splice(1);
if (command == "cd") os.cd(path);
currentCommand = command;
} else if (currentCommand == "ls") {
const [dirOrSize, name] = line.split(" ");
if (dirOrSize === "dir") {
const dir = new Directory(name, os.current);
os.current.add(dir);
} else {
const file = new File(name, parseInt(dirOrSize), os.current);
os.current.add(file);
}
}
}
//os.printFs();
console.log(
os.root
.searchDirectoresOfSizePredicate((size) => size <= 100000)
.reduce((a, x) => a + x.size(), 0)
);
const rootSize = os.root.size();
const freeSpace = 70000000 - rootSize;
console.log(
[...os.root.searchDirectoresOfSizePredicate(() => true), os.root]
.map((x) => x.size())
.filter((x) => freeSpace + x >= 30000000)
.reduce((a, x) => Math.min(a, x), Infinity)
);
};
main();
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