const cookieAge = 60 * 60 * 24 * 365; // 1 year

let lastKnownToken: string | null = null;
function compareToken(token: string) {
  if (token === lastKnownToken) return true;
  lastKnownToken = fs.readFileSync(".clover/admin-token.txt", "utf8").trim();
  return token === lastKnownToken;
}

export async function middleware(c: Context, next: Next) {
  if (c.req.path.startsWith("/admin")) {
    return adminInner(c, next);
  }
  return next();
}

export function adminInner(c: Context, next: Next) {
  const token = c.req.header("Cookie")?.match(/admin-token=([^;]+)/)?.[1];

  if (c.req.path === "/admin/login") {
    const key = c.req.query("key");
    if (key) {
      if (compareToken(key)) {
        return c.body(null, 303, {
          "Location": "/admin",
          "Set-Cookie":
            `admin-token=${key}; Path=/; HttpOnly; SameSite=Strict; Max-Age=${cookieAge}`,
        });
      }
      return serveAsset(c, "/admin/login/fail", 403);
    }
    if (token && compareToken(token)) {
      return c.redirect("/admin", 303);
    }
    if (c.req.method === "POST") {
      return serveAsset(c, "/admin/login/fail", 403);
    } else {
      return serveAsset(c, "/admin/login", 200);
    }
  }

  if (c.req.path === "/admin/logout") {
    return c.body(null, 303, {
      "Location": "/admin/login",
      "Set-Cookie":
        `admin-token=; Path=/; HttpOnly; SameSite=Strict; Max-Age=0`,
    });
  }

  if (token && compareToken(token)) {
    return next();
  }

  return c.redirect("/admin/login", 303);
}

export function hasAdminToken(c: Context) {
  const token = c.req.header("Cookie")?.match(/admin-token=([^;]+)/)?.[1];
  return token && compareToken(token);
}

export async function main() {
  const key = crypto.randomUUID();
  await fs.writeMkdir(".clover/admin-token.txt", key);
  const start = ({
    win32: "start",
    darwin: "open",
  } as Record<string, string>)[process.platform] ?? "xdg-open";
  child_process.exec(`${start} http://[::1]:3000/admin/login?key=${key}`);
}

import * as fs from "#sitegen/fs";
import type { Context, Next } from "hono";
import { serveAsset } from "#sitegen/assets";
import * as child_process from "node:child_process";