import { mkdir, cp, rm, readdir } from "fs/promises";
import { join } from "path";
import { renderIndex } from "./src/index";
import { renderLogin } from "./src/login";
import { renderKostenrechner } from "./src/kostenrechner";
import { renderFristenrechner } from "./src/fristenrechner";
import { renderDownloads } from "./src/downloads";
import { renderLinks } from "./src/links";
import { renderGlossary } from "./src/glossary";
import { renderGebuehrentabellen } from "./src/gebuehrentabellen";
import { renderChecklists } from "./src/checklists";
import { renderChecklistsDetail } from "./src/checklists-detail";
import { renderChecklistsInstance } from "./src/checklists-instance";
import { renderCourts } from "./src/courts";
import { renderProjects } from "./src/projects";
import { renderProjectsNew } from "./src/projects-new";
import { renderProjectsDetail } from "./src/projects-detail";
import { renderDeadlines } from "./src/deadlines";
import { renderDeadlinesNew } from "./src/deadlines-new";
import { renderDeadlinesDetail } from "./src/deadlines-detail";
import { renderDeadlinesCalendar } from "./src/deadlines-calendar";
import { renderAppointments } from "./src/appointments";
import { renderAppointmentsNew } from "./src/appointments-new";
import { renderAppointmentsDetail } from "./src/appointments-detail";
import { renderAppointmentsCalendar } from "./src/appointments-calendar";
import { renderSettings } from "./src/settings";
import { renderDashboard } from "./src/dashboard";
import { renderAgenda } from "./src/agenda";
import { renderOnboarding } from "./src/onboarding";
import { renderChangelog } from "./src/changelog";
import { renderTeam } from "./src/team";
import { renderAdmin } from "./src/admin";
import { renderAdminTeam } from "./src/admin-team";
import { renderNotFound } from "./src/notfound";

const DIST = join(import.meta.dir, "dist");

async function build() {
  // Clean dist/
  await rm(DIST, { recursive: true, force: true });
  await mkdir(join(DIST, "assets"), { recursive: true });

  // Bundle client-side JS
  const result = await Bun.build({
    entrypoints: [
      // app.ts is loaded on every page (SW registration + bottom-nav init +
      // install prompt). Keep it ahead of per-page bundles so name collisions
      // surface fast.
      join(import.meta.dir, "src/client/app.ts"),
      join(import.meta.dir, "src/client/index.ts"),
      join(import.meta.dir, "src/client/login.ts"),
      join(import.meta.dir, "src/client/kostenrechner.ts"),
      join(import.meta.dir, "src/client/fristenrechner.ts"),
      join(import.meta.dir, "src/client/downloads.ts"),
      join(import.meta.dir, "src/client/links.ts"),
      join(import.meta.dir, "src/client/glossary.ts"),
      join(import.meta.dir, "src/client/gebuehrentabellen.ts"),
      join(import.meta.dir, "src/client/checklists.ts"),
      join(import.meta.dir, "src/client/checklists-detail.ts"),
      join(import.meta.dir, "src/client/checklists-instance.ts"),
      join(import.meta.dir, "src/client/courts.ts"),
      join(import.meta.dir, "src/client/projects.ts"),
      join(import.meta.dir, "src/client/projects-new.ts"),
      join(import.meta.dir, "src/client/projects-detail.ts"),
      join(import.meta.dir, "src/client/deadlines.ts"),
      join(import.meta.dir, "src/client/deadlines-new.ts"),
      join(import.meta.dir, "src/client/deadlines-detail.ts"),
      join(import.meta.dir, "src/client/deadlines-calendar.ts"),
      join(import.meta.dir, "src/client/appointments.ts"),
      join(import.meta.dir, "src/client/appointments-new.ts"),
      join(import.meta.dir, "src/client/appointments-detail.ts"),
      join(import.meta.dir, "src/client/appointments-calendar.ts"),
      join(import.meta.dir, "src/client/settings.ts"),
      join(import.meta.dir, "src/client/dashboard.ts"),
      join(import.meta.dir, "src/client/agenda.ts"),
      join(import.meta.dir, "src/client/onboarding.ts"),
      join(import.meta.dir, "src/client/changelog.ts"),
      join(import.meta.dir, "src/client/team.ts"),
      join(import.meta.dir, "src/client/admin.ts"),
      join(import.meta.dir, "src/client/admin-team.ts"),
      join(import.meta.dir, "src/client/notfound.ts"),
    ],
    outdir: join(DIST, "assets"),
    naming: "[name].js",
    minify: true,
    // IIFE wraps each bundle's top-level scope so per-page modules don't
    // leak globals into each other. Without this, app.js's minified
    // `var d = "patholo-sidebar-pinned"` (the legacy sidebar storage key)
    // clobbered projects.js's minified `function d()` (applyTranslations)
    // on the global object — projects.js then crashed with
    // "TypeError: d is not a function" inside its DOMContentLoaded init,
    // making /projects appear empty (t-paliad-043).
    format: "iife",
  });

  if (!result.success) {
    console.error("JS build failed:");
    for (const log of result.logs) {
      console.error(log);
    }
    process.exit(1);
  }

  // Copy CSS
  await cp(
    join(import.meta.dir, "src/styles/global.css"),
    join(DIST, "assets/global.css"),
  );

  // Copy public/ → dist/ (manifest.json, sw.js, icons/) — served at the
  // application root so the service worker can claim scope=/ and so the
  // manifest is reachable at /manifest.json without a sub-path rewrite.
  await cp(
    join(import.meta.dir, "public"),
    DIST,
    { recursive: true },
  );

  // Stamp a unique version into sw.js so each deploy opens a fresh cache.
  // Activate-time eviction (in sw.js) deletes any prior cache, including
  // pre-versioning names like paliad-v1-static — that's what stops a stale
  // /assets/projects.js from a previous deploy lingering on a user's device.
  const swPath = join(DIST, "sw.js");
  const swSrc = await Bun.file(swPath).text();
  const buildVersion = `v${Date.now()}`;
  await Bun.write(swPath, swSrc.replace("__PALIAD_BUILD_VERSION__", buildVersion));

  // Render HTML pages
  await Bun.write(join(DIST, "index.html"), renderIndex());
  await Bun.write(join(DIST, "login.html"), renderLogin("login.js"));
  await Bun.write(join(DIST, "kostenrechner.html"), renderKostenrechner());
  await Bun.write(join(DIST, "fristenrechner.html"), renderFristenrechner());
  await Bun.write(join(DIST, "downloads.html"), renderDownloads());
  await Bun.write(join(DIST, "links.html"), renderLinks());
  await Bun.write(join(DIST, "glossary.html"), renderGlossary());
  await Bun.write(join(DIST, "gebuehrentabellen.html"), renderGebuehrentabellen());
  await Bun.write(join(DIST, "checklists.html"), renderChecklists());
  await Bun.write(join(DIST, "checklists-detail.html"), renderChecklistsDetail());
  await Bun.write(join(DIST, "checklists-instance.html"), renderChecklistsInstance());
  await Bun.write(join(DIST, "courts.html"), renderCourts());
  await Bun.write(join(DIST, "projects.html"), renderProjects());
  await Bun.write(join(DIST, "projects-new.html"), renderProjectsNew());
  await Bun.write(join(DIST, "projects-detail.html"), renderProjectsDetail());
  await Bun.write(join(DIST, "deadlines.html"), renderDeadlines());
  await Bun.write(join(DIST, "deadlines-new.html"), renderDeadlinesNew());
  await Bun.write(join(DIST, "deadlines-detail.html"), renderDeadlinesDetail());
  await Bun.write(join(DIST, "deadlines-calendar.html"), renderDeadlinesCalendar());
  await Bun.write(join(DIST, "appointments.html"), renderAppointments());
  await Bun.write(join(DIST, "appointments-new.html"), renderAppointmentsNew());
  await Bun.write(join(DIST, "appointments-detail.html"), renderAppointmentsDetail());
  await Bun.write(join(DIST, "appointments-calendar.html"), renderAppointmentsCalendar());
  await Bun.write(join(DIST, "settings.html"), renderSettings());
  await Bun.write(join(DIST, "dashboard.html"), renderDashboard());
  await Bun.write(join(DIST, "agenda.html"), renderAgenda());
  await Bun.write(join(DIST, "onboarding.html"), renderOnboarding());
  await Bun.write(join(DIST, "changelog.html"), renderChangelog());
  await Bun.write(join(DIST, "team.html"), renderTeam());
  await Bun.write(join(DIST, "admin.html"), renderAdmin());
  await Bun.write(join(DIST, "admin-team.html"), renderAdminTeam());
  await Bun.write(join(DIST, "notfound.html"), renderNotFound());

  // Append ?v=<buildVersion> to every /assets/*.js and /assets/*.css URL in
  // every emitted HTML file. Cache-Control alone isn't enough: a browser that
  // cached a script in a previous deploy keeps serving it from disk because
  // the cache entry was stored without the no-cache directive. Versioning the
  // URL changes the cache key, so the next page load fetches a fresh bundle
  // unconditionally \u2014 this is what guarantees t-paliad-043's IIFE wrap fix
  // actually reaches users on their next visit even without a SW.
  const htmlFiles = (await readdir(DIST)).filter((f) => f.endsWith(".html"));
  for (const f of htmlFiles) {
    const path = join(DIST, f);
    const html = await Bun.file(path).text();
    const stamped = html.replace(
      /(\/assets\/[\w-]+\.(?:js|css))/g,
      `$1?v=${buildVersion}`,
    );
    await Bun.write(path, stamped);
  }

  console.log("Build complete \u2192 dist/");
}

build();