#!/usr/bin/env node
/**
 * ObsiGate — Mobile bottom toolbar clearance non-regression tests (BUG-073).
 *
 * Static checks (no jsdom — runs in the "Frontend unit tests" CI step):
 *  - BUG-073: the fixed bottom toolbar (#mobile-toolbar, 64px + safe-area)
 *    covered the last pixels of every document/page because the clearance
 *    rule in the ≤768px media block targeted `.main-layout` — a class that
 *    does not exist in index.html (the real layout container is
 *    `.main-body`). The dead selector reserved no space, so #content-area
 *    extended behind the bar and the end of the content could never be
 *    scrolled clear of it.
 *  - The clearance must live on `.main-body` inside the mobile media block
 *    (desktop keeps no padding), the dead `.main-layout` rules must be gone,
 *    reading mode (toolbar hidden) must reset the padding, and the
 *    now-playing rule must not double-count the toolbar zone.
 *
 * Usage: node tests/frontend/mobile-toolbar.test.mjs
 */

import { strict as assert } from "node:assert";
import { readFileSync } from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.join(__dirname, "..", "..");

const css = readFileSync(path.join(ROOT, "frontend", "style.css"), "utf8");
const indexHtml = readFileSync(path.join(ROOT, "frontend", "index.html"), "utf8");

function test(label, fn) {
  try {
    fn();
    console.log("  \u2713 " + label);
  } catch (err) {
    console.error("  \u2717 " + label + "\n    " + err.message);
    process.exitCode = 1;
  }
}

/** Body of the first @media (max-width: 768px) block whose body contains `needle`. */
function mobileBlockContaining(needle) {
  const marker = "@media (max-width: 768px)";
  // Les commentaires sont ignorés : un sélecteur cité dans une annotation
  // (ex. « .mobile-toolbar » dans un commentaire de style.css) ne doit pas
  // faire rétrograder ce helper sur le mauvais bloc mobile (BUG-103/CI #842).
  const source = css.replace(/\/\*[\s\S]*?\*\//g, "");
  let idx = 0;
  while ((idx = source.indexOf(marker, idx)) !== -1) {
    const open = source.indexOf("{", idx);
    let depth = 0;
    let end = open;
    for (; end < source.length; end++) {
      if (source[end] === "{") depth++;
      else if (source[end] === "}") {
        depth--;
        if (depth === 0) break;
      }
    }
    const body = source.slice(open + 1, end);
    if (body.includes(needle)) return body;
    idx = end + 1;
  }
  return null;
}

// ── The layout container the clearance must target exists in the DOM ───────
test("index.html — layout container .main-body and #mobile-toolbar both exist", () => {
  assert.match(indexHtml, /class="main-body"/, "index.html must define the .main-body layout container");
  assert.match(indexHtml, /class="mobile-toolbar"/, "index.html must define the .mobile-toolbar bar");
});

// ── BUG-073: clearance inside the mobile media block ────────────────────────
const toolbarBlock = mobileBlockContaining(".mobile-toolbar");

test("style.css — a ≤768px media block styles .mobile-toolbar", () => {
  assert.ok(toolbarBlock, "no @media (max-width: 768px) block contains .mobile-toolbar");
});

test("style.css — mobile clearance targets .main-body (64px + safe-area)", () => {
  assert.ok(toolbarBlock, "toolbar media block not found");
  assert.match(
    toolbarBlock,
    /\.main-body \{[^}]*padding-bottom:[^}]*calc\(64px \+ env\(safe-area-inset-bottom/,
    "the toolbar clearance must pad .main-body inside the mobile block (BUG-073: .main-layout does not exist in index.html)",
  );
});

test("style.css — dead .main-layout clearance rules are gone", () => {
  assert.ok(toolbarBlock, "toolbar media block not found");
  assert.doesNotMatch(
    toolbarBlock,
    /\.main-layout \{[^}]*padding-bottom/,
    ".main-layout clearance is a dead selector in index.html (BUG-073)",
  );
  assert.doesNotMatch(
    toolbarBlock,
    /\.editor-modal\.active ~ \.main-layout/,
    "the sibling clearance reset targeted a selector that never matches (BUG-073)",
  );
});

test("style.css — desktop .main-body carries no toolbar padding", () => {
  const base = css.match(/\.main-body \{[^}]*\}/);
  assert.ok(base, ".main-body base rule not found");
  assert.doesNotMatch(base[0], /padding-bottom/, "toolbar clearance must stay mobile-only");
});

// ── Companion rules ─────────────────────────────────────────────────────────
test("style.css — reading mode resets the clearance (toolbar hidden)", () => {
  assert.match(
    css,
    /body\.reading-mode \.main-body \{[^}]*padding-bottom: 0/,
    "reading mode hides #mobile-toolbar: .main-body must release the padding",
  );
});

test("style.css — np-active keeps only the dock zone (no toolbar double-count)", () => {
  assert.match(
    css,
    /body\.np-active \.content-area \{[^}]*padding-bottom: 76px/,
    "toolbar clearance now comes from .main-body: np-active must pad the dock zone only (76px)",
  );
  assert.doesNotMatch(
    css,
    /body\.np-active \.content-area \{[^}]*calc\(64px \+ env\(safe-area-inset-bottom[^}]*\+ 76px/,
    "the old formula double-counted the toolbar zone already cleared by .main-body",
  );
});

if (process.exitCode) {
  console.error("\nMobile toolbar tests FAILED");
} else {
  console.log("\nAll mobile toolbar tests passed.");
}