#!/usr/bin/env node
/**
 * ObsiGate — JSDOM tests for the native mobile editor UX (ROADMAP #69).
 *
 * Covers the pure helpers of frontend/js/mobile-editor.js (Markdown formatting,
 * swipe detection, zoom clamping) and the DOM wiring (floating toolbar, reading
 * mode toggling, bottom sheet construction). The swipe/navigation network paths
 * are exercised manually / in E2E.
 *
 * Usage: node tests/frontend/mobile-editor.test.mjs
 */

import { strict as assert } from "node:assert";
import { JSDOM } from "jsdom";
import { fileURLToPath, pathToFileURL } from "node:url";
import path from "node:path";
import { state } from "../../frontend/js/state.js";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
const REPO_ROOT = path.resolve(__dirname, "..", "..");

// ── JSDOM bootstrap ────────────────────────────────────────────────────────
const dom = new JSDOM(
  `<!DOCTYPE html><html><body>
    <div id="content-area"><div class="md-content"></div></div>
    <div class="editor-modal active" id="editor-modal">
      <div class="editor-container">
        <div class="editor-body editor-body-cm" id="editor-body">
          <div class="cm-editor"><div class="cm-scroller"></div></div>
        </div>
      </div>
    </div>
  </body></html>`,
  { url: "https://example.com/", pretendToBeVisual: true },
);

const w = dom.window;
globalThis.window = w;
globalThis.document = w.document;
Object.defineProperty(globalThis, "navigator", {
  value: w.navigator,
  configurable: true,
  writable: true,
});
globalThis.localStorage = w.localStorage;
globalThis.MutationObserver = w.MutationObserver;

const mod = await import(
  pathToFileURL(path.join(REPO_ROOT, "frontend", "js", "mobile-editor.js")).href
);

const {
  FORMAT_ACTIONS,
  MIN_EDITOR_FONT,
  MAX_EDITOR_FONT,
  clampZoom,
  detectSwipe,
  formatChange,
  insertText,
  applyFormatToTextarea,
  applyEditorFontSize,
  initMobileEditor,
  toggleReadingMode,
  isReadingMode,
  updateReadingButtonVisibility,
} = mod;

let testCount = 0;
let passCount = 0;

function test(name, fn) {
  testCount++;
  try {
    fn();
    console.log(`  ✓ ${name}`);
    passCount++;
  } catch (e) {
    console.log(`  ✗ ${name}`);
    console.log(`    ${e.message}`);
  }
}

console.log("\n── mobile-editor.js unit tests (#69) ──\n");

// ── Pure helpers ───────────────────────────────────────────────────────────
test("FORMAT_ACTIONS exposes the five expected actions", () => {
  assert.deepEqual(FORMAT_ACTIONS, ["bold", "italic", "code", "list", "link"]);
});

test("clampZoom clamps to [min, max] and falls back to 13.5", () => {
  assert.equal(clampZoom(5), MIN_EDITOR_FONT);
  assert.equal(clampZoom(100), MAX_EDITOR_FONT);
  assert.equal(clampZoom(16), 16);
  assert.equal(clampZoom("abc"), 13.5);
  assert.equal(clampZoom(NaN), 13.5);
});

test("detectSwipe returns null below the threshold", () => {
  assert.equal(detectSwipe(20, 0), null);
  assert.equal(detectSwipe(-20, 0), null);
});

test("detectSwipe ignores vertical-dominant gestures", () => {
  assert.equal(detectSwipe(10, 120), null);
});

test("detectSwipe detects left and right horizontal swipes", () => {
  assert.equal(detectSwipe(-90, 5), "left");
  assert.equal(detectSwipe(90, -5), "right");
});

test("formatChange bold wraps the selection", () => {
  const c = formatChange("hello world", 0, 5, "bold");
  assert.equal(c.changes.insert, "**hello**");
  assert.equal(c.changes.from, 0);
  assert.equal(c.changes.to, 5);
  assert.deepEqual(c.selection, { anchor: 2, head: 7 });
});

test("formatChange bold with no selection inserts markers and selects inside", () => {
  const c = formatChange("abc", 1, 1, "bold");
  assert.equal(c.changes.insert, "****");
  assert.deepEqual(c.selection, { anchor: 3, head: 3 });
});

test("formatChange bold toggles off when markers are selected", () => {
  const c = formatChange("**hi**", 0, 6, "bold");
  assert.equal(c.changes.insert, "hi");
  assert.deepEqual(c.selection, { anchor: 0, head: 2 });
});

test("formatChange italic and code use the right markers", () => {
  assert.equal(formatChange("x", 0, 1, "italic").changes.insert, "*x*");
  assert.equal(formatChange("x", 0, 1, "code").changes.insert, "`x`");
});

test("formatChange list prefixes each selected line", () => {
  const c = formatChange("a\nb\nc", 0, 5, "list");
  assert.equal(c.changes.insert, "- a\n- b\n- c");
  assert.equal(c.changes.from, 0);
  assert.equal(c.changes.to, 5);
});

test("formatChange list toggles an existing list off", () => {
  const c = formatChange("- a\n- b", 0, 7, "list");
  assert.equal(c.changes.insert, "a\nb");
});

test("formatChange list only affects the lines spanned by the cursor", () => {
  const c = formatChange("head\nbody\ntail", 5, 5, "list");
  assert.equal(c.changes.insert, "- body");
  assert.equal(c.changes.from, 5);
  assert.equal(c.changes.to, 9);
});

test("formatChange link builds [selection](url) and selects the url", () => {
  const c = formatChange("click", 0, 5, "link");
  assert.equal(c.changes.insert, "[click](url)");
  assert.deepEqual(c.selection, { anchor: 8, head: 11 });
});

test("formatChange returns null for an unknown action", () => {
  assert.equal(formatChange("abc", 0, 0, "strike"), null);
});

test("insertText builds an insertion change at the cursor", () => {
  const c = insertText(2, 2, "pasted");
  assert.deepEqual(c.changes, { from: 2, to: 2, insert: "pasted" });
  assert.deepEqual(c.selection, { anchor: 8, head: 8 });
});

// ── Textarea application ───────────────────────────────────────────────────
test("applyFormatToTextarea formats the current textarea selection", () => {
  const ta = w.document.createElement("textarea");
  ta.value = "hello world";
  ta.selectionStart = 0;
  ta.selectionEnd = 5;
  assert.equal(applyFormatToTextarea(ta, "bold"), true);
  assert.equal(ta.value, "**hello** world");
  assert.equal(ta.selectionStart, 2);
  assert.equal(ta.selectionEnd, 7);
});

test("applyFormatToTextarea returns false without an element", () => {
  assert.equal(applyFormatToTextarea(null, "bold"), false);
});

// ── DOM wiring ─────────────────────────────────────────────────────────────
test("initMobileEditor builds the floating toolbar with the five actions", () => {
  initMobileEditor();
  const bar = w.document.getElementById("me-toolbar");
  assert.ok(bar, "toolbar exists");
  for (const action of FORMAT_ACTIONS) {
    assert.ok(w.document.getElementById("me-fmt-" + action), action + " button exists");
  }
  assert.ok(w.document.getElementById("me-paste"), "paste button exists");
  assert.ok(w.document.getElementById("me-resize-handle"), "resize handle exists");
});

test("initMobileEditor is idempotent", () => {
  initMobileEditor();
  const bars = w.document.querySelectorAll("#me-toolbar");
  assert.equal(bars.length, 1);
});

test("applyEditorFontSize persists and clamps the size", () => {
  const applied = applyEditorFontSize(999);
  assert.equal(applied, MAX_EDITOR_FONT);
  assert.equal(localStorage.getItem("obsigate-editor-font-size"), String(MAX_EDITOR_FONT));
});

test("toggleReadingMode toggles the body class and localStorage", () => {
  assert.equal(isReadingMode(), false);
  assert.equal(toggleReadingMode(true), true);
  assert.equal(isReadingMode(), true);
  assert.equal(localStorage.getItem("obsigate-reading-mode"), "1");
  assert.equal(toggleReadingMode(false), false);
  assert.equal(isReadingMode(), false);
  assert.equal(localStorage.getItem("obsigate-reading-mode"), "0");
});

test("reading mode exposes enter and exit controls", () => {
  assert.ok(w.document.getElementById("me-reading-btn"), "enter button exists");
  assert.ok(w.document.getElementById("me-reading-exit"), "exit button exists");
});

test("reading button only shows while a file is open", () => {
  const btn = w.document.getElementById("me-reading-btn");
  state.currentPath = null;
  updateReadingButtonVisibility();
  assert.ok(btn.hidden, "hidden without an open file");
  state.currentPath = "Notes/note.md";
  updateReadingButtonVisibility();
  assert.ok(!btn.hidden, "shown when a file is open");
  state.currentPath = null;
  updateReadingButtonVisibility();
  assert.ok(btn.hidden, "hidden again once the file is closed");
});

test("reading button is hidden while the assistant panel is open", () => {
  const btn = w.document.getElementById("me-reading-btn");
  const panel = w.document.createElement("div");
  panel.className = "bookslm-panel open";
  w.document.body.appendChild(panel);
  state.currentPath = "Notes/note.md";
  updateReadingButtonVisibility();
  assert.ok(btn.hidden, "hidden while the assistant is expanded");
  panel.classList.add("hidden");
  updateReadingButtonVisibility();
  assert.ok(!btn.hidden, "shown again once the assistant is collapsed");
  panel.remove();
  state.currentPath = null;
  updateReadingButtonVisibility();
});

console.log(`\n${passCount}/${testCount} tests passed\n`);
process.exit(passCount === testCount ? 0 : 1);