#!/usr/bin/env node
/**
 * ObsiGate — Inline edition tests (ROADMAP #93).
 *
 * « Editer » and « Forge » must replace the document read view instead of
 * opening an overlay on top of it (`#editor-container` is moved into the
 * content area, so the AI assistant sidebar stays usable while editing).
 *
 * Covers:
 *   - frontend/js/editor-inline.js  — DOM behaviour (mount/unmount/classes)
 *   - the wiring of that module in viewer.js / utils.js / sync.js / bookslm.js
 *     (static checks, like tests/frontend/toolbar-order.test.mjs)
 *   - the Forge iframe reload hook (frontend/editor-poc.html)
 *   - the CSS that makes the editor fill the content area (frontend/style.css)
 *
 * Usage: node tests/frontend/editor-inline.test.mjs
 */

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

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

const dom = new JSDOM(
  `<!DOCTYPE html><html><body>
    <div class="app-container">
      <div class="content-wrapper">
        <div class="content-area" id="content-area">
          <div class="file-header"><div class="file-title">Accueil</div></div>
          <div class="md-content" id="file-rendered-content"><p>Lecture</p></div>
        </div>
      </div>
    </div>
    <div class="editor-modal" id="editor-modal">
      <div class="editor-container" id="editor-container">
        <div class="editor-header"><span class="editor-brand">ObsiGate</span></div>
        <div class="editor-body editor-body-cm" id="editor-body"></div>
        <div class="editor-footer"></div>
      </div>
    </div>
  </body></html>`,
  { url: "https://example.com/", pretendToBeVisual: true },
);

const w = dom.window;
globalThis.window = w;
globalThis.document = w.document;
globalThis.HTMLElement = w.HTMLElement;
globalThis.Element = w.Element;
globalThis.Node = w.Node;

const mod = await import(
  pathToFileURL(path.join(REPO_ROOT, "frontend", "js", "editor-inline.js")).href
);
const {
  INLINE_CONTAINER_CLASS,
  INLINE_HOST_CLASS,
  INLINE_MODAL_CLASS,
  getEditorModal,
  getEditorContainer,
  getInlineHostArea,
  isInlineEditorActive,
  mountEditorInline,
  unmountEditorInline,
} = mod;

let testCount = 0;
let failCount = 0;

function test(name, fn) {
  testCount++;
  try {
    fn();
    console.log(`  ✓ ${name}`);
  } catch (err) {
    failCount++;
    console.error(`  ✗ ${name}\n    ${err.message}`);
    process.exitCode = 1;
  }
}

const modal = () => document.getElementById("editor-modal");
const container = () => document.getElementById("editor-container");
const area = () => document.getElementById("content-area");

function reset() {
  const c = container();
  const m = modal();
  if (c.parentElement !== m) m.appendChild(c);
  c.classList.remove(INLINE_CONTAINER_CLASS);
  m.classList.remove(INLINE_MODAL_CLASS);
  area().classList.remove(INLINE_HOST_CLASS);
  area().innerHTML = '<div class="md-content" id="file-rendered-content"><p>Lecture</p></div>';
  delete w._activePaneContentArea;
  delete w.PaneManager;
  delete w.getActiveContentArea;
}

console.log("Inline edition (#93) — editor-inline.js");

test("lookup helpers resolve the container and the host area", () => {
  reset();
  assert.equal(getEditorModal(), modal());
  assert.equal(getEditorContainer(), container());
  assert.equal(getInlineHostArea(), area());
  assert.equal(isInlineEditorActive(), false);
});

test("mount moves the container into the content area and drops the read view", () => {
  reset();
  assert.equal(mountEditorInline(area()), true);
  assert.equal(container().parentElement, area());
  assert.equal(area().querySelector(".md-content"), null, "read view replaced");
  assert.ok(container().classList.contains(INLINE_CONTAINER_CLASS));
  assert.ok(area().classList.contains(INLINE_HOST_CLASS));
  assert.ok(modal().classList.contains(INLINE_MODAL_CLASS));
  assert.equal(isInlineEditorActive(), true);
});

test("mount keeps the overlay mounted so the mobile ribbon keeps working", () => {
  reset();
  mountEditorInline(area());
  assert.ok(modal(), "overlay still in the document");
  assert.equal(container().closest("#editor-modal"), null, "container left the overlay");
});

test("mount is idempotent on the same host area", () => {
  reset();
  mountEditorInline(area());
  assert.equal(mountEditorInline(area()), true);
  assert.equal(area().querySelectorAll(".editor-container").length, 1);
});

test("mount refuses a missing area", () => {
  reset();
  assert.equal(mountEditorInline(null), false);
  assert.equal(isInlineEditorActive(), false);
});

test("unmount returns the host area, restores the overlay and clears classes", () => {
  reset();
  mountEditorInline(area());
  const host = unmountEditorInline();
  assert.equal(host, area());
  assert.equal(container().parentElement, modal());
  assert.equal(container().classList.contains(INLINE_CONTAINER_CLASS), false);
  assert.equal(area().classList.contains(INLINE_HOST_CLASS), false);
  assert.equal(modal().classList.contains(INLINE_MODAL_CLASS), false);
  assert.equal(isInlineEditorActive(), false);
  assert.equal(area().children.length, 0, "host area left empty for the read view re-render");
});

test("unmount without an inline session is a no-op", () => {
  reset();
  assert.equal(unmountEditorInline(), null);
  assert.equal(container().parentElement, modal());
});

test("host area follows the active pane in split view", () => {
  reset();
  const paneArea = document.createElement("div");
  paneArea.className = "content-area pane-content";
  document.body.appendChild(paneArea);
  w.PaneManager = { isSplit: () => true };
  w.getActiveContentArea = () => paneArea;
  assert.equal(getInlineHostArea(), paneArea);
  // A transient render override (pane-manager _renderFileInPane) wins.
  w._activePaneContentArea = area();
  assert.equal(getInlineHostArea(), area());
  assert.equal(mountEditorInline(paneArea), true);
  assert.equal(container().parentElement, paneArea);
  unmountEditorInline();
  paneArea.remove();
  reset();
});

// ── Static wiring checks ───────────────────────────────────────────────────

const read = (...parts) => readFileSync(path.join(REPO_ROOT, ...parts), "utf8");

const viewerSrc = read("frontend", "js", "viewer.js");
const utilsSrc = read("frontend", "js", "utils.js");
const syncSrc = read("frontend", "js", "sync.js");
const bookslmSrc = read("frontend", "js", "bookslm.js");
const indexSrc = read("frontend", "index.html");
const cssSrc = read("frontend", "style.css");
const forgeSrc = read("frontend", "editor-poc.html");

console.log("Inline edition (#93) — wiring");

test("index.html gives the editor container a stable id", () => {
  assert.match(indexSrc, /<div class="editor-container" id="editor-container">/);
});

test("viewer.js mounts the editor inline when rendering is taken over", () => {
  assert.match(viewerSrc, /import \{ isInlineEditorActive \} from '\.\/editor-inline\.js';/);
  const guard = viewerSrc.match(/export function renderFile\(data\) \{([\s\S]*?)\n  const area = getContentArea\(\);/);
  assert.ok(guard, "renderFile head not found");
  assert.match(guard[1], /if \(isInlineEditorActive\(\)\) detachInlineEditor\(\);/);
});

test("viewer.js Forge button mounts inline and sizes the iframe accordingly", () => {
  assert.match(viewerSrc, /var inline = activateInlineEditor\(data\.vault, data\.path\);/);
  assert.match(
    viewerSrc,
    /iframe\.style\.cssText = "width:100%;height:" \+ \(inline \? "100%" : "82vh"\) \+ ";border:none;display:block;";/,
  );
});

test("utils.js activateInlineEditor only takes over the displayed document", () => {
  const fn = utilsSrc.match(/export function activateInlineEditor\(([\s\S]*?)\n\}/);
  assert.ok(fn, "activateInlineEditor not found");
  assert.match(fn[1], /state\.currentVault !== vaultName \|\| state\.currentPath !== filePath/);
  assert.match(fn[1], /mountEditorInline\(area\)/);
});

test("utils.js openEditor mounts inline, closeEditor releases the host area", () => {
  assert.match(utilsSrc, /activateInlineEditor\(vaultName, filePath\);/);
  const close = utilsSrc.match(/function closeEditor\(\) \{([\s\S]*?)\n\}/);
  assert.ok(close, "closeEditor not found");
  assert.match(close[1], /const host = unmountEditorInline\(\);/);
  assert.match(close[1], /if \(host\) \{/);
});

test("utils.js detachInlineEditor tears the session down without re-rendering", () => {
  const fn = utilsSrc.match(/export function detachInlineEditor\(\) \{([\s\S]*?)\n\}/);
  assert.ok(fn, "detachInlineEditor not found");
  assert.match(fn[1], /if \(!isInlineEditorActive\(\)\) return;/);
  assert.match(fn[1], /state\.editorView\.destroy\(\)/);
  assert.match(fn[1], /unmountEditorInline\(\)/);
});

test("utils.js reloads the displayed document after an AI write", () => {
  const fn = utilsSrc.match(/async function reloadExternalWrite\(vault, path\) \{([\s\S]*?)\n\}/);
  assert.ok(fn, "reloadExternalWrite not found");
  assert.match(fn[1], /postMessage\(\{ type: 'parent-reload' \}, '\*'\)/);
  assert.match(fn[1], /suppressAutoSaveOnce = true;/);
  assert.match(utilsSrc, /window\.addEventListener\("obsigate:file-written"/);
  assert.match(utilsSrc, /if \(suppressAutoSaveOnce\) \{/, "autosave skipped on programmatic reload");
});

test("sync.js forge-close goes through the shared close path", () => {
  assert.match(syncSrc, /import \{ closeEditor \} from '\.\/utils\.js';/);
  const handler = syncSrc.match(/if \(e\.data\.type === 'forge-close'\) \{([\s\S]*?)\n    \}/);
  assert.ok(handler, "forge-close handler not found");
  assert.match(handler[1], /closeEditor\(\);/);
});

test("bookslm.js reports the edited document and the assistant writes", () => {
  assert.match(bookslmSrc, /const editing = this\._editingDocument\(\);/);
  assert.match(bookslmSrc, /if \(editing\) ctx\.editing = editing;/);
  assert.match(bookslmSrc, /this\._notifyFileWritten\(data\);/);
  const notify = bookslmSrc.match(/_notifyFileWritten\(data\) \{([\s\S]*?)\n  \}/);
  assert.ok(notify, "_notifyFileWritten not found");
  for (const tool of ["edit_file", "append_to_file", "create_file", "restore_backup"]) {
    assert.ok(notify[1].includes(`'${tool}'`), `${tool} missing from the write tools`);
  }
  assert.match(notify[1], /new CustomEvent\('obsigate:file-written'/);
});

test("editor-poc.html reloads Forge buffer on parent-reload", () => {
  assert.match(forgeSrc, /if \(e\.data\.type === 'parent-reload'\) \{/);
  const handler = forgeSrc.match(/if \(e\.data\.type === 'parent-reload'\) \{([\s\S]*?)\n    \}/);
  assert.ok(handler, "parent-reload handler not found");
  assert.match(handler[1], /clearTimeout\(saveTimer\);/);
  assert.match(handler[1], /loadFile\(\);/);
});

test("style.css lets the inline editor fill the content area", () => {
  assert.match(cssSrc, /\.editor-modal\.editor-inline-mode \{/);
  assert.match(cssSrc, /\.editor-modal\.editor-inline-mode \{[\s\S]*?pointer-events: none;/);
  assert.match(cssSrc, /\.content-area\.editor-inline-host,[\s\S]*?display: flex;/);
  const fill = cssSrc.match(/\.content-area\.editor-inline-host \.editor-container\.editor-inline,[\s\S]*?\{([\s\S]*?)\n\}/);
  assert.ok(fill, "inline container rule not found");
  assert.match(fill[1], /flex: 1;/);
  assert.match(fill[1], /height: auto;/, "must win over the mobile 100vh rule");
  assert.match(fill[1], /max-width: none;/);
});

// ── BUG-045: one scroll surface only in the CodeMirror editor ──
test("style.css: #editor-body scrolls through the CodeMirror scroller only", () => {
  const body = cssSrc.match(/\.editor-body\.editor-body-cm \{([^}]*)\}/);
  assert.ok(body, "combined .editor-body.editor-body-cm rule not found");
  assert.match(body[1], /overflow:\s*hidden;/, "editor body must not scroll itself");
  assert.match(body[1], /display:\s*flex;/);
  assert.match(body[1], /flex-direction:\s*column;/);
  const cm = cssSrc.match(/\.editor-body\.editor-body-cm \.cm-editor \{([^}]*)\}/);
  assert.ok(cm, ".cm-editor fill rule not found");
  assert.match(cm[1], /flex:\s*1 1 auto;/);
  assert.match(cm[1], /height:\s*auto;/, "100% height below the AI toolbar row caused the double scrollbar");
  // The global legacy override must be gone: scroller auto-height + forced overflow-y.
  assert.ok(!/\.cm-scroller \{[^}]*min-height:\s*100%;/.test(cssSrc),
    "global .cm-scroller min-height override reintroduces the double scrollbar");
});

console.log(`\n${testCount - failCount}/${testCount} tests passed`);
if (failCount > 0) {
  console.error(`${failCount} test(s) failed`);
  process.exit(1);
}