"use strict";

const test = require("node:test");
const assert = require("node:assert/strict");

let editorFactory;

function fakeNode(attributes) {
  const state = { ...attributes, visible: true };
  return {
    attr(value) {
      if (typeof value === "string") return state[value];
      Object.assign(state, value);
      return this;
    },
    onRendered() {}, onMove() {}, onMoveEnd() {},
    visible(value) {
      if (value === undefined) return state.visible;
      state.visible = Boolean(value);
      return state.visible;
    },
    redraw() {},
    toFront() {}, remove() {}, element: () => null
  };
}

async function loadEditorFactory() {
  if (editorFactory) return editorFactory;
  global.Element = class Element {
    constructor() {
      this.tagName = "DIV";
      this.id = "";
      this.classList = [];
      this.dataset = {};
    }
    closest() { return null; }
  };
  global.document = {
    currentScript: null,
    styleSheets: [],
    body: { append() {} },
    createElement: () => ({ style: {}, remove() {} })
  };
  global.window = {
    setTimeout,
    clearTimeout,
    requestAnimationFrame: (callback) => callback()
  };
  await import("../static/js/cmap/cmap-racket-wiki.js");
  editorFactory = global.window.RacketWikiCmap;
  return editorFactory;
}

test("back from a second nested submap returns exactly one map level", async () => {
  const factory = await loadEditorFactory();
  const map = {
    onSelection() {},
    onActivation() {},
    node: (attributes) => fakeNode(attributes)
  };
  const canvas = {
    addEventListener() {}, querySelector: () => null,
    clientWidth: 1200, clientHeight: 800, scrollLeft: 0, scrollTop: 0,
    isConnected: true
  };
  const editor = factory.createEditor(canvas, { createDiagramEngine: () => map });
  const first = editor.addItem({
    id: 1, kind: "submap", label: "First level", separateMap: true,
    mapReference: { id: "first", title: "First level" },
    x: 100, y: 100, width: 220, height: 70
  });
  first.submapInitialized = true;
  const second = editor.addItem({
    id: 2, kind: "submap", label: "Second level", separateMap: true,
    mapReference: { id: "second", title: "Second level" },
    parentSubmap: first, submapDepth: 1,
    x: 400, y: 200, width: 220, height: 70
  });
  second.submapInitialized = true;

  editor.openSubmapMap(first);
  editor.openSubmapMap(second);
  assert.equal(editor.activeMapRoot, second);
  assert.equal(editor.canStepBackWithinMap(), true,
    "the host must use local map history before navigating to a source CMap route");

  editor.openParentMap();

  assert.equal(editor.activeMapRoot, first);
  assert.equal(editor.canStepBackWithinMap(), false);
});

test("single-click selects and double-click edits every kind of concept", async () => {
  const factory = await loadEditorFactory();
  const map = {
    onSelection() {},
    onActivation() {},
    node: (attributes) => fakeNode(attributes)
  };
  const canvas = {
    addEventListener() {},
    querySelector: () => null,
    clientWidth: 1200, clientHeight: 800, scrollLeft: 0, scrollTop: 0,
    isConnected: true
  };
  const edited = [];
  const openedPages = [];
  const openedMaps = [];
  const editor = factory.createEditor(canvas, {
    createDiagramEngine: () => map,
    onEditItem: (record) => edited.push(record),
    onOpenPage: (record) => openedPages.push(record),
    onOpenCmap: (record) => openedMaps.push(record)
  });
  const ordinary = editor.addItem({ id: 1, label: "Ordinary" });
  const page = editor.addItem({ id: 2, label: "Page", pageSlug: "page" });
  const linkedMap = editor.addItem({ id: 3, label: "Linked map", cmapSlug: "other" });
  const submap = editor.addItem({ id: 4, kind: "submap", label: "Group" });

  editor.handleMapSelection(linkedMap.node, {
    target: new global.Element(),
    ctrlKey: false,
    metaKey: false,
    shiftKey: false
  });
  assert.equal(editor.selected(), linkedMap);
  assert.deepEqual(openedMaps, []);

  editor.handleMapActivation(ordinary.node, { preventDefault() {} });
  editor.handleMapActivation(page.node, { preventDefault() {} });
  editor.handleMapActivation(linkedMap.node, { preventDefault() {} });
  editor.handleMapActivation(submap.node, { preventDefault() {} });

  assert.deepEqual(edited, [ordinary, page, linkedMap, submap]);
  assert.deepEqual(openedPages, []);
  assert.deepEqual(openedMaps, []);
});

test("a linked CMap opens only through its arrow decorator", async () => {
  await loadEditorFactory();
  const { CmapItemDecorator } = await import(
    "../static/js/cmap/view/cmap-item-decorator.js");
  const listeners = new Map();
  const linkedButton = {
    dataset: {},
    addEventListener(type, listener) { listeners.set(type, listener); }
  };
  const elementListeners = new Map();
  const element = {
    dataset: {},
    style: {},
    classList: { add() {}, remove() {}, toggle() {} },
    setAttribute() {},
    addEventListener(type, listener) { elementListeners.set(type, listener); },
    querySelector(selector) {
      return selector === ".rw-cmap-open-linked" ? linkedButton : null;
    }
  };
  const openedMaps = [];
  const editor = {
    labels: { relation: "Relation" },
    selectedItems: new Set(),
    selectedItem: null,
    activeMapRoot: null,
    onOpenCmap: (record) => openedMaps.push(record),
    ensureCanvasExtent() {}
  };
  const record = {
    id: 1,
    kind: "concept",
    label: "Linked map",
    cmapSlug: "other",
    node: {
      attr(name) {
        return { x: 10, y: 20, width: 120, height: 50 }[name];
      }
    }
  };
  const decorator = new CmapItemDecorator(editor);
  decorator.fitItemToContent = () => {};

  decorator.decorateItem(record, element);

  assert.equal(elementListeners.has("click"), false,
    "the complete concept must not become a navigation target");
  listeners.get("click")({ preventDefault() {}, stopPropagation() {} });
  assert.deepEqual(openedMaps, [record]);
});

test("collapsed submap descendants stay hidden after the first render frame", async () => {
  const factory = await loadEditorFactory();
  const renderFrames = [];
  global.window.requestAnimationFrame = (callback) => renderFrames.push(callback);
  const map = {
    onSelection() {},
    onActivation() {},
    node: (attributes) => fakeNode(attributes)
  };
  const canvas = {
    addEventListener() {}, querySelector: () => null,
    clientWidth: 1200, clientHeight: 800, scrollLeft: 0, scrollTop: 0,
    isConnected: true
  };
  const editor = factory.createEditor(canvas, { createDiagramEngine: () => map });
  const submap = editor.addItem({ id: 1, kind: "submap", label: "Collapsed" });
  submap.expanded = false;
  const child = editor.addItem({ id: 2, label: "Hidden child", parentSubmap: submap });

  editor.applyCurrentContextLayout();
  assert.equal(child.node.visible(), false);

  child.node.visible(true);
  for (const renderFrame of renderFrames.splice(0)) renderFrame();

  assert.equal(child.node.visible(), false,
    "the post-render visibility pass hides a descendant exposed by initial rendering");
});

test("loading an unresolved connector retains it without a runtime error", async () => {
  const factory = await loadEditorFactory();
  global.window.requestAnimationFrame = (callback) => callback();
  const map = {
    onSelection() {},
    onActivation() {},
    node: (attributes) => fakeNode(attributes)
  };
  const canvas = {
    addEventListener() {}, querySelector: () => null,
    clientWidth: 1200, clientHeight: 800, scrollLeft: 0, scrollTop: 0,
    isConnected: true
  };
  const editor = factory.createEditor(canvas, { createDiagramEngine: () => map });
  const warnings = [];
  const originalWarn = console.warn;
  console.warn = (...values) => warnings.push(values);

  try {
    editor.loadDocument({
      schemaVersion: 2,
      concepts: [{ id: "concept-one", label: "One" }],
      items: [{
        id: 1, conceptId: "concept-one", kind: "concept",
        x: 20, y: 20, width: 120, height: 50
      }],
      connectors: [{
        id: 1, sourceId: 1, targetId: 999,
        hasArrow: true, lineColor: "#333", lineWidth: 2
      }]
    });
  } finally {
    console.warn = originalWarn;
  }

  assert.equal(editor.unresolvedConnectors.length, 1);
  assert.match(warnings[0][0], /relation retained without rendering/);
});