// Every DOM-widget panel must keep its contents inside the node.
//
// Three guards make that true, and the LoRA loader shipped without all
// three - its strength box and info button hung past the node's right edge:
//   1. box-sizing: border-box on the panel, so padding cannot render
//      outside the width the frontend allocates (content-box padding adds
//      to it);
//   2. an overflow clip on the panel, so anything that still ends up wider
//      paints inside the node instead of escaping it;
//   3. a minimum width wired through computeLayoutSize, so the node cannot
//      be resized below the narrowest width the panel's fixed-size controls
//      need (the legacy computeSize clamp holds the PANEL wide, but without
//      the layout minimum the NODE could shrink out from under it).
//
// This test is policy: every js/<name>/index.js that calls addDOMWidget
// either imports the shared video root (which carries the guards) or
// carries them itself. A new panel that forgets shows up here, not in a
// screenshot.

import assert from "node:assert/strict";
import test from "node:test";
import { readFileSync, readdirSync, statSync } from "node:fs";
import { dirname, join } from "node:path";
import { fileURLToPath } from "node:url";

const JS_ROOT = join(dirname(fileURLToPath(import.meta.url)), "..", "js");

function domWidgetEntries() {
  const entries = [];
  for (const name of readdirSync(JS_ROOT)) {
    const path = join(JS_ROOT, name, "index.js");
    try {
      statSync(path);
    } catch {
      continue;
    }
    const source = readFileSync(path, "utf-8");
    if (source.includes("addDOMWidget")) entries.push({ name, source });
  }
  return entries;
}

// The shared video root (js/shared/video_ui.mjs) carries border-box and
// overflow:hidden for everyone who mounts it.
const SHARED_ROOT_IMPORT = "ensureVideoCss";

test("the audit sees the panels it exists to guard", () => {
  const names = domWidgetEntries().map((entry) => entry.name);
  for (const expected of ["lora_loader", "load_video", "save_video"]) {
    assert.ok(names.includes(expected), `${expected} not found by the audit`);
  }
});

test("every DOM panel keeps padding inside its box and clips overflow", () => {
  for (const { name, source } of domWidgetEntries()) {
    if (source.includes(SHARED_ROOT_IMPORT)) continue;
    assert.match(
      source,
      /box-sizing:\s*border-box/,
      `${name}: panel CSS has no box-sizing: border-box - its padding widens it past the node`,
    );
    assert.match(
      source,
      /overflow(-x)?:\s*(hidden|clip)/,
      `${name}: panel CSS never clips overflow - oversized content escapes the node`,
    );
  }
});

test("every resizable DOM panel declares its minimum width to BOTH layout paths", () => {
  // No exemptions. input_preview was one while it was a pointer-transparent
  // thumbnail with nothing in it that could hang out; it now carries the
  // AUTO/MORE buttons and follows the node's height, so it needs a floor like
  // the rest.
  for (const { name, source } of domWidgetEntries()) {
    // Modern frontends read computeLayoutSize; older ones read the
    // minNodeSize option. Missing either leaves one frontend family able to
    // resize the node under the panel, which then holds its own minimum and
    // pokes past the border - the overflow clip cuts at the panel's edge,
    // not the node's.
    assert.match(
      source,
      /(computeLayoutSize\s*=\s*\(\)\s*=>\s*\(\{\s*\n?\s*minWidth|fillNodeHeight\([\s\S]{0,120}?minWidth)/,
      `${name}: DOM widget has no computeLayoutSize minWidth - the node can shrink out from under the panel`,
    );
    assert.match(
      source,
      /(options\.minNodeSize\s*=\s*\[|minNodeSize:\s*\[)/,
      `${name}: DOM widget has no minNodeSize - older frontends can shrink the node under the panel`,
    );
  }
});

test("a panel that should follow the node's height never declares computeSize", () => {
  // The layout walks widgets once (LGraphNode._arrangeWidgets):
  //   if (computeSize) -> fixed height, OUT of the free-space split
  //   else if (computeLayoutSize) -> joins distributeSpace
  // It is an else-if, so any computeSize wins and the panel is pinned. Every
  // stage/player/filmstrip in this pack derived that fixed height from the
  // node's WIDTH, which is why dragging a node taller only added dead space
  // underneath it. These panels go through fillNodeHeight instead, which
  // deletes computeSize and declares a floor with no ceiling.
  //
  // Listed here rather than derived, so adding a panel is a deliberate call:
  // is this a stage that should grow, or a fixed row?
  const mustGrow = new Set([
    "resolution",
    "compare",
    "image_crop_rotate_pad",
    "input_preview",
    "load_image_pad",
    "load_video",
    "lora_loader",
    "save_video",
    "show_text",
    "workflow_note",
  ]);
  // Fixed by design: a toolbar - content whose height is a constant, not a
  // viewport onto something bigger.
  //
  // input_preview used to sit here, and that was right while it showed a small
  // thumbnail of the node's INPUT. It now shows the node's own result, which
  // makes it a viewport like every other stage - and the reclassification was
  // missed when the behaviour changed, so Mask Refine, LaMa Inpaint and Select
  // Frame all shipped pinned at 140px with dead space under them. Moving a
  // panel between these two sets is the decision to review whenever what a
  // panel DISPLAYS changes, not just when a new one is added.
  //
  // lora_loader also sat here, and its pinned computeSize was how the stack's
  // rounded bottom border got clipped flat: the frontend insets a DOM widget's
  // element by a frame the exact-pixel sum never carried, and a pinned panel
  // is excluded from the free-space split so it could never absorb the
  // difference. It now grows: the stack flexes and the add button rides the
  // node's bottom edge.
  //
  // seed and run_timer are single rows of readouts and buttons under plain
  // widgets - a constant height by nature, nothing bigger behind them.
  const fixedByDesign = new Set(["run_timer", "save_image", "seed", "widget_cards"]);
  const seen = new Set();
  for (const { name, source } of domWidgetEntries()) {
    seen.add(name);
    if (fixedByDesign.has(name)) continue;
    assert.ok(
      mustGrow.has(name),
      `${name}: new DOM panel - add it to mustGrow (a stage that follows the `
        + "node) or fixedByDesign (a constant-height row) in this test",
    );
    assert.match(
      source,
      /fillNodeHeight\(/,
      `${name}: panel does not use fillNodeHeight - it will not follow the node's height`,
    );
    assert.doesNotMatch(
      source,
      /\.computeSize\s*=/,
      `${name}: panel assigns computeSize - that pins its height and undoes fillNodeHeight`,
    );
  }
  for (const name of mustGrow) {
    assert.ok(seen.has(name), `${name} is listed as a growing panel but the audit never saw it`);
  }
});

test("the preview picture never sets the panel's height", () => {
  // Nodes 2.0 lets a node's content decide its height (the saved size is only
  // a minimum). With the picture in normal flow, a portrait result drawn at
  // full width grew Save Image from 730 to about 1270 px, over the Run Timer
  // under it. Out of flow, the stage takes its size from the node alone and
  // the picture scales to fit, in both renderers.
  const source = readFileSync(join(JS_ROOT, "input_preview", "index.js"), "utf-8");
  const rule = source.match(/\.ausboss-input-preview-stage img,\s*\.ausboss-input-preview-stage video\s*\{([^}]*)\}/);
  assert.ok(rule, "the rule for the stage's picture is gone");
  assert.match(rule[1], /position:\s*absolute/, "the stage's picture is back in normal flow - it will size the node in Nodes 2.0");
  assert.match(rule[1], /max-width:\s*100%/, "the stage's picture can overflow the stage's width");
  assert.match(rule[1], /max-height:\s*100%/, "the stage's picture can overflow the stage's height");
});

test("the shared transform panel mounted on the video node also follows height", () => {
  // Video Crop + Rotate + Pad has no js/<name>/index.js of its own - it
  // registers through shared/transform_editor.mjs, so the audit above cannot
  // see it. Its fallback DOM widget is the one that used to pin 230px.
  const shared = readFileSync(join(JS_ROOT, "shared", "transform_editor.mjs"), "utf-8");
  assert.match(shared, /fillNodeHeight\(domWidget/);
  assert.doesNotMatch(
    shared,
    /domWidget\.computeSize\s*=/,
    "the shared transform panel pins its height again",
  );
});

test("every DOM panel discards planted layout widths", () => {
  // The frontend sizes the wrapper as `widget.width ?? node.width`, and
  // LiteGraph's layout PLANTS widget.width during draws. Once planted it
  // outranks the node width forever: resize the node narrower and the
  // wrapper keeps the old width, parking the row's controls outside the
  // border - which no overflow clip can fix, because the wrapper itself is
  // the thing that is too wide. keepDomWidgetWidthAuto discards the writes
  // so the lookup stays on its node-width fallback.
  for (const { name, source } of domWidgetEntries()) {
    assert.match(
      source,
      /keepDomWidgetWidthAuto\(/,
      `${name}: DOM widget never calls keepDomWidgetWidthAuto - a planted widget.width will outrank the node width`,
    );
  }
  const shared = readFileSync(join(JS_ROOT, "shared", "index.mjs"), "utf-8");
  assert.match(shared, /export function keepDomWidgetWidthAuto/);
  assert.match(shared, /get\(\)\s*\{\s*\n?\s*return undefined/);
});

test("every panel root class carries border-box and an overflow clip", () => {
  // The entries that style their own root, mapped to that root's class.
  // Entries mounting the shared video root are covered by its CSS, checked
  // in the shared-root test below.
  const roots = {
    // The lora panel's guards live on its BODY: the body is the panel's
    // layout box, and it carries both the border-box blanket and the
    // overflow clip by name.
    lora_loader: ".ausboss-lora-body {",
    compare: ".ausboss-compare-root{",
    input_preview: ".ausboss-input-preview{",
    resolution: ".ausboss-res-panel {",
    load_image_pad: ".ausboss-loadpad-root{",
    image_crop_rotate_pad: ".ausboss-transform-panel{",
    save_image: ".ausboss-save{",
    show_text: ".ausboss-show-text{",
    workflow_note: ".ausboss-note{",
    seed: ".ausboss-seed{",
    run_timer: ".ausboss-timer{",
  };
  for (const { name, source } of domWidgetEntries()) {
    const marker = roots[name];
    if (!marker) {
      assert.ok(
        source.includes(SHARED_ROOT_IMPORT),
        `${name}: unknown DOM panel - add its root class to this test's map, `
          + "or mount the shared video root",
      );
      continue;
    }
    assert.ok(source.includes(marker), `${name}: root rule ${marker} not found`);
    // A guard may come from the root's own rule or from a group selector
    // naming the root class (the lora panel takes border-box from a
    // blanket). Any selector occurrence followed closely by the declaration
    // counts; template interpolations close braces mid-rule, so windows
    // beat brace-matching here.
    const rootClass = marker.replace(/\s*\{$/, "");
    const guarded = (pattern, window) => {
      let from = 0;
      while (true) {
        const at = source.indexOf(rootClass, from);
        if (at < 0) return false;
        if (pattern.test(source.slice(at, at + window))) return true;
        from = at + rootClass.length;
      }
    };
    assert.ok(
      guarded(/box-sizing:\s*border-box/, 300),
      `${name}: no box-sizing: border-box reaches the root class`,
    );
    assert.ok(
      guarded(/overflow(-x)?:\s*(hidden|clip)/, 600),
      `${name}: no overflow clip reaches the root class`,
    );
  }
});

test("the shared video root really carries the guards it is trusted for", () => {
  const shared = readFileSync(join(JS_ROOT, "shared", "video_ui.mjs"), "utf-8");
  assert.match(shared, /ausboss-video-root\{[^}]*box-sizing:border-box/);
  assert.match(shared, /ausboss-video-root\{[^}]*overflow:hidden/);
});

test("the lora panel carries all three guards by name", () => {
  const source = readFileSync(join(JS_ROOT, "lora_loader", "index.js"), "utf-8");
  // Regexes cannot use [^}] here: the CSS lives in a template literal whose
  // ${...} interpolations close braces mid-rule. Slice the body rule out
  // by its neighbors instead.
  assert.match(
    source,
    /\.ausboss-lora-panel,\s*\.ausboss-lora-panel \*[\s\S]{0,120}box-sizing:\s*border-box/,
    "the border-box blanket over the panel and its children is gone",
  );
  const start = source.indexOf(".ausboss-lora-body {");
  const end = source.indexOf(".ausboss-lora-row", start);
  assert.ok(start > 0 && end > start, "the body rule is missing");
  const rule = source.slice(start, end);
  assert.ok(rule.includes("overflow: hidden"), "the body no longer clips overflow");
  assert.ok(rule.includes("width: 100%"), "the body no longer pins to the widget width");
  // height: 100% is the anti-clip guard: the body tracks whatever box the
  // frontend actually allocates and the flexible stack absorbs a shortfall,
  // so the stack's rounded bottom border cannot be cut flat again.
  assert.ok(rule.includes("height: 100%"), "the body no longer tracks the allocated height");
  // The declared floor must carry WIDGET_FRAME: the frontend insets the
  // element by a margin per side, and a floor without the allowance hands
  // the panel fewer CSS pixels than its rows need.
  assert.match(
    source,
    /minHeight:\s*\(\)\s*=>\s*panelHeight\(state\)\s*\+\s*WIDGET_FRAME/,
    "the height floor dropped the DOM-widget frame allowance",
  );
  // The floor follows the strength mode (a second box per row when model
  // and CLIP are separate), and it is built on PANEL_MIN_WIDTH.
  assert.match(source, /minWidth:\s*\(\)\s*=>\s*panelMinWidth\(state\)/);
  assert.match(source, /return PANEL_MIN_WIDTH \+ \(linked\(state\) \? 0 : SEPARATE_EXTRA_WIDTH\)/);
  assert.match(source, /minNodeSize:\s*\[PANEL_MIN_WIDTH/);
});

// A canvas panel is stretched by CSS to whatever box it is given, but its
// backing store is only resized when something draws. So a panel that paints
// into a canvas MUST redraw on element resize, or a node dragged to a new
// shape displays the last frame at the wrong aspect ratio.
//
// This bit Video Crop + Rotate + Pad: the observer lived inside a
// `kind === "image"` branch next to the interactive drag handlers, so the
// image node redrew and the video node did not. It only became visible once
// panels started taking the node's leftover height, because until then the
// box could not change shape without a width change to trigger a relayout.
//
// Panels that present media through <img>/<video> with object-fit: contain
// are exempt — the browser rescales those on any box, with no redraw.
test("every canvas-painting panel redraws when its element resizes", () => {
  const painters = ["shared/pad_panel.mjs", "shared/transform_editor.mjs"];
  for (const rel of painters) {
    const source = readFileSync(join(JS_ROOT, ...rel.split("/")), "utf-8");
    assert.ok(
      source.includes('getContext("2d")'),
      `${rel} no longer paints a canvas - drop it from this list`,
    );
    assert.match(
      source,
      /new ResizeObserver\(/,
      `${rel} paints a canvas but never observes its size`,
    );
  }
});

test("the transform panel observes resize for video as well as image", () => {
  const source = readFileSync(join(JS_ROOT, "shared", "transform_editor.mjs"), "utf-8");
  const observer = source.indexOf("state.panelResizeObserver = new ResizeObserver(");
  assert.ok(observer > 0, "the panel resize observer is gone");
  // Walk back to the guard that encloses it. Anything narrowing the observer
  // to one kind leaves the other painting stale frames into a resized box.
  const guard = source.lastIndexOf("if (", observer);
  const condition = source.slice(guard, source.indexOf(") {", guard));
  assert.ok(
    !condition.includes('kind === "image"') && !condition.includes('kind === "video"'),
    `the resize observer is gated on node kind: ${condition.trim()}`,
  );
});

// The frontend hides a DOM widget below a zoom threshold unless it opts out,
// and every AusBoss panel is the node's face: hidden, the node is an empty
// box. The video transform nodes shipped that way because their mount was
// the one addDOMWidget call without the flag.
test("every DOM widget stays visible when the graph is zoomed out", () => {
  const files = [];
  const walk = (dir) => {
    for (const name of readdirSync(dir)) {
      const path = join(dir, name);
      if (statSync(path).isDirectory()) walk(path);
      else if (/\.m?js$/.test(name)) files.push(path);
    }
  };
  walk(JS_ROOT);
  let calls = 0;
  for (const path of files) {
    const source = readFileSync(path, "utf-8");
    let from = 0;
    for (;;) {
      const start = source.indexOf("addDOMWidget(", from);
      if (start < 0) break;
      // Walk to the call's closing parenthesis.
      let depth = 0;
      let end = start + "addDOMWidget".length;
      for (; end < source.length; end += 1) {
        if (source[end] === "(") depth += 1;
        else if (source[end] === ")" && --depth === 0) break;
      }
      const call = source.slice(start, end + 1);
      from = end + 1;
      if (/typeof\s+node\.addDOMWidget|addDOMWidget\s*===|\.addDOMWidget\s*\?/.test(source.slice(start - 30, start + 13))) continue;
      calls += 1;
      assert.match(call, /hideOnZoom:\s*false/, `${path.slice(JS_ROOT.length + 1)}: addDOMWidget without hideOnZoom: false`);
    }
  }
  assert.ok(calls >= 14, `expected the pack's DOM widgets, found ${calls}`);
});