"use strict";

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

const repositoryRoot = path.resolve(__dirname, "..", "..");
const webRoot = path.join(
  repositoryRoot,
  "src",
  "MBN_STOCK_WEBVIEW.LegacyParityApp",
  "Web");
const markup = fs.readFileSync(path.join(webRoot, "index.html"), "utf8");
const styles = fs.readFileSync(path.join(webRoot, "styles.css"), "utf8");
const app = fs.readFileSync(path.join(webRoot, "app.js"), "utf8");
const playout = fs.readFileSync(path.join(webRoot, "playout-ui.js"), "utf8");

function luminance(hex) {
  const channels = [1, 3, 5].map(index =>
    Number.parseInt(hex.slice(index, index + 2), 16) / 255);
  const linear = channels.map(channel => channel <= 0.04045
    ? channel / 12.92
    : ((channel + 0.055) / 1.055) ** 2.4);
  return 0.2126 * linear[0] + 0.7152 * linear[1] + 0.0722 * linear[2];
}

function contrast(left, right) {
  const bright = Math.max(luminance(left), luminance(right));
  const dark = Math.min(luminance(left), luminance(right));
  return (bright + 0.05) / (dark + 0.05);
}

test("operator inputs retain a visible three-to-one boundary", () => {
  const match = styles.match(/--ui-border-strong:\s*(#[0-9a-f]{6})/i);
  assert.ok(match, "strong control border token must exist");
  assert.ok(contrast(match[1], "#ffffff") >= 3,
    `control border contrast was ${contrast(match[1], "#ffffff").toFixed(2)}:1`);
});

test("playlist exposes independent candidate, selection, and PGM states", () => {
  assert.match(app, /element\.dataset\.active = isCandidate \? "true" : "false"/);
  assert.match(app, /"aria-selected",\s*presentation\.isSelected \? "true" : "false"/s);
  assert.match(app, /if \(presentation\.isOnAir\) accessibleStates\.push\("현재 PGM"\)/);
  assert.match(app, /if \(isCandidate\) accessibleStates\.push\("송출 후보"\)/);
  assert.match(app, /if \(presentation\.isSelected\) accessibleStates\.push\("삭제 선택됨"\)/);

  for (const selector of [
    '.playlist-data-row[data-active="true"]:not(.on-air)',
    '.playlist-data-row[aria-selected="true"]:not(.on-air)',
    '.playlist-data-row[data-active="true"][aria-selected="true"]:not(.on-air)',
    '.playlist-data-row.on-air',
    '.playlist-data-row.on-air[data-active="true"]',
    '.playlist-data-row.on-air[aria-selected="true"]',
    '.playlist-data-row.on-air[data-active="true"][aria-selected="true"]'
  ]) {
    assert.ok(styles.includes(selector), `${selector} must have an explicit visual state`);
  }
  assert.match(styles, /\.playlist-data-row\.on-air\s*\{[^}]*background:\s*#fdc8d2/i);
});

test("keyboard focus, high contrast, and scroll affordances remain visible", () => {
  assert.match(styles,
    /\.playlist-data-row:focus-visible[\s\S]*?outline:\s*3px solid var\(--ui-accent\)/);
  assert.match(styles, /@media \(forced-colors:\s*active\)/);
  assert.match(styles,
    /\.playlist-data-row\[data-active="true"\]\s*\{\s*border-top:\s*3px solid Highlight/);
  assert.match(styles,
    /\.playlist-data-row\[aria-selected="true"\]\s*\{\s*border-right:\s*3px solid Highlight/);
  assert.match(styles, /\.playlist-data-row\.on-air\s*\{\s*border-left:\s*4px double Highlight/);
  assert.match(styles, /scrollbar-width:\s*auto/);
  assert.match(styles, /scrollbar-gutter:\s*stable/);
  assert.match(styles, /scroll-padding-top:\s*29px/);
});

test("playout controls publish their real keyboard shortcuts", () => {
  assert.match(markup,
    /id="playout-take-in"[^>]*aria-label="TAKE IN"[^>]*aria-keyshortcuts="F8"/s);
  assert.match(markup,
    /id="playout-take-out"[^>]*aria-label="TAKE OUT"[^>]*aria-keyshortcuts="Escape"/s);
  assert.match(markup, /id="playout-next"[^>]*aria-label="NEXT"/s);
});

test("dry-run mode reads as information and clipped status keeps its full tooltip", () => {
  assert.match(playout,
    /connection\.classList\.toggle\("dry-run", playout\.mode === "dryRun"\)/);
  assert.match(styles, /\.connection-state\.dry-run:not\(\.outcome-unknown\)\s*\{/);
  assert.match(playout, /status\.title = status\.textContent/);
});