#!/usr/bin/env node
/**
 * ObsiGate — Audio/video viewer tests (roadmap #109).
 *
 * Pure helpers (formatMediaDuration / buildMediaUrl) are evaluated in a VM
 * sandbox to avoid importing the full browser-only viewer chain. The rest are
 * static checks on the source, CSS and backend wiring.
 *
 * Usage: node tests/frontend/media-viewer.test.mjs
 */

import { strict as assert } from "node:assert";
import { readFileSync } from "node:fs";
import vm from "node:vm";
import path from "node:path";
import { fileURLToPath } from "node:url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const ROOT = path.join(__dirname, "..", "..");

const viewer = readFileSync(path.join(ROOT, "frontend", "js", "viewer.js"), "utf8");
const utils = readFileSync(path.join(ROOT, "frontend", "js", "utils.js"), "utf8");
const css = readFileSync(path.join(ROOT, "frontend", "style.css"), "utf8");
const sw = readFileSync(path.join(ROOT, "frontend", "sw.js"), "utf8");
const main = readFileSync(path.join(ROOT, "backend", "main.py"), "utf8");
const fr = readFileSync(path.join(ROOT, "frontend", "locales", "fr.json"), "utf8");
const en = readFileSync(path.join(ROOT, "frontend", "locales", "en.json"), "utf8");

function test(label, fn) {
  try {
    fn();
    console.log("  \u2713 " + label);
  } catch (err) {
    console.error("  \u2717 " + label + "\n    " + String(err.message).slice(0, 300));
    process.exitCode = 1;
  }
}

// ── Pure helpers (VM sandbox) ──────────────────────────────────────────────
const begin = viewer.indexOf("export function formatMediaDuration");
const end = viewer.indexOf("function buildDownloadUrl");
assert.ok(begin !== -1 && end > begin, "media viewer helper block not found");
const sandbox = {};
vm.createContext(sandbox);
vm.runInContext(
  `${viewer.slice(begin, end).replace(/\bexport /g, "")}\nglobalThis.formatMediaDuration = formatMediaDuration; globalThis.buildMediaUrl = buildMediaUrl;`,
  sandbox,
);
const { formatMediaDuration, buildMediaUrl } = sandbox;

test("formatMediaDuration renders m:ss and h:mm:ss", () => {
  assert.equal(formatMediaDuration(0), "0:00");
  assert.equal(formatMediaDuration(65), "1:05");
  assert.equal(formatMediaDuration(3725), "1:02:05");
  assert.equal(formatMediaDuration(NaN), "");
  assert.equal(formatMediaDuration(-1), "");
});

test("buildMediaUrl encodes vault and path", () => {
  const url = buildMediaUrl("My Vault", "café clip.mp4");
  assert.equal(url, "/api/media/My%20Vault?path=caf%C3%A9%20clip.mp4");
});

// ── Static checks: viewer wiring ───────────────────────────────────────────
test("viewer.js dispatches is_audio / is_video to the media viewers", () => {
  assert.match(viewer, /if \(data\.is_audio\) \{\s*renderAudioViewer\(area, data\);/);
  assert.match(viewer, /if \(data\.is_video\) \{\s*renderVideoViewer\(area, data\);/);
});

test("audio viewer uses a native <audio> element and stream URL", () => {
  const start = viewer.indexOf("export function renderAudioViewer");
  const stop = viewer.indexOf("export function renderVideoViewer");
  assert.ok(start !== -1 && stop > start, "renderAudioViewer block not found");
  const block = viewer.slice(start, stop);
  assert.match(block, /el\("audio"/);
  assert.match(block, /controls: ""/);
  assert.match(block, /data\.stream_url \|\| buildMediaUrl/);
});

test("video viewer uses a native <video> element with playsinline", () => {
  const start = viewer.indexOf("export function renderVideoViewer");
  const stop = viewer.indexOf("export function renderFile");
  assert.ok(start !== -1 && stop > start, "renderVideoViewer block not found");
  const block = viewer.slice(start, stop);
  assert.match(block, /el\("video"/);
  assert.match(block, /playsinline: ""/);
});

test("unsupported codec triggers the binary fallback UI", () => {
  assert.match(viewer, /audio\.addEventListener\("error",\s*\(\)\s*=>\s*\{\s*renderMediaFallback/);
  assert.match(viewer, /video\.addEventListener\("error",\s*\(\)\s*=>\s*\{\s*renderMediaFallback/);
  assert.match(viewer, /export function renderMediaFallback/);
});

test("playback is stopped when the content area is re-rendered", () => {
  assert.match(viewer, /_mediaViewerCleanup/);
  assert.match(viewer, /_mediaViewerCleanup\(\); _mediaViewerCleanup = null;/);
});

// ── Static checks: CSS ─────────────────────────────────────────────────────
test("style.css defines the audio/video viewer layout", () => {
  assert.match(css, /\.audio-viewer-container/);
  assert.match(css, /\.audio-stage\s*\{/);
  assert.match(css, /\.audio-artwork\s*\{/);
  assert.match(css, /\.video-stage\s*\{/);
  assert.match(css, /\.video-player\s*\{/);
});

// ── Static checks: icons, i18n, service worker ─────────────────────────────
test("utils.js maps media extensions to audio-lines / video icons", () => {
  assert.match(utils, /"\.mp3": "audio-lines"/);
  assert.match(utils, /"\.flac": "audio-lines"/);
  assert.match(utils, /"\.mp4": "video"/);
  assert.match(utils, /"\.webm": "video"/);
});

test("media viewer strings exist in FR and EN", () => {
  for (const key of ["viewer.media_unsupported", "viewer.media_too_large"]) {
    assert.match(fr, new RegExp(`"${key}"`));
    assert.match(en, new RegExp(`"${key}"`));
  }
});

test("service worker never caches streamed media", () => {
  assert.match(sw, /startsWith\('\/api\/media\/'\)/);
  assert.match(sw, /endsWith\('\/thumb'\)/);
});

// ── Static checks: backend ─────────────────────────────────────────────────
test("backend exposes /api/media and the shared Range helper", () => {
  assert.match(main, /@app\.get\("\/api\/media\/\{vault_name\}"/);
  assert.match(main, /def _stream_file_with_range\(/);
  assert.match(main, /AUDIO_EXTENSIONS|is_audio/);
  assert.match(main, /is_audio\(ext\) or is_video\(ext\)/);
});

if (process.exitCode) {
  console.error("\nMedia viewer tests FAILED");
} else {
  console.log("\nAll media viewer tests passed.");
}