const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const { pathToFileURL } = require('node:url');
const { JSDOM, VirtualConsole } = require('jsdom');
const { Console } = require('node:console');
const root = path.join(__dirname, '..');
const read = file => fs.readFileSync(path.join(root, file), 'utf8');
const tick = () => new Promise(resolve => setImmediate(resolve));
// The page's console goes to stderr, never stdout. node:test reads each test
// file's results back over stdout as serialized frames; app.js's own log line
// ("✅ App.js loaded") written there could land inside a frame and fail the
// whole file with "Unable to deserialize cloned data" — about 1 run in 4.
function pageConsole() {
  // jsdom 29 renamed sendTo() to forwardTo().
  return new VirtualConsole().forwardTo(new Console({ stdout: process.stderr, stderr: process.stderr }));
}

function browserGlobals(t, dom, fetch, toasts) {
  const values = { window: dom.window, document: dom.window.document, fetch, getAuthHeaders: () => ({ 'X-Test': 'synthetic' }), showToast: (...args) => toasts.push(args) };
  const originals = Object.keys(values).map(key => [key, Object.getOwnPropertyDescriptor(global, key)]);
  Object.assign(global, values);
  Object.assign(dom.window, { fetch, getAuthHeaders: values.getAuthHeaders });
  t.after(() => {
    for (const [key, descriptor] of originals) { if (descriptor) Object.defineProperty(global, key, descriptor); else delete global[key]; }
    dom.window.close();
  });
}

test('native admin initializer preserves lazy navigation, assistant actions and read-only ENV budget metadata', async t => {
  const dom = new JSDOM('<button class="tab-btn active" data-tab="home">Home</button><button class="tab-btn" data-tab="admin">Admin</button><div id="home-tab" class="tab-content" data-component="home" data-loaded="1"></div><div id="admin-tab" class="tab-content" data-component="admin"></div>', { runScripts: 'outside-only', url: 'https://app.example', virtualConsole: pageConsole() });
  const calls = []; const toasts = [];
  const fetch = async (url, options = {}) => {
    calls.push({ url, options });
    let data = {};
    if (url.startsWith('/components/admin.html?')) return { ok: true, text: async () => read('public/components/admin.html') };
    if (url === '/api/models') data = { models: [{ id: 'chat', name: 'Chat' }], defaultModel: 'chat' };
    if (url === '/api/admin/config') {
      assert.ok(document.getElementById('assistant-chat-model'), 'tabChanged fires after lazy markup exists');
      data = { success: true, conversationBudget: { limit: 240000, unit: 'characters', measure: 'UTF-16 code units', env: 'CLINICAL_ASSISTANT_CONVERSATION_CHARS', source: 'environment' }, config: [{ key: 'clinical_assistant.conversation_chars', value: '999999' }, { key: 'clinical_assistant.image_model', value: 'saved-image' }] };
    }
    if (url === '/api/admin/config/image-models/discover') data = { models: [{ id: 'image', name: 'Image' }] };
    if (url === '/api/admin/clinical-assistant/prompt-pool') data = { success: true, meta: { count: 3 }, snapshots: [{ id: 7, count: 3 }] };
    if (options.method) data = { success: true, duration: 1, response: 'Synthetic', meta: { count: 4 }, snapshots: [{ id: 7, count: 4 }] };
    return { ok: true, json: async () => data };
  };
  browserGlobals(t, dom, fetch, toasts);
  await import(pathToFileURL(path.join(root, 'public/js/admin.js')).href);
  assert.equal(calls.length, 0, 'registration must not eagerly load assistant settings');
  // JSDOM does not execute native script tags. Import the unmodified ESM above,
  // then execute the real classic app entrypoint and its component loader.
  await tick();
  dom.window.eval(read('public/js/app.js'));
  document.dispatchEvent(new dom.window.Event('DOMContentLoaded'));
  await tick();
  assert.equal(document.getElementById('assistant-chat-model'), null);
  document.querySelector('[data-tab="admin"]').click();
  await tick(); await tick();
  assert.equal(document.getElementById('admin-tab').dataset.loaded, '1');
  assert.equal(document.getElementById('assistant-chat-model').options[0].textContent, 'Use global default (chat)');
  assert.equal(document.getElementById('assistant-image-model'), null, 'single image-model dropdown lives in workflow-image-settings');
  assert.match(document.getElementById('assistant-prompt-pool-status').textContent, /3 prompts/);
  const budget = document.getElementById('assistant-conversation-budget');
  assert.equal(document.querySelectorAll('#assistant-conversation-chars').length, 0);
  assert.equal(budget.type, 'number', 'the conversation budget is an editable admin input');
  assert.equal(budget.readOnly, false, 'the budget is admin-editable');
  assert.equal(budget.value, '999999', 'prefilled with the saved override');
  const budgetMeta = document.getElementById('assistant-conversation-budget-meta').textContent;
  assert.match(budgetMeta, /CLINICAL_ASSISTANT_CONVERSATION_CHARS/);
  assert.match(budgetMeta, /Clear this field/, 'the admin is told how to get back to the environment value');
  assert.match(budgetMeta, /240,000/, 'and what that environment value currently is');
  const initialConfigLoads = calls.filter(c => c.url === '/api/admin/config').length;
  document.querySelector('[data-tab="home"]').click(); await tick();
  document.querySelector('[data-tab="admin"]').click(); await tick();
  assert.equal(calls.filter(c => c.url.startsWith('/components/admin.html?')).length, 1);
  assert.equal(calls.filter(c => c.url === '/api/admin/config').length, initialConfigLoads, 'initializer loads once across revisits');

  const writes = () => calls.filter(c => c.options.method === 'PUT');
  const save = document.getElementById('btn-save-assistant-config');
  save.click(); await tick();
  // Eight, not nine: the signed-out preview is a feature flag and is saved by
  // the Feature Flags card now, not by this button.
  assert.equal(writes().length, 8);
  assert.equal(writes().filter(c => /preview/.test(c.url)).length, 0,
    'this button no longer writes the preview flag');
  assert.deepEqual(writes().map(c => c.url.split('/').pop()).sort(), [
    'clinical_assistant.allowed_image_models', 'clinical_assistant.allowed_models', 'clinical_assistant.chat_model', 'clinical_assistant.context_chars', 'clinical_assistant.conversation_chars', 'clinical_assistant.search_limit', 'clinical_assistant.show_sources', 'clinical_assistant.translate_provider'
  ]);
  assert.ok(toasts.some(([message, kind]) => message === 'Assistant settings saved' && kind === 'success'));

  document.getElementById('btn-test-assistant-chat-model').click(); await tick();
  assert.deepEqual(JSON.parse(calls.find(c => c.url === '/api/admin/config/models/test').options.body), { modelId: 'chat' });
  document.getElementById('btn-regenerate-assistant-prompt-pool').click(); await tick();
  assert.equal(document.getElementById('btn-regenerate-assistant-prompt-pool').disabled, false);
  document.getElementById('assistant-prompt-pool-snapshots').value = '7';
  document.getElementById('btn-restore-assistant-prompt-pool').click(); await tick();
  assert.deepEqual(JSON.parse(calls.find(c => c.url.endsWith('/prompt-pool/restore')).options.body), { id: 7 });
  assert.equal(document.getElementById('assistant-custom-image-model'), null);
  assert.equal(document.getElementById('btn-test-assistant-image-model'), null);
  assert.equal(document.getElementById('btn-use-custom-assistant-image-model'), null);
  await tick();
});

test('real extracted initializer never invents a cap when metadata is missing, invalid or returns 503', async t => {
  const { initClinicalAssistantAdmin } = await import(pathToFileURL(path.join(root, 'public/js/admin/clinicalAssistant.js')).href);
  for (const data of [{}, { success: false, error: 'Invalid environment' }, { success: true, conversationBudget: { limit: 1000001 } }]) {
    await t.test(JSON.stringify(data), async t => {
      const dom = new JSDOM(read('public/components/admin.html'));
      browserGlobals(t, dom, async () => ({ status: 503, json: async () => data }), []);
      initClinicalAssistantAdmin(value => value);
      document.dispatchEvent(new dom.window.CustomEvent('tabChanged', { detail: { tab: 'admin' } }));
      await tick();
      assert.equal(document.getElementById('assistant-conversation-budget').value, '', 'failed load leaves the budget input empty');
      // The failure notice must land on the <p>; writing it to the <input>
      // rendered nothing, so admins saw a stale message on a broken load.
      assert.match(document.getElementById('assistant-conversation-budget-meta').textContent, /Conversation budget unavailable/);
      assert.doesNotMatch(document.getElementById('assistant-conversation-budget-meta').textContent, /Leave empty/, 'no misleading guidance when the load failed');
    });
  }
});

test('real extracted initializer displays the server default only when returned as metadata', async t => {
  const dom = new JSDOM(read('public/components/admin.html'));
  browserGlobals(t, dom, async () => ({ ok: true, json: async () => ({ success: true, config: [], models: [], conversationBudget: {
    limit: 120000, unit: 'characters', measure: 'UTF-16 code units', env: 'CLINICAL_ASSISTANT_CONVERSATION_CHARS', source: 'default'
  } }) }), []);
  const { initClinicalAssistantAdmin } = await import(pathToFileURL(path.join(root, 'public/js/admin/clinicalAssistant.js')).href);
  initClinicalAssistantAdmin(value => value);
  document.dispatchEvent(new dom.window.CustomEvent('tabChanged', { detail: { tab: 'admin' } }));
  await tick();
  // No saved override: the field stays EMPTY so Save cannot silently promote the
  // environment value into a stored override. The number is shown as a placeholder.
  const noOverride = document.getElementById('assistant-conversation-budget');
  assert.equal(noOverride.value, '', 'no override means an empty field, not a prefilled one');
  assert.equal(noOverride.placeholder, '120000', 'the effective limit is shown as a placeholder');
  assert.equal(noOverride.readOnly, false);
  assert.match(document.getElementById('assistant-conversation-budget-meta').textContent, /built-in default/,
    "source 'default' must not be reported as coming from the environment variable");
});

test('model availability comes from discovery, never hand-typed', () => {
  const html = read('public/components/admin.html');
  // A hand-typed id cannot be verified here, so the roster is exactly what the
  // gateway advertises.
  assert.doesNotMatch(html, /assistant-add-chat-model|assistant-add-image-model/, 'no manual entry field');
  assert.doesNotMatch(html, /data-assistant-add-model/, 'and no Add button');
  assert.match(html, /id="assistant-allowed-chat-models"/, 'the discovered roster stays');
  assert.match(html, /id="assistant-allowed-image-models"/);
});


// Image models had a discovery ENDPOINT but no UI, so the only way to reach a
// newly added gateway model was to already know its id.
test('image model discovery sits beside TTS and STT, and ends in a test', () => {
  const fs = require('node:fs');
  const path = require('node:path');
  const root = path.join(__dirname, '..');
  const html = fs.readFileSync(path.join(root, 'public/components/admin.html'), 'utf8');
  const js = fs.readFileSync(path.join(root, 'public/js/admin.js'), 'utf8');

  // Same shape as the two discovery cards it now sits between.
  ['admin-image-search', 'btn-discover-image', 'admin-image-discovered', 'admin-image-discover-hint']
    .forEach(id => assert.ok(html.includes('id="' + id + '"'), 'admin.html has #' + id));
  assert.ok(html.indexOf('id="admin-image-search"') > html.indexOf('id="admin-stt-search"'),
    'the image card follows the STT card');
  assert.ok(html.indexOf('id="admin-image-search"') < html.indexOf('id="admin-embed-search"'),
    'and precedes embeddings');

  assert.match(js, /if \(e\.target\.closest\('#btn-discover-image'\)\) discoverImageModels\(\);/);
  assert.match(js, /'\/api\/admin\/config\/image-models\/discover\?q=' \+ encodeURIComponent\(search\)/,
    'it calls the endpoint that already existed');
  // Unlike a voice there is no single default to Set: an image model belongs to
  // a workflow, so discovery ends in Test rather than Set.
  assert.match(js, /admin-image-test-btn/);
  assert.doesNotMatch(js, /admin-image-set-btn/);
  assert.match(js, /'\/api\/admin\/config\/image-models\/test'/);
});

// The Image models list waited on a dropdown that no longer exists, so only four
// hard-coded fallbacks appeared and there was no way to add a gateway model.
test('image models are added from Image Generation and offered from the Clinical Assistant list', () => {
  const fs = require('node:fs');
  const path = require('node:path');
  const root = path.join(__dirname, '..');
  const admin = fs.readFileSync(path.join(root, 'public/js/admin.js'), 'utf8');
  const ca = fs.readFileSync(path.join(root, 'public/js/admin/clinicalAssistant.js'), 'utf8');
  const server = fs.readFileSync(path.join(root, 'src/routes/adminConfig.js'), 'utf8');

  assert.match(admin, /admin-image-add-btn/, 'each discovered model has + Add');
  assert.match(admin, /'\/api\/admin\/config\/' \+ encodeURIComponent\('clinical_assistant\.image_model_roster'\)/);
  assert.match(admin, /new CustomEvent\('assistant-image-roster-changed'/, 'and the list updates at once');

  assert.doesNotMatch(ca, /IMAGE_MODEL_FALLBACKS/, 'no hard-coded fallbacks');
  assert.match(ca, /imageRosterSaved = parseAssistantList\(cfg\['clinical_assistant\.image_model_roster'\]\)/);
  assert.match(ca, /imageRoster = imageRosterSaved\.concat\(\[window\._assistantImageModelValue\]\)/);
  // A tick made but not saved survives an add from the other card.
  assert.match(ca, /savedImageAllowed = checkedAssistantModels\('assistant-allowed-image-models'\);\s*\n\s*renderAssistantImageModelCheckboxes\(\);/);

  assert.match(server, /key === 'clinical_assistant\.image_model_roster'/, 'the server validates the roster');
});