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path: root/src/popup/popup.js
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'use strict';

import { LANGUAGES, ERROR_CODES, RUNTIME_MESSAGES } from '../shared/constants.js';
import { defaultSettings } from '../shared/settings-schema.js';

const $enabled = /** @type {HTMLInputElement} */ (document.getElementById('enabled-toggle'));
const $model = /** @type {HTMLSelectElement} */ (document.getElementById('model-select'));
const $reload = /** @type {HTMLButtonElement} */ (document.getElementById('reload-models'));
const $modelStatus = /** @type {HTMLParagraphElement} */ (document.getElementById('model-status'));
const $language = /** @type {HTMLSelectElement} */ (document.getElementById('language-select'));
const $openOptions = /** @type {HTMLButtonElement} */ (document.getElementById('open-options'));

/** @type {string[]} current model list for change detection */
let knownModels = [];

function fillLanguages(selected) {
  $language.textContent = '';
  for (const lang of LANGUAGES) {
    const option = document.createElement('option');
    option.value = lang.code;
    option.textContent = lang.label;
    if (lang.code === selected) option.selected = true;
    $language.append(option);
  }
}

function fillModels(models, selected) {
  $model.textContent = '';
  if (models.length === 0) {
    const option = document.createElement('option');
    option.value = '';
    option.textContent = '(モデルなし / Ollama未起動)';
    $model.append(option);
  }
  for (const name of models) {
    const option = document.createElement('option');
    option.value = name;
    option.textContent = name;
    if (name === selected) option.selected = true;
    $model.append(option);
  }
  if (selected && !models.includes(selected)) {
    const option = document.createElement('option');
    option.value = selected;
    option.textContent = `${selected}(一覧にありません)`;
    option.selected = true;
    $model.append(option);
  }
}

function showStatus(message, isError) {
  $modelStatus.hidden = false;
  $modelStatus.textContent = message;
  $modelStatus.classList.toggle('error', Boolean(isError));
}

async function loadModels() {
  showStatus('モデル一覧を取得中…', false);
  try {
    const response = await browser.runtime.sendMessage({ type: RUNTIME_MESSAGES.LIST_MODELS });
    if (response && response.ok && Array.isArray(response.models)) {
      knownModels = response.models;
      const current = $model.value;
      fillModels(response.models, current);
      if (response.models.length === 0) {
        $modelStatus.hidden = true;
      } else {
        $modelStatus.hidden = true;
      }
    } else {
      const code = response && response.error;
      if (code === ERROR_CODES.OLLAMA_UNAVAILABLE) {
        showStatus('Ollamaに接続できません。', true);
      } else {
        showStatus('モデル一覧の取得に失敗しました。', true);
      }
      fillModels([], $model.value);
    }
  } catch {
    showStatus('モデル一覧の取得に失敗しました。', true);
  }
}

async function loadSettings() {
  const result = await browser.storage.local.get({ settings: null });
  const settings = result.settings || defaultSettings();
  $enabled.checked = Boolean(settings.enabled);
  $language.value = settings.targetLanguage || 'ja';
  fillModels(knownModels, settings.model || '');
  if (settings.model) {
    // Preserve the stored model even before the first list load.
    fillModels(knownModels.length ? knownModels : [settings.model], settings.model);
  }
}

async function persist(patch) {
  const result = await browser.storage.local.get({ settings: null });
  const settings = result.settings || defaultSettings();
  const merged = { ...settings, ...patch };
  await browser.storage.local.set({ settings: merged });
}

$enabled.addEventListener('change', () => {
  void persist({ enabled: $enabled.checked });
});

$model.addEventListener('change', () => {
  const value = $model.value;
  if (value) void persist({ model: value });
});

$language.addEventListener('change', () => {
  void persist({ targetLanguage: $language.value });
});

$reload.addEventListener('click', () => {
  void loadModels();
});

$openOptions.addEventListener('click', () => {
  browser.runtime.openOptionsPage();
});

// Init
for (const language of LANGUAGES) {
  const option = document.createElement('option');
  option.value = language.code;
  option.textContent = language.label;
  $language.append(option);
}
void (async () => {
  await loadSettings();
  await loadModels();
})();