/* global chrome */

const LANGS = ['简体中文', '繁體中文', 'English', '日本語', '한국어', 'Français', 'Deutsch', 'Español', 'Português', 'Italiano', 'Русский', 'العربية', 'हिन्दी', 'ไทย', 'Việt Nam', 'Indonesia'].filter((v, i, a) => a.indexOf(v) === i);

const PRESETS = {
  deepseek:     { name: 'DeepSeek · 深度求索',        apiType: 'openai',    baseURL: 'https://api.deepseek.com/v1',                        model: 'deepseek-chat' },
  openai:       { name: 'OpenAI',                     apiType: 'openai',    baseURL: 'https://api.openai.com/v1',                         model: 'gpt-4o-mini' },
  kimi:         { name: '月之暗面 Kimi',               apiType: 'openai',    baseURL: 'https://api.moonshot.cn/v1',                        model: 'moonshot-v1-8k' },
  zhipu:        { name: '智谱 GLM（Flash 免费）',      apiType: 'openai',    baseURL: 'https://open.bigmodel.cn/api/paas/v4',              model: 'glm-4-flash' },
  qwen:         { name: '通义千问（阿里云百炼）',       apiType: 'openai',    baseURL: 'https://dashscope.aliyuncs.com/compatible-mode/v1', model: 'qwen-plus' },
  siliconflow:  { name: '硅基流动 SiliconFlow',        apiType: 'openai',    baseURL: 'https://api.siliconflow.cn/v1',                     model: 'Qwen/Qwen2.5-7B-Instruct' },
  gemini:       { name: 'Google Gemini',              apiType: 'gemini',    baseURL: 'https://generativelanguage.googleapis.com',        model: 'gemini-2.0-flash' },
  anthropic:    { name: 'Anthropic Claude',           apiType: 'anthropic', baseURL: 'https://api.anthropic.com',                         model: 'claude-3-5-haiku-latest' },
  ollama:       { name: 'Ollama（本地，无需 Key）',    apiType: 'openai',    baseURL: 'http://localhost:11434/v1',                         model: 'qwen2.5:7b' },
  custom:       { name: '自定义（OpenAI 兼容）',        apiType: 'openai',    baseURL: '',                                                  model: '' }
};

const FIELDS = ['preset', 'apiType', 'baseURL', 'apiKey', 'model', 'targetLang', 'sourceLang', 'triggerMode', 'systemPrompt', 'temperature', 'fontSize'];
const $ = id => document.getElementById(id);
let dirty = false;

async function init() {
  const cfg = await chrome.storage.sync.get({
    preset: 'deepseek', apiType: 'openai', baseURL: '', apiKey: '', model: '',
    targetLang: '简体中文', sourceLang: '自动检测', triggerMode: 'icon',
    systemPrompt: '', temperature: 0.3, fontSize: 16
  });

  // 服务商下拉
  const presetSel = $('preset');
  Object.entries(PRESETS).forEach(([k, v]) => {
    const o = document.createElement('option');
    o.value = k; o.textContent = v.name;
    presetSel.appendChild(o);
  });
  presetSel.value = cfg.preset in PRESETS ? cfg.preset : 'custom';

  // 语言下拉
  ['targetLang', 'sourceLang'].forEach(id => {
    const sel = $(id);
    (id === 'sourceLang' ? ['自动检测', ...LANGS] : LANGS).forEach(l => {
      const o = document.createElement('option');
      o.value = l; o.textContent = l;
      sel.appendChild(o);
    });
  });

  FIELDS.forEach(id => { $(id).value = cfg[id]; });

  presetSel.addEventListener('change', () => {
    const p = PRESETS[presetSel.value];
    if (!p) return;
    $('apiType').value = p.apiType;
    $('baseURL').value = p.baseURL;
    $('model').value = p.model;
    markDirty();
  });

  $('eyeBtn').addEventListener('click', () => {
    const inp = $('apiKey');
    inp.type = inp.type === 'password' ? 'text' : 'password';
  });

  FIELDS.forEach(id => $(id).addEventListener('input', markDirty));

  $('saveBtn').addEventListener('click', save);
  $('testBtn').addEventListener('click', testConnection);

  // 侧边栏高亮
  const links = document.querySelectorAll('.side nav a');
  const observer = new IntersectionObserver(entries => {
    entries.forEach(e => {
      if (e.isIntersecting) {
        links.forEach(l => l.classList.toggle('active', l.hash === '#' + e.target.id));
      }
    });
  }, { rootMargin: '-30% 0px -60% 0px' });
  document.querySelectorAll('main section').forEach(s => observer.observe(s));
}

function markDirty() {
  dirty = true;
  $('saveHint').textContent = '有未保存的修改';
  $('savebar').classList.add('show');
}

async function save() {
  const data = {};
  FIELDS.forEach(id => {
    data[id] = $(id).type === 'number' ? parseFloat($(id).value) || 0 : $(id).value.trim ? $(id).value.trim() : $(id).value;
  });
  data.temperature = Math.min(1, Math.max(0, data.temperature));
  data.fontSize = Math.min(22, Math.max(12, Math.round(data.fontSize)));
  await chrome.storage.sync.set(data);
  dirty = false;
  $('saveHint').textContent = '✓ 已保存';
  $('savebar').classList.add('show');
  setTimeout(() => { if (!dirty) $('savebar').classList.remove('show'); }, 2000);
}

async function testConnection() {
  const btn = $('testBtn'), out = $('testResult');
  btn.disabled = true;
  out.className = 'test-result';
  out.textContent = '连接中…';

  const cfg = {};
  FIELDS.forEach(id => cfg[id] = $(id).value.trim ? $(id).value.trim() : $(id).value);
  const base = cfg.baseURL.replace(/\/+$/, '');
  const prompt = `请把这句话翻译成${cfg.targetLang}：Hello world`;

  try {
    let url, headers, body;
    if (cfg.apiType === 'anthropic') {
      url = `${base}/v1/messages`;
      headers = { 'content-type': 'application/json', 'x-api-key': cfg.apiKey, 'anthropic-version': '2023-06-01' };
      body = JSON.stringify({ model: cfg.model, max_tokens: 100, messages: [{ role: 'user', content: prompt }] });
    } else if (cfg.apiType === 'gemini') {
      url = `${base}/v1beta/models/${encodeURIComponent(cfg.model)}:generateContent`;
      headers = { 'content-type': 'application/json', 'x-goog-api-key': cfg.apiKey };
      body = JSON.stringify({ contents: [{ role: 'user', parts: [{ text: prompt }] }] });
    } else {
      url = `${base}/chat/completions`;
      headers = { 'content-type': 'application/json', authorization: `Bearer ${cfg.apiKey}` };
      body = JSON.stringify({ model: cfg.model, max_tokens: 100, messages: [{ role: 'user', content: prompt }] });
    }

    const resp = await fetch(url, { method: 'POST', headers, body });
    const json = await resp.json().catch(() => ({}));

    if (!resp.ok) {
      throw new Error(json.error?.message || json.message || `HTTP ${resp.status}`);
    }
    const reply = cfg.apiType === 'anthropic' ? json.content?.[0]?.text
      : cfg.apiType === 'gemini' ? json.candidates?.[0]?.content?.parts?.[0]?.text
      : json.choices?.[0]?.message?.content;

    if (!reply) throw new Error('未解析到回复，请检查模型名');
    if (dirty) await save();
    out.className = 'test-result ok';
    out.textContent = `✓ 连接成功：${String(reply).trim().slice(0, 50)}`;
  } catch (err) {
    out.className = 'test-result err';
    out.textContent = '✗ ' + (err.message || err);
  } finally {
    btn.disabled = false;
  }
}

init();