// ============================================================
// DNF90 GM 工具 — API 客户端与通用工具
// ============================================================

const API = {
  async request(method, path, body) {
    const opts = { method, headers: {} };
    if (body !== undefined) {
      opts.headers['Content-Type'] = 'application/json';
      opts.body = JSON.stringify(body);
    }
    const res = await fetch(path, opts);
    let data;
    try { data = await res.json(); }
    catch (e) { data = { ok: false, error: '响应解析失败' }; }
    if (!res.ok || data.ok === false) {
      const err = new Error(data.error || `请求失败 (${res.status})`);
      err.data = data;
      throw err;
    }
    return data.data;
  },
  get(path) { return this.request('GET', path); },
  post(path, body) { return this.request('POST', path, body ?? {}); },
};

// ---------- Toast ----------
function toast(msg, type = 'info', ms = 3200) {
  let wrap = document.querySelector('.toast-wrap');
  if (!wrap) {
    wrap = document.createElement('div');
    wrap.className = 'toast-wrap';
    document.body.appendChild(wrap);
  }
  const el = document.createElement('div');
  el.className = 'toast ' + type;
  const icon = type === 'ok' ? '✓' : type === 'err' ? '✕' : 'ℹ';
  el.innerHTML = `<span style="font-weight:700">${icon}</span><span>${escapeHtml(msg)}</span>`;
  wrap.appendChild(el);
  setTimeout(() => {
    el.style.transition = 'opacity 0.3s, transform 0.3s';
    el.style.opacity = '0';
    el.style.transform = 'translateX(30px)';
    setTimeout(() => el.remove(), 300);
  }, ms);
}

function escapeHtml(s) {
  if (s === null || s === undefined) return '';
  return String(s).replace(/[&<>"']/g, c => ({
    '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;', "'": '&#39;'
  }[c]));
}

function fmt(n) {
  if (n === null || n === undefined || n === '') return '—';
  const num = Number(n);
  if (isNaN(num)) return String(n);
  return num.toLocaleString('zh-CN');
}

function rarityColor(r) { return `rarity-${r}`; }
function rarityName(r) {
  const names = ['普通', '高级', '稀有', '神器', '传说', '史诗', '神话'];
  return names[r] || '未知';
}

// ---------- Modal ----------
function openModal({ title, body, foot, wide = false }) {
  const mask = document.createElement('div');
  mask.className = 'modal-mask';
  mask.innerHTML = `
    <div class="modal ${wide ? 'wide' : ''}">
      <div class="modal-head">
        <span>${escapeHtml(title)}</span>
        <button class="close" data-close>×</button>
      </div>
      <div class="modal-body"></div>
      <div class="modal-foot"></div>
    </div>`;
  const modal = mask.querySelector('.modal');
  const bodyEl = mask.querySelector('.modal-body');
  const footEl = mask.querySelector('.modal-foot');
  if (typeof body === 'string') bodyEl.innerHTML = body;
  else if (body) bodyEl.appendChild(body);
  if (typeof foot === 'string') footEl.innerHTML = foot;
  else if (foot) footEl.appendChild(foot);

  const close = () => mask.remove();
  mask.addEventListener('click', e => { if (e.target === mask) close(); });
  mask.querySelector('[data-close]').addEventListener('click', close);
  document.body.appendChild(mask);
  return { mask, modal, bodyEl, footEl, close };
}

// ---------- Loading ----------
function loadingHtml(text = '加载中…') {
  return `<div class="loading"><div class="spinner"></div><div>${escapeHtml(text)}</div></div>`;
}

// 连接状态
let CONN = { connected: false, base_url: '' };

function updateConnDot() {
  const dots = document.querySelectorAll('.conn-dot');
  dots.forEach(d => {
    d.className = 'conn-dot ' + (CONN.connected ? 'on' : 'off');
  });
  const txt = document.querySelector('.conn-text');
  if (txt) txt.textContent = CONN.connected
    ? `已连接 ${CONN.base_url || ''}`
    : '未连接服务端';
}