/* DCTS Dashboard Toast Component */

import { ICONS } from '../utils/icons.js';

const TOAST_ICONS = {
  success: ICONS.checkCircle({ cls: 'toast-icon', sw: 2.5 }),
  error: ICONS.alert({ cls: 'toast-icon', sw: 2.5 }),
  info: ICONS.info({ cls: 'toast-icon', sw: 2.5 }),
};

export function showToast(message, type = 'info') {
  const container = document.getElementById('toast-container');
  if (!container) {
    console.log(`[Toast ${type}]`, message);
    return;
  }
  const toast = document.createElement('div');
  toast.className = `toast toast-${type}`;
  // role="alert" 隐含 assertive，仅用于错误；普通提示用 polite，避免与 role 冲突
  if (type === 'error') {
    toast.setAttribute('role', 'alert');
  } else {
    toast.setAttribute('role', 'status');
    toast.setAttribute('aria-live', 'polite');
  }

  // 消息一律走 textContent，杜绝 innerHTML 注入（message 可能携带用户输入，如工作流名）
  const iconSvg = TOAST_ICONS[type] || TOAST_ICONS.info;
  toast.innerHTML = iconSvg;
  const textEl = document.createElement('span');
  textEl.textContent = message;
  toast.appendChild(textEl);

  // 关闭按钮：键盘可达（Tab 聚焦 + Enter/Space 触发），aria-label 供读屏播报。
  // 此前仅支持点击关闭，键盘/读屏用户无法主动消除（尤其 role=alert 的错误提示）。
  const closeBtn = document.createElement('button');
  closeBtn.type = 'button';
  closeBtn.className = 'toast-close';
  closeBtn.setAttribute('aria-label', '关闭提示');
  closeBtn.innerHTML = ICONS.x({ size: 14, sw: 2.2 });
  toast.appendChild(closeBtn);

  let dismissed = false;
  const dismiss = () => {
    if (dismissed) return;
    dismissed = true;
    toast.classList.add('toast-fadeOut');
    setTimeout(() => toast.remove(), 250);
  };

  closeBtn.addEventListener('click', (e) => {
    e.stopPropagation();
    dismiss();
  });
  toast.addEventListener('click', dismiss);
  container.appendChild(toast);

  setTimeout(dismiss, 3500);
}