/**
 * 多端顶部导航与安全区自适应计算模块
 * 彻底解决微信小程序动态胶囊、iPhone灵动岛、刘海屏与系统状态栏遮挡重叠问题
 */

export function getNavBarInfo() {
  let statusBarHeight = 44;
  let navBarHeight = 44;
  let capsuleTop = 48;
  let capsuleHeight = 32;
  let capsuleRightSpace = 0;
  let safeHeaderGap = 20; // 默认 H5 顶部留白 (px)
  let totalHeaderHeight = 88;
  let capsuleBottom = 80;

  // #ifdef H5
  safeHeaderGap = 16;
  capsuleRightSpace = 0;
  totalHeaderHeight = 44;
  capsuleBottom = 20;
  // #endif

  // #ifdef MP-WEIXIN
  try {
    let windowInfo = {};
    if (typeof uni !== 'undefined' && typeof uni.getWindowInfo === 'function') {
      windowInfo = uni.getWindowInfo();
    } else if (typeof wx !== 'undefined' && typeof wx.getWindowInfo === 'function') {
      windowInfo = wx.getWindowInfo();
    } else if (typeof uni !== 'undefined' && typeof uni.getSystemInfoSync === 'function') {
      windowInfo = uni.getSystemInfoSync();
    }
    statusBarHeight = windowInfo.statusBarHeight || 44;

    let menuButton = null;
    if (uni.getMenuButtonBoundingClientRect) {
      menuButton = uni.getMenuButtonBoundingClientRect();
    }

    if (menuButton && menuButton.top && menuButton.height) {
      capsuleTop = menuButton.top;
      capsuleHeight = menuButton.height;
      capsuleBottom = menuButton.bottom;
      const margin = Math.max(0, menuButton.top - statusBarHeight);
      navBarHeight = menuButton.height + margin * 2;
      const screenWidth = windowInfo.screenWidth || 375;
      // 胶囊避让右边距：屏幕最右侧到胶囊左边缘的距离 + 8px 缓冲
      capsuleRightSpace = (screenWidth - menuButton.left) + 8;
      // 搜索栏等单行导航条精准对齐胶囊 top 坐标
      safeHeaderGap = menuButton.top;
      // 整个导航栏底部总安全距离
      totalHeaderHeight = menuButton.bottom + 10;
    } else {
      safeHeaderGap = statusBarHeight + 6;
      capsuleHeight = 32;
      capsuleBottom = safeHeaderGap + capsuleHeight;
      capsuleRightSpace = 96;
      totalHeaderHeight = statusBarHeight + 44;
    }
  } catch (e) {
    safeHeaderGap = 54;
    capsuleHeight = 32;
    capsuleBottom = 86;
    capsuleRightSpace = 96;
    totalHeaderHeight = 90;
  }
  // #endif

  return {
    statusBarHeight,
    navBarHeight,
    capsuleTop,
    capsuleHeight,
    capsuleBottom,
    capsuleRightSpace,
    safeHeaderGap,
    totalHeaderHeight,
    capsuleBelowGap: capsuleBottom + 10,
    headerGapPx: `${safeHeaderGap}px`,
    capsuleSpacePx: `${capsuleRightSpace}px`,
    capsuleHeightPx: `${capsuleHeight}px`,
    capsuleBottomPx: `${capsuleBottom}px`,
    capsuleBelowGapPx: `${capsuleBottom + 10}px`,
    totalHeaderHeightPx: `${totalHeaderHeight}px`
  };
}