/**
 * ============================================================
 * 环境检测器 - uni-app 适配版
 * 支持：H5、微信小程序、支付宝小程序、百度小程序、抖音小程序、App
 * ============================================================
 *
 * 原始版本基于 navigator.userAgent（H5 专用）
 * 本版本通过 uni-app 条件编译适配多端
 *
 * 【用法】
 * import { getEnvironment, detect, isWechat, isBrowser, ... } from '@/utils/env.js';
 *
 * const env = getEnvironment();
 * if (env.isBrowser) { ... }
 * if (env.isWechatWebview) { ... }
 * ============================================================
 */

/* ========== H5 平台：原始 UA 检测 ========== */
// #ifdef H5
const UA = (navigator.userAgent || '').toLowerCase();

function _isWechatMiniProgram() {
	if (window.__wxjs_environment === 'miniprogram') return true;
	if (/miniprogram/.test(UA)) return true;
	return false;
}

function _isWechatH5() {
	if (!/micromessenger/.test(UA)) return false;
	if (_isWechatMiniProgram()) return false;
	return true;
}

function _isWechat() {
	return /micromessenger/.test(UA);
}

function _isAppWebview() {
	const patterns = [
		/aliapp\(tb/i,
		/aliapp\(tm/i,
		/jdapp/i,
		/aweme/i,
		/ksnc/i,
		/weibo/i,
		/dingtalk/i,
		/alipayclient/i,
		/baiduboxapp/i,
		/qq\//i,
	];
	return patterns.some(function (re) { return re.test(UA); });
}

function _isAppNative() {
	if (typeof window.TBJS !== 'undefined') return true;
	if (typeof window.AlipayJSBridge !== 'undefined') return true;
	if (typeof window.dd !== 'undefined') return true;
	if (typeof window.toutiao !== 'undefined') return true;
	if (typeof window.JDBridge !== 'undefined') return true;
	return false;
}

function _isBrowser() {
	if (_isWechat()) return false;
	if (_isAppWebview()) return false;
	if (_isAppNative()) return false;
	return /safari|chrome|crios|firefox|fxios|edge|edg|opr/.test(UA);
}

function _isMobile() {
	return /iphone|ipad|ipod|android/.test(UA);
}

function _getAppName() {
	var map = [
		{ name: 'taobao', regex: /aliapp\(tb/i },
		{ name: 'tmall', regex: /aliapp\(tm/i },
		{ name: 'jd', regex: /jdapp/i },
		{ name: 'douyin', regex: /aweme/i },
		{ name: 'kuaishou', regex: /ksnc/i },
		{ name: 'weibo', regex: /weibo/i },
		{ name: 'dingtalk', regex: /dingtalk/i },
		{ name: 'alipay', regex: /alipayclient/i },
		{ name: 'baidu', regex: /baiduboxapp/i },
		{ name: 'qq', regex: /qq\//i },
	];
	for (var i = 0; i < map.length; i++) {
		if (map[i].regex.test(UA)) return map[i].name;
	}
	return null;
}

function _detect() {
	if (_isWechatMiniProgram()) return 'wechat-miniprogram';
	if (_isWechatH5()) return 'wechat-h5';
	if (_isAppNative()) return 'app-native';
	if (_isAppWebview()) return 'app-webview';
	if (_isBrowser()) return _isMobile() ? 'mobile-browser' : 'pc-browser';
	return 'unknown';
}

function _getEnvironment() {
	var wechat = _isWechat();
	var wechatMini = _isWechatMiniProgram();
	var wechatH5Env = _isWechatH5();
	var appWebview = _isAppWebview();
	var appNative = _isAppNative();
	var browser = _isBrowser();

	return {
		isApp: appNative,
		isWechat: wechat,
		isWechatH5: wechatH5Env,
		isBrowser: browser,
		isWechatWebview: wechatH5Env || wechatMini,
		isAppWebview: appWebview,
		isWechatMiniProgram: wechatMini,
		isAppNative: appNative,
		appName: _getAppName(),
		isMobile: _isMobile(),
		env: _detect()
	};
}
// #endif

/* ========== 微信小程序 ========== */
// #ifdef MP-WEIXIN
function _getEnvironment() {
	return {
		isApp: false,
		isWechat: true,
		isWechatH5: false,
		isBrowser: false,
		isWechatWebview: true,
		isAppWebview: false,
		isWechatMiniProgram: true,
		isAppNative: false,
		appName: null,
		isMobile: true,
		env: 'wechat-miniprogram'
	};
}
function _detect() { return 'wechat-miniprogram'; }
function _isWechatMiniProgram() { return true; }
function _isWechatH5() { return false; }
function _isWechat() { return true; }
function _isWechatWebview() { return true; }
function _isAppWebview() { return false; }
function _isAppNative() { return false; }
function _isBrowser() { return false; }
function _isMobile() { return true; }
function _getAppName() { return null; }
// #endif

/* ========== App 平台 ========== */
// #ifdef APP-PLUS
function _getEnvironment() {
	return {
		isApp: false,
		isWechat: false,
		isWechatH5: false,
		isBrowser: false,
		isWechatWebview: false,
		isAppWebview: true,
		isWechatMiniProgram: false,
		isAppNative: false,
		appName: null,
		isMobile: true,
		env: 'app-webview'
	};
}
function _detect() { return 'app-webview'; }
function _isWechatMiniProgram() { return false; }
function _isWechatH5() { return false; }
function _isWechat() { return false; }
function _isWechatWebview() { return false; }
function _isAppWebview() { return true; }
function _isAppNative() { return false; }
function _isBrowser() { return false; }
function _isMobile() { return true; }
function _getAppName() { return null; }
// #endif

/* ========== 其他小程序平台（支付宝、百度、抖音等） ========== */
// #ifndef H5 || MP-WEIXIN || APP-PLUS
function _getEnvironment() {
	return {
		isApp: false,
		isWechat: false,
		isWechatH5: false,
		isBrowser: false,
		isWechatWebview: false,
		isAppWebview: false,
		isWechatMiniProgram: false,
		isAppNative: false,
		appName: null,
		isMobile: true,
		env: 'unknown'
	};
}
function _detect() { return 'unknown'; }
function _isWechatMiniProgram() { return false; }
function _isWechatH5() { return false; }
function _isWechat() { return false; }
function _isWechatWebview() { return false; }
function _isAppWebview() { return false; }
function _isAppNative() { return false; }
function _isBrowser() { return false; }
function _isMobile() { return true; }
function _getAppName() { return null; }
// #endif

/* ========== 统一暴露接口 ========== */
export function getEnvironment() {
	return _getEnvironment();
}

export function detect() {
	return _detect();
}

export function isWechatMiniProgram() {
	return _isWechatMiniProgram();
}

export function isWechatH5() {
	return _isWechatH5();
}

export function isWechat() {
	return _isWechat();
}

export function isWechatWebview() {
	return _isWechatWebview();
}

export function isAppWebview() {
	return _isAppWebview();
}

export function isAppNative() {
	return _isAppNative();
}

export function isBrowser() {
	return _isBrowser();
}

export function isMobile() {
	return _isMobile();
}

export function getAppName() {
	return _getAppName();
}

export default {
	getEnvironment,
	detect,
	isWechatMiniProgram,
	isWechatH5,
	isWechat,
	isWechatWebview,
	isAppWebview,
	isAppNative,
	isBrowser,
	isMobile,
	getAppName
};