/**
 * 隐私政策页面 - 动态展示访客信息
 * 使用腾讯地图IP定位API + ipapi.co获取网络信息
 * 使用navigator.userAgent解析设备信息
 */
(function () {
	'use strict';

	const CONFIG = {
		TENCENT_KEY: 'FXNBZ-T5DCB-ABWUU-NXPTT-4AXGH-IUBAQ',
		CACHE_KEY: 'privacy_ip_cache',
		CACHE_TTL: 1000 * 60 * 60, // 1小时
	};

	// ========== 页面检测 ==========
	function isPrivacyPage() {
		const p = window.location.pathname;
		return p === '/privacy/' || p === '/privacy' || p === '/privacy/index.html';
	}

	// ========== 缓存 ==========
	function getFromCache() {
		try {
			const raw = localStorage.getItem(CONFIG.CACHE_KEY);
			if (!raw) return null;
			const { data, ts } = JSON.parse(raw);
			if (Date.now() - ts > CONFIG.CACHE_TTL) {
				localStorage.removeItem(CONFIG.CACHE_KEY);
				return null;
			}
			return data;
		} catch {
			return null;
		}
	}

	function setCache(data) {
		try {
			localStorage.setItem(CONFIG.CACHE_KEY, JSON.stringify({ data, ts: Date.now() }));
		} catch { /* quota exceeded, ignore */ }
	}

	// ========== 腾讯地图IP定位 (JSONP) ==========
	function fetchTencentIP() {
		return new Promise((resolve, reject) => {
			const cb = `_privacy_qqmap_${Date.now()}`;
			const script = document.createElement('script');
			script.src = `https://apis.map.qq.com/ws/location/v1/ip?key=${encodeURIComponent(CONFIG.TENCENT_KEY)}&output=jsonp&callback=${cb}`;

			window[cb] = (res) => {
				cleanup();
				if (res.status !== 0) return reject(new Error(res.message));
				const { ad_info } = res.result;
				resolve({
					ip: res.result.ip || '',
					country: ad_info.nation || '',
					province: ad_info.province || '',
					city: ad_info.city || '',
				});
			};

			script.onerror = () => { cleanup(); reject(new Error('JSONP request failed')); };

			function cleanup() {
				document.head.removeChild(script);
				delete window[cb];
			}

			document.head.appendChild(script);
		});
	}

	// ========== 运营商检测 (ipapi.co, HTTPS) ==========
	function fetchISP() {
		return fetch('https://ipapi.co/json/')
			.then(r => r.json())
			.then(d => d.org || '获取失败');
	}

	// ========== UA解析 ==========
	function parseUserAgent() {
		const ua = navigator.userAgent;
		return { os: detectOS(ua), browser: detectBrowser(ua) };
	}

	function detectOS(ua) {
		if (/Windows NT 10\.0/.test(ua)) return 'Windows 10/11';
		if (/Windows NT 6\.3/.test(ua)) return 'Windows 8.1';
		if (/Windows NT 6\.2/.test(ua)) return 'Windows 8';
		if (/Windows NT 6\.1/.test(ua)) return 'Windows 7';
		if (/Windows/.test(ua)) return 'Windows';

		const macMatch = ua.match(/Mac OS X ([\d_]+)/);
		if (macMatch) return 'macOS ' + macMatch[1].replace(/_/g, '.');

		const androidMatch = ua.match(/Android ([\d.]+)/);
		if (androidMatch) return 'Android ' + androidMatch[1];

		const iosMatch = ua.match(/OS ([\d_]+)/);
		if (/iPhone|iPad|iPod/.test(ua) && iosMatch) return 'iOS ' + iosMatch[1].replace(/_/g, '.');

		if (/Linux/.test(ua)) return 'Linux';
		return '未知';
	}

	function detectBrowser(ua) {
		if (/Edg\//.test(ua)) return 'Edge ' + (ua.match(/Edg\/([\d.]+)/) || [])[1];
		if (/OPR\//.test(ua)) return 'Opera ' + (ua.match(/OPR\/([\d.]+)/) || [])[1];
		if (/Chrome\//.test(ua)) return 'Chrome ' + (ua.match(/Chrome\/([\d.]+)/) || [])[1];
		if (/Firefox\//.test(ua)) return 'Firefox ' + (ua.match(/Firefox\/([\d.]+)/) || [])[1];
		if (/Safari\//.test(ua)) return 'Safari ' + (ua.match(/Version\/([\d.]+)/) || [])[1];
		return '未知';
	}

	// ========== 表格操作 ==========
	function findPrivacyTable() {
		const tables = document.querySelectorAll('#article-container table');
		for (const table of tables) {
			const rows = table.querySelectorAll('tbody tr');
			for (const row of rows) {
				const firstCell = row.querySelector('td:first-child');
				if (firstCell && firstCell.textContent.trim() === 'IP地址') {
					return table;
				}
			}
		}
		return null;
	}

	function getCellByLabel(table, label) {
		const rows = table.querySelectorAll('tbody tr');
		for (const row of rows) {
			const firstCell = row.querySelector('td:first-child');
			if (firstCell && firstCell.textContent.trim() === label) {
				return row.querySelector('td:nth-child(2)');
			}
		}
		return null;
	}

	function fillCell(table, label, value) {
		const cell = getCellByLabel(table, label);
		if (!cell) return;
		cell.classList.remove('privacy-cell-loading');
		cell.textContent = value || '获取失败';
	}

	function addLoadingClass(table) {
		const labels = ['IP地址', '国家', '省份', '城市', '运营商', '操作系统', '浏览器'];
		labels.forEach(label => {
			const cell = getCellByLabel(table, label);
			if (cell) cell.classList.add('privacy-cell-loading');
		});
	}

	// ========== 主逻辑 ==========
	function init() {
		if (!isPrivacyPage()) return;

		const table = findPrivacyTable();
		if (!table) return;

		addLoadingClass(table);

		const cached = getFromCache();
		if (cached) {
			fillAll(table, cached);
			return;
		}

		// 并行获取数据
		Promise.allSettled([fetchTencentIP(), fetchISP()]).then(([tencentRes, ispRes]) => {
			const tencent = tencentRes.status === 'fulfilled' ? tencentRes.value : {};
			const isp = ispRes.status === 'fulfilled' ? ispRes.value : '获取失败';
			const ua = parseUserAgent();

			const data = {
				ip: tencent.ip || '获取失败',
				country: tencent.country || '获取失败',
				province: tencent.province || '获取失败',
				city: tencent.city || '获取失败',
				isp: isp,
				os: ua.os,
				browser: ua.browser,
			};

			fillAll(table, data);
			setCache(data);
		});
	}

	function fillAll(table, data) {
		fillCell(table, 'IP地址', data.ip);
		fillCell(table, '国家', data.country);
		fillCell(table, '省份', data.province);
		fillCell(table, '城市', data.city);
		fillCell(table, '运营商', data.isp);
		fillCell(table, '操作系统', data.os);
		fillCell(table, '浏览器', data.browser);
	}

	// ========== 初始化（含Pjax兼容） ==========
	function safeInit() {
		// 延迟执行，等待主题的 addTableWrap() 完成
		setTimeout(init, 100);
	}

	document.addEventListener('DOMContentLoaded', safeInit);
	document.addEventListener('pjax:complete', safeInit);
})();