// 股票数据展示系统前端应用
class StockDataApp {
	constructor() {
		this.currentPage = 1;
		this.pageSize = 20;
		this.currentStock = null;
		this.klineChart = null;
		this.init();
	}

	// 初始化应用
	async init() {
		this.setupEventListeners();
		await this.loadSystemOverview();
		await this.loadStockData();
		this.setupNavigation();
	}

	// 设置事件监听器
	setupEventListeners() {
		// 搜索功能
		const searchInput = document.getElementById('stock-search');
		const searchBtn = document.getElementById('search-btn');
		
		searchBtn.addEventListener('click', () => this.searchStocks());
		searchInput.addEventListener('keypress', (e) => {
			if (e.key === 'Enter') this.searchStocks();
		});

		// 股票选择器
		const stockSelector = document.getElementById('stock-selector');
		stockSelector.addEventListener('change', (e) => {
			this.currentStock = e.target.value;
			if (this.currentStock) this.loadKlineChart();
		});

		// 周期选择器
		const periodSelector = document.getElementById('period-selector');
		periodSelector.addEventListener('change', () => {
			if (this.currentStock) this.loadKlineChart();
		});

		// 财务数据选择器
		const financialStockSelector = document.getElementById('financial-stock-selector');
		financialStockSelector.addEventListener('change', (e) => {
			if (e.target.value) this.loadFinancialData(e.target.value);
		});

		// 日志刷新
		const refreshLogsBtn = document.getElementById('refresh-logs');
		refreshLogsBtn.addEventListener('click', () => this.loadSystemLogs());

		// 日志过滤器
		const logLevelFilter = document.getElementById('log-level-filter');
		logLevelFilter.addEventListener('change', () => this.loadSystemLogs());

		const logDateFilter = document.getElementById('log-date-filter');
		logDateFilter.addEventListener('change', () => this.loadSystemLogs());
	}

	// 设置导航
	setupNavigation() {
		const navLinks = document.querySelectorAll('.nav-link');
		const sections = document.querySelectorAll('.content-section');

		navLinks.forEach(link => {
			link.addEventListener('click', (e) => {
				e.preventDefault();
				
				// 移除所有激活状态
				navLinks.forEach(l => l.classList.remove('active'));
				sections.forEach(s => s.classList.remove('active'));
				
				// 添加当前激活状态
				link.classList.add('active');
				const targetSection = document.querySelector(link.getAttribute('href'));
				if (targetSection) {
					targetSection.classList.add('active');
					
					// 加载对应数据
					switch(link.getAttribute('href')) {
						case '#kline-chart':
							this.loadKlineChart();
							break;
						case '#financial-data':
							this.loadFinancialData();
							break;
						case '#system-logs':
							this.loadSystemLogs();
							break;
					}
				}
			});
		});
	}

	// 显示加载遮罩
	showLoading() {
		document.getElementById('loading-overlay').classList.add('show');
	}

	// 隐藏加载遮罩
	hideLoading() {
		document.getElementById('loading-overlay').classList.remove('show');
	}

	// 加载系统概览数据
	async loadSystemOverview() {
		try {
			const response = await this.apiCall('/api/system/overview');
			if (response.success) {
				document.getElementById('stock-count').textContent = this.formatNumber(response.stock_count);
				document.getElementById('kline-count').textContent = this.formatNumber(response.kline_count);
				document.getElementById('financial-count').textContent = this.formatNumber(response.financial_count);
				document.getElementById('log-count').textContent = this.formatNumber(response.log_count);
			}
		} catch (error) {
			console.error('加载系统概览失败:', error);
		}
	}

	// 加载股票数据
	async loadStockData(page = 1) {
		try {
			this.showLoading();
			const response = await this.apiCall(`/api/stocks?page=${page}&limit=${this.pageSize}`);
			
			if (response.success) {
				this.renderStockTable(response.data);
				this.setupPagination(response.total, page);
				this.populateStockSelectors(response.data);
			}
		} catch (error) {
			console.error('加载股票数据失败:', error);
			this.showError('加载股票数据失败');
		} finally {
			this.hideLoading();
		}
	}

	// 渲染股票表格
	renderStockTable(stocks) {
		const tbody = document.getElementById('stock-table-body');
		tbody.innerHTML = '';

		stocks.forEach(stock => {
			const row = document.createElement('tr');
			row.innerHTML = `
				<td>${stock.code}</td>
				<td>${stock.name}</td>
				<td>${stock.exchange}</td>
				<td>${this.formatDate(stock.listing_date)}</td>
				<td>${stock.industry || '-'}</td>
				<td>
					<button class="btn btn-primary" onclick="app.viewStockDetails('${stock.code}')">
						查看详情
					</button>
				</td>
			`;
			tbody.appendChild(row);
		});
	}

	// 设置分页
	setupPagination(total, currentPage) {
		const pagination = document.getElementById('stock-pagination');
		const totalPages = Math.ceil(total / this.pageSize);
		
		if (totalPages <= 1) {
			pagination.innerHTML = '';
			return;
		}

		let html = '';
		
		// 上一页按钮
		if (currentPage > 1) {
			html += `<button onclick="app.loadStockData(${currentPage - 1})">上一页</button>`;
		}
		
		// 页码按钮
		for (let i = 1; i <= totalPages; i++) {
			if (i === currentPage) {
				html += `<button class="active">${i}</button>`;
			} else {
				html += `<button onclick="app.loadStockData(${i})">${i}</button>`;
			}
		}
		
		// 下一页按钮
		if (currentPage < totalPages) {
			html += `<button onclick="app.loadStockData(${currentPage + 1})">下一页</button>`;
		}

		pagination.innerHTML = html;
	}

	// 填充股票选择器
	populateStockSelectors(stocks) {
		const selectors = [
			document.getElementById('stock-selector'),
			document.getElementById('financial-stock-selector')
		];

		selectors.forEach(selector => {
			// 清空现有选项（保留第一个选项）
			while (selector.children.length > 1) {
				selector.removeChild(selector.lastChild);
			}

			// 添加股票选项
			stocks.forEach(stock => {
				const option = document.createElement('option');
				option.value = stock.code;
				option.textContent = `${stock.code} - ${stock.name}`;
				selector.appendChild(option);
			});
		});
	}

	// 搜索股票
	async searchStocks() {
		const query = document.getElementById('stock-search').value.trim();
		if (!query) {
			await this.loadStockData();
			return;
		}

		try {
			this.showLoading();
			const response = await this.apiCall(`/api/stocks/search?q=${encodeURIComponent(query)}`);
			
			if (response.success) {
				this.renderStockTable(response.data);
				document.getElementById('stock-pagination').innerHTML = '';
			}
		} catch (error) {
			console.error('搜索股票失败:', error);
			this.showError('搜索股票失败');
		} finally {
			this.hideLoading();
		}
	}

	// 加载K线图表
	async loadKlineChart() {
		if (!this.currentStock) return;

		try {
			this.showLoading();
			const period = document.getElementById('period-selector').value;
			const response = await this.apiCall(`/api/kline/${this.currentStock}?period=${period}`);
			
			if (response.success) {
				this.renderKlineChart(response.data);
			}
		} catch (error) {
			console.error('加载K线数据失败:', error);
			this.showError('加载K线数据失败');
		} finally {
			this.hideLoading();
		}
	}

	// 渲染K线图表
	renderKlineChart(klineData) {
		const ctx = document.getElementById('kline-chart-canvas').getContext('2d');
		
		// 销毁现有图表
		if (this.klineChart) {
			this.klineChart.destroy();
		}

		const dates = klineData.map(item => item.date);
		const prices = klineData.map(item => item.close);

		this.klineChart = new Chart(ctx, {
			type: 'line',
			data: {
				labels: dates,
				datasets: [{
					label: '收盘价',
					data: prices,
					borderColor: '#667eea',
					backgroundColor: 'rgba(102, 126, 234, 0.1)',
					fill: true,
					tension: 0.1
				}]
			},
			options: {
				responsive: true,
				maintainAspectRatio: false,
				plugins: {
					title: {
						display: true,
						text: '股票价格走势图'
					}
				},
				scales: {
					y: {
						beginAtZero: false
					}
				}
			}
		});
	}

	// 加载财务数据
	async loadFinancialData(stockCode = null) {
		try {
			this.showLoading();
			
			if (!stockCode) {
				stockCode = document.getElementById('financial-stock-selector').value;
			}
			
			if (!stockCode) return;

			const period = document.getElementById('report-period').value;
			const year = document.getElementById('report-year').value;
			
			const response = await this.apiCall(`/api/financial/${stockCode}?year=${year}&period=${period}`);
			
			if (response.success) {
				this.renderFinancialTable(response.data);
			}
		} catch (error) {
			console.error('加载财务数据失败:', error);
			this.showError('加载财务数据失败');
		} finally {
			this.hideLoading();
		}
	}

	// 渲染财务数据表格
	renderFinancialTable(financialData) {
		const tbody = document.getElementById('financial-table-body');
		tbody.innerHTML = '';

		if (!financialData || Object.keys(financialData).length === 0) {
			tbody.innerHTML = '<tr><td colspan="4" style="text-align: center;">暂无财务数据</td></tr>';
			return;
		}

		const financialItems = [
			{ key: 'revenue', label: '营业收入', unit: '万元' },
			{ key: 'net_profit', label: '净利润', unit: '万元' },
			{ key: 'total_assets', label: '总资产', unit: '万元' },
			{ key: 'total_liabilities', label: '总负债', unit: '万元' },
			{ key: 'eps', label: '每股收益', unit: '元' },
			{ key: 'roe', label: '净资产收益率', unit: '%' }
		];

		financialItems.forEach(item => {
			if (financialData[item.key] !== undefined) {
				const row = document.createElement('tr');
				row.innerHTML = `
					<td>${item.label}</td>
					<td>${this.formatNumber(financialData[item.key])}</td>
					<td>${item.unit}</td>
					<td>${this.calculateChange(financialData[item.key])}</td>
				`;
				tbody.appendChild(row);
			}
		});
	}

	// 加载系统日志
	async loadSystemLogs() {
		try {
			this.showLoading();
			
			const level = document.getElementById('log-level-filter').value;
			const date = document.getElementById('log-date-filter').value;
			
			let url = '/api/system/logs';
			const params = [];
			
			if (level) params.push(`level=${level}`);
			if (date) params.push(`date=${date}`);
			
			if (params.length > 0) {
				url += '?' + params.join('&');
			}
			
			const response = await this.apiCall(url);
			
			if (response.success) {
				this.renderSystemLogs(response.data);
			}
		} catch (error) {
			console.error('加载系统日志失败:', error);
			this.showError('加载系统日志失败');
		} finally {
			this.hideLoading();
		}
	}

	// 渲染系统日志
	renderSystemLogs(logs) {
		const logList = document.getElementById('log-list');
		logList.innerHTML = '';

		if (!logs || logs.length === 0) {
			logList.innerHTML = '<div class="log-item">暂无系统日志</div>';
			return;
		}

		logs.forEach(log => {
			const logItem = document.createElement('div');
			logItem.className = `log-item ${log.level.toLowerCase()}`;
			
			logItem.innerHTML = `
				<div class="log-header">
					<span class="log-level ${log.level.toLowerCase()}">${log.level}</span>
					<span class="log-time">${this.formatDateTime(log.timestamp)}</span>
				</div>
				<div class="log-message">${log.message}</div>
				<div class="log-details">
					模块: ${log.module_name} | 事件: ${log.event_type}
					${log.exception_type ? ` | 异常: ${log.exception_type}` : ''}
				</div>
			`;
			
			logList.appendChild(logItem);
		});
	}

	// 查看股票详情
	viewStockDetails(stockCode) {
		alert(`查看股票 ${stockCode} 的详细信息`);
		// 这里可以扩展为显示详细模态框
	}

	// API调用封装
	async apiCall(url) {
		// 模拟API调用，实际项目中需要连接到后端API
		return new Promise((resolve) => {
			setTimeout(() => {
				// 模拟数据
				const mockData = this.getMockData(url);
				resolve(mockData);
			}, 500);
		});
	}

	// 获取模拟数据
	getMockData(url) {
		if (url.includes('/api/system/overview')) {
			return {
				success: true,
				stock_count: 12595,
				kline_count: 440,
				financial_count: 50,
				log_count: 4
			};
		}
		
		if (url.includes('/api/stocks')) {
			// 模拟股票数据
			const mockStocks = [
				{ code: '000001', name: '平安银行', exchange: 'SZ', listing_date: '1991-04-03', industry: '银行' },
				{ code: '000002', name: '万科A', exchange: 'SZ', listing_date: '1991-01-29', industry: '房地产' },
				{ code: '600000', name: '浦发银行', exchange: 'SH', listing_date: '1999-11-10', industry: '银行' },
				{ code: '600036', name: '招商银行', exchange: 'SH', listing_date: '2002-04-09', industry: '银行' },
				{ code: '601318', name: '中国平安', exchange: 'SH', listing_date: '2007-03-01', industry: '保险' }
			];
			
			return {
				success: true,
				data: mockStocks,
				total: 12595
			};
		}
		
		if (url.includes('/api/kline/')) {
			// 模拟K线数据
			const dates = [];
			const prices = [];
			const basePrice = 10;
			
			for (let i = 30; i >= 0; i--) {
				const date = new Date();
				date.setDate(date.getDate() - i);
				dates.push(date.toISOString().split('T')[0]);
				
				// 模拟价格波动
				const price = basePrice + Math.random() * 5;
				prices.push({
					date: date.toISOString().split('T')[0],
					open: price - 0.5,
					high: price + 0.8,
					low: price - 0.8,
					close: price,
					volume: Math.floor(Math.random() * 1000000)
				});
			}
			
			return {
				success: true,
				data: prices
			};
		}
		
		if (url.includes('/api/financial/')) {
			// 模拟财务数据
			return {
				success: true,
				data: {
					revenue: 500000,
					net_profit: 80000,
					total_assets: 2000000,
					total_liabilities: 1200000,
					eps: 1.5,
					roe: 15.2
				}
			};
		}
		
		if (url.includes('/api/system/logs')) {
			// 模拟系统日志
			return {
				success: true,
				data: [
					{
						id: 1,
						timestamp: new Date().toISOString(),
						level: 'INFO',
						module_name: 'System',
						event_type: 'STARTUP',
						message: '系统启动成功',
						exception_type: null
					},
					{
						id: 2,
						timestamp: new Date(Date.now() - 3600000).toISOString(),
						level: 'INFO',
						module_name: 'DataCollector',
						event_type: 'DATA_COLLECTION',
						message: '开始采集股票数据',
						exception_type: null
					},
					{
						id: 3,
						timestamp: new Date(Date.now() - 1800000).toISOString(),
						level: 'ERROR',
						module_name: 'Database',
						event_type: 'CONNECTION_ERROR',
						message: '数据库连接失败',
						exception_type: 'ConnectionError'
					},
					{
						id: 4,
						timestamp: new Date(Date.now() - 900000).toISOString(),
						level: 'WARNING',
						module_name: 'DataProcessor',
						event_type: 'DATA_FORMAT',
						message: '数据格式异常，已自动修复',
						exception_type: 'FormatError'
					}
				]
			};
		}
		
		return { success: false, message: 'API endpoint not found' };
	}

	// 工具函数
	formatNumber(num) {
		if (num === null || num === undefined) return '-';
		return new Intl.NumberFormat('zh-CN').format(num);
	}

	formatDate(dateString) {
		if (!dateString) return '-';
		return new Date(dateString).toLocaleDateString('zh-CN');
	}

	formatDateTime(dateString) {
		if (!dateString) return '-';
		return new Date(dateString).toLocaleString('zh-CN');
	}

	calculateChange(value) {
		const change = (Math.random() - 0.5) * 20;
		const sign = change >= 0 ? '+' : '';
		const color = change >= 0 ? '#27ae60' : '#e74c3c';
		return `<span style="color: ${color}">${sign}${change.toFixed(2)}%</span>`;
	}

	showError(message) {
		alert(`错误: ${message}`);
	}
}

// 全局应用实例
const app = new StockDataApp();

// 页面加载完成后初始化
document.addEventListener('DOMContentLoaded', () => {
	console.log('股票数据展示系统已加载');
});