"""
截图管理器 - 用于在非交易时间截取上海证券交易所网站图表
"""
import os
import sys
from datetime import datetime
from loguru import logger


# 使用Selenium替代Playwright
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC


class ScreenshotManager:
    """截图管理器"""
    
    def __init__(self, screenshot_dir: str = "screenshots"):
        """
        初始化截图管理器
        """
        # 确定截图目录的正确路径
        if getattr(sys, 'frozen', False):
            # 打包后的环境
            current_dir = os.path.dirname(sys.executable)
            self.screenshot_dir = os.path.join(current_dir, screenshot_dir)
        else:
            # 开发环境
            self.screenshot_dir = screenshot_dir
        
        self.target_url = "https://www.sse.com.cn/"
        self.chart_xpath_pattern = "//*[@id=\"hq_area\"]"
        
        # 创建截图目录
        os.makedirs(self.screenshot_dir, exist_ok=True)
        
        logger.info(f"截图管理器初始化完成，截图目录: {self.screenshot_dir}")
    
    def capture_chart_screenshot(self) -> str:
        """
        截取上海证券交易所网站图表
        返回截图文件路径，失败时返回空字符串
        """
        try:
            # 配置Chrome选项
            chrome_options = Options()
            chrome_options.add_argument('--headless')
            chrome_options.add_argument('--no-sandbox')
            chrome_options.add_argument('--disable-dev-shm-usage')
            chrome_options.add_argument('--disable-gpu')
            chrome_options.add_argument('--window-size=1920,1080')
            chrome_options.add_argument('user-agent=Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36')
            
            # 创建WebDriver
            logger.info("初始化Chrome WebDriver...")
            driver = webdriver.Chrome(options=chrome_options)
            driver.set_page_load_timeout(60)
            driver.implicitly_wait(30)
            
            # 访问目标网页
            logger.info(f"访问上海证券交易所网站: {self.target_url}")
            driver.get(self.target_url)
            
            # 等待页面加载完成
            logger.info("等待页面加载完成...")
            WebDriverWait(driver, 30).until(
                EC.presence_of_element_located((By.XPATH, "//body"))
            )
            # 额外等待确保数据加载完成
            import time
            time.sleep(5)
            
            # 等待图表元素出现
            logger.info("等待图表元素加载...")
            
            # 使用动态XPath模式查找图表元素
            chart_element = None
            selectors = [
                self.chart_xpath_pattern,  # 主要选择器：highcharts-xxxxxxx-0格式
                "//*[contains(@class, 'highcharts')]",
                "//*[contains(@id, 'highcharts')]",
                "//svg",
                "//canvas",
                "//div[contains(@class, 'chart')]",
                "//div[contains(@class, 'graph')]"
            ]
            
            for selector in selectors:
                try:
                    # 等待选择器出现
                    element = WebDriverWait(driver, 10).until(
                        EC.presence_of_element_located((By.XPATH, selector))
                    )
                    # 检查元素是否可见
                    if element.is_displayed():
                        chart_element = element
                        logger.info(f"找到图表元素: {selector}")
                        break
                except Exception as e:
                    logger.debug(f"选择器错误 {selector}: {e}")
                    continue
            
            # 生成截图文件名
            timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
            
            if not chart_element:
                logger.warning("未找到任何图表元素，尝试截取整个页面")
                # 如果找不到图表元素，截取整个页面
                screenshot_path = os.path.join(self.screenshot_dir, f"sse_page_{timestamp}.png")
                driver.save_screenshot(screenshot_path)
                logger.info(f"截取整个页面: {screenshot_path}")
                driver.quit()
                return screenshot_path
            
            # 检查元素是否可见
            if not chart_element.is_displayed():
                logger.warning("图表元素不可见，尝试滚动到元素位置")
                driver.execute_script("arguments[0].scrollIntoView({behavior: 'smooth', block: 'center', inline: 'center'});", chart_element)
                time.sleep(2)
            
            # 生成截图文件名
            screenshot_path = os.path.join(self.screenshot_dir, f"sse_chart_{timestamp}.png")
            
            # 截取图表元素
            logger.info("开始截取图表元素")
            
            # 直接使用元素进行截图
            chart_element.screenshot(screenshot_path)
            
            logger.info(f"✅ 图表截图完成，保存至: {screenshot_path}")
            
            # 关闭浏览器
            driver.quit()
            
            return screenshot_path
            
        except Exception as e:
            logger.error(f"截图过程中发生错误: {e}")
            import traceback
            traceback.print_exc()
            return ""
    
    def get_latest_screenshot(self) -> str:
        """获取最新的截图文件路径"""
        try:
            if not os.path.exists(self.screenshot_dir):
                return ""
            
            # 获取所有截图文件
            screenshot_files = []
            for file in os.listdir(self.screenshot_dir):
                if file.startswith("sse_chart_") and file.endswith(".png"):
                    file_path = os.path.join(self.screenshot_dir, file)
                    screenshot_files.append((file_path, os.path.getmtime(file_path)))
            
            if not screenshot_files:
                return ""
            
            # 按修改时间排序，获取最新的文件
            screenshot_files.sort(key=lambda x: x[1], reverse=True)
            return screenshot_files[0][0]
            
        except Exception as e:
            logger.error(f"获取最新截图失败: {e}")
            return ""
    
    def cleanup_old_screenshots(self, keep_count: int = 10):
        """清理旧的截图文件，只保留最新的几个"""
        try:
            if not os.path.exists(self.screenshot_dir):
                return
            
            # 获取所有截图文件
            screenshot_files = []
            for file in os.listdir(self.screenshot_dir):
                if file.startswith("sse_chart_") and file.endswith(".png"):
                    file_path = os.path.join(self.screenshot_dir, file)
                    screenshot_files.append((file_path, os.path.getmtime(file_path)))
            
            if len(screenshot_files) <= keep_count:
                return
            
            # 按修改时间排序，删除旧的文件
            screenshot_files.sort(key=lambda x: x[1])
            files_to_delete = screenshot_files[:-keep_count]
            
            for file_path, _ in files_to_delete:
                try:
                    os.remove(file_path)
                    logger.info(f"删除旧截图: {file_path}")
                except Exception as e:
                    logger.error(f"删除截图文件失败 {file_path}: {e}")
                    
        except Exception as e:
            logger.error(f"清理旧截图失败: {e}")