import os
import time
import psutil
import logging
import subprocess
from typing import Optional, Tuple


class ODMProcessMonitor:
    """ODM进程监控器"""

    def __init__(self, max_retries: int = 3, check_interval: int = 10, mode: str = "快拼模式"):
        """
        初始化监控器

        Args:
            max_retries: 最大重试次数
            check_interval: 检查间隔（秒）
            mode: 模式
        """
        self.max_retries = max_retries
        self.check_interval = check_interval
        self.logger = logging.getLogger('UAV_Preprocess.ODMMonitor')
        self.mode = mode

    def _check_docker_container(self, process_name: str = "opendronemap/odm") -> bool:
        """检查是否有指定的Docker容器在运行"""
        try:
            result = subprocess.run(
                ["docker", "ps", "--filter",
                    f"ancestor={process_name}", "--format", "{{.ID}}"],
                capture_output=True,
                text=True
            )
            return bool(result.stdout.strip())
        except Exception as e:
            self.logger.error(f"检查Docker容器状态时发生错误: {str(e)}")
            return False

    def _check_success(self, grid_dir: str) -> bool:
        """检查ODM是否执行成功"""
        if self.mode == "快拼模式":
            success_markers = ['odm_orthophoto', 'odm_georeferencing']
        else:
            success_markers = ['odm_orthophoto',
                               'odm_georeferencing', 'odm_texturing']
        return all(os.path.exists(os.path.join(grid_dir, 'project', marker)) for marker in success_markers)

    def run_odm_with_monitor(self, command: str, grid_dir: str, grid_idx: int) -> Tuple[bool, str]:
        """运行ODM命令并监控进程"""
        attempt = 0
        while attempt < self.max_retries:
            try:
                self.logger.info(f"网格 {grid_idx + 1} 第 {attempt + 1} 次尝试执行ODM")
                
                # 创建日志文件
                log_file = os.path.join(grid_dir, f'odm_attempt_{attempt + 1}.log')
                
                # 使用 subprocess.Popen 启动进程，并设置适当的参数
                process = subprocess.Popen(
                    command,
                    shell=True,
                    stdout=subprocess.PIPE,
                    stderr=subprocess.PIPE,
                    bufsize=1,  # 使用行缓冲
                    text=True,  # 使用文本模式
                    universal_newlines=True  # 统一换行符处理
                )
                
                # 使用非阻塞方式读取输出
                while True:
                    # 读取输出
                    output = process.stdout.readline()
                    if output:
                        with open(log_file, 'a', encoding='utf-8') as f:
                            f.write(output)
                        self.logger.info(f"网格 {grid_idx + 1}: {output.strip()}")
                    
                    # 检查进程是否结束
                    if process.poll() is not None:
                        break
                    
                    # 检查Docker容器状态
                    if not self._check_docker_container():
                        break
                    
                    time.sleep(0.1)  # 短暂休眠，避免CPU过度使用
                
                # 获取最终返回码
                return_code = process.wait()
                
                # 检查是否成功完成
                if return_code == 0 and self._check_success(grid_dir):
                    self.logger.info(f"网格 {grid_idx + 1} ODM处理成功")
                    return True, ""
                    
                self.logger.warning(f"网格 {grid_idx + 1} 第 {attempt + 1} 次尝试失败")
                
            except Exception as e:
                error_msg = f"监控进程发生异常: {str(e)}"
                self.logger.error(error_msg)
                return False, error_msg
            
            attempt += 1
            if attempt < self.max_retries:
                wait_time = (attempt + 1) * 30
                self.logger.info(f"等待 {wait_time} 秒后重试...")
                time.sleep(wait_time)
        
        error_msg = f"网格 {grid_idx + 1} 在 {self.max_retries} 次尝试后仍然失败"
        self.logger.error(error_msg)
        return False, error_msg