#!/usr/bin/env python3
import os
import sys
import time
import logging
import random
import threading
import signal
import argparse
from config.config import current_config as config

# 确保环境变量设置为启用模拟
os.environ['ENABLE_SIMULATION'] = 'True'

# 设置日志
config.setup_logging()
logger = logging.getLogger(__name__)


class DroneSimulator:
    """无人机模拟器"""
    
    def __init__(self, port=14550):
        """初始化模拟器"""
        self.port = port
        self.running = False
        self.thread = None
        self.latitude = config.BASE_LATITUDE
        self.longitude = config.BASE_LONGITUDE
        self.altitude = 0.0
        self.battery = 100.0
        self.armed = False
        self.mode = "GUIDED"
        
    def start(self):
        """启动模拟器"""
        if self.running:
            return
            
        self.running = True
        self.thread = threading.Thread(target=self._simulation_loop, daemon=True)
        self.thread.start()
        logger.info(f"模拟器已启动在端口 {self.port}")
        
    def stop(self):
        """停止模拟器"""
        if not self.running:
            return
            
        self.running = False
        if self.thread:
            self.thread.join(timeout=2)
        logger.info("模拟器已停止")
        
    def _simulation_loop(self):
        """模拟循环"""
        while self.running:
            # 模拟电池消耗
            if self.armed and self.battery > 0:
                self.battery -= 0.01
                if self.battery < 0:
                    self.battery = 0
                    
            # 模拟位置变化
            if self.armed and self.mode == "GUIDED" and self.altitude > 0:
                # 随机漂移
                self.latitude += random.uniform(-0.00001, 0.00001)
                self.longitude += random.uniform(-0.00001, 0.00001)
                
            time.sleep(0.1)
            
    def arm(self):
        """解锁无人机"""
        self.armed = True
        logger.info("模拟无人机已解锁")
        
    def disarm(self):
        """锁定无人机"""
        self.armed = False
        logger.info("模拟无人机已锁定")
        
    def set_mode(self, mode):
        """设置模式"""
        self.mode = mode
        logger.info(f"模拟无人机模式已设置为 {mode}")
        
    def takeoff(self, altitude):
        """起飞"""
        self.arm()
        self.altitude = altitude
        logger.info(f"模拟无人机起飞到高度 {altitude}m")
        
    def land(self):
        """降落"""
        self.altitude = 0
        self.disarm()
        logger.info("模拟无人机已降落")
        
    def goto(self, lat, lon, alt):
        """飞往指定位置"""
        logger.info(f"模拟无人机飞往 ({lat}, {lon}, {alt})")
        
        # 模拟飞行时间
        distance = ((lat - self.latitude) ** 2 + (lon - self.longitude) ** 2) ** 0.5 * 111000
        speed = 5.0  # 假设速度为5m/s
        flight_time = distance / speed
        
        # 模拟飞行过程
        start_lat = self.latitude
        start_lon = self.longitude
        start_alt = self.altitude
        
        for i in range(10):
            progress = (i + 1) / 10
            self.latitude = start_lat + (lat - start_lat) * progress
            self.longitude = start_lon + (lon - start_lon) * progress
            self.altitude = start_alt + (alt - start_alt) * progress
            time.sleep(flight_time / 10)
            
        self.latitude = lat
        self.longitude = lon
        self.altitude = alt
        logger.info(f"模拟无人机已到达 ({lat}, {lon}, {alt})")


def setup_simulation():
    """设置模拟环境"""
    # 启动模拟器
    simulator = DroneSimulator()
    simulator.start()
    
    # 创建SITL连接字符串和覆盖环境变量
    os.environ['DRONE_CONNECTION_STRING'] = f'udpin:localhost:{simulator.port}'
    
    return simulator


def run_simulation():
    """运行模拟"""
    # 设置参数解析
    parser = argparse.ArgumentParser(description='智能战场医疗后送系统模拟器')
    parser.add_argument('--web-port', type=int, default=8080, help='Web服务端口')
    parser.add_argument('--comm-port', type=int, default=5000, help='通信服务端口')
    parser.add_argument('--drone-port', type=int, default=14550, help='无人机模拟器端口')
    args = parser.parse_args()
    
    # 设置环境变量
    os.environ['WEB_PORT'] = str(args.web_port)
    os.environ['COMM_PORT'] = str(args.comm_port)
    
    # 启动模拟器
    simulator = DroneSimulator(port=args.drone_port)
    simulator.start()
    
    # 导入主程序模块
    from main import MedicalEvacuationSystem
    
    # 创建系统实例
    system = MedicalEvacuationSystem()
    
    # 注册信号处理
    def signal_handler(sig, frame):
        logger.info("接收到停止信号，正在关闭模拟器...")
        system.stop()
        simulator.stop()
        sys.exit(0)
        
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)
    
    # 启动系统
    try:
        if system.start():
            logger.info("系统启动成功，运行在模拟模式")
            
            # 保持程序运行
            while True:
                time.sleep(1)
        else:
            logger.error("系统启动失败")
            simulator.stop()
            return 1
    except Exception as e:
        logger.error(f"模拟运行错误: {str(e)}")
        system.stop()
        simulator.stop()
        return 1
        
    return 0


if __name__ == "__main__":
    exit_code = run_simulation()
    sys.exit(exit_code)