from flask import Flask, jsonify, request
import threading
import time
import random
import socket
import sys
from urllib.parse import urlparse
from datetime import datetime

app = Flask(__name__)

# ====== 全局状态 ======
attack_status = {
    'running': False,
    'target_url': '',
    'threads': 50,
    'connections_per_thread': 3,
    'duration': 30,
    'request_interval': 0.1,
    'start_time': None,
    'stats': {
        'total_requests': 0,
        'successful': 0,
        'failed': 0,
        'active_connections': 0,
        'current_rps': 0,
        'last_update': None
    }
}

attack_threads = []
status_lock = threading.Lock()

# ====== 压力测试核心类 ======
class PressureWorker:
    def __init__(self, worker_id, target_url, config):
        self.worker_id = worker_id
        self.target_url = target_url
        self.config = config
        self.running = True
        
        # 解析URL
        parsed = urlparse(target_url)
        self.hostname = parsed.hostname
        self.port = parsed.port or (443 if parsed.scheme == 'https' else 80)
        self.path = parsed.path or '/'
        if parsed.query:
            self.path += f"?{parsed.query}"
        
        # 解析IP
        try:
            self.ip = socket.gethostbyname(self.hostname)
        except:
            self.ip = None
        
    def create_connection(self):
        """创建TCP连接"""
        if not self.ip:
            return None
            
        try:
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            sock.settimeout(5)
            sock.connect((self.ip, self.port))
            
            with status_lock:
                attack_status['stats']['active_connections'] += 1
            return sock
        except:
            return None
    
    def create_request(self):
        """创建HTTP请求"""
        user_agents = [
            "Mozilla/5.0",
            "TestBot/1.0",
            f"Worker-{self.worker_id}"
        ]
        
        headers = [
            f"GET {self.path} HTTP/1.1",
            f"Host: {self.hostname}",
            f"User-Agent: {random.choice(user_agents)}",
            "Accept: */*",
            "Connection: keep-alive",
            "\r\n"
        ]
        
        return "\r\n".join(headers).encode()
    
    def run(self):
        """工作线程主循环"""
        connections = []
        
        # 建立初始连接
        for _ in range(self.config['connections_per_thread']):
            sock = self.create_connection()
            if sock:
                connections.append(sock)
            time.sleep(0.05)
        
        end_time = time.time() + self.config['duration']
        
        # 主循环
        while self.running and time.time() < end_time and connections:
            for sock in connections[:]:
                try:
                    request = self.create_request()
                    sock.send(request)
                    
                    with status_lock:
                        attack_status['stats']['total_requests'] += 1
                        attack_status['stats']['successful'] += 1
                        attack_status['stats']['last_update'] = time.time()
                    
                    # 随机接收响应
                    if random.random() > 0.3:
                        sock.settimeout(1)
                        try:
                            sock.recv(1024)
                        except:
                            pass
                    
                    time.sleep(random.uniform(
                        self.config['request_interval'] * 0.5,
                        self.config['request_interval'] * 1.5
                    ))
                    
                except Exception as e:
                    # 连接失败
                    connections.remove(sock)
                    with status_lock:
                        attack_status['stats']['active_connections'] -= 1
                        attack_status['stats']['failed'] += 1
                    
                    # 重建连接
                    new_sock = self.create_connection()
                    if new_sock:
                        connections.append(new_sock)
        
        # 清理
        for sock in connections:
            try:
                sock.close()
                with status_lock:
                    attack_status['stats']['active_connections'] -= 1
            except:
                pass

# ====== Flask路由 ======
@app.route('/')
def index():
    """首页 - 显示API信息"""
    return jsonify({
        'service': '压力测试API',
        'version': '1.0',
        'status': 'running' if attack_status['running'] else 'stopped',
        'endpoints': {
            '/': '此帮助信息',
            '/status': '获取当前状态',
            '/start': '启动压力测试 (POST)',
            '/stop': '停止压力测试',
            '/config': '查看/更新配置 (GET/POST)'
        }
    })

@app.route('/status', methods=['GET'])
def get_status():
    """获取当前状态"""
    with status_lock:
        # 计算RPS
        if attack_status['stats']['last_update']:
            time_diff = time.time() - attack_status['stats']['last_update']
            if time_diff < 5:  # 最近5秒内有更新
                attack_status['stats']['current_rps'] = attack_status['stats']['total_requests'] / max(time.time() - attack_status['start_time'], 1)
        
        status_copy = attack_status.copy()
        if status_copy['start_time']:
            status_copy['uptime'] = time.time() - status_copy['start_time']
        else:
            status_copy['uptime'] = 0
    
    return jsonify(status_copy)

@app.route('/start', methods=['POST'])
def start_attack():
    """启动压力测试"""
    global attack_threads, attack_status
    
    if attack_status['running']:
        return jsonify({'error': '压力测试已在运行中'}), 400
    
    data = request.json or {}
    
    # 获取目标URL
    target_url = data.get('target_url', attack_status['target_url'])
    if not target_url:
        return jsonify({'error': '必须提供target_url参数'}), 400
    
    # 验证URL
    try:
        parsed = urlparse(target_url)
        if not parsed.hostname:
            return jsonify({'error': '无效的URL格式'}), 400
    except:
        return jsonify({'error': '无法解析URL'}), 400
    
    # 更新配置
    with status_lock:
        attack_status['running'] = True
        attack_status['target_url'] = target_url
        attack_status['threads'] = data.get('threads', attack_status['threads'])
        attack_status['connections_per_thread'] = data.get('connections_per_thread', attack_status['connections_per_thread'])
        attack_status['duration'] = data.get('duration', attack_status['duration'])
        attack_status['request_interval'] = data.get('request_interval', attack_status['request_interval'])
        attack_status['start_time'] = time.time()
        
        # 重置统计数据
        attack_status['stats'] = {
            'total_requests': 0,
            'successful': 0,
            'failed': 0,
            'active_connections': 0,
            'current_rps': 0,
            'last_update': None
        }
    
    # 创建并启动工作线程
    attack_threads = []
    for i in range(attack_status['threads']):
        worker = PressureWorker(
            worker_id=i,
            target_url=target_url,
            config={
                'connections_per_thread': attack_status['connections_per_thread'],
                'duration': attack_status['duration'],
                'request_interval': attack_status['request_interval']
            }
        )
        thread = threading.Thread(target=worker.run, daemon=True)
        thread.start()
        attack_threads.append((worker, thread))
    
    return jsonify({
        'message': '压力测试已启动',
        'config': {
            'target_url': attack_status['target_url'],
            'threads': attack_status['threads'],
            'connections_per_thread': attack_status['connections_per_thread'],
            'duration': attack_status['duration'],
            'request_interval': attack_status['request_interval']
        }
    })

@app.route('/stop', methods=['POST'])
def stop_attack():
    """停止压力测试"""
    global attack_status, attack_threads
    
    with status_lock:
        if not attack_status['running']:
            return jsonify({'error': '没有正在运行的压力测试'}), 400
        
        attack_status['running'] = False
    
    # 停止所有工作线程
    for worker, thread in attack_threads:
        worker.running = False
    
    # 等待线程结束
    time.sleep(2)
    
    with status_lock:
        attack_status['start_time'] = None
    
    return jsonify({
        'message': '压力测试已停止',
        'final_stats': attack_status['stats']
    })

@app.route('/config', methods=['GET', 'POST'])
def manage_config():
    """查看或更新配置"""
    if request.method == 'GET':
        return jsonify({
            'current_config': {
                'target_url': attack_status['target_url'],
                'threads': attack_status['threads'],
                'connections_per_thread': attack_status['connections_per_thread'],
                'duration': attack_status['duration'],
                'request_interval': attack_status['request_interval']
            },
            'running': attack_status['running']
        })
    
    else:  # POST
        if attack_status['running']:
            return jsonify({'error': '运行中无法修改配置'}), 400
        
        data = request.json or {}
        
        with status_lock:
            if 'target_url' in data:
                attack_status['target_url'] = data['target_url']
            if 'threads' in data:
                attack_status['threads'] = max(1, min(data['threads'], 1000))
            if 'connections_per_thread' in data:
                attack_status['connections_per_thread'] = max(1, min(data['connections_per_thread'], 20))
            if 'duration' in data:
                attack_status['duration'] = max(1, min(data['duration'], 3600))
            if 'request_interval' in data:
                attack_status['request_interval'] = max(0.01, min(data['request_interval'], 1.0))
        
        return jsonify({
            'message': '配置已更新',
            'new_config': {
                'target_url': attack_status['target_url'],
                'threads': attack_status['threads'],
                'connections_per_thread': attack_status['connections_per_thread'],
                'duration': attack_status['duration'],
                'request_interval': attack_status['request_interval']
            }
        })

# ====== 主程序 ======
if __name__ == '__main__':
    # 显示启动信息
    print("=" * 60)
    print("🚀 压力测试API服务器")
    print("=" * 60)
    print("API端点:")
    print("  GET  /           - 查看API信息")
    print("  GET  /status     - 获取当前状态")
    print("  POST /start      - 启动压力测试")
    print("  POST /stop       - 停止压力测试")
    print("  GET/POST /config - 查看/更新配置")
    print("=" * 60)
    print("⚠️  警告: 仅用于合法的压力测试!")
    print("=" * 60)
    
    # 启动Flask服务器
    app.run(
        host='0.0.0.0',
        port=7860,
        debug=False,
        threaded=True
    )