"""
Scoreboard Injector for ForcAD
Monitors Socket.IO events for attacks and alerts on critical situations
"""
import os
import json
import asyncio
from datetime import datetime, timedelta
from typing import Optional, Dict, Any
import socketio
from fastapi import FastAPI, HTTPException, Depends, Header
from pydantic import BaseModel
import asyncpg
from contextlib import asynccontextmanager

# Configuration
DATABASE_URL = os.getenv("DATABASE_URL", "postgresql://adctrl:adctrl@postgres:5432/adctrl")
SECRET_TOKEN = os.getenv("SECRET_TOKEN", "change-me-in-production")
SCOREBOARD_URL = os.getenv("SCOREBOARD_URL", "http://10.60.0.1:8080")
OUR_TEAM_ID = int(os.getenv("OUR_TEAM_ID", "1"))
ALERT_THRESHOLD_POINTS = float(os.getenv("ALERT_THRESHOLD_POINTS", "100"))
ALERT_THRESHOLD_TIME = int(os.getenv("ALERT_THRESHOLD_TIME", "300"))  # seconds
TELEGRAM_API_URL = os.getenv("TELEGRAM_API_URL", "http://tg-bot:8003/send")

# Database pool
db_pool = None
ws_task = None

class AttackStats(BaseModel):
    total_attacks: int
    attacks_by_us: int
    attacks_to_us: int
    recent_attacks: int
    critical_alerts: int

# Auth dependency
async def verify_token(authorization: str = Header(None)):
    if not authorization or not authorization.startswith("Bearer "):
        raise HTTPException(status_code=401, detail="Missing or invalid authorization header")
    
    token = authorization.replace("Bearer ", "")
    if token != SECRET_TOKEN:
        raise HTTPException(status_code=403, detail="Invalid token")
    return token

# Database functions
async def get_db():
    return await db_pool.acquire()

async def release_db(conn):
    await db_pool.release(conn)

async def process_attack_event(event: Dict[str, Any]):
    """Process attack event from scoreboard"""
    conn = await db_pool.acquire()
    try:
        # Extract attack information from event
        # Handle multiple possible event formats from ForcAD
        event_type = event.get('type', 'unknown')
        
        # Try to extract attacker/victim IDs from various possible fields
        attacker_id = event.get('attacker_id') or event.get('team_id') or event.get('attacker')
        victim_id = event.get('victim_id') or event.get('target_id') or event.get('victim') or event.get('target')
        
        # Skip if we don't have both attacker and victim
        if attacker_id is None or victim_id is None:
            print(f"Skipping event with missing attacker/victim: {event}")
            return
        
        # Convert to integers if they're strings
        try:
            attacker_id = int(attacker_id)
            victim_id = int(victim_id)
        except (ValueError, TypeError):
            print(f"Invalid team IDs in event: attacker={attacker_id}, victim={victim_id}")
            return
        
        service_name = event.get('service') or event.get('service_name') or event.get('task_name') or 'unknown'
        flag = event.get('flag', '')
        
        # Handle timestamp
        time_str = event.get('time') or event.get('timestamp')
        if time_str:
            try:
                # Try parsing ISO format
                timestamp = datetime.fromisoformat(time_str.replace('Z', '+00:00'))
            except (ValueError, AttributeError):
                # Try parsing as Unix timestamp
                try:
                    timestamp = datetime.fromtimestamp(float(time_str))
                except (ValueError, TypeError):
                    timestamp = datetime.utcnow()
        else:
            timestamp = datetime.utcnow()
        
        # Extract points (might be in different fields)
        points = float(event.get('points', 0) or event.get('score', 0) or 1.0)
        
        # Generate unique attack ID
        round_num = event.get('round', event.get('round_id', 0))
        attack_id = event.get('id') or f"{round_num}_{attacker_id}_{victim_id}_{service_name}_{int(timestamp.timestamp())}"
        
        is_our_attack = attacker_id == OUR_TEAM_ID
        is_attack_to_us = victim_id == OUR_TEAM_ID
        
        # Only log if it involves our team
        if is_our_attack or is_attack_to_us:
            # Store attack in database
            inserted = await conn.fetchval("""
                INSERT INTO attacks (attack_id, attacker_team_id, victim_team_id, service_name, flag, timestamp, points, is_our_attack, is_attack_to_us)
                VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
                ON CONFLICT (attack_id) DO NOTHING
                RETURNING id
            """, attack_id, attacker_id, victim_id, service_name, flag, timestamp, points, is_our_attack, is_attack_to_us)
            
            if inserted:
                print(f"[{event_type}] Logged attack: Team {attacker_id} -> Team {victim_id} | {service_name} | {points} pts")
                
                # Check for alert conditions if attack is against us
                if is_attack_to_us:
                    await check_and_create_alerts(conn, attacker_id, service_name)
    
    except Exception as e:
        print(f"Error processing attack event: {e}")
        print(f"Event data: {event}")
    finally:
        await db_pool.release(conn)

async def check_and_create_alerts(conn, attacker_id: int, service_name: str):
    """Check if we should create an alert for attacks against us"""
    threshold_time = datetime.utcnow() - timedelta(seconds=ALERT_THRESHOLD_TIME)
    
    # Check total points lost from this attacker in threshold time
    result = await conn.fetchrow("""
        SELECT COUNT(*) as attack_count, COALESCE(SUM(points), 0) as total_points
        FROM attacks
        WHERE is_attack_to_us = true
        AND attacker_team_id = $1
        AND service_name = $2
        AND timestamp > $3
    """, attacker_id, service_name, threshold_time)
    
    if result and result['total_points'] >= ALERT_THRESHOLD_POINTS:
        # Create alert
        alert_message = f"CRITICAL: Team {attacker_id} has stolen {result['total_points']:.2f} points from service {service_name} in the last {ALERT_THRESHOLD_TIME}s ({result['attack_count']} attacks)"
        
        # Check if we already alerted recently
        recent_alert = await conn.fetchrow("""
            SELECT id FROM attack_alerts
            WHERE alert_type = 'high_point_loss'
            AND message LIKE $1
            AND created_at > $2
        """, f"%Team {attacker_id}%{service_name}%", threshold_time)
        
        if not recent_alert:
            alert_id = await conn.fetchval("""
                INSERT INTO attack_alerts (attack_id, alert_type, severity, message)
                VALUES (
                    (SELECT id FROM attacks WHERE attacker_team_id = $1 AND service_name = $2 ORDER BY timestamp DESC LIMIT 1),
                    'high_point_loss',
                    'critical',
                    $3
                )
                RETURNING id
            """, attacker_id, service_name, alert_message)
            
            # Send to telegram
            await send_telegram_alert(alert_message)
            
            # Mark as notified
            await conn.execute("UPDATE attack_alerts SET notified = true WHERE id = $1", alert_id)

async def send_telegram_alert(message: str):
    """Send alert to telegram bot"""
    import aiohttp
    try:
        async with aiohttp.ClientSession() as session:
            async with session.post(
                TELEGRAM_API_URL,
                json={"message": message},
                headers={"Authorization": f"Bearer {SECRET_TOKEN}"}
            ) as resp:
                if resp.status != 200:
                    print(f"Failed to send telegram alert: {await resp.text()}")
    except Exception as e:
        print(f"Error sending telegram alert: {e}")

async def socketio_listener():
    """Listen to ForcAD scoreboard using Socket.IO"""
    sio = socketio.AsyncClient(logger=False, engineio_logger=False)
    
    # Cache for task names
    task_names = {}
    
    @sio.event(namespace='/game_events')
    async def update_scoreboard(data):
        """Handle scoreboard update - compare with previous state to detect NEW attacks"""
        try:
            event_data = data.get('data', {})
            round_num = event_data.get('round', 0)
            round_start = event_data.get('round_start', 0)
            team_tasks = event_data.get('team_tasks', [])
            
            print(f"📊 Round {round_num} - Processing {len(team_tasks)} team updates")
            
            conn = await db_pool.acquire()
            try:
                for team_task in team_tasks:
                    team_id = team_task.get('team_id')
                    task_id = team_task.get('task_id')
                    current_stolen = team_task.get('stolen', 0)
                    current_lost = team_task.get('lost', 0)
                    
                    service_name = task_names.get(task_id, f"task_{task_id}")
                    
                    # Get previous state from database
                    prev_state = await conn.fetchrow(
                        "SELECT stolen_flags, lost_flags FROM scoreboard_state WHERE team_id = $1 AND service_name = $2",
                        team_id, service_name
                    )
                    
                    prev_stolen = prev_state['stolen_flags'] if prev_state else 0
                    prev_lost = prev_state['lost_flags'] if prev_state else 0
                    
                    # Calculate NEW flags (difference from previous state)
                    new_stolen = current_stolen - prev_stolen
                    new_lost = current_lost - prev_lost
                    
                    # Update current state in database
                    await conn.execute("""
                        INSERT INTO scoreboard_state (team_id, service_name, stolen_flags, lost_flags, last_updated)
                        VALUES ($1, $2, $3, $4, NOW())
                        ON CONFLICT (team_id, service_name) 
                        DO UPDATE SET stolen_flags = $3, lost_flags = $4, last_updated = NOW()
                    """, team_id, service_name, current_stolen, current_lost)
                    
                    # Create attack record only for NEW stolen flags
                    if new_stolen > 0:
                        timestamp = datetime.utcnow()
                        attack_id = f"r{round_num}_stolen_team{team_id}_{service_name}_{int(timestamp.timestamp())}"
                        
                        is_our_attack = team_id == OUR_TEAM_ID
                        
                        await conn.execute("""
                            INSERT INTO attacks (attack_id, attacker_team_id, service_name, timestamp, points, is_our_attack, is_attack_to_us)
                            VALUES ($1, $2, $3, $4, $5, $6, $7)
                            ON CONFLICT (attack_id) DO NOTHING
                        """, attack_id, team_id, service_name, timestamp, float(new_stolen), is_our_attack, False)
                        
                        if is_our_attack:
                            print(f"  ✅ We stole {new_stolen} NEW flags from {service_name} (total: {current_stolen})")
                        else:
                            print(f"  📌 Team {team_id} stole {new_stolen} NEW flags from {service_name} (total: {current_stolen})")
                    
                    # Create attack record only for NEW lost flags
                    if new_lost > 0:
                        timestamp = datetime.utcnow()
                        attack_id = f"r{round_num}_lost_team{team_id}_{service_name}_{int(timestamp.timestamp())}"
                        
                        is_attack_to_us = team_id == OUR_TEAM_ID
                        
                        await conn.execute("""
                            INSERT INTO attacks (attack_id, victim_team_id, service_name, timestamp, points, is_our_attack, is_attack_to_us)
                            VALUES ($1, $2, $3, $4, $5, $6, $7)
                            ON CONFLICT (attack_id) DO NOTHING
                        """, attack_id, team_id, service_name, timestamp, float(new_lost), False, is_attack_to_us)
                        
                        if is_attack_to_us:
                            print(f"  ⚠️  We LOST {new_lost} NEW flags on {service_name} (total lost: {current_lost})")
                            
                            # Check for alerts on high-value attacks
                            if new_lost >= ALERT_THRESHOLD_POINTS:
                                await check_and_create_alerts(conn, 0, service_name)
                        else:
                            print(f"  📌 Team {team_id} lost {new_lost} NEW flags on {service_name} (total: {current_lost})")
            finally:
                await db_pool.release(conn)
                        
        except Exception as e:
            print(f"Error processing update_scoreboard: {e}")
            import traceback
            traceback.print_exc()
    
    @sio.event(namespace='/game_events')
    async def init_scoreboard(data):
        """Handle initial scoreboard data"""
        try:
            print("📡 Received initial scoreboard data")
            event_data = data.get('data', {})
            teams = event_data.get('teams', [])
            tasks = event_data.get('tasks', [])
            
            # Cache task names
            for task in tasks:
                task_names[task.get('id')] = task.get('name')
            
            team_names_str = ', '.join([f"{t.get('name')} (ID:{t.get('id')})" for t in teams])
            task_names_str = ', '.join([t.get('name') for t in tasks])
            print(f"  Teams: {team_names_str}")
            print(f"  Tasks: {task_names_str}")
                
        except Exception as e:
            print(f"Error processing init_scoreboard: {e}")
    
    @sio.event
    async def connect():
        print("✅ Connected to ForcAD scoreboard Socket.IO")
    
    @sio.event
    async def disconnect():
        print("❌ Disconnected from scoreboard")
    
    while True:
        try:
            print(f"Connecting to {SCOREBOARD_URL}/socket.io ...")
            await sio.connect(
                SCOREBOARD_URL,
                namespaces=['/game_events'],
                transports=['websocket']
            )
            await sio.wait()
        except Exception as e:
            print(f"Socket.IO error: {e}")
            print("Reconnecting in 5 seconds...")
            await asyncio.sleep(5)

# Lifespan context
@asynccontextmanager
async def lifespan(app: FastAPI):
    global db_pool, ws_task
    db_pool = await asyncpg.create_pool(DATABASE_URL, min_size=2, max_size=10)
    
    print(f"Starting Socket.IO listener")
    print(f"Scoreboard URL: {SCOREBOARD_URL}")
    print(f"Our team ID: {OUR_TEAM_ID}")
    
    ws_task = asyncio.create_task(socketio_listener())
    
    yield
    
    # Cleanup
    if ws_task:
        ws_task.cancel()
        try:
            await ws_task
        except asyncio.CancelledError:
            pass
    
    await db_pool.close()

app = FastAPI(title="Scoreboard Injector", lifespan=lifespan)

# API Endpoints
@app.get("/health")
async def health_check():
    return {
        "status": "ok",
        "timestamp": datetime.utcnow().isoformat(),
        "team_id": OUR_TEAM_ID,
        "mode": "socketio",
        "scoreboard_url": SCOREBOARD_URL
    }

@app.get("/stats", dependencies=[Depends(verify_token)])
async def get_stats():
    """Get attack statistics"""
    conn = await get_db()
    try:
        total = await conn.fetchval("SELECT COUNT(*) FROM attacks")
        attacks_by_us = await conn.fetchval("SELECT COUNT(*) FROM attacks WHERE is_our_attack = true")
        attacks_to_us = await conn.fetchval("SELECT COUNT(*) FROM attacks WHERE is_attack_to_us = true")
        
        threshold_time = datetime.utcnow() - timedelta(minutes=5)
        recent = await conn.fetchval("SELECT COUNT(*) FROM attacks WHERE timestamp > $1", threshold_time)
        
        critical_alerts = await conn.fetchval(
            "SELECT COUNT(*) FROM attack_alerts WHERE severity = 'critical' AND created_at > $1",
            threshold_time
        )
        
        return {
            "total_attacks": total,
            "attacks_by_us": attacks_by_us,
            "attacks_to_us": attacks_to_us,
            "recent_attacks_5min": recent,
            "critical_alerts_5min": critical_alerts
        }
    finally:
        await release_db(conn)

@app.get("/attacks", dependencies=[Depends(verify_token)])
async def get_attacks(limit: int = 100, our_attacks: Optional[bool] = None, attacks_to_us: Optional[bool] = None):
    """Get recent attacks"""
    conn = await get_db()
    try:
        query = "SELECT * FROM attacks WHERE 1=1"
        params = []
        param_count = 0
        
        if our_attacks is not None:
            param_count += 1
            query += f" AND is_our_attack = ${param_count}"
            params.append(our_attacks)
        
        if attacks_to_us is not None:
            param_count += 1
            query += f" AND is_attack_to_us = ${param_count}"
            params.append(attacks_to_us)
        
        param_count += 1
        query += f" ORDER BY timestamp DESC LIMIT ${param_count}"
        params.append(limit)
        
        rows = await conn.fetch(query, *params)
        return [dict(row) for row in rows]
    finally:
        await release_db(conn)

@app.get("/alerts", dependencies=[Depends(verify_token)])
async def get_alerts(limit: int = 50, unnotified: bool = False):
    """Get alerts"""
    conn = await get_db()
    try:
        if unnotified:
            query = "SELECT * FROM attack_alerts WHERE notified = false ORDER BY created_at DESC LIMIT $1"
        else:
            query = "SELECT * FROM attack_alerts ORDER BY created_at DESC LIMIT $1"
        
        rows = await conn.fetch(query, limit)
        return [dict(row) for row in rows]
    finally:
        await release_db(conn)

@app.post("/alerts/{alert_id}/acknowledge", dependencies=[Depends(verify_token)])
async def acknowledge_alert(alert_id: int):
    """Mark alert as acknowledged"""
    conn = await get_db()
    try:
        await conn.execute("UPDATE attack_alerts SET notified = true WHERE id = $1", alert_id)
        return {"status": "acknowledged", "alert_id": alert_id}
    finally:
        await release_db(conn)

@app.get("/attacks/by-service", dependencies=[Depends(verify_token)])
async def get_attacks_by_service():
    """Get attack statistics grouped by service"""
    conn = await get_db()
    try:
        rows = await conn.fetch("""
            SELECT 
                service_name,
                COUNT(*) as total_attacks,
                COUNT(*) FILTER (WHERE is_our_attack = true) as our_attacks,
                COUNT(*) FILTER (WHERE is_attack_to_us = true) as attacks_to_us,
                COALESCE(SUM(points) FILTER (WHERE is_our_attack = true), 0) as points_gained,
                COALESCE(SUM(points) FILTER (WHERE is_attack_to_us = true), 0) as points_lost
            FROM attacks
            GROUP BY service_name
            ORDER BY total_attacks DESC
        """)
        return [dict(row) for row in rows]
    finally:
        await release_db(conn)

@app.post("/settings/team-id", dependencies=[Depends(verify_token)])
async def set_team_id(team_id: int):
    """Update our team ID"""
    global OUR_TEAM_ID
    OUR_TEAM_ID = team_id
    
    conn = await get_db()
    try:
        await conn.execute(
            "INSERT INTO settings (key, value) VALUES ('our_team_id', $1) ON CONFLICT (key) DO UPDATE SET value = $1",
            str(team_id)
        )
        return {"team_id": team_id}
    finally:
        await release_db(conn)

@app.get("/settings/team-id", dependencies=[Depends(verify_token)])
async def get_team_id():
    """Get current team ID setting"""
    return {"team_id": OUR_TEAM_ID}

@app.post("/test/inject-attack", dependencies=[Depends(verify_token)])
async def inject_test_attack(attacker_id: int, victim_id: int, service: str = "test-service", points: float = 10.0):
    """Manually inject a test attack event for debugging"""
    test_event = {
        "type": "attack",
        "attacker_id": attacker_id,
        "victim_id": victim_id,
        "service": service,
        "flag": "TEST_FLAG_" + datetime.utcnow().isoformat(),
        "points": points,
        "time": datetime.utcnow().isoformat(),
        "round": 1
    }
    
    await process_attack_event(test_event)
    return {"status": "injected", "event": test_event}

@app.get("/debug/scoreboard", dependencies=[Depends(verify_token)])
async def debug_scoreboard():
    """Check if scoreboard is reachable and show connection info"""
    import aiohttp
    
    results = {
        "mode": "socketio",
        "config": {
            "scoreboard_url": SCOREBOARD_URL,
            "our_team_id": OUR_TEAM_ID
        },
        "endpoints_tested": []
    }
    
    try:
        async with aiohttp.ClientSession() as session:
            # Test Socket.IO endpoint
            socketio_url = f"{SCOREBOARD_URL}/socket.io/?EIO=4&transport=polling"
            try:
                async with session.get(socketio_url, timeout=aiohttp.ClientTimeout(total=5)) as resp:
                    results["socketio_status"] = {
                        "url": socketio_url,
                        "status": resp.status,
                        "reachable": resp.status == 200,
                        "response_preview": (await resp.text())[:200] if resp.status == 200 else None
                    }
            except Exception as e:
                results["socketio_status"] = {
                    "url": socketio_url,
                    "reachable": False,
                    "error": str(e)
                }
            
            # Test base scoreboard URL
            try:
                async with session.get(SCOREBOARD_URL, timeout=aiohttp.ClientTimeout(total=5)) as resp:
                    results["base_url_status"] = {
                        "url": SCOREBOARD_URL,
                        "status": resp.status,
                        "reachable": resp.status == 200
                    }
            except Exception as e:
                results["base_url_status"] = {
                    "url": SCOREBOARD_URL,
                    "reachable": False,
                    "error": str(e)
                }
            
            # Test attack_data endpoint (for reference only)
            attack_data_url = f"{SCOREBOARD_URL}/api/client/attack_data"
            try:
                async with session.get(attack_data_url, timeout=aiohttp.ClientTimeout(total=5)) as resp:
                    result = {
                        "url": attack_data_url,
                        "status": resp.status,
                        "reachable": resp.status == 200,
                        "content_type": resp.headers.get('Content-Type', ''),
                        "note": "Contains exploit credentials, not attack events"
                    }
                    if resp.status == 200 and 'application/json' in resp.headers.get('Content-Type', ''):
                        data = await resp.json()
                        result["services"] = list(data.keys()) if isinstance(data, dict) else None
                    results["endpoints_tested"].append(result)
            except Exception as e:
                results["endpoints_tested"].append({
                    "url": attack_data_url,
                    "reachable": False,
                    "error": str(e)
                })
    except Exception as e:
        results["error"] = str(e)
    
    return results

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=8002)