"""
Routes pour l'audit et les logs d'activité
"""
import logging
from fastapi import APIRouter, HTTPException, Query, Request
from typing import Optional
from datetime import datetime
from ..database import db
from ..config import settings

router = APIRouter(prefix="/api/audit", tags=["audit"])
logger = logging.getLogger(__name__)


@router.post("/logs")
async def create_audit_log(
    request: Request,
    action: str,
    entity_type: Optional[str] = None,
    entity_id: Optional[str] = None,
    entity_count: Optional[int] = None,
    details: Optional[dict] = None,
    user: Optional[str] = "soc_user"
):
    """
    Crée un log d'audit pour une action utilisateur
    """
    try:
        # Récupérer l'IP du client
        client_ip = request.client.host if request.client else "unknown"
        
        # Insérer dans ClickHouse
        insert_query = f"""
        INSERT INTO {settings.CLICKHOUSE_DB_PROCESSING}.audit_logs 
        (timestamp, user_name, action, entity_type, entity_id, entity_count, details, client_ip)
        VALUES 
        (%(timestamp)s, %(user)s, %(action)s, %(entity_type)s, %(entity_id)s, %(entity_count)s, %(details)s, %(client_ip)s)
        """
        
        params = {
            'timestamp': datetime.now(),
            'user': user,
            'action': action,
            'entity_type': entity_type,
            'entity_id': entity_id,
            'entity_count': entity_count,
            'details': str(details) if details else '',
            'client_ip': client_ip
        }
        
        # Note: This requires the audit_logs table to exist
        # See deploy_audit_logs_table.sql
        try:
            db.query(insert_query, params)
        except Exception as e:
            # La table peut ne pas encore exister — on logue mais on ne bloque pas l'appelant
            logger.warning(f"Could not insert audit log: {e}")
        
        return {
            "status": "success",
            "message": "Audit log created",
            "action": action,
            "timestamp": params['timestamp'].isoformat()
        }
        
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Erreur: {str(e)}")


@router.get("/logs")
async def get_audit_logs(
    hours: int = Query(24, ge=1, le=720, description="Fenêtre temporelle en heures"),
    user: Optional[str] = Query(None, description="Filtrer par utilisateur"),
    action: Optional[str] = Query(None, description="Filtrer par action"),
    entity_type: Optional[str] = Query(None, description="Filtrer par type d'entité"),
    limit: int = Query(100, ge=1, le=1000, description="Nombre maximum de résultats")
):
    """
    Récupère les logs d'audit avec filtres
    """
    try:
        where_clauses = ["timestamp >= now() - INTERVAL %(hours)s HOUR"]
        params = {"hours": hours, "limit": limit}
        
        if user:
            where_clauses.append("user_name = %(user)s")
            params["user"] = user
            
        if action:
            where_clauses.append("action = %(action)s")
            params["action"] = action
            
        if entity_type:
            where_clauses.append("entity_type = %(entity_type)s")
            params["entity_type"] = entity_type
        
        where_clause = " AND ".join(where_clauses)
        
        query = f"""
        SELECT
            timestamp,
            user_name,
            action,
            entity_type,
            entity_id,
            entity_count,
            details,
            client_ip
        FROM {settings.CLICKHOUSE_DB_PROCESSING}.audit_logs
        WHERE {where_clause}
        ORDER BY timestamp DESC
        LIMIT %(limit)s
        """
        
        result = db.query(query, params)
        
        logs = []
        for row in result.result_rows:
            logs.append({
                "timestamp": row[0].isoformat() if row[0] else "",
                "user_name": row[1] or "",
                "action": row[2] or "",
                "entity_type": row[3] or "",
                "entity_id": row[4] or "",
                "entity_count": row[5] or 0,
                "details": row[6] or "",
                "client_ip": row[7] or ""
            })
        
        return {
            "items": logs,
            "total": len(logs),
            "period_hours": hours
        }
        
    except Exception as e:
        # If table doesn't exist, return empty result
        if "Table" in str(e) and "doesn't exist" in str(e):
            return {
                "items": [],
                "total": 0,
                "period_hours": hours,
                "warning": "Audit logs table not created yet"
            }
        raise HTTPException(status_code=500, detail=f"Erreur: {str(e)}")


@router.get("/stats")
async def get_audit_stats(
    hours: int = Query(24, ge=1, le=720)
):
    """
    Statistiques d'audit
    """
    try:
        query = f"""
        SELECT
            action,
            count() AS count,
            uniq(user_name) AS unique_users,
            sum(entity_count) AS total_entities
        FROM {settings.CLICKHOUSE_DB_PROCESSING}.audit_logs
        WHERE timestamp >= now() - INTERVAL %(hours)s HOUR
        GROUP BY action
        ORDER BY count DESC
        """
        
        result = db.query(query, {"hours": hours})
        
        stats = []
        for row in result.result_rows:
            stats.append({
                "action": row[0] or "",
                "count": row[1] or 0,
                "unique_users": row[2] or 0,
                "total_entities": row[3] or 0
            })
        
        return {
            "items": stats,
            "period_hours": hours
        }
        
    except Exception as e:
        if "Table" in str(e) and "doesn't exist" in str(e):
            return {
                "items": [],
                "period_hours": hours,
                "warning": "Audit logs table not created yet"
            }
        raise HTTPException(status_code=500, detail=f"Erreur: {str(e)}")


@router.get("/users/activity")
async def get_user_activity(
    hours: int = Query(24, ge=1, le=720)
):
    """
    Activité par utilisateur
    """
    try:
        query = f"""
        SELECT
            user_name,
            count() AS actions,
            uniq(action) AS action_types,
            min(timestamp) AS first_action,
            max(timestamp) AS last_action
        FROM {settings.CLICKHOUSE_DB_PROCESSING}.audit_logs
        WHERE timestamp >= now() - INTERVAL %(hours)s HOUR
        GROUP BY user_name
        ORDER BY actions DESC
        """
        
        result = db.query(query, {"hours": hours})
        
        users = []
        for row in result.result_rows:
            users.append({
                "user_name": row[0] or "",
                "actions": row[1] or 0,
                "action_types": row[2] or 0,
                "first_action": row[3].isoformat() if row[3] else "",
                "last_action": row[4].isoformat() if row[4] else ""
            })
        
        return {
            "items": users,
            "period_hours": hours
        }
        
    except Exception as e:
        if "Table" in str(e) and "doesn't exist" in str(e):
            return {
                "items": [],
                "period_hours": hours,
                "warning": "Audit logs table not created yet"
            }
        raise HTTPException(status_code=500, detail=f"Erreur: {str(e)}")