"""
Hybrid API Endpoints for SAAP OpenRouter Integration
Additional endpoints to support multi-provider functionality
"""

from fastapi import APIRouter, HTTPException, Depends
from typing import Dict, Optional, Any
import logging
from datetime import datetime

from services.agent_manager_hybrid import HybridAgentManagerService

logger = logging.getLogger(__name__)

# Router for hybrid endpoints
hybrid_router = APIRouter(prefix="/api/v1/hybrid", tags=["hybrid"])

def get_hybrid_manager() -> HybridAgentManagerService:
    """Dependency to get hybrid agent manager (if available)"""
    # This will be injected by main.py if hybrid mode is enabled
    return None

# =====================================================
# PROVIDER COMPARISON & PERFORMANCE ENDPOINTS
# =====================================================

@hybrid_router.post("/agents/{agent_id}/compare")
async def compare_providers(
    agent_id: str,
    message_data: Dict[str, str],
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    🆚 Send same message to both colossus and OpenRouter for comparison
    Useful for benchmarking performance and cost analysis
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    try:
        message = message_data.get("message", "")
        if not message:
            raise HTTPException(status_code=400, detail="Message content required")
        
        logger.info(f"📊 Provider comparison requested for {agent_id}")
        
        # Send to both providers
        comparison = await hybrid_manager.compare_providers(agent_id, message)
        
        if "error" in comparison:
            return {
                "success": False,
                "error": comparison["error"],
                "timestamp": datetime.utcnow().isoformat()
            }
        
        logger.info(f"✅ Provider comparison completed for {agent_id}")
        
        return {
            "success": True,
            "comparison": comparison,
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ Provider comparison error: {e}")
        raise HTTPException(status_code=500, detail=f"Comparison failed: {str(e)}")

@hybrid_router.get("/stats/providers")
async def get_provider_statistics(
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    📊 Get comprehensive provider performance statistics
    Returns success rates, response times, and cost data
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    try:
        stats = hybrid_manager.get_provider_stats()
        
        return {
            "success": True,
            "statistics": stats,
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ Provider stats error: {e}")
        raise HTTPException(status_code=500, detail=f"Statistics failed: {str(e)}")

@hybrid_router.get("/costs/openrouter")
async def get_openrouter_costs(
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    💰 Get OpenRouter cost summary and budget status
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    if not hybrid_manager.openrouter_client:
        raise HTTPException(status_code=503, detail="OpenRouter client not available")
    
    try:
        cost_summary = hybrid_manager.openrouter_client.get_cost_summary()
        
        return {
            "success": True,
            "costs": cost_summary,
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ OpenRouter cost error: {e}")
        raise HTTPException(status_code=500, detail=f"Cost summary failed: {str(e)}")

# =====================================================
# PROVIDER SWITCHING & CONFIGURATION
# =====================================================

@hybrid_router.post("/config/primary-provider")
async def set_primary_provider(
    config_data: Dict[str, str],
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    🔄 Switch primary provider (colossus/openrouter)
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    try:
        provider = config_data.get("provider", "")
        if provider not in ["colossus", "openrouter"]:
            raise HTTPException(status_code=400, detail="Provider must be 'colossus' or 'openrouter'")
        
        success = await hybrid_manager.set_primary_provider(provider)
        
        if success:
            return {
                "success": True,
                "message": f"Primary provider set to {provider}",
                "provider": provider,
                "timestamp": datetime.utcnow().isoformat()
            }
        else:
            raise HTTPException(status_code=400, detail=f"Failed to switch to {provider}")
            
    except HTTPException:
        raise
    except Exception as e:
        logger.error(f"❌ Provider switch error: {e}")
        raise HTTPException(status_code=500, detail=f"Provider switch failed: {str(e)}")

@hybrid_router.get("/config/status")
async def get_hybrid_status(
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    ℹ️ Get hybrid system configuration and status
    """
    if not hybrid_manager:
        return {
            "hybrid_enabled": False,
            "message": "Hybrid mode not available",
            "timestamp": datetime.utcnow().isoformat()
        }
    
    try:
        # Check provider availability
        providers_status = {
            "colossus": {
                "available": hybrid_manager.colossus_client is not None,
                "status": hybrid_manager.colossus_connection_status if hasattr(hybrid_manager, 'colossus_connection_status') else "unknown"
            },
            "openrouter": {
                "available": hybrid_manager.openrouter_client is not None,
                "status": "unknown"
            }
        }
        
        # Test OpenRouter if available
        if hybrid_manager.openrouter_client:
            try:
                or_health = await hybrid_manager.openrouter_client.health_check()
                providers_status["openrouter"]["status"] = or_health.get("status", "unknown")
                providers_status["openrouter"]["daily_cost"] = or_health.get("daily_cost", 0)
                providers_status["openrouter"]["budget_remaining"] = or_health.get("budget_remaining", 0)
            except Exception as e:
                providers_status["openrouter"]["status"] = f"error: {e}"
        
        return {
            "hybrid_enabled": True,
            "primary_provider": hybrid_manager.primary_provider,
            "failover_enabled": hybrid_manager.enable_failover,
            "cost_comparison_enabled": hybrid_manager.enable_cost_comparison,
            "providers": providers_status,
            "loaded_agents": len(hybrid_manager.agents),
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ Hybrid status error: {e}")
        raise HTTPException(status_code=500, detail=f"Status check failed: {str(e)}")

# =====================================================
# OPTIONAL: DIRECT PROVIDER ENDPOINTS
# =====================================================

@hybrid_router.post("/agents/{agent_id}/chat/colossus")
async def chat_with_colossus(
    agent_id: str,
    message_data: Dict[str, str],
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    🤖 Direct chat with agent via colossus (bypass primary provider setting)
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    try:
        message = message_data.get("message", "")
        if not message:
            raise HTTPException(status_code=400, detail="Message content required")
        
        # Force colossus provider
        response = await hybrid_manager.send_message_to_agent(agent_id, message, "colossus")
        
        if "error" in response:
            return {
                "success": False,
                "error": response["error"],
                "provider": "colossus",
                "timestamp": datetime.utcnow().isoformat()
            }
        
        return {
            "success": True,
            "agent_id": agent_id,
            "message": message,
            "response": response,
            "provider": "colossus",
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ colossus chat error: {e}")
        raise HTTPException(status_code=500, detail=f"colossus chat failed: {str(e)}")

@hybrid_router.post("/agents/{agent_id}/chat/openrouter")
async def chat_with_openrouter(
    agent_id: str,
    message_data: Dict[str, str],
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    🌐 Direct chat with agent via OpenRouter (bypass primary provider setting)
    """
    if not hybrid_manager:
        raise HTTPException(status_code=503, detail="Hybrid mode not enabled")
    
    if not hybrid_manager.openrouter_client:
        raise HTTPException(status_code=503, detail="OpenRouter client not available")
    
    try:
        message = message_data.get("message", "")
        if not message:
            raise HTTPException(status_code=400, detail="Message content required")
        
        # Force OpenRouter provider
        response = await hybrid_manager.send_message_to_agent(agent_id, message, "openrouter")
        
        if "error" in response:
            return {
                "success": False,
                "error": response["error"],
                "provider": "openrouter",
                "timestamp": datetime.utcnow().isoformat()
            }
        
        return {
            "success": True,
            "agent_id": agent_id,
            "message": message,
            "response": response,
            "provider": "openrouter",
            "timestamp": datetime.utcnow().isoformat()
        }
        
    except Exception as e:
        logger.error(f"❌ OpenRouter chat error: {e}")
        raise HTTPException(status_code=500, detail=f"OpenRouter chat failed: {str(e)}")

# =====================================================
# HEALTH CHECK FOR HYBRID SYSTEM
# =====================================================

@hybrid_router.get("/health")
async def hybrid_health_check(
    hybrid_manager: HybridAgentManagerService = Depends(get_hybrid_manager)
):
    """
    🏥 Comprehensive health check for hybrid system
    """
    if not hybrid_manager:
        return {
            "status": "hybrid_disabled",
            "message": "Hybrid mode not enabled - using standard mode",
            "timestamp": datetime.utcnow().isoformat()
        }
    
    try:
        health_status = {
            "status": "healthy",
            "providers": {},
            "agents_loaded": len(hybrid_manager.agents),
            "primary_provider": hybrid_manager.primary_provider,
            "timestamp": datetime.utcnow().isoformat()
        }
        
        # Check colossus
        if hybrid_manager.colossus_client:
            try:
                # Test colossus connection if method available
                if hasattr(hybrid_manager, '_test_colossus_connection'):
                    await hybrid_manager._test_colossus_connection()
                health_status["providers"]["colossus"] = {
                    "status": getattr(hybrid_manager, 'colossus_connection_status', 'unknown'),
                    "available": True
                }
            except Exception as e:
                health_status["providers"]["colossus"] = {
                    "status": f"error: {e}",
                    "available": False
                }
        else:
            health_status["providers"]["colossus"] = {
                "status": "not_configured",
                "available": False
            }
        
        # Check OpenRouter
        if hybrid_manager.openrouter_client:
            try:
                or_health = await hybrid_manager.openrouter_client.health_check()
                health_status["providers"]["openrouter"] = {
                    "status": or_health.get("status", "unknown"),
                    "available": or_health.get("status") == "healthy",
                    "daily_cost": or_health.get("daily_cost", 0),
                    "budget_remaining": or_health.get("budget_remaining", 0)
                }
            except Exception as e:
                health_status["providers"]["openrouter"] = {
                    "status": f"error: {e}",
                    "available": False
                }
        else:
            health_status["providers"]["openrouter"] = {
                "status": "not_configured",
                "available": False
            }
        
        # Overall health status
        provider_count = sum(1 for p in health_status["providers"].values() if p["available"])
        if provider_count == 0:
            health_status["status"] = "unhealthy"
            health_status["message"] = "No providers available"
        elif provider_count == 1:
            health_status["status"] = "degraded"
            health_status["message"] = "Only one provider available"
        else:
            health_status["status"] = "healthy"
            health_status["message"] = "All providers operational"
        
        return health_status
        
    except Exception as e:
        logger.error(f"❌ Hybrid health check error: {e}")
        return {
            "status": "error",
            "error": str(e),
            "timestamp": datetime.utcnow().isoformat()
        }

# Export router for main.py integration
__all__ = ["hybrid_router", "get_hybrid_manager"]