"""LLM Provider routes"""
from typing import Optional
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel

from luxx.database import get_db, SessionLocal
from luxx.models import User, LLMProvider
from luxx.routes.auth import get_current_user
from luxx.utils.helpers import success_response
import httpx
import asyncio
import traceback


router = APIRouter(prefix="/providers", tags=["LLM Providers"])


class ProviderCreate(BaseModel):
    name: str
    provider_type: str = "openai"
    base_url: str
    api_key: str
    default_model: str = "gpt-4"
    is_default: bool = False


class ProviderUpdate(BaseModel):
    name: Optional[str] = None
    provider_type: Optional[str] = None
    base_url: Optional[str] = None
    api_key: Optional[str] = None
    default_model: Optional[str] = None
    is_default: Optional[bool] = None
    enabled: Optional[bool] = None


@router.get("/", response_model=dict)
def list_providers(
    current_user: User = Depends(get_current_user)
):
    """Get user's LLM providers"""
    db = SessionLocal()
    try:
        providers = db.query(LLMProvider).filter(
            LLMProvider.user_id == current_user.id
        ).order_by(LLMProvider.is_default.desc(), LLMProvider.created_at.desc()).all()
        
        return success_response(data={
            "providers": [p.to_dict() for p in providers],
            "total": len(providers)
        })
    finally:
        db.close()


@router.post("/", response_model=dict)
def create_provider(
    provider: ProviderCreate,
    current_user: User = Depends(get_current_user)
):
    """Create a new LLM provider"""
    db = SessionLocal()
    try:
        # If this is set as default, unset other defaults
        if provider.is_default:
            db.query(LLMProvider).filter(
                LLMProvider.user_id == current_user.id
            ).update({"is_default": False})
        
        db_provider = LLMProvider(
            user_id=current_user.id,
            name=provider.name,
            provider_type=provider.provider_type,
            base_url=provider.base_url,
            api_key=provider.api_key,
            default_model=provider.default_model,
            is_default=provider.is_default
        )
        db.add(db_provider)
        db.commit()
        db.refresh(db_provider)
        
        return success_response(data=db_provider.to_dict(include_key=True))
    except Exception as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=str(e))
    finally:
        db.close()


@router.get("/{provider_id}", response_model=dict)
def get_provider(
    provider_id: int,
    current_user: User = Depends(get_current_user)
):
    """Get provider details"""
    db = SessionLocal()
    try:
        provider = db.query(LLMProvider).filter(
            LLMProvider.id == provider_id,
            LLMProvider.user_id == current_user.id
        ).first()
        
        if not provider:
            raise HTTPException(status_code=404, detail="Provider not found")
        
        return success_response(data=provider.to_dict(include_key=True))
    finally:
        db.close()


@router.put("/{provider_id}", response_model=dict)
def update_provider(
    provider_id: int,
    update: ProviderUpdate,
    current_user: User = Depends(get_current_user)
):
    """Update provider"""
    db = SessionLocal()
    try:
        provider = db.query(LLMProvider).filter(
            LLMProvider.id == provider_id,
            LLMProvider.user_id == current_user.id
        ).first()
        
        if not provider:
            raise HTTPException(status_code=404, detail="Provider not found")
        
        # If setting as default, unset others
        if update.is_default:
            db.query(LLMProvider).filter(
                LLMProvider.user_id == current_user.id,
                LLMProvider.id != provider_id
            ).update({"is_default": False})
        
        # Update fields
        update_data = update.dict(exclude_unset=True)
        # Keep existing API key if the new one is empty
        if update_data.get('api_key') == '':
            update_data.pop('api_key')
        for key, value in update_data.items():
            setattr(provider, key, value)
        
        db.commit()
        db.refresh(provider)
        
        return success_response(data=provider.to_dict(include_key=True))
    except HTTPException:
        raise
    except Exception as e:
        db.rollback()
        raise HTTPException(status_code=400, detail=str(e))
    finally:
        db.close()


@router.delete("/{provider_id}", response_model=dict)
def delete_provider(
    provider_id: int,
    current_user: User = Depends(get_current_user)
):
    """Delete provider"""
    db = SessionLocal()
    try:
        provider = db.query(LLMProvider).filter(
            LLMProvider.id == provider_id,
            LLMProvider.user_id == current_user.id
        ).first()
        
        if not provider:
            raise HTTPException(status_code=404, detail="Provider not found")
        
        db.delete(provider)
        db.commit()
        
        return success_response(message="Provider deleted")
    finally:
        db.close()


@router.post("/{provider_id}/test")
def test_provider(
    provider_id: int,
    current_user: User = Depends(get_current_user)
):
    """Test provider connection"""
    
    try:
        db = SessionLocal()
        try:
            provider = db.query(LLMProvider).filter(
                LLMProvider.id == provider_id,
                LLMProvider.user_id == current_user.id
            ).first()
            
            if not provider:
                return {"success": False, "message": "Provider not found"}
            
            # Test the connection
            async def test():
                async with httpx.AsyncClient(timeout=10.0) as client:
                    response = await client.post(
                        provider.base_url,
                        headers={
                            "Authorization": f"Bearer {provider.api_key}",
                            "Content-Type": "application/json"
                        },
                        json={
                            "model": provider.default_model,
                            "messages": [{"role": "system", "content": "You are a helpful assistant."}, {"role": "user", "content": "Hi"}],
                            "stream": False
                        }
                    )
                    response.raise_for_status()
                    return {
                        "status_code": response.status_code,
                        "success": True,
                        "response_body": response.text[:500] if response.text else None
                    }
            
            result = asyncio.run(test())
            return {
                "success": result.get("success", False),
                "message": result.get("message") or (f"HTTP {result.get('status_code', '?')}: {result.get('response_body') or 'Unknown error'}"),
                "data": result
            }
        finally:
            db.close()
    except Exception as e:
        return {"success": False, "message": f"Exception {str(e)}", "error_type": type(e).__name__, "traceback": traceback.format_exc()[:500]}