"""
Providers API
Endpoints for provider registry and status
"""

from fastapi import APIRouter, HTTPException, Query
from fastapi.responses import JSONResponse
from typing import Optional, Dict, Any
from datetime import datetime, timezone
import logging

from backend.services.provider_registry_service import get_registry_service
from backend.services.registry_loader import get_registry_loader
from backend.services.provider_fallback_manager import fallback_manager

logger = logging.getLogger(__name__)

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

registry_service = get_registry_service()
registry_loader = get_registry_loader()


@router.get("")
async def get_providers(
    show_sources: bool = Query(False, description="Show source file information"),
    category: Optional[str] = Query(None, description="Filter by category")
):
    """
    Get list of all providers
    Built from /mnt/data/all_apis_merged_2025.json and /mnt/data/api-config-complete.txt
    """
    # Get providers from registry loader (parsed from all_apis_merged_2025.json)
    providers = registry_loader.providers
    
    # Also get from registry service (merged sources)
    registry = registry_service.build_registry()
    registry_providers = registry.get("providers", [])
    
    # Merge both sources (deduplicate by base_url)
    seen_urls = set()
    all_providers = []
    
    # Add from registry_loader first
    for provider in providers:
        url_key = provider.get("base_url", "").lower().rstrip("/")
        if url_key and url_key not in seen_urls:
            seen_urls.add(url_key)
            all_providers.append(provider)
    
    # Add from registry_service
    for provider in registry_providers:
        url_key = provider.get("base_url", "").lower().rstrip("/")
        if url_key and url_key not in seen_urls:
            seen_urls.add(url_key)
            all_providers.append(provider)
    
    # Filter by category if specified
    if category:
        all_providers = [
            p for p in all_providers
            if category in p.get("categories", []) or p.get("category") == category
        ]
    
    # Remove API keys and secrets
    safe_providers = []
    for provider in all_providers:
        safe_provider = {
            "name": provider.get("name", "unknown"),
            "base_url": provider.get("base_url", ""),
            "category": provider.get("category", "generic"),
            "categories": provider.get("categories", [provider.get("category", "generic")]),
            "endpoints": provider.get("endpoints", {}),
            "free": provider.get("free", False),
            "priority": provider.get("priority", 10),
            "docs_url": provider.get("docs_url"),
            "has_api_key": bool(provider.get("api_key") or provider.get("auth_value")),
            "key_inline": bool(provider.get("auth_value"))
        }
        
        if show_sources:
            safe_provider["source_file"] = provider.get("source_file", "/mnt/data/all_apis_merged_2025.json")
            safe_provider["notes"] = provider.get("notes")
        
        safe_providers.append(safe_provider)
    
    return {
        "data": safe_providers,
        "meta": {
            "source": "registry",
            "generated_at": datetime.now(timezone.utc).isoformat(),
            "total_count": len(safe_providers),
            "free_count": sum(1 for p in safe_providers if p["free"]),
            "categories": list(set(
                cat for p in safe_providers 
                for cat in p.get("categories", [p.get("category", "generic")])
            )),
            "registry_files": [
                "/mnt/data/all_apis_merged_2025.json",
                "/mnt/data/api-config-complete.txt"
            ]
        }
    }


@router.get("/status")
async def get_providers_status():
    """Get status of all providers (circuit breakers, health, etc.)"""
    status = fallback_manager.get_provider_status()
    
    return {
        "data": status,
        "meta": {
            "source": "fallback_manager",
            "generated_at": datetime.now(timezone.utc).isoformat()
        }
    }


@router.get("/health")
async def get_providers_health():
    """Get health check for all providers"""
    status = fallback_manager.get_provider_status()
    
    healthy = sum(1 for p in status["providers"] if p["is_available"])
    total = status["total_providers"]
    
    return {
        "data": {
            "healthy": healthy,
            "total": total,
            "health_percentage": (healthy / total * 100) if total > 0 else 0,
            "providers": status["providers"]
        },
        "meta": {
            "source": "fallback_manager",
            "generated_at": datetime.now(timezone.utc).isoformat()
        }
    }