#!/usr/bin/env python3
"""Validate the OpenRouter setup in the backend."""

import json
import os
import sys
from pathlib import Path

from dotenv import load_dotenv

# Load environment variables
load_dotenv()


def check_env_variables():
    """Check that required environment variables are set."""
    print("=" * 60)
    print("Checking Environment Variables")
    print("=" * 60)
    
    required = ["OPENROUTER_API_KEY", "HF_TOKEN"]
    optional = ["OPENROUTER_MODEL", "OPENROUTER_REFERER", "OPENROUTER_APP_TITLE"]
    
    all_good = True
    
    for var in required:
        value = os.environ.get(var)
        if value:
            masked = value[:20] + "..." if len(value) > 20 else value
            print(f"✅ {var}: {masked}")
        else:
            print(f"❌ {var}: NOT SET (Required)")
            all_good = False
    
    for var in optional:
        value = os.environ.get(var)
        if value:
            print(f"✅ {var}: {value}")
        else:
            print(f"⚠️  {var}: Not set (Optional)")
    
    return all_good


def check_config_file():
    """Check that the config file is properly configured."""
    print("\n" + "=" * 60)
    print("Checking Config File")
    print("=" * 60)
    
    config_path = Path(__file__).parent / "configs" / "main_agent_config.json"
    
    if not config_path.exists():
        print(f"❌ Config file not found: {config_path}")
        return False
    
    try:
        with open(config_path) as f:
            config = json.load(f)
        
        print(f"✅ Config file loaded: {config_path}")
        
        # Check key fields
        checks = [
            ("model_name", config.get("model_name")),
            ("openrouter_enabled", config.get("openrouter_enabled")),
            ("openrouter_model", config.get("openrouter_model")),
        ]
        
        for key, value in checks:
            if value:
                print(f"✅ {key}: {value}")
            else:
                print(f"⚠️  {key}: Not set")
        
        # Verify OpenRouter is enabled
        if config.get("openrouter_enabled"):
            print("\n✅ OpenRouter is ENABLED in config")
        else:
            print("\n⚠️  OpenRouter is NOT enabled in config")
        
        return True
        
    except json.JSONDecodeError as e:
        print(f"❌ Invalid JSON in config file: {e}")
        return False
    except Exception as e:
        print(f"❌ Error reading config: {e}")
        return False


def check_agent_loop():
    """Check that agent_loop.py has the OpenRouter fixes."""
    print("\n" + "=" * 60)
    print("Checking Agent Loop (OpenRouter Integration)")
    print("=" * 60)
    
    agent_loop_path = Path(__file__).parent / "agent" / "core" / "agent_loop.py"
    
    if not agent_loop_path.exists():
        print(f"❌ agent_loop.py not found: {agent_loop_path}")
        return False
    
    with open(agent_loop_path) as f:
        content = f.read()
    
    checks = [
        ("api_base_to_use", "api_base parameter"),
        ("extra_headers", "extra_headers parameter"),
        ("https://openrouter.ai/api/v1", "OpenRouter API base URL"),
        ("HTTP-Referer", "HTTP-Referer header"),
        ("X-Title", "X-Title header"),
    ]
    
    all_good = True
    for keyword, description in checks:
        if keyword in content:
            print(f"✅ {description}: Found")
        else:
            print(f"❌ {description}: NOT found")
            all_good = False
    
    return all_good


def check_routes():
    """Check that routes/agent.py has the OpenRouter fixes."""
    print("\n" + "=" * 60)
    print("Checking Routes (OpenRouter Integration)")
    print("=" * 60)
    
    routes_path = Path(__file__).parent / "routes" / "agent.py"
    
    if not routes_path.exists():
        print(f"❌ agent.py not found: {routes_path}")
        return False
    
    with open(routes_path) as f:
        content = f.read()
    
    checks = [
        ("llm_health_check", "Health check endpoint"),
        ("generate_title", "Title generation endpoint"),
        ("api_base", "api_base in routes"),
        ("openrouter_enabled", "openrouter_enabled check"),
    ]
    
    all_good = True
    for keyword, description in checks:
        if keyword in content:
            print(f"✅ {description}: Found")
        else:
            print(f"❌ {description}: NOT found")
            all_good = False
    
    return all_good


def main():
    """Run all validation checks."""
    print("=" * 60)
    print("OpenRouter Setup Validation")
    print("=" * 60)
    
    results = []
    
    results.append(("Environment Variables", check_env_variables()))
    results.append(("Config File", check_config_file()))
    results.append(("Agent Loop", check_agent_loop()))
    results.append(("Routes", check_routes()))
    
    print("\n" + "=" * 60)
    print("Validation Summary")
    print("=" * 60)
    
    for name, passed in results:
        status = "✅ PASS" if passed else "❌ FAIL"
        print(f"{name}: {status}")
    
    all_passed = all(r[1] for r in results)
    
    if all_passed:
        print("\n🎉 All validation checks passed!")
        print("The backend is configured correctly for OpenRouter.")
        return 0
    else:
        print("\n⚠️ Some validation checks failed.")
        print("Please review the errors above and fix the issues.")
        return 1


if __name__ == "__main__":
    sys.exit(main())