"""
🏆 Premium AI Provider Configuration System
Supports: OpenAI GPT-5, Google Gemini 3, Claude Sonnet 4.5, and 6 Free OpenRouter Models
"""
import os
from pathlib import Path
from typing import Optional, Dict
from enum import Enum
from dataclasses import dataclass
from dotenv import load_dotenv
import logging

logger = logging.getLogger(__name__)

# Load environment variables
load_dotenv()


class AIProvider(str, Enum):
    """Supported AI providers"""
    # ⭐ Premium Providers (Require API Keys)
    OPENAI = "openai"
    GOOGLE_GEMINI = "google"
    ANTHROPIC = "anthropic"
    
    # 🆓 Free OpenRouter Models
    GROK = "grok"
    KAT_CODER = "kat-coder"
    QWEN_CODER = "qwen-coder"
    LONGCAT = "longcat"
    GPT_OSS = "gpt-oss"
    KIMI = "kimi"


@dataclass
class ModelConfig:
    """Configuration for an AI model"""
    name: str
    display_name: str
    provider: AIProvider
    model_id: str
    is_premium: bool
    badge: str
    requires_api_key: bool


# 🎯 Available Models Configuration
AVAILABLE_MODELS: Dict[str, ModelConfig] = {
    # ⭐ Premium Models
    "gpt-5": ModelConfig(
        name="gpt-5",
        display_name="⭐ GPT-5 (OpenAI)",
        provider=AIProvider.OPENAI,
        model_id="gpt-5",
        is_premium=True,
        badge="⭐ PRO",
        requires_api_key=True
    ),
    "gemini-3": ModelConfig(
        name="gemini-3",
        display_name="⭐ Gemini 3 (Google)",
        provider=AIProvider.GOOGLE_GEMINI,
        model_id="gemini-3.0-pro",
        is_premium=True,
        badge="⭐ PRO",
        requires_api_key=True
    ),
    "claude-sonnet": ModelConfig(
        name="claude-sonnet",
        display_name="⭐ Claude Sonnet 4.5 (Anthropic)",
        provider=AIProvider.ANTHROPIC,
        model_id="claude-sonnet-4.5",
        is_premium=True,
        badge="⭐ PRO",
        requires_api_key=True
    ),
    
    # 🆓 Free OpenRouter Models
    "grok-4.1": ModelConfig(
        name="grok-4.1",
        display_name="🆓 Grok 4.1 Fast",
        provider=AIProvider.GROK,
        model_id="x-ai/grok-4.1-fast:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
    "kat-coder": ModelConfig(
        name="kat-coder",
        display_name="🆓 KAT-Coder-Pro V1",
        provider=AIProvider.KAT_CODER,
        model_id="kwaipilot/kat-coder-pro:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
    "qwen-coder": ModelConfig(
        name="qwen-coder",
        display_name="🆓 Qwen3 Coder",
        provider=AIProvider.QWEN_CODER,
        model_id="qwen/qwen3-coder:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
    "longcat": ModelConfig(
        name="longcat",
        display_name="🆓 LongCat Flash Chat",
        provider=AIProvider.LONGCAT,
        model_id="meituan/longcat-flash-chat:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
    "gpt-oss": ModelConfig(
        name="gpt-oss",
        display_name="🆓 GPT-OSS 20B",
        provider=AIProvider.GPT_OSS,
        model_id="openai/gpt-oss-20b:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
    "kimi": ModelConfig(
        name="kimi",
        display_name="🆓 Kimi K2",
        provider=AIProvider.KIMI,
        model_id="moonshotai/kimi-k2:free",
        is_premium=False,
        badge="🆓 FREE",
        requires_api_key=False
    ),
}


class Config:
    """🏆 Premium Application Configuration"""
    
    # API Keys
    GOOGLE_API_KEY: str = os.getenv("GOOGLE_API_KEY", "")
    OPENAI_API_KEY: str = os.getenv("OPENAI_API_KEY", "")
    ANTHROPIC_API_KEY: str = os.getenv("ANTHROPIC_API_KEY", "")
    OPENROUTER_API_KEY: str = os.getenv(
        "OPENROUTER_API_KEY",
        "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"
    )
    
    # Default model
    DEFAULT_MODEL: str = os.getenv("DEFAULT_MODEL", "grok-4.1")
    
    # AI settings
    MAX_TOKENS: int = int(os.getenv("MAX_TOKENS", "4096"))
    TEMPERATURE: float = float(os.getenv("TEMPERATURE", "0.7"))
    
    # Server settings
    LOG_LEVEL: str = os.getenv("LOG_LEVEL", "INFO")
    
    # Cache settings
    CACHE_MAX_SIZE: int = int(os.getenv("CACHE_MAX_SIZE", "1000"))
    
    # Rate limiting
    RATE_LIMIT_PER_MINUTE: int = int(os.getenv("RATE_LIMIT_PER_MINUTE", "60"))
    
    # Project paths
    PROJECT_ROOT: Path = Path(__file__).parent.parent
    RESOURCES_DIR: Path = PROJECT_ROOT / "src" / "resources" / "static"
    
    @classmethod
    def get_model_config(cls, model_name: str) -> Optional[ModelConfig]:
        """Get configuration for a specific model"""
        return AVAILABLE_MODELS.get(model_name)
    
    @classmethod
    def get_available_models(cls) -> Dict[str, ModelConfig]:
        """Get all available models"""
        return AVAILABLE_MODELS
    
    @classmethod
    def get_dropdown_options(cls) -> list:
        """Get formatted options for UI dropdown"""
        options = []
        
        # Premium models first
        for model_id, config in AVAILABLE_MODELS.items():
            if config.is_premium:
                options.append(config.display_name)
        
        # Then free models
        for model_id, config in AVAILABLE_MODELS.items():
            if not config.is_premium:
                options.append(config.display_name)
        
        return options
    
    @classmethod
    def get_model_by_display_name(cls, display_name: str) -> Optional[str]:
        """Get model key from display name"""
        for model_id, config in AVAILABLE_MODELS.items():
            if config.display_name == display_name:
                return model_id
        return None
    
    @classmethod
    def validate_api_key(cls, model_name: str, api_key: Optional[str] = None) -> bool:
        """Validate if required API key is available"""
        model_config = cls.get_model_config(model_name)
        if not model_config:
            return False
        
        # Free OpenRouter models don't need user API key
        if not model_config.requires_api_key:
            return True
        
        # Premium models need specific API keys
        if model_config.provider == AIProvider.OPENAI:
            return bool(api_key or cls.OPENAI_API_KEY)
        elif model_config.provider == AIProvider.GOOGLE_GEMINI:
            return bool(api_key or cls.GOOGLE_API_KEY)
        elif model_config.provider == AIProvider.ANTHROPIC:
            return bool(api_key or cls.ANTHROPIC_API_KEY)
        
        return False
    
    @classmethod
    def validate(cls) -> bool:
        """Validate configuration"""
        # At least OpenRouter should work
        return bool(cls.OPENROUTER_API_KEY)
    
    @classmethod
    def get_config_file(cls, path: Optional[str] = None) -> Optional[Path]:
        """Get configuration file path"""
        if path:
            return Path(path)
        
        # Check for .codelintrc.json in current directory
        config_path = Path.cwd() / ".codelintrc.json"
        if config_path.exists():
            return config_path
        
        return None

# Validate configuration on import
Config.validate()