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"""
μ•± μ„€μ • 파일
"""

import os
from dataclasses import dataclass
from typing import Dict


@dataclass
class AppConfig:
    """μ•± μ„€μ • 클래슀"""
    
    # μ•± 정보
    app_name: str = "μŒμ„± 검증 μ‹œμŠ€ν…œ"
    version: str = "1.0.0"
    
    # STT μ„€μ •
    stt_provider: str = os.getenv('STT_PROVIDER', 'mock')  # 'openai', 'google', 'azure', 'mock'
    
    # OpenAI μ„€μ •
    openai_api_key: str = os.getenv('OPENAI_API_KEY', '')
    openai_model: str = "whisper-1"
    
    # Google μ„€μ •
    google_credentials_path: str = os.getenv('GOOGLE_APPLICATION_CREDENTIALS', '')
    
    # Azure μ„€μ •
    azure_speech_key: str = os.getenv('AZURE_SPEECH_KEY', '')
    azure_speech_region: str = os.getenv('AZURE_SPEECH_REGION', 'koreacentral')
    
    # λ‚œμ΄λ„ μ„€μ •
    min_difficulty: int = 1
    max_difficulty: int = 5
    default_difficulty: int = 1
    
    # μœ μ‚¬λ„ μž„κ³„κ°’ (λ‚œμ΄λ„λ³„)
    similarity_thresholds: Dict[int, float] = None
    
    # UI μ„€μ •
    theme: str = "soft"
    primary_color: str = "indigo"
    
    # μ„œλ²„ μ„€μ •
    server_name: str = os.getenv("SERVER_HOST")
    server_port: int = os.getenv("FRONTEND_PORT")
    share: bool = False

    # λ°±μ—”λ“œ μ„€μ •
    backend_port: int = os.getenv("BACKEND_PORT")
    backend_api_url: str = os.getenv("BACKEND_API_URL", "")
    
    # 파일 μ„€μ •
    max_audio_duration: int = 30  # 초
    allowed_audio_formats: list = None
    
    def __post_init__(self):
        """μ΄ˆκΈ°ν™” ν›„ 처리"""
        
        # κΈ°λ³Έ μž„κ³„κ°’ μ„€μ •
        if self.similarity_thresholds is None:
            self.similarity_thresholds = {
                1: 0.70,
                2: 0.75,
                3: 0.80,
                4: 0.85,
                5: 0.90
            }
        
        # ν—ˆμš© μ˜€λ””μ˜€ 포맷 μ„€μ •
        if self.allowed_audio_formats is None:
            self.allowed_audio_formats = [
                '.wav', '.mp3', '.m4a', '.ogg', '.flac', '.webm'
            ]
    
    @classmethod
    def from_env(cls):
        """
        ν™˜κ²½ λ³€μˆ˜μ—μ„œ μ„€μ • λ‘œλ“œ

        Returns:
            AppConfig: μ„€μ • μΈμŠ€ν„΄μŠ€
        """
        backend_port = os.getenv('BACKEND_PORT')
        return cls(
            stt_provider=os.getenv('STT_PROVIDER', 'mock'),
            openai_api_key=os.getenv('OPENAI_API_KEY', ''),
            server_name=os.getenv('SERVER_HOST'),
            server_port=int(os.getenv('FRONTEND_PORT')),
            backend_port=int(backend_port),
            backend_api_url=os.getenv('BACKEND_API_URL', f'http://localhost:{backend_port}'),
            share=os.getenv('GRADIO_SHARE', 'false').lower() == 'true'
        )
    
    def validate(self) -> bool:
        """
        μ„€μ • 검증
        
        Returns:
            bool: 유효 μ—¬λΆ€
        
        Raises:
            ValueError: 섀정이 μœ νš¨ν•˜μ§€ μ•Šμ„ λ•Œ
        """
        # STT provider별 검증
        if self.stt_provider == 'openai':
            if not self.openai_api_key:
                raise ValueError("OpenAI API ν‚€κ°€ μ„€μ •λ˜μ§€ μ•Šμ•˜μŠ΅λ‹ˆλ‹€")
        
        elif self.stt_provider == 'google':
            if not self.google_credentials_path:
                raise ValueError("Google 인증 파일 κ²½λ‘œκ°€ μ„€μ •λ˜μ§€ μ•Šμ•˜μŠ΅λ‹ˆλ‹€")
        
        elif self.stt_provider == 'azure':
            if not self.azure_speech_key:
                raise ValueError("Azure Speech ν‚€κ°€ μ„€μ •λ˜μ§€ μ•Šμ•˜μŠ΅λ‹ˆλ‹€")
        
        # λ‚œμ΄λ„ λ²”μœ„ 검증
        if not (1 <= self.min_difficulty <= self.max_difficulty <= 5):
            raise ValueError("λ‚œμ΄λ„ λ²”μœ„κ°€ μ˜¬λ°”λ₯΄μ§€ μ•ŠμŠ΅λ‹ˆλ‹€")
        
        return True
    
    def to_dict(self) -> dict:
        """
        λ”•μ…”λ„ˆλ¦¬λ‘œ λ³€ν™˜
        
        Returns:
            dict: μ„€μ • λ”•μ…”λ„ˆλ¦¬
        """
        return {
            'app_name': self.app_name,
            'version': self.version,
            'stt_provider': self.stt_provider,
            'difficulty_range': f"{self.min_difficulty}-{self.max_difficulty}",
            'server': f"{self.server_name}:{self.server_port}"
        }
    
    def __str__(self) -> str:
        """λ¬Έμžμ—΄ ν‘œν˜„"""
        config_dict = self.to_dict()
        lines = [f"{k}: {v}" for k, v in config_dict.items()]
        return "\n".join(lines)