import os
import urllib.parse
from typing import Dict, Any
from dotenv import load_dotenv

load_dotenv()


class Settings:
    """配置管理器"""

    def __init__(self):
        self.HOST = os.getenv("HOST", "0.0.0.0")
        self.PORT = int(os.getenv("PORT", "8000"))
        self.DEBUG = os.getenv("DEBUG", "false").lower() == "true"

        self.UPLOAD_DIR = os.getenv("UPLOAD_DIR", "./uploads")
        self.MAX_FILE_SIZE = int(os.getenv("MAX_FILE_SIZE", "104857600"))
        self.ALLOWED_EXTENSIONS = os.getenv("ALLOWED_EXTENSIONS", ".stp,.step,.stp.gz")

        self.POINTCLOUD_SAMPLE_COUNT = int(os.getenv("POINTCLOUD_SAMPLE_COUNT", "10000"))
        self.MESH_QUALITY = os.getenv("MESH_QUALITY", "high")
        self.PARALLEL_PROCESSING = os.getenv("PARALLEL_PROCESSING", "true").lower() == "true"

        self.RUSTFS_ENDPOINT = os.getenv("RUSTFS_ENDPOINT") or os.getenv("MINIO_ENDPOINT") or "http://localhost:8080"
        self.RUSTFS_ACCESS_KEY = os.getenv("RUSTFS_ACCESS_KEY") or os.getenv("MINIO_ACCESS_KEY") or "your-access-key"
        self.RUSTFS_SECRET_KEY = os.getenv("RUSTFS_SECRET_KEY") or os.getenv("MINIO_SECRET_KEY") or "your-secret-key"
        self.RUSTFS_TIMEOUT = int(os.getenv("RUSTFS_TIMEOUT", "30"))
        self.RUSTFS_PRESIGNED_URL_EXPIRES = int(os.getenv("RUSTFS_PRESIGNED_URL_EXPIRES", "3600"))

        db_host = os.getenv("DB_HOST")
        db_port_str = os.getenv("DB_PORT")
        db_name = os.getenv("DB_NAME")
        db_user = os.getenv("DB_USER")
        db_password = os.getenv("DB_PASSWORD")

        missing_configs = []
        if not db_host:
            missing_configs.append("DB_HOST")
        if not db_port_str:
            missing_configs.append("DB_PORT")
        if not db_name:
            missing_configs.append("DB_NAME")
        if not db_user:
            missing_configs.append("DB_USER")
        if not db_password:
            missing_configs.append("DB_PASSWORD")

        if missing_configs:
            raise ValueError(f"数据库配置缺失，请在.env文件中设置: {', '.join(missing_configs)}")

        self.DB_HOST = db_host
        self.DB_PORT = int(db_port_str)
        self.DB_NAME = db_name
        self.DB_USER = db_user
        self.DB_PASSWORD = db_password

        self.SECRET_KEY = os.getenv("SECRET_KEY")
        self.ALGORITHM = os.getenv("ALGORITHM", "HS256")
        self.ACCESS_TOKEN_EXPIRE_MINUTES = int(os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES", "1440"))

        self.ADMIN_USERNAME = os.getenv("ADMIN_USERNAME", "admin")
        self.ADMIN_PASSWORD = os.getenv("ADMIN_PASSWORD")
        self.ADMIN_EMAIL = os.getenv("ADMIN_EMAIL", "admin@gemold.com")
        self.ADMIN_FULL_NAME = os.getenv("ADMIN_FULL_NAME", "系统管理员")

        self.ENABLE_FREECAD_VERIFICATION = os.getenv("ENABLE_FREECAD_VERIFICATION", "false").lower() == "true"
        self.FREECAD_VERIFICATION_TIMEOUT = int(os.getenv("FREECAD_VERIFICATION_TIMEOUT", "120"))
        self.PROCESSING_TIMEOUT_BASE = int(os.getenv("PROCESSING_TIMEOUT_BASE", "300"))
        self.PROCESSING_TIMEOUT_PER_MB = int(os.getenv("PROCESSING_TIMEOUT_PER_MB", "15"))

        # Redis
        self.REDIS_HOST = os.getenv("REDIS_HOST", "localhost")
        self.REDIS_PORT = int(os.getenv("REDIS_PORT", "6379"))
        self.REDIS_PASSWORD = os.getenv("REDIS_PASSWORD", "")
        self.REDIS_DB = int(os.getenv("REDIS_DB", "0"))

        # LLM 增强分析配置（可选）
        self.LLM_ENABLED = os.getenv("LLM_ENABLED", "false").lower() == "true"
        self.LLM_API_URL = os.getenv("LLM_API_URL", "https://api.openai.com/v1")
        self.LLM_API_KEY = os.getenv("LLM_API_KEY", "")
        self.LLM_MODEL = os.getenv("LLM_MODEL", "gpt-4o-mini")
        self.LLM_TIMEOUT = int(os.getenv("LLM_TIMEOUT", "60"))
        self.LLM_MAX_TOKENS = int(os.getenv("LLM_MAX_TOKENS", "2000"))

    @property
    def DATABASE_URL(self) -> str:
        if self.DB_PASSWORD:
            safe_password = urllib.parse.quote(self.DB_PASSWORD.encode("utf-8"), safe="")
        else:
            safe_password = ""
        return f"postgresql+asyncpg://{self.DB_USER}:{safe_password}@{self.DB_HOST}:{self.DB_PORT}/{self.DB_NAME}"

    @property
    def allowed_extensions_set(self) -> set:
        return set(ext.strip() for ext in self.ALLOWED_EXTENSIONS.split(","))


settings = Settings()