"""Configuration management for ClaudeTools Discord Bot."""
from pathlib import Path
from typing import Optional

from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """Bot configuration from environment variables."""

    # Discord
    discord_token: str = Field(..., description="Discord bot token")
    discord_guild_id: Optional[int] = Field(None, description="Discord guild/server ID")

    # Anthropic Claude API
    anthropic_api_key: str = Field(..., description="Anthropic API key")
    claude_model: str = Field(
        default="claude-sonnet-4-5-20250929",
        description="Claude model to use"
    )

    # ClaudeTools API
    claudetools_api_url: str = Field(
        default="http://172.16.3.30:8001",
        description="ClaudeTools API base URL"
    )
    claudetools_api_key: str = Field(..., description="ClaudeTools API key")

    # File Paths
    vault_path: Path = Field(
        default=Path("D:/vault"),
        description="Path to SOPS vault"
    )
    claudetools_root: Path = Field(
        default=Path("D:/claudetools"),
        description="Path to ClaudeTools repository"
    )

    # Git Bash (for remediation scripts on Windows)
    git_bash_path: Path = Field(
        default=Path("C:/Program Files/Git/bin/bash.exe"),
        description="Path to Git Bash executable"
    )

    # Logging
    log_level: str = Field(default="INFO", description="Logging level")
    log_file: Optional[Path] = Field(
        default=Path("logs/bot.log"),
        description="Log file path"
    )

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=False,
        extra="ignore"
    )

    def validate_paths(self) -> None:
        """Validate that required paths exist."""
        if not self.git_bash_path.exists():
            raise FileNotFoundError(
                f"Git Bash not found at {self.git_bash_path}. "
                "Set GIT_BASH_PATH environment variable."
            )

        if not self.vault_path.exists():
            raise FileNotFoundError(
                f"Vault not found at {self.vault_path}. "
                "Set VAULT_PATH environment variable."
            )

        if not self.claudetools_root.exists():
            raise FileNotFoundError(
                f"ClaudeTools not found at {self.claudetools_root}. "
                "Set CLAUDETOOLS_ROOT environment variable."
            )


# Global settings instance
settings = Settings()