"""
Sovereign Orchestrator - Configuration Module

Loads application configuration from environment variables and
the ~/.proxmox-credentials file.
"""

import os
import logging
from pathlib import Path
from dataclasses import dataclass, field

logger = logging.getLogger(__name__)

_CREDENTIALS_PATH = Path.home() / ".proxmox-credentials"


def _load_credentials_file() -> dict[str, str]:
    """Parse the ~/.proxmox-credentials file into a dict of key=value pairs."""
    creds: dict[str, str] = {}
    if not _CREDENTIALS_PATH.exists():
        logger.warning("Credentials file not found at %s", _CREDENTIALS_PATH)
        return creds
    try:
        for line in _CREDENTIALS_PATH.read_text().splitlines():
            line = line.strip()
            if not line or line.startswith("#"):
                continue
            if "=" in line:
                key, _, value = line.partition("=")
                creds[key.strip()] = value.strip()
    except OSError as exc:
        logger.error("Failed to read credentials file: %s", exc)
    return creds


_creds = _load_credentials_file()


@dataclass(frozen=True)
class Settings:
    """Application settings with env-var overrides."""

    # Proxmox connection
    proxmox_host: str = os.getenv(
        "PROXMOX_HOST", _creds.get("PROXMOX_HOST", "https://localhost:8006")
    )
    proxmox_token_id: str = os.getenv(
        "PROXMOX_TOKEN_ID", _creds.get("PROXMOX_TOKEN_ID", "")
    )
    proxmox_token_secret: str = os.getenv(
        "PROXMOX_TOKEN_SECRET", _creds.get("PROXMOX_TOKEN_SECRET", "")
    )

    # Storage paths
    iso_storage_path: str = os.getenv(
        "ISO_STORAGE_PATH", "/var/lib/vz/template/iso"
    )
    build_output_path: str = os.getenv(
        "BUILD_OUTPUT_PATH", "/tmp/sovereign-orchestrator/builds"
    )

    # Defaults
    default_node: str = os.getenv("DEFAULT_NODE", "dl380-0")
    default_vmid: int = int(os.getenv("DEFAULT_VMID", "900"))
    default_storage: str = os.getenv("DEFAULT_STORAGE", "local")

    # App
    app_host: str = os.getenv("APP_HOST", "0.0.0.0")
    app_port: int = int(os.getenv("APP_PORT", "8888"))

    # Reference answers.toml template
    answers_template_path: str = os.getenv(
        "ANSWERS_TEMPLATE_PATH",
        "/home/william/dev/theta42/proxmox-appliance-automation/files/answers.toml",
    )


settings = Settings()