"""
AZA Runtime-Konfiguration fuer den OpenAI API Key.
Laedt den Key sicher aus Prozessumgebung oder lokaler Konfigurationsdatei.
Gibt niemals den Key-Wert in Logs oder Fehlermeldungen aus.
"""

import os
import sys
from pathlib import Path

_CONFIG_DIR_NAME = "config"
_CONFIG_FILE_NAME = "aza_runtime.env"

_TEMPLATE_CONTENT = """\
# AZA Runtime-Konfiguration
# Tragen Sie hier Ihren OpenAI API-Schluessel ein.
# Diese Datei wird bei Updates NICHT ueberschrieben.
#
# Beispiel:
# OPENAI_API_KEY=sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
#
OPENAI_API_KEY=
"""


def get_runtime_base_dir() -> str:
    if getattr(sys, "frozen", False):
        return str(Path(sys.executable).resolve().parent)
    return str(Path(__file__).resolve().parent)


def get_runtime_config_dir() -> str:
    return str(Path(get_runtime_base_dir()) / _CONFIG_DIR_NAME)


def get_runtime_env_file_path() -> str:
    return str(Path(get_runtime_config_dir()) / _CONFIG_FILE_NAME)


def _parse_env_file(path: str) -> dict:
    result = {}
    try:
        with open(path, "r", encoding="utf-8") as f:
            for line in f:
                line = line.strip()
                if not line or line.startswith("#"):
                    continue
                if "=" not in line:
                    continue
                key, _, value = line.partition("=")
                key = key.strip()
                value = value.strip()
                if len(value) >= 2 and value[0] == value[-1] and value[0] in ('"', "'"):
                    value = value[1:-1]
                if key:
                    result[key] = value
    except Exception:
        pass
    return result


def get_openai_api_key():
    """Liefert den OpenAI API Key oder None. Prueft Umgebung, dann lokale Config."""
    val = os.environ.get("OPENAI_API_KEY", "").strip()
    if val:
        return val
    env_path = get_runtime_env_file_path()
    parsed = _parse_env_file(env_path)
    val = parsed.get("OPENAI_API_KEY", "").strip()
    if val:
        return val
    return None


def has_openai_api_key() -> bool:
    return get_openai_api_key() is not None


def is_openai_configured() -> bool:
    return has_openai_api_key()


def ensure_runtime_config_template_exists() -> str:
    """Erstellt config-Ordner und Template-Datei, falls nicht vorhanden. Ueberschreibt nie."""
    config_dir = Path(get_runtime_config_dir())
    env_file = config_dir / _CONFIG_FILE_NAME
    try:
        config_dir.mkdir(parents=True, exist_ok=True)
    except Exception:
        pass
    if not env_file.exists():
        try:
            env_file.write_text(_TEMPLATE_CONTENT, encoding="utf-8")
        except Exception:
            pass
    return str(env_file)


def open_runtime_config_in_editor():
    """Oeffnet die Runtime-Config im Standard-Texteditor (nur Windows)."""
    path = ensure_runtime_config_template_exists()
    try:
        if os.name == "nt":
            os.startfile(path)
    except Exception:
        pass