"""Creación automática de config/ y carpetas de trabajo."""

import shutil
import sys
from pathlib import Path

from ..constants import (
    APP_DIR,
    BUNDLE_DIR,
    BUNDLED_SOURCE_7ZIP,
    BUNDLED_SOURCE_ODBC,
    CONFIG_DIR,
    DATA_DIR,
    DIR_ENTRADA,
    DIR_FALLADOS,
    DIR_PROCESADOS,
    DIR_TEMP,
    ENV_PATH,
    LOGS_DIR,
    ODBC_DIR,
    SEVEN_ZIP_DIR,
)
from ..db.database import DatabaseManager
from .env_loader import render_env_template


def _copy_tree_if_missing(src: Path, dest: Path) -> None:
    if not src.is_dir() or dest.exists():
        return
    dest.parent.mkdir(parents=True, exist_ok=True)
    shutil.copytree(src, dest)


def _write_env_if_missing() -> None:
    if ENV_PATH.exists():
        return
    template_path = BUNDLE_DIR / "packaging" / "templates" / "env.default"
    if not template_path.is_file():
        template_path = APP_DIR / "packaging" / "templates" / "env.default"
    if template_path.is_file():
        content = template_path.read_text(encoding="utf-8")
        content = content.replace("{APP_DIR}", str(APP_DIR))
    else:
        content = render_env_template(APP_DIR)
    ENV_PATH.write_text(content, encoding="utf-8")
    try:
        ENV_PATH.chmod(0o600)
    except OSError:
        pass


def ensure_runtime_layout() -> None:
    """
    Idempotente: crea config/, carpetas de trabajo y .env si no existen.
    No sobrescribe .env ni app.db existentes.
    """
    for directory in (
        CONFIG_DIR,
        DATA_DIR,
        LOGS_DIR,
        ODBC_DIR,
        SEVEN_ZIP_DIR,
        DIR_ENTRADA,
        DIR_PROCESADOS,
        DIR_FALLADOS,
        DIR_TEMP,
    ):
        directory.mkdir(parents=True, exist_ok=True)

    _write_env_if_missing()

    _copy_tree_if_missing(BUNDLED_SOURCE_7ZIP, SEVEN_ZIP_DIR)
    _copy_tree_if_missing(BUNDLED_SOURCE_ODBC, ODBC_DIR)

    from ..constants import DB_PATH

    if not DB_PATH.exists():
        DatabaseManager(DB_PATH)

    if getattr(sys, "frozen", False):
        marker = CONFIG_DIR / ".bootstrap_ok"
        if not marker.exists():
            marker.write_text("ok", encoding="utf-8")