import copy
from pathlib import Path
from flask import Blueprint, request, redirect, flash
from auth import require_level
from config_utils import CONFIGS_DIR, load_config, record_group, diff_fields

_PAGE = Path(__file__).parent.name

bp = Blueprint(_PAGE, __name__)

RADIUS_SECRET_FILE = Path(CONFIGS_DIR) / '.radius-secret'

_VALID_MAC_FORMATS = {
    'aabbccddeeff', 'aa-bb-cc-dd-ee-ff', 'aa:bb:cc:dd:ee:ff',
    'AABBCCDDEEFF', 'AA-BB-CC-DD-EE-FF', 'AA:BB:CC:DD:EE:FF',
}


@bp.route('/action/radius/regenerate', methods=['POST'])
@require_level('administrator')
def regenerate():
    try:
        RADIUS_SECRET_FILE.unlink(missing_ok=True)
    except OSError as ex:
        flash(f'Could not delete .radius-secret: {ex}', 'error')
        return redirect(f'/{_PAGE}')
    flash('Secret deleted. A new secret will be generated when the pending command is applied.', 'success')
    return redirect(f'/{_PAGE}')


@bp.route('/action/radius/options_save', methods=['POST'])
@require_level('administrator')
def options_save():
    mac_format = request.form.get('mac_format', 'aabbccddeeff')
    apply_to   = request.form.get('apply_to', 'all')
    logging    = 'logging' in request.form

    if mac_format not in _VALID_MAC_FORMATS:
        flash('Invalid MAC format.', 'error')
        return redirect(f'/{_PAGE}')
    if apply_to not in ('all', 'wireless'):
        flash('Invalid apply_to value.', 'error')
        return redirect(f'/{_PAGE}')

    cfg    = load_config()
    before = copy.deepcopy(cfg.get('radius_options', {}))
    after  = {'mac_format': mac_format, 'apply_to': apply_to, 'logging': logging}
    cfg['radius_options'] = after

    changes = diff_fields(before, after)
    flash(record_group(cfg, 'radius_options', 'setting', 'radius_options', changes, 'core apply'), 'success')
    return redirect(f'/{_PAGE}')