from flask import Blueprint, redirect, flash
from auth import require_level
from config_utils import (flush_pending_to_queue, get_dashboard_pending,
                          _is_locked, _format_timing, _seconds_until_next_run)

bp = Blueprint('action_apply_pending', __name__)


@bp.route('/action/apply_pending', methods=['POST'])
@require_level('administrator')
def apply_pending():
    items = get_dashboard_pending()
    if not items:
        flash('No pending changes to apply.', 'info')
        return redirect('/view/view_general')
    flush_pending_to_queue()
    if _is_locked():
        msg = 'Changes queued. They are being applied now.'
    else:
        timing = _format_timing(_seconds_until_next_run())
        if timing:
            msg = f'Changes queued. They will be applied {timing}.'
        else:
            msg = 'Changes queued. The processing service is not running.'
    flash(msg, 'success')
    return redirect('/view/view_general')