from flask import Blueprint, request, redirect, flash
from auth import require_level
from config_utils import load_core, save_core
import sanitize
import validation as validate

bp = Blueprint('action_apply_ddns_providers', __name__)

VIEW = '/view/view_ddns'


@bp.route('/action/add_ddns_provider', methods=['POST'])
@require_level('administrator')
def add_ddns_provider():
    provider_type = sanitize.filtervalue(request.form.get('provider', ''), validate.VALID_DDNS_PROVIDERS)
    description   = sanitize.description(request.form.get('description', ''))
    hostnames     = sanitize.domainlist(request.form.get('hostnames', '').splitlines())

    if not description:
        flash('Description is required.', 'error')
        return redirect(VIEW)
    if not hostnames:
        flash('At least one hostname is required.', 'error')
        return redirect(VIEW)
    if not provider_type:
        flash('Unknown provider type.', 'error')
        return redirect(VIEW)

    entry = {
        'description': description,
        'provider':    provider_type,
        'enabled':     True,
        'hostnames':   hostnames,
    }
    if provider_type == 'noip':
        entry['username'] = request.form.get('username', '').strip()
        entry['password'] = request.form.get('password', '').strip()
    else:
        entry['api_token'] = request.form.get('api_token', '').strip()

    core = load_core()
    core.setdefault('ddns', {}).setdefault('providers', []).append(entry)
    save_core(core)
    flash(f'DDNS provider "{description}" added.', 'success')
    return redirect(VIEW)


@bp.route('/action/edit_ddns_provider', methods=['POST'])
@require_level('administrator')
def edit_ddns_provider():
    try:
        row_index = int(request.form.get('row_index', -1))
    except (TypeError, ValueError):
        flash('Invalid row index.', 'error')
        return redirect(VIEW)

    provider_type = sanitize.filtervalue(request.form.get('provider', ''), validate.VALID_DDNS_PROVIDERS)
    description   = sanitize.description(request.form.get('description', ''))
    hostnames     = [h.strip() for h in request.form.get('hostnames', '').splitlines() if h.strip()]
    enabled       = request.form.get('enabled') == 'on'

    if not provider_type:
        flash('Unknown provider type.', 'error')
        return redirect(VIEW)

    core      = load_core()
    providers = core.setdefault('ddns', {}).setdefault('providers', [])
    if row_index < 0 or row_index >= len(providers):
        flash('Invalid provider index.', 'error')
        return redirect(VIEW)

    entry = {
        'description': description,
        'provider':    provider_type,
        'enabled':     enabled,
        'hostnames':   hostnames,
    }
    if provider_type == 'noip':
        entry['username'] = request.form.get('username', '').strip()
        entry['password'] = request.form.get('password', '').strip()
    else:
        entry['api_token'] = request.form.get('api_token', '').strip()

    providers[row_index] = entry
    save_core(core)
    flash('DDNS provider updated.', 'success')
    return redirect(VIEW)


@bp.route('/action/delete_ddns_provider', methods=['POST'])
@require_level('administrator')
def delete_ddns_provider():
    try:
        row_index = int(request.form.get('row_index', -1))
    except (TypeError, ValueError):
        flash('Invalid row index.', 'error')
        return redirect(VIEW)

    core      = load_core()
    providers = core.setdefault('ddns', {}).setdefault('providers', [])
    if row_index < 0 or row_index >= len(providers):
        flash('Invalid provider index.', 'error')
        return redirect(VIEW)

    del providers[row_index]
    save_core(core)
    flash('DDNS provider deleted.', 'success')
    return redirect(VIEW)