from flask import Blueprint, request, redirect, flash
from auth import require_level
import json
import sanitize
import validation as validate

bp = Blueprint('action_apply_ddns_providers', __name__)

DDNS_FILE = '/configs/ddns.json'


@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/view_ddns')
    if not hostnames:
        flash('At least one hostname is required.', 'error')
        return redirect('/view/view_ddns')
    if not provider_type:
        flash('Unknown provider type.', 'error')
        return redirect('/view/view_ddns')

    try:
        with open(DDNS_FILE) as f:
            data = json.load(f)
    except Exception as ex:
        flash(f'Could not read config: {ex}', 'error')
        return redirect('/view/view_ddns')

    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()

    data.setdefault('providers', []).append(entry)

    try:
        with open(DDNS_FILE, 'w') as f:
            json.dump(data, f, indent=2)
        flash(f'DDNS provider "{description}" added.', 'success')
    except Exception as ex:
        flash(f'Could not save config: {ex}', 'error')
    return redirect('/view/view_ddns')


@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/view_ddns')

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

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

    try:
        with open(DDNS_FILE) as f:
            data = json.load(f)
    except Exception as ex:
        flash(f'Could not read config: {ex}', 'error')
        return redirect('/view/view_ddns')

    providers = data.get('providers', [])
    if row_index < 0 or row_index >= len(providers):
        flash('Invalid provider index.', 'error')
        return redirect('/view/view_ddns')

    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
    data['providers'] = providers

    try:
        with open(DDNS_FILE, 'w') as f:
            json.dump(data, f, indent=2)
        flash('DDNS provider updated.', 'success')
    except Exception as ex:
        flash(f'Could not save config: {ex}', 'error')
    return redirect('/view/view_ddns')


@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/view_ddns')

    try:
        with open(DDNS_FILE) as f:
            data = json.load(f)
    except Exception as ex:
        flash(f'Could not read config: {ex}', 'error')
        return redirect('/view/view_ddns')

    providers = data.get('providers', [])
    if row_index < 0 or row_index >= len(providers):
        flash('Invalid provider index.', 'error')
        return redirect('/view/view_ddns')

    del providers[row_index]
    data['providers'] = providers

    try:
        with open(DDNS_FILE, 'w') as f:
            json.dump(data, f, indent=2)
        flash('DDNS provider deleted.', 'success')
    except Exception as ex:
        flash(f'Could not save config: {ex}', 'error')
    return redirect('/view/view_ddns')