import copy

from flask import Blueprint, request, redirect, flash
import auth
import config_utils
import sanitize

_PAGE = 'captiveportal'

bp = Blueprint(_PAGE, __name__)


@bp.route('/action/captiveportal/options_save', methods=['POST'])
@auth.require_level('administrator')
def options_save():
    cfg    = config_utils.load_config()
    before = copy.deepcopy(cfg.get('captive_portal', {}))

    try:
        http_port = int(request.form.get('http_port', '25328'))
        if not (1024 <= http_port <= 65535):
            raise ValueError
    except (ValueError, TypeError):
        flash('HTTP port must be between 1024 and 65535.', 'error')
        return redirect(f'/{_PAGE}')

    https_domain = sanitize.description(request.form.get('https_domain', ''))

    after = {**before, 'http_port': http_port, 'https_domain': https_domain}
    cfg.setdefault('captive_portal', {}).update(after)
    changes = config_utils.diff_fields(before, after)
    flash(config_utils.record_group(
        cfg, 'captive_portal', 'setting', 'captive_portal', changes, 'core apply'
    ), 'success')
    return redirect(f'/{_PAGE}')


@bp.route('/action/captiveportal/portal_save', methods=['POST'])
@auth.require_level('administrator')
def portal_save():
    cfg       = config_utils.load_config()
    vlan_name = sanitize.name(request.form.get('vlan_name', ''))

    vlan = next((v for v in cfg.get('vlans', []) if v['name'] == vlan_name), None)
    if not vlan or vlan.get('restricted_vlan') != 'c':
        flash('Captive portal VLAN not found.', 'error')
        return redirect(f'/{_PAGE}')

    existing = vlan.get('captive_portal', {})
    before = dict(existing)

    splash_title = sanitize.description(request.form.get('portal_splash_title', ''))
    splash_text  = sanitize.description(request.form.get('portal_splash_text', ''))
    terms        = [t.strip() for t in request.form.getlist('portal_terms') if t.strip()]
    require_upw  = 'require_username_password' in request.form

    try:
        dur_n    = int(request.form.get('default_duration_value', '0').strip() or '0')
        dur_unit = request.form.get('default_duration_unit', 'hours')
        mult     = {'hours': 3600, 'days': 86400}.get(dur_unit, 3600)
        duration = dur_n * mult if dur_n > 0 else 0
    except (ValueError, TypeError):
        duration = 0

    after = {
        **existing,
        'portal_splash_title':      splash_title,
        'portal_splash_text':       splash_text,
        'portal_terms':             terms,
        'require_username_password': require_upw,
        'default_duration_seconds': duration,
    }
    vlan['captive_portal'] = after

    changes = config_utils.diff_fields(before, after)
    flash(config_utils.record_group(
        cfg, 'vlans', 'portal', vlan_name, changes, 'core apply'
    ), 'success')
    return redirect(f'/{_PAGE}')