/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2016 Red Hat, Inc.
 */
/**
 * SECTION:nmt-page-ip_tunnel
 * @short_description: The editor page for IP tunnel connections
 */

#include "libnm-client-aux-extern/nm-default-client.h"

#include "nmt-page-ip-tunnel.h"

#include "libnm-core-aux-intern/nm-libnm-core-utils.h"
#include "nmt-device-entry.h"
#include "nmt-mtu-entry.h"

G_DEFINE_TYPE(NmtPageIPTunnel, nmt_page_ip_tunnel, NMT_TYPE_EDITOR_PAGE_DEVICE)

#define NMT_PAGE_IP_TUNNEL_GET_PRIVATE(o) \
    (G_TYPE_INSTANCE_GET_PRIVATE((o), NMT_TYPE_PAGE_IP_TUNNEL, NmtPageIPTunnelPrivate))

typedef struct {
    NmtNewtEntry *input_key;
    NmtNewtEntry *output_key;
} NmtPageIPTunnelPrivate;

NmtEditorPage *
nmt_page_ip_tunnel_new(NMConnection *conn, NmtDeviceEntry *deventry)
{
    return g_object_new(NMT_TYPE_PAGE_IP_TUNNEL,
                        "connection",
                        conn,
                        "device-entry",
                        deventry,
                        NULL);
}

static void
nmt_page_ip_tunnel_init(NmtPageIPTunnel *ip_tunnel)
{}

static void
mode_changed(GObject *object, GParamSpec *pspec, gpointer user_data)
{
    NMSettingIPTunnel      *s_ip_tunnel = NM_SETTING_IP_TUNNEL(object);
    NmtPageIPTunnel        *ip_tunnel   = NMT_PAGE_IP_TUNNEL(user_data);
    NmtPageIPTunnelPrivate *priv        = NMT_PAGE_IP_TUNNEL_GET_PRIVATE(ip_tunnel);
    NMIPTunnelMode          mode;
    gboolean                enable_keys;

    mode        = nm_setting_ip_tunnel_get_mode(s_ip_tunnel);
    enable_keys = NM_IN_SET(mode, NM_IP_TUNNEL_MODE_GRE, NM_IP_TUNNEL_MODE_IP6GRE);
    nmt_newt_widget_set_visible(NMT_NEWT_WIDGET(priv->input_key), enable_keys);
    nmt_newt_widget_set_visible(NMT_NEWT_WIDGET(priv->output_key), enable_keys);

    if (!enable_keys) {
        nmt_newt_entry_set_text(priv->input_key, "");
        nmt_newt_entry_set_text(priv->output_key, "");
    }
}

static NmtNewtPopupEntry tunnel_mode[] = {
    /* The order must match the NM_IP_TUNNEL_MODE_* enum */
    {N_("IPIP"), "IPIP"},
    {N_("GRE"), "GRE"},
    {N_("SIT"), "SIT"},
    {N_("ISATAP"), "ISATAP"},
    {N_("VTI"), "VTI"},
    {N_("IP6IP6"), "IP6IP6"},
    {N_("IPIP6"), "IPIP6"},
    {N_("IP6GRE"), "IP6GRE"},
    {N_("VTI6"), "VTI6"},
    {NULL, NULL}};

static gboolean
add_offset(GBinding *binding, const GValue *from_value, GValue *to_value, gpointer user_data)
{
    guint v;
    int   offset = GPOINTER_TO_INT(user_data);

    g_return_val_if_fail(G_VALUE_HOLDS(from_value, G_TYPE_UINT), FALSE);
    g_return_val_if_fail(G_VALUE_HOLDS(to_value, G_TYPE_UINT), FALSE);

    v = g_value_get_uint(from_value);
    v += offset;

    g_value_set_uint(to_value, v);

    return TRUE;
}

static void
nmt_page_ip_tunnel_constructed(GObject *object)
{
    NmtPageIPTunnel        *ip_tunnel = NMT_PAGE_IP_TUNNEL(object);
    NmtPageIPTunnelPrivate *priv      = NMT_PAGE_IP_TUNNEL_GET_PRIVATE(ip_tunnel);
    NmtEditorSection       *section;
    NmtEditorGrid          *grid;
    NMSettingIPTunnel      *s_ip_tunnel;
    NmtNewtWidget          *widget, *parent;
    NMConnection           *conn;
    GClosure               *s2w, *w2s;

    conn        = nmt_editor_page_get_connection(NMT_EDITOR_PAGE(ip_tunnel));
    s_ip_tunnel = _nm_connection_ensure_setting(conn, NM_TYPE_SETTING_IP_TUNNEL);

    /* Initialize the mode for new connections */
    if (nm_setting_ip_tunnel_get_mode(s_ip_tunnel) == NM_IP_TUNNEL_MODE_UNKNOWN) {
        g_object_set(s_ip_tunnel, NM_SETTING_IP_TUNNEL_MODE, (guint) NM_IP_TUNNEL_MODE_IPIP, NULL);
    }

    section = nmt_editor_section_new(_("IP tunnel"), NULL, TRUE);
    grid    = nmt_editor_section_get_body(section);

    /* To convert between widget index (0-based) and setting index (1-based) */
    s2w = g_cclosure_new(G_CALLBACK(add_offset), GINT_TO_POINTER(-1), NULL);
    w2s = g_cclosure_new(G_CALLBACK(add_offset), GINT_TO_POINTER(1), NULL);

    widget = nmt_newt_popup_new(tunnel_mode);
    g_object_bind_property_with_closures(s_ip_tunnel,
                                         NM_SETTING_IP_TUNNEL_MODE,
                                         widget,
                                         "active",
                                         G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE,
                                         s2w,
                                         w2s);
    nmt_editor_grid_append(grid, _("Mode"), widget, NULL);

    widget = parent = nmt_device_entry_new(_("Parent"), 40, G_TYPE_NONE, FALSE);
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_PARENT,
                           widget,
                           "interface-name",
                           G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
    nmt_editor_grid_append(grid, NULL, widget, NULL);

    widget = nmt_newt_entry_new(40, 0);
    nmt_editor_grid_append(grid, _("Local IP"), widget, NULL);
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_LOCAL,
                           widget,
                           "text",
                           G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

    widget = nmt_newt_entry_new(40, 0);
    nmt_editor_grid_append(grid, _("Remote IP"), widget, NULL);
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_REMOTE,
                           widget,
                           "text",
                           G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);

    widget = nmt_newt_entry_new(40, 0);
    nmt_editor_grid_append(grid, _("Input key"), widget, NULL);
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_INPUT_KEY,
                           widget,
                           "text",
                           G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);
    priv->input_key = NMT_NEWT_ENTRY(widget);

    widget = nmt_newt_entry_new(40, 0);
    nmt_editor_grid_append(grid, _("Output key"), widget, NULL);
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_OUTPUT_KEY,
                           widget,
                           "text",
                           G_BINDING_SYNC_CREATE | G_BINDING_BIDIRECTIONAL);
    priv->output_key = NMT_NEWT_ENTRY(widget);

    widget = nmt_mtu_entry_new();
    g_object_bind_property(s_ip_tunnel,
                           NM_SETTING_IP_TUNNEL_MTU,
                           widget,
                           "mtu",
                           G_BINDING_BIDIRECTIONAL | G_BINDING_SYNC_CREATE);
    nmt_editor_grid_append(grid, _("MTU"), widget, NULL);

    g_signal_connect(s_ip_tunnel,
                     "notify::" NM_SETTING_IP_TUNNEL_MODE,
                     G_CALLBACK(mode_changed),
                     ip_tunnel);
    mode_changed(G_OBJECT(s_ip_tunnel), NULL, ip_tunnel);

    nmt_editor_page_add_section(NMT_EDITOR_PAGE(ip_tunnel), section);

    G_OBJECT_CLASS(nmt_page_ip_tunnel_parent_class)->constructed(object);
}

static void
nmt_page_ip_tunnel_class_init(NmtPageIPTunnelClass *ip_tunnel_class)
{
    GObjectClass *object_class = G_OBJECT_CLASS(ip_tunnel_class);

    g_type_class_add_private(ip_tunnel_class, sizeof(NmtPageIPTunnelPrivate));

    /* virtual methods */
    object_class->constructed = nmt_page_ip_tunnel_constructed;
}
