/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <assert.h>
#include <unistd.h>
#include "wm_layer_control.hpp"
#include "wm_layer.hpp"

#define LC_AREA_PATH "/etc/area.db"
#define LC_LAYER_SETTING_PATH "/etc/layer_setting.json"

using std::string;

namespace wm {

static void notification_static(ilmObjectType object,
                            t_ilm_uint id,
                            t_ilm_bool created,
                            void* data)
{
    static_cast<LayerControl*>(data)->dispatchILMEvent(object, id, created);
}

LayerControl::LayerControl(const std::string& root)
{
    string area_path = root + LC_AREA_PATH;
    string layer_path= root + LC_LAYER_SETTING_PATH;
    // load layers.setting.json
    // load area.db
}

WMError LayerControl::init()
{
    ilmErrorTypes rc = ilm_init();
    t_ilm_uint num = 0;
    t_ilm_uint *ids;
    int cnt = 0;

    while (rc != ILM_SUCCESS)
    {
        cnt++;
        if (20 <= cnt)
        {
            HMI_ERROR("Could not connect to compositor");
            goto lc_init_error;
        }
        HMI_ERROR("Wait to start weston ...");
        sleep(1);
        ilm_init();
    }
    if(rc != ILM_SUCCESS) goto lc_init_error;

    rc = ilm_getScreenIDs(&num, &ids);

    if(rc != ILM_SUCCESS) goto lc_init_error;

    for(unsigned i = 0; i < num; i++)
    {
        HMI_INFO("get screen: %d", ids[i]);
    }
    // Currently, 0 is only available
    this->screenID = ids[0];

    rc = ilm_getPropertiesOfScreen(this->screenID, &this->screen_prop);

    if(rc != ILM_SUCCESS) goto lc_init_error;

    // Register Callback from ILM
    ilm_registerNotification(notification_static, this);

    return WMError::SUCCESS;

lc_init_error:
    HMI_ERROR("Failed to initialize. Terminate WM");

    return WMError::FAIL;
}

unsigned LayerControl::getNewLayerID(const string& role)
{
    unsigned ret = 0;
    for(const auto& l: this->wm_layers)
    {
        ret = l->getNewLayerID(role);
        if(ret != 0)
        {
            break;
        }
    }
    return ret;
}

WMError LayerControl::updateLayer(WMLayer& wm_layer)
{
    return WMError::SUCCESS;
}

void LayerControl::commitChange() {}

void LayerControl::undoUpdate() {}

WMError LayerControl::load(const string &path)
{
    return WMError::SUCCESS;
}

void LayerControl::dispatchILMEvent(ilmObjectType object, t_ilm_uint id, t_ilm_bool created)
{
    ;
}

} // namespace wm