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		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

			    Preamble

  The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it.  (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.)  You can apply it to
your programs, too.

  When we speak of free software, we are referring to freedom, not
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  To protect your rights, we need to make restrictions that forbid
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  For example, if you distribute copies of such a program, whether
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  Finally, any free program is threatened constantly by software
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  The precise terms and conditions for copying, distribution and
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		    GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains
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			    NO WARRANTY

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		     END OF TERMS AND CONDITIONS

Note:
Individual files contain the following tag instead of the full license text.

    SPDX-License-Identifier: GPL-2.0-only

This enables machine processing of license information based on the SPDX
License Identifiers that are here available: http://spdx.org/licenses/
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/*
 * 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 <fstream>
#include <regex>

#include "window_manager.hpp"
#include "json_helper.hpp"
#include "applist.hpp"

extern "C"
{
#include <systemd/sd-event.h>
}

namespace wm
{

static const uint64_t kTimeOut = 3ULL; /* 3s */

/* DrawingArea name used by "{layout}.{area}" */
const char kNameLayoutNormal[] = "normal";
const char kNameLayoutSplit[]  = "split";
const char kNameAreaFull[]     = "full";
const char kNameAreaMain[]     = "main";
const char kNameAreaSub[]      = "sub";

/* Key for json obejct */
const char kKeyDrawingName[] = "drawing_name";
const char kKeyDrawingArea[] = "drawing_area";
const char kKeyDrawingRect[] = "drawing_rect";
const char kKeyX[]           = "x";
const char kKeyY[]           = "y";
const char kKeyWidth[]       = "width";
const char kKeyHeight[]      = "height";
const char kKeyWidthPixel[]  = "width_pixel";
const char kKeyHeightPixel[] = "height_pixel";
const char kKeyWidthMm[]     = "width_mm";
const char kKeyHeightMm[]    = "height_mm";
const char kKeyScale[]       = "scale";
const char kKeyIds[]         = "ids";

static sd_event_source *g_timer_ev_src = nullptr;
static AppList g_app_list;
static WindowManager *g_context;

namespace
{

using nlohmann::json;

result<json> file_to_json(char const *filename)
{
    json j;
    std::ifstream i(filename);
    if (i.fail())
    {
        HMI_DEBUG("wm", "Could not open config file, so use default layer information");
        j = default_layers_json;
    }
    else
    {
        i >> j;
    }

    return Ok(j);
}

struct result<layer_map> load_layer_map(char const *filename)
{
    HMI_DEBUG("wm", "loading IDs from %s", filename);

    auto j = file_to_json(filename);
    if (j.is_err())
    {
        return Err<layer_map>(j.unwrap_err());
    }
    json jids = j.unwrap();

    return to_layer_map(jids);
}

static int processTimerHandler(sd_event_source *s, uint64_t usec, void *userdata)
{
    HMI_NOTICE("wm", "Time out occurs because the client replys endDraw slow, so revert the request");
    reinterpret_cast<wm::WindowManager *>(userdata)->timerHandler();
    return 0;
}

static void onStateTransitioned(std::vector<WMAction> actions)
{
    g_context->startTransitionWrapper(actions);
}

static void onError()
{
    g_context->processError(WMError::LAYOUT_CHANGE_FAIL);
}
} // namespace

/**
 * WindowManager Impl
 */
WindowManager::WindowManager(wl::display *d)
    : chooks{this},
      display{d},
      controller{},
      outputs(),
      layers(),
      id_alloc{},
      pending_events(false)
{
    char const *path_layers_json = getenv("AFM_APP_INSTALL_DIR");
    std::string path;
    if (!path_layers_json)
    {
        HMI_ERROR("wm", "AFM_APP_INSTALL_DIR is not defined");
        path = std::string(path_layers_json);
    }
    else
    {
        path = std::string(path_layers_json) + std::string("/etc/layers.json");
    }

    try
    {
        {
            auto l = load_layer_map(path.c_str());
            if (l.is_ok())
            {
                this->layers = l.unwrap();
            }
            else
            {
                HMI_ERROR("wm", "%s", l.err().value());
            }
        }
    }
    catch (std::exception &e)
    {
        HMI_ERROR("wm", "Loading of configuration failed: %s", e.what());
    }
}

int WindowManager::init()
{
    if (!this->display->ok())
    {
        return -1;
    }

    if (this->layers.mapping.empty())
    {
        HMI_ERROR("wm", "No surface -> layer mapping loaded");
        return -1;
    }

    // TODO: application requests by old role,
    //       so create role map (old, new)
    // Load old_role.db
    this->loadOldRoleDb();

    // Store my context for calling callback from PolicyManager
    g_context = this;

    // Initialize PMWrapper
    this->pmw.initialize();

    // Register callback to PolicyManager
    this->pmw.registerCallback(onStateTransitioned, onError);

    // Make afb event
    for (int i = Event_Val_Min; i <= Event_Val_Max; i++)
    {
        map_afb_event[kListEventName[i]] = afb_daemon_make_event(kListEventName[i]);
    }

    this->display->add_global_handler(
        "wl_output", [this](wl_registry *r, uint32_t name, uint32_t v) {
            this->outputs.emplace_back(std::make_unique<wl::output>(r, name, v));
        });

    this->display->add_global_handler(
        "ivi_wm", [this](wl_registry *r, uint32_t name, uint32_t v) {
            this->controller =
                std::make_unique<struct compositor::controller>(r, name, v);

            // Init controller hooks
            this->controller->chooks = &this->chooks;

            // This protocol needs the output, so lets just add our mapping here...
            this->controller->add_proxy_to_id_mapping(
                this->outputs.front()->proxy.get(),
                wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
                    this->outputs.front()->proxy.get())));

            // Create screen
            this->controller->create_screen(this->outputs.front()->proxy.get());

            // Set display to controller
            this->controller->display = this->display;
        });

    // First level objects
    this->display->roundtrip();
    // Second level objects
    this->display->roundtrip();
    // Third level objects
    this->display->roundtrip();

    return init_layers();
}

int WindowManager::dispatch_pending_events()
{
    if (this->pop_pending_events())
    {
        this->display->dispatch_pending();
        return 0;
    }
    return -1;
}

void WindowManager::set_pending_events()
{
    this->pending_events.store(true, std::memory_order_release);
}

result<int> WindowManager::api_request_surface(char const *appid, char const *drawing_name)
{
    // TODO: application requests by old role,
    //       so convert role old to new
    const char *role = this->convertRoleOldToNew(drawing_name);

    auto lid = this->layers.get_layer_id(std::string(role));
    if (!lid)
    {
        /**
       * register drawing_name as fallback and make it displayed.
       */
        lid = this->layers.get_layer_id(std::string("fallback"));
        HMI_DEBUG("wm", "%s is not registered in layers.json, then fallback as normal app", role);
        if (!lid)
        {
            return Err<int>("Drawing name does not match any role, fallback is disabled");
        }
    }

    auto rname = this->lookup_id(role);
    if (!rname)
    {
        // name does not exist yet, allocate surface id...
        auto id = int(this->id_alloc.generate_id(role));
        this->layers.add_surface(id, *lid);

        // set the main_surface[_name] here and now
        if (!this->layers.main_surface_name.empty() &&
            this->layers.main_surface_name == drawing_name)
        {
            this->layers.main_surface = id;
            HMI_DEBUG("wm", "Set main_surface id to %u", id);
        }

        // add client into the db
        std::string appid_str(appid);
        g_app_list.addClient(appid_str, *lid, id, std::string(role));

        // Set role map of (new, old)
        this->rolenew2old[role] = std::string(drawing_name);

        return Ok<int>(id);
    }

    // Check currently registered drawing names if it is already there.
    return Err<int>("Surface already present");
}

char const *WindowManager::api_request_surface(char const *appid, char const *drawing_name,
                                     char const *ivi_id)
{
    ST();

    // TODO: application requests by old role,
    //       so convert role old to new
    const char *role = this->convertRoleOldToNew(drawing_name);

    auto lid = this->layers.get_layer_id(std::string(role));
    unsigned sid = std::stol(ivi_id);

    if (!lid)
    {
        /**
       * register drawing_name as fallback and make it displayed.
       */
        lid = this->layers.get_layer_id(std::string("fallback"));
        HMI_DEBUG("wm", "%s is not registered in layers.json, then fallback as normal app", role);
        if (!lid)
        {
            return "Drawing name does not match any role, fallback is disabled";
        }
    }

    auto rname = this->lookup_id(role);

    if (rname)
    {
        return "Surface already present";
    }

    // register pair drawing_name and ivi_id
    this->id_alloc.register_name_id(role, sid);
    this->layers.add_surface(sid, *lid);

    // this surface is already created
    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", sid, *lid);

    this->controller->layers[*lid]->add_surface(sid);
    this->layout_commit();

    // add client into the db
    std::string appid_str(appid);
    g_app_list.addClient(appid_str, *lid, sid, std::string(role));

    // Set role map of (new, old)
    this->rolenew2old[role] = std::string(drawing_name);

    return nullptr;
}

void WindowManager::api_activate_surface(char const *appid, char const *drawing_name,
                               char const *drawing_area, const reply_func &reply)
{
    ST();

    // TODO: application requests by old role,
    //       so convert role old to new
    const char *c_role = this->convertRoleOldToNew(drawing_name);

    std::string id = appid;
    std::string role = c_role;
    std::string area = drawing_area;
    Task task = Task::TASK_ALLOCATE;
    unsigned req_num = 0;
    WMError ret = WMError::UNKNOWN;

    ret = this->setRequest(id, role, area, task, &req_num);

    if(ret != WMError::SUCCESS)
    {
        HMI_ERROR("wm", errorDescription(ret));
        reply("Failed to set request");
        return;
    }

    reply(nullptr);
    if (req_num != g_app_list.currentRequestNumber())
    {
        // Add request, then invoked after the previous task is finished
        HMI_SEQ_DEBUG(req_num, "request is accepted");
        return;
    }

    /*
     * Do allocate tasks
     */
    ret = this->doTransition(req_num);

    if (ret != WMError::SUCCESS)
    {
        //this->emit_error()
        HMI_SEQ_ERROR(req_num, errorDescription(ret));
        g_app_list.removeRequest(req_num);
        this->processNextRequest();
    }
}

void WindowManager::api_deactivate_surface(char const *appid, char const *drawing_name,
                                 const reply_func &reply)
{
    ST();

    // TODO: application requests by old role,
    //       so convert role old to new
    const char *c_role = this->convertRoleOldToNew(drawing_name);

    /*
    * Check Phase
    */
    std::string id = appid;
    std::string role = c_role;
    std::string area = ""; //drawing_area;
    Task task = Task::TASK_RELEASE;
    unsigned req_num = 0;
    WMError ret = WMError::UNKNOWN;

    ret = this->setRequest(id, role, area, task, &req_num);

    if (ret != WMError::SUCCESS)
    {
        HMI_ERROR("wm", errorDescription(ret));
        reply("Failed to set request");
        return;
    }

    reply(nullptr);
    if (req_num != g_app_list.currentRequestNumber())
    {
        // Add request, then invoked after the previous task is finished
        HMI_SEQ_DEBUG(req_num, "request is accepted");
        return;
    }

    /*
    * Do allocate tasks
    */
    ret = this->doTransition(req_num);

    if (ret != WMError::SUCCESS)
    {
        //this->emit_error()
        HMI_SEQ_ERROR(req_num, errorDescription(ret));
        g_app_list.removeRequest(req_num);
        this->processNextRequest();
    }
}

void WindowManager::api_enddraw(char const *appid, char const *drawing_name)
{
    // TODO: application requests by old role,
    //       so convert role old to new
    const char *c_role = this->convertRoleOldToNew(drawing_name);

    std::string id = appid;
    std::string role = c_role;
    unsigned current_req = g_app_list.currentRequestNumber();
    bool result = g_app_list.setEndDrawFinished(current_req, id, role);

    if (!result)
    {
        HMI_ERROR("wm", "%s is not in transition state", id.c_str());
        return;
    }

    if (g_app_list.endDrawFullfilled(current_req))
    {
        // do task for endDraw
        this->stopTimer();
        WMError ret = this->doEndDraw(current_req);

        if(ret != WMError::SUCCESS)
        {
            //this->emit_error();

            // Undo state of PolicyManager
            this->pmw.undoState();
        }
        this->emitScreenUpdated(current_req);
        HMI_SEQ_INFO(current_req, "Finish request status: %s", errorDescription(ret));

        g_app_list.removeRequest(current_req);

        this->processNextRequest();
    }
    else
    {
        HMI_SEQ_INFO(current_req, "Wait other App call endDraw");
        return;
    }
}

result<json_object *> WindowManager::api_get_display_info()
{
    if (!this->display->ok())
    {
        return Err<json_object *>("Wayland compositor is not available");
    }

    // Set display info
    compositor::size o_size = this->controller->output_size;
    compositor::size p_size = this->controller->physical_size;

    json_object *object = json_object_new_object();
    json_object_object_add(object, kKeyWidthPixel, json_object_new_int(o_size.w));
    json_object_object_add(object, kKeyHeightPixel, json_object_new_int(o_size.h));
    json_object_object_add(object, kKeyWidthMm, json_object_new_int(p_size.w));
    json_object_object_add(object, kKeyHeightMm, json_object_new_int(p_size.h));
    json_object_object_add(object, kKeyScale, json_object_new_double(this->controller->scale));

    return Ok<json_object *>(object);
}

result<json_object *> WindowManager::api_get_area_info(char const *drawing_name)
{
    HMI_DEBUG("wm", "called");

    // TODO: application requests by old role,
    //       so convert role old to new
    const char *role = this->convertRoleOldToNew(drawing_name);

    // Check drawing name, surface/layer id
    auto const &surface_id = this->lookup_id(role);
    if (!surface_id)
    {
        return Err<json_object *>("Surface does not exist");
    }

    if (!this->controller->surface_exists(*surface_id))
    {
        return Err<json_object *>("Surface does not exist in controller!");
    }

    auto layer_id = this->layers.get_layer_id(*surface_id);
    if (!layer_id)
    {
        return Err<json_object *>("Surface is not on any layer!");
    }

    // Set area rectangle
    compositor::rect area_info = this->area_info[*surface_id];
    json_object *object = json_object_new_object();
    json_object_object_add(object, kKeyX, json_object_new_int(area_info.x));
    json_object_object_add(object, kKeyY, json_object_new_int(area_info.y));
    json_object_object_add(object, kKeyWidth, json_object_new_int(area_info.w));
    json_object_object_add(object, kKeyHeight, json_object_new_int(area_info.h));

    return Ok<json_object *>(object);
}

void WindowManager::api_ping() { this->dispatch_pending_events(); }

void WindowManager::send_event(char const *evname, char const *label)
{
    HMI_DEBUG("wm", "%s: %s(%s)", __func__, evname, label);

    json_object *j = json_object_new_object();
    json_object_object_add(j, kKeyDrawingName, json_object_new_string(label));

    int ret = afb_event_push(this->map_afb_event[evname], j);
    if (ret != 0)
    {
        HMI_DEBUG("wm", "afb_event_push failed: %m");
    }
}

void WindowManager::send_event(char const *evname, char const *label, char const *area,
                     int x, int y, int w, int h)
{
    HMI_DEBUG("wm", "%s: %s(%s, %s) x:%d y:%d w:%d h:%d",
              __func__, evname, label, area, x, y, w, h);

    json_object *j_rect = json_object_new_object();
    json_object_object_add(j_rect, kKeyX, json_object_new_int(x));
    json_object_object_add(j_rect, kKeyY, json_object_new_int(y));
    json_object_object_add(j_rect, kKeyWidth, json_object_new_int(w));
    json_object_object_add(j_rect, kKeyHeight, json_object_new_int(h));

    json_object *j = json_object_new_object();
    json_object_object_add(j, kKeyDrawingName, json_object_new_string(label));
    json_object_object_add(j, kKeyDrawingArea, json_object_new_string(area));
    json_object_object_add(j, kKeyDrawingRect, j_rect);

    int ret = afb_event_push(this->map_afb_event[evname], j);
    if (ret != 0)
    {
        HMI_DEBUG("wm", "afb_event_push failed: %m");
    }
}

/**
 * proxied events
 */
void WindowManager::surface_created(uint32_t surface_id)
{
    this->controller->get_surface_properties(surface_id, IVI_WM_PARAM_SIZE);

    auto layer_id = this->layers.get_layer_id(surface_id);
    if (!layer_id)
    {
        HMI_DEBUG("wm", "Newly created surfce %d is not associated with any layer!",
                  surface_id);
        return;
    }

    HMI_DEBUG("wm", "surface_id is %u, layer_id is %u", surface_id, *layer_id);

    this->controller->layers[*layer_id]->add_surface(surface_id);
    this->layout_commit();
}

void WindowManager::surface_removed(uint32_t surface_id)
{
    HMI_DEBUG("wm", "Delete surface_id %u", surface_id);
    this->id_alloc.remove_id(surface_id);
    this->layers.remove_surface(surface_id);
    g_app_list.removeSurface(surface_id);
}

void WindowManager::removeClient(const std::string &appid)
{
    HMI_DEBUG("wm", "Remove clinet %s from list", appid.c_str());
    g_app_list.removeClient(appid);
}

void WindowManager::exceptionProcessForTransition()
{
    unsigned req_num = g_app_list.currentRequestNumber();
    HMI_SEQ_NOTICE(req_num, "Process exception handling for request. Remove current request %d", req_num);
    g_app_list.removeRequest(req_num);
    HMI_SEQ_NOTICE(g_app_list.currentRequestNumber(), "Process next request if exists");
    this->processNextRequest();
}

void WindowManager::timerHandler()
{
    unsigned req_num = g_app_list.currentRequestNumber();
    HMI_SEQ_DEBUG(req_num, "Timer expired remove Request");
    g_app_list.reqDump();
    g_app_list.removeRequest(req_num);
    this->processNextRequest();
}

void WindowManager::startTransitionWrapper(std::vector<WMAction> &actions)
{
    WMError ret;
    unsigned req_num = g_app_list.currentRequestNumber();

    if (actions.empty())
    {
        if (g_app_list.haveRequest())
        {
            HMI_SEQ_DEBUG(req_num, "There is no WMAction for this request");
            goto proc_remove_request;
        }
        else
        {
            HMI_SEQ_DEBUG(req_num, "There is no request");
            return;
        }
    }

    for (auto &act : actions)
    {
        if ("" != act.role)
        {
            bool found;
            auto const &surface_id = this->lookup_id(act.role.c_str());
            if(surface_id == nullopt)
            {
                goto proc_remove_request;
            }
            std::string appid = g_app_list.getAppID(*surface_id, act.role, &found);
            if (!found)
            {
                if (TaskVisible::INVISIBLE == act.visible)
                {
                    // App is killed, so do not set this action
                    continue;
                }
                else
                {
                    HMI_SEQ_ERROR(req_num, "appid which is visible is not found");
                    ret = WMError::FAIL;
                    goto error;
                }
            }
            act.appid = appid;
        }

        ret = g_app_list.setAction(req_num, act);
        if (ret != WMError::SUCCESS)
        {
            HMI_SEQ_ERROR(req_num, "Setting action is failed");
            goto error;
        }
    }

    HMI_SEQ_DEBUG(req_num, "Start transition.");
    ret = this->startTransition(req_num);
    if (ret != WMError::SUCCESS)
    {
        if (ret == WMError::NO_LAYOUT_CHANGE)
        {
            goto proc_remove_request;
        }
        else
        {
            HMI_SEQ_ERROR(req_num, "Transition state is failed");
            goto error;
        }
    }

    return;

error:
    //this->emit_error()
    HMI_SEQ_ERROR(req_num, errorDescription(ret));
    this->pmw.undoState();

proc_remove_request:
    g_app_list.removeRequest(req_num);
    this->processNextRequest();
}

void WindowManager::processError(WMError error)
{
    unsigned req_num = g_app_list.currentRequestNumber();

    //this->emit_error()
    HMI_SEQ_ERROR(req_num, errorDescription(error));
    g_app_list.removeRequest(req_num);
    this->processNextRequest();
}

/*
 ******* Private Functions *******
 */

bool WindowManager::pop_pending_events()
{
    bool x{true};
    return this->pending_events.compare_exchange_strong(
        x, false, std::memory_order_consume);
}

optional<int> WindowManager::lookup_id(char const *name)
{
    return this->id_alloc.lookup(std::string(name));
}
optional<std::string> WindowManager::lookup_name(int id)
{
    return this->id_alloc.lookup(id);
}

/**
 * init_layers()
 */
int WindowManager::init_layers()
{
    if (!this->controller)
    {
        HMI_ERROR("wm", "ivi_controller global not available");
        return -1;
    }

    if (this->outputs.empty())
    {
        HMI_ERROR("wm", "no output was set up!");
        return -1;
    }

    auto &c = this->controller;

    auto &o = this->outputs.front();
    auto &s = c->screens.begin()->second;
    auto &layers = c->layers;

    // Write output dimensions to ivi controller...
    c->output_size = compositor::size{uint32_t(o->width), uint32_t(o->height)};
    c->physical_size = compositor::size{uint32_t(o->physical_width),
                                        uint32_t(o->physical_height)};


    HMI_DEBUG("wm", "SCALING: screen (%dx%d), physical (%dx%d)",
              o->width, o->height, o->physical_width, o->physical_height);

    this->layers.loadAreaDb();

    const compositor::rect css_bg = this->layers.getAreaSize("fullscreen");
    rectangle dp_bg(o->width, o->height);

    dp_bg.set_aspect(static_cast<double>(css_bg.w) / css_bg.h);
    dp_bg.fit(o->width, o->height);
    dp_bg.center(o->width, o->height);
    HMI_DEBUG("wm", "SCALING: CSS BG(%dx%d) -> DDP %dx%d,(%dx%d)",
              css_bg.w, css_bg.h, dp_bg.left(), dp_bg.top(), dp_bg.width(), dp_bg.height());

    // Clear scene
    layers.clear();

    // Clear screen
    s->clear();

    // Quick and dirty setup of layers
    for (auto const &i : this->layers.mapping)
    {
        c->layer_create(i.second.layer_id, dp_bg.width(), dp_bg.height());
        auto &l = layers[i.second.layer_id];
        l->set_destination_rectangle(dp_bg.left(), dp_bg.top(), dp_bg.width(), dp_bg.height());
        l->set_visibility(1);
        HMI_DEBUG("wm", "Setting up layer %s (%d) for surface role match \"%s\"",
                  i.second.name.c_str(), i.second.layer_id, i.second.role.c_str());
    }

    // Add layers to screen
    s->set_render_order(this->layers.layers);

    this->layout_commit();

    c->scale = static_cast<double>(dp_bg.height()) / css_bg.h;
    this->layers.setupArea(c->scale);

    return 0;
}

void WindowManager::surface_set_layout(int surface_id, const std::string& area)
{
    if (!this->controller->surface_exists(surface_id))
    {
        HMI_ERROR("wm", "Surface %d does not exist", surface_id);
        return;
    }

    auto o_layer_id = this->layers.get_layer_id(surface_id);

    if (!o_layer_id)
    {
        HMI_ERROR("wm", "Surface %d is not associated with any layer!", surface_id);
        return;
    }

    uint32_t layer_id = *o_layer_id;

    auto const &layer = this->layers.get_layer(layer_id);
    auto rect = this->layers.getAreaSize(area);
    HMI_SEQ_DEBUG(g_app_list.currentRequestNumber(), "%s : x:%d y:%d w:%d h:%d", area.c_str(),
                    rect.x, rect.y, rect.w, rect.h);
    auto &s = this->controller->surfaces[surface_id];

    int x = rect.x;
    int y = rect.y;
    int w = rect.w;
    int h = rect.h;

    HMI_DEBUG("wm", "surface_set_layout for surface %u on layer %u", surface_id,
              layer_id);

    // set destination to the display rectangle
    s->set_destination_rectangle(x, y, w, h);

    // update area information
    this->area_info[surface_id].x = x;
    this->area_info[surface_id].y = y;
    this->area_info[surface_id].w = w;
    this->area_info[surface_id].h = h;

    HMI_DEBUG("wm", "Surface %u now on layer %u with rect { %d, %d, %d, %d }",
              surface_id, layer_id, x, y, w, h);
}

void WindowManager::layout_commit()
{
    this->controller->commit_changes();
    this->display->flush();
}

void WindowManager::emit_activated(char const *label)
{
    this->send_event(kListEventName[Event_Active], label);
}

void WindowManager::emit_deactivated(char const *label)
{
    this->send_event(kListEventName[Event_Inactive], label);
}

void WindowManager::emit_syncdraw(char const *label, char const *area, int x, int y, int w, int h)
{
    this->send_event(kListEventName[Event_SyncDraw], label, area, x, y, w, h);
}

void WindowManager::emit_syncdraw(const std::string &role, const std::string &area)
{
    compositor::rect rect = this->layers.getAreaSize(area);
    this->send_event(kListEventName[Event_SyncDraw],
        role.c_str(), area.c_str(), rect.x, rect.y, rect.w, rect.h);
}

void WindowManager::emit_flushdraw(char const *label)
{
    this->send_event(kListEventName[Event_FlushDraw], label);
}

void WindowManager::emit_visible(char const *label, bool is_visible)
{
    this->send_event(is_visible ? kListEventName[Event_Visible] : kListEventName[Event_Invisible], label);
}

void WindowManager::emit_invisible(char const *label)
{
    return emit_visible(label, false);
}

void WindowManager::emit_visible(char const *label) { return emit_visible(label, true); }

void WindowManager::activate(int id)
{
    auto ip = this->controller->sprops.find(id);
    if (ip != this->controller->sprops.end())
    {
        this->controller->surfaces[id]->set_visibility(1);
        char const *label =
            this->lookup_name(id).value_or("unknown-name").c_str();

         // FOR CES DEMO >>>
        if ((0 == strcmp(label, "radio")) ||
            (0 == strcmp(label, "music")) ||
            (0 == strcmp(label, "video")) ||
            (0 == strcmp(label, "map")))
        {
            for (auto i = surface_bg.begin(); i != surface_bg.end(); ++i)
            {
                if (id == *i)
                {
                    // Remove id
                    this->surface_bg.erase(i);

                    // Remove from BG layer (999)
                    HMI_DEBUG("wm", "Remove %s(%d) from BG layer", label, id);
                    this->controller->layers[999]->remove_surface(id);

                    // Add to FG layer (1001)
                    HMI_DEBUG("wm", "Add %s(%d) to FG layer", label, id);
                    this->controller->layers[1001]->add_surface(id);

                    for (int j : this->surface_bg)
                    {
                        HMI_DEBUG("wm", "Stored id:%d", j);
                    }
                    break;
                }
            }
        }
        // <<< FOR CES DEMO

        this->layout_commit();

        // TODO: application requests by old role,
        //       so convert role new to old for emitting event
        const char* old_role = this->rolenew2old[label].c_str();

        this->emit_visible(old_role);
        this->emit_activated(old_role);
    }
}

void WindowManager::deactivate(int id)
{
    auto ip = this->controller->sprops.find(id);
    if (ip != this->controller->sprops.end())
    {
        char const *label =
            this->lookup_name(id).value_or("unknown-name").c_str();

        // FOR CES DEMO >>>
        if ((0 == strcmp(label, "radio")) ||
            (0 == strcmp(label, "music")) ||
            (0 == strcmp(label, "video")) ||
            (0 == strcmp(label, "map")))
        {

            // Store id
            this->surface_bg.push_back(id);

            // Remove from FG layer (1001)
            HMI_DEBUG("wm", "Remove %s(%d) from FG layer", label, id);
            this->controller->layers[1001]->remove_surface(id);

            // Add to BG layer (999)
            HMI_DEBUG("wm", "Add %s(%d) to BG layer", label, id);
            this->controller->layers[999]->add_surface(id);

            for (int j : surface_bg)
            {
                HMI_DEBUG("wm", "Stored id:%d", j);
            }
        }
        else
        {
            this->controller->surfaces[id]->set_visibility(0);
        }
        // <<< FOR CES DEMO

        this->layout_commit();

        // TODO: application requests by old role,
        //       so convert role new to old for emitting event
        const char* old_role = this->rolenew2old[label].c_str();

        this->emit_deactivated(old_role);
        this->emit_invisible(old_role);
    }
}

WMError WindowManager::setRequest(const std::string& appid, const std::string &role, const std::string &area,
                            Task task, unsigned* req_num)
{
    if (!g_app_list.contains(appid))
    {
        return WMError::NOT_REGISTERED;
    }

    auto client = g_app_list.lookUpClient(appid);

    /*
     * Queueing Phase
     */
    unsigned current = g_app_list.currentRequestNumber();
    unsigned requested_num = g_app_list.getRequestNumber(appid);
    if (requested_num != 0)
    {
        HMI_SEQ_INFO(requested_num,
            "%s %s %s request is already queued", appid.c_str(), role.c_str(), area.c_str());
        return REQ_REJECTED;
    }

    WMRequest req = WMRequest(appid, role, area, task);
    unsigned new_req = g_app_list.addRequest(req);
    *req_num = new_req;
    g_app_list.reqDump();

    HMI_SEQ_DEBUG(current, "%s start sequence with %s, %s", appid.c_str(), role.c_str(), area.c_str());

    return WMError::SUCCESS;
}

WMError WindowManager::doTransition(unsigned req_num)
{
    HMI_SEQ_DEBUG(req_num, "check policy");
    WMError ret = this->checkPolicy(req_num);
    return ret;
}

WMError WindowManager::checkPolicy(unsigned req_num)
{
    /*
    * Check Policy
    */
    // get current trigger
    bool found = false;
    WMError ret = WMError::LAYOUT_CHANGE_FAIL;
    auto trigger = g_app_list.getRequest(req_num, &found);
    if (!found)
    {
        ret = WMError::NO_ENTRY;
        return ret;
    }
    std::string req_area = trigger.area;

    if (trigger.task == Task::TASK_ALLOCATE)
    {
        const char *msg = this->check_surface_exist(trigger.role.c_str());

        if (msg)
        {
            HMI_SEQ_ERROR(req_num, msg);
            return ret;
        }
    }

    // Input event data to PolicyManager
    if (0 > this->pmw.setInputEventData(trigger.task, trigger.role, trigger.area))
    {
        HMI_SEQ_ERROR(req_num, "Failed to set input event data to PolicyManager");
        return ret;
    }

    // Execute state transition of PolicyManager
    if (0 > this->pmw.executeStateTransition())
    {
        HMI_SEQ_ERROR(req_num, "Failed to execute state transition of PolicyManager");
        return ret;
    }

    ret = WMError::SUCCESS;

    g_app_list.reqDump();

    return ret;
}

WMError WindowManager::startTransition(unsigned req_num)
{
    bool sync_draw_happen = false;
    bool found = false;
    WMError ret = WMError::SUCCESS;
    auto actions = g_app_list.getActions(req_num, &found);
    if (!found)
    {
        ret = WMError::NO_ENTRY;
        HMI_SEQ_ERROR(req_num,
            "Window Manager bug :%s : Action is not set", errorDescription(ret));
        return ret;
    }

    for (const auto &action : actions)
    {
        if (action.visible == TaskVisible::VISIBLE)
        {
            sync_draw_happen = true;

            // TODO: application requests by old role,
            //       so convert role new to old for emitting event
            std::string old_role = this->rolenew2old[action.role];

            this->emit_syncdraw(old_role, action.area);
            /* TODO: emit event for app not subscriber
            if(g_app_list.contains(y.appid))
                g_app_list.lookUpClient(y.appid)->emit_syncdraw(y.role, y.area); */
        }
    }

    if (sync_draw_happen)
    {
        this->setTimer();
    }
    else
    {
        // deactivate only, no syncDraw
        // Make it deactivate here
        for (const auto &x : actions)
        {
            if (g_app_list.contains(x.appid))
            {
                auto client = g_app_list.lookUpClient(x.appid);
                this->deactivate(client->surfaceID(x.role));
            }
        }
        ret = WMError::NO_LAYOUT_CHANGE;
    }
    return ret;
}

WMError WindowManager::doEndDraw(unsigned req_num)
{
    // get actions
    bool found;
    auto actions = g_app_list.getActions(req_num, &found);
    WMError ret = WMError::SUCCESS;
    if (!found)
    {
        ret = WMError::NO_ENTRY;
        return ret;
    }

    HMI_SEQ_INFO(req_num, "do endDraw");

    // layout change and make it visible
    for (const auto &act : actions)
    {
        if(act.visible != TaskVisible::NO_CHANGE)
        {
            // layout change
            if(!g_app_list.contains(act.appid)){
                ret = WMError::NOT_REGISTERED;
            }
            ret = this->layoutChange(act);
            if(ret != WMError::SUCCESS)
            {
                HMI_SEQ_WARNING(req_num,
                    "Failed to manipulate surfaces while state change : %s", errorDescription(ret));
                return ret;
            }
            ret = this->visibilityChange(act);
            if (ret != WMError::SUCCESS)
            {
                HMI_SEQ_WARNING(req_num,
                    "Failed to manipulate surfaces while state change : %s", errorDescription(ret));
                return ret;
            }
            HMI_SEQ_DEBUG(req_num, "visible %s", act.role.c_str());
            //this->lm_enddraw(act.role.c_str());
        }
    }
    this->layout_commit();

    HMI_SEQ_INFO(req_num, "emit flushDraw");

    for(const auto &act_flush : actions)
    {
        if(act_flush.visible == TaskVisible::VISIBLE)
        {
            // TODO: application requests by old role,
            //       so convert role new to old for emitting event
            std::string old_role = this->rolenew2old[act_flush.role];

            this->emit_flushdraw(old_role.c_str());
        }
    }

    return ret;
}

WMError WindowManager::layoutChange(const WMAction &action)
{
    if (action.visible == TaskVisible::INVISIBLE)
    {
        // Visibility is not change -> no redraw is required
        return WMError::SUCCESS;
    }
    auto client = g_app_list.lookUpClient(action.appid);
    unsigned surface = client->surfaceID(action.role);
    if (surface == 0)
    {
        HMI_SEQ_ERROR(g_app_list.currentRequestNumber(),
                      "client doesn't have surface with role(%s)", action.role.c_str());
        return WMError::NOT_REGISTERED;
    }
    // Layout Manager
    WMError ret = this->setSurfaceSize(surface, action.area);
    return ret;
}

WMError WindowManager::visibilityChange(const WMAction &action)
{
    HMI_SEQ_DEBUG(g_app_list.currentRequestNumber(), "Change visibility");
    if(!g_app_list.contains(action.appid)){
        return WMError::NOT_REGISTERED;
    }
    auto client = g_app_list.lookUpClient(action.appid);
    unsigned surface = client->surfaceID(action.role);
    if(surface == 0)
    {
        HMI_SEQ_ERROR(g_app_list.currentRequestNumber(),
                      "client doesn't have surface with role(%s)", action.role.c_str());
        return WMError::NOT_REGISTERED;
    }

    if (action.visible != TaskVisible::INVISIBLE)
    {
        this->activate(surface); // Layout Manager task
    }
    else
    {
        this->deactivate(surface); // Layout Manager task
    }
    return WMError::SUCCESS;
}

WMError WindowManager::setSurfaceSize(unsigned surface, const std::string &area)
{
    this->surface_set_layout(surface, area);

    return WMError::SUCCESS;
}

void WindowManager::emitScreenUpdated(unsigned req_num)
{
    // Get visible apps
    HMI_SEQ_DEBUG(req_num, "emit screen updated");
    bool found = false;
    auto actions = g_app_list.getActions(req_num, &found);

    // create json object
    json_object *j = json_object_new_object();
    json_object *jarray = json_object_new_array();

    for(const auto& action: actions)
    {
        if(action.visible != TaskVisible::INVISIBLE)
        {
            json_object_array_add(jarray, json_object_new_string(action.appid.c_str()));
        }
    }
    json_object_object_add(j, kKeyIds, jarray);
    HMI_SEQ_INFO(req_num, "Visible app: %s", json_object_get_string(j));

    int ret = afb_event_push(
        this->map_afb_event[kListEventName[Event_ScreenUpdated]], j);
    if (ret != 0)
    {
        HMI_DEBUG("wm", "afb_event_push failed: %m");
    }
}

void WindowManager::setTimer()
{
    struct timespec ts;
    if (clock_gettime(CLOCK_BOOTTIME, &ts) != 0) {
        HMI_ERROR("wm", "Could't set time (clock_gettime() returns with error");
        return;
    }

    HMI_SEQ_DEBUG(g_app_list.currentRequestNumber(), "Timer set activate");
    if (g_timer_ev_src == nullptr)
    {
        // firsttime set into sd_event
        int ret = sd_event_add_time(afb_daemon_get_event_loop(), &g_timer_ev_src,
            CLOCK_BOOTTIME, (uint64_t)(ts.tv_sec + kTimeOut) * 1000000ULL, 1, processTimerHandler, this);
        if (ret < 0)
        {
            HMI_ERROR("wm", "Could't set timer");
        }
    }
    else
    {
        // update timer limitation after second time
        sd_event_source_set_time(g_timer_ev_src, (uint64_t)(ts.tv_sec + kTimeOut) * 1000000ULL);
        sd_event_source_set_enabled(g_timer_ev_src, SD_EVENT_ONESHOT);
    }
}

void WindowManager::stopTimer()
{
    unsigned req_num = g_app_list.currentRequestNumber();
    HMI_SEQ_DEBUG(req_num, "Timer stop");
    int rc = sd_event_source_set_enabled(g_timer_ev_src, SD_EVENT_OFF);
    if (rc < 0)
    {
        HMI_SEQ_ERROR(req_num, "Timer stop failed");
    }
}

void WindowManager::processNextRequest()
{
    g_app_list.next();
    g_app_list.reqDump();
    unsigned req_num = g_app_list.currentRequestNumber();
    if (g_app_list.haveRequest())
    {
        HMI_SEQ_DEBUG(req_num, "Process next request");
        WMError rc = doTransition(req_num);
        if (rc != WMError::SUCCESS)
        {
            HMI_SEQ_ERROR(req_num, errorDescription(rc));
        }
    }
    else
    {
        HMI_SEQ_DEBUG(req_num, "Nothing Request. Waiting Request");
    }
}

const char* WindowManager::convertRoleOldToNew(char const *old_role)
{
    const char *new_role = nullptr;

    for (auto const &on : this->roleold2new)
    {
        std::regex regex = std::regex(on.first);
        if (std::regex_match(old_role, regex))
        {
            // role is old. So convert to new.
            new_role = on.second.c_str();
            break;
        }
    }

    if (nullptr == new_role)
    {
        // role is new or fallback.
        new_role = old_role;
    }

    HMI_DEBUG("wm", "old:%s -> new:%s", old_role, new_role);

    return new_role;
}

int WindowManager::loadOldRoleDb()
{
    // Get afm application installed dir
    char const *afm_app_install_dir = getenv("AFM_APP_INSTALL_DIR");
    HMI_DEBUG("wm", "afm_app_install_dir:%s", afm_app_install_dir);

    std::string file_name;
    if (!afm_app_install_dir)
    {
        HMI_ERROR("wm", "AFM_APP_INSTALL_DIR is not defined");
    }
    else
    {
        file_name = std::string(afm_app_install_dir) + std::string("/etc/old_roles.db");
    }

    // Load old_role.db
    json_object* json_obj;
    int ret = jh::inputJsonFilie(file_name.c_str(), &json_obj);
    if (0 > ret)
    {
        HMI_ERROR("wm", "Could not open old_role.db, so use default old_role information");
        json_obj = json_tokener_parse(kDefaultOldRoleDb);
    }
    HMI_DEBUG("wm", "json_obj dump:%s", json_object_get_string(json_obj));

    // Perse apps
    json_object* json_cfg;
    if (!json_object_object_get_ex(json_obj, "old_roles", &json_cfg))
    {
        HMI_ERROR("wm", "Parse Error!!");
        return -1;
    }

    int len = json_object_array_length(json_cfg);
    HMI_DEBUG("wm", "json_cfg len:%d", len);
    HMI_DEBUG("wm", "json_cfg dump:%s", json_object_get_string(json_cfg));

    for (int i=0; i<len; i++)
    {
        json_object* json_tmp = json_object_array_get_idx(json_cfg, i);

        const char* old_role = jh::getStringFromJson(json_tmp, "name");
        if (nullptr == old_role)
        {
            HMI_ERROR("wm", "Parse Error!!");
            return -1;
        }

        const char* new_role = jh::getStringFromJson(json_tmp, "new");
        if (nullptr == new_role)
        {
            HMI_ERROR("wm", "Parse Error!!");
            return -1;
        }

        this->roleold2new[old_role] = std::string(new_role);
    }

    // Check
    for(auto itr = this->roleold2new.begin();
      itr != this->roleold2new.end(); ++itr)
    {
        HMI_DEBUG("wm", ">>> role old:%s new:%s",
                  itr->first.c_str(), itr->second.c_str());
    }

    // Release json_object
    json_object_put(json_obj);

    return 0;
}

const char *WindowManager::check_surface_exist(const char *drawing_name)
{
    auto const &surface_id = this->lookup_id(drawing_name);
    if (!surface_id)
    {
        return "Surface does not exist";
    }

    if (!this->controller->surface_exists(*surface_id))
    {
        return "Surface does not exist in controller!";
    }

    auto layer_id = this->layers.get_layer_id(*surface_id);

    if (!layer_id)
    {
        return "Surface is not on any layer!";
    }

    HMI_DEBUG("wm", "surface %d is detected", *surface_id);
    return nullptr;
}

const char* WindowManager::kDefaultOldRoleDb = "{ \
    \"old_roles\": [ \
        { \
            \"name\": \"HomeScreen\", \
            \"new\": \"homescreen\" \
        }, \
        { \
            \"name\": \"Music\", \
            \"new\": \"music\" \
        }, \
        { \
            \"name\": \"MediaPlayer\", \
            \"new\": \"music\" \
        }, \
        { \
            \"name\": \"Video\", \
            \"new\": \"video\" \
        }, \
        { \
            \"name\": \"VideoPlayer\", \
            \"new\": \"video\" \
        }, \
        { \
            \"name\": \"WebBrowser\", \
            \"new\": \"browser\" \
        }, \
        { \
            \"name\": \"Radio\", \
            \"new\": \"radio\" \
        }, \
        { \
            \"name\": \"Phone\", \
            \"new\": \"phone\" \
        }, \
        { \
            \"name\": \"Navigation\", \
            \"new\": \"map\" \
        }, \
        { \
            \"name\": \"HVAC\", \
            \"new\": \"hvac\" \
        }, \
        { \
            \"name\": \"Settings\", \
            \"new\": \"settings\" \
        }, \
        { \
            \"name\": \"Dashboard\", \
            \"new\": \"dashboard\" \
        }, \
        { \
            \"name\": \"POI\", \
            \"new\": \"poi\" \
        }, \
        { \
            \"name\": \"Mixer\", \
            \"new\": \"mixer\" \
        }, \
        { \
            \"name\": \"Restriction\", \
            \"new\": \"restriction\" \
        }, \
        { \
            \"name\": \"^OnScreen.*\", \
            \"new\": \"on_screen\" \
        } \
    ] \
}";

/**
 * controller_hooks
 */
void controller_hooks::surface_created(uint32_t surface_id)
{
    this->wmgr->surface_created(surface_id);
}

void controller_hooks::surface_removed(uint32_t surface_id)
{
    this->wmgr->surface_removed(surface_id);
}

void controller_hooks::surface_visibility(uint32_t /*surface_id*/,
                                          uint32_t /*v*/) {}

void controller_hooks::surface_destination_rectangle(uint32_t /*surface_id*/,
                                                     uint32_t /*x*/,
                                                     uint32_t /*y*/,
                                                     uint32_t /*w*/,
                                                     uint32_t /*h*/) {}

} // namespace wm