/*
 * 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 "app.hpp"
#include "json_helper.hpp"
#include "layers.hpp"
#include "layout.hpp"
#include "util.hpp"
#include "wayland_ivi_wm.hpp"

#include <cstdio>
#include <memory>

#include <cassert>

#include <json-c/json.h>

#include <algorithm>
#include <csignal>
#include <fstream>
#include <json.hpp>
#include <regex>
#include <thread>
#include <string>


namespace wm {

/* 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";


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);
}

}  // namespace


/**
 * App Impl
 */
App::App(wl::display *d)
   : chooks{this},
     display{d},
     controller{},
     outputs(),
     config(),
     layers(),
     id_alloc{},
     pending_events(false),
     policy{} {
   try {
      {
         auto l = load_layer_map(
            this->config.get_string("layers.json").value().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());
   }

   // Initialize current car info
   this->crr_car_info_.parking_brake_stt = true;
   this->crr_car_info_.accel_pedal_stt = false;
   this->crr_car_info_.accel_pedal_pos = 0;
   this->crr_car_info_.car_stt = "stop";
   this->crr_car_info_.headlamp_stt = false;
}

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

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

#if 1 // @@@@@
   // Load app.db
   this->loadAppDb();
#endif

   // Initialize PolicyManager
   this->pm_.initialize();

   // Initialize LayoutManager
   this->lm_.initialize();

   // 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.back()->proxy.get(),
            wl_proxy_get_id(reinterpret_cast<struct wl_proxy *>(
               this->outputs.back()->proxy.get())));

         // Create screen
         this->controller->create_screen(this->outputs.back()->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 App::dispatch_pending_events() {
   if (this->pop_pending_events()) {
      this->display->dispatch_pending();
      return 0;
   }
   return -1;
}

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

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

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

/**
 * init_layers()
 */
int App::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)};

   // 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, o->width, o->height);
      auto &l = layers[i.second.layer_id];
      l->set_destination_rectangle(0, 0, o->width, o->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();

   return 0;
}

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

void App::allocateWindowResource(char const *event, char const *drawing_name,
                                 char const *drawing_area, char const *role,
                                 const reply_func &reply) {
    const char* new_role = nullptr;
    const char* new_area = nullptr;

    if (0 == strcmp("activate", event)) {
        // TODO:
        // This process will be removed
        // because the applications will specify role instead of drawing_name
        {
            if ((nullptr == role) || (0 == strcmp("", role))) {
                HMI_DEBUG("wm", "Role is not specified, so get by using app name");
                new_role = this->app2role_[drawing_name].c_str();
            }
            else {
                new_role = role;
            }
            HMI_DEBUG("wm", "drawing_name:%s, new_role: %s", drawing_name, new_role);
        }

        // TODO:
        // This process will be removed
        // because the area "normal.full" and "normalfull" will be prohibited
        {
            if (0 == strcmp("Restriction", drawing_name)) {
                new_area = drawing_area;
            }
            else {
                if (nullptr == drawing_area) {
                    new_area = "normal";
                }
                else if (0 == strcmp("normal.full", drawing_area)) {
                    new_area = "normal";
                }
                else if (0 == strcmp("restriction.split.sub", drawing_area)) {
                    new_area = "restriction.split.sub";
                }
                else if (0 == strcmp("homescreen", new_role)) {
                    // Now homescreen specifies "normalfull"
                    new_area = "full";
                }
                else {
                    new_area = "normal";
                }
            }
            HMI_DEBUG("wm", "drawing_area:%s, new_area: %s", drawing_area, new_area);
        }
    }
    else if (0 == strcmp("deactivate", event)) {
        // TODO:
        // This process will be removed
        // because the applications will specify role instead of drawing_name
        {
            if ((nullptr == role) || (0 == strcmp("", role))) {
                HMI_DEBUG("wm", "Role is not specified, so get by using app name");
                new_role = this->app2role_[drawing_name].c_str();
            }
            else {
                new_role = role;
            }
            HMI_DEBUG("wm", "drawing_name:%s, new_role: %s", drawing_name, new_role);
        }
        new_area = "";
    }

    // TODO:
    // Check role

    // TODO:
    // If event is "activate" and area is not specifid,
    // get default value by using role

    // Check Policy
    json_object* json_in = json_object_new_object();
    json_object* json_out = json_object_new_object();
    json_object_object_add(json_in, "event", json_object_new_string(event));

    if (nullptr != new_role) {
        json_object_object_add(json_in, "role", json_object_new_string(new_role));
    }
    if (nullptr != new_area) {
        json_object_object_add(json_in, "area", json_object_new_string(new_area));
    }

    int ret = this->pm_.checkPolicy(json_in, &json_out);
    if (0 > ret) {
        reply("Error checkPolicy()");
        return;
    }
    else {
        HMI_DEBUG("wm", "result: %s", json_object_get_string(json_out));
    }

    // Release json_object
    json_object_put(json_in);

    // Check parking brake state
    json_object* json_parking_brake;
    if (!json_object_object_get_ex(json_out, "parking_brake", &json_parking_brake)) {
        reply("Not found key \"parking_brake\"");
        return;
    }

    json_bool is_changed;
    is_changed = jh::getBoolFromJson(json_parking_brake, "is_changed");
    if (is_changed) {
        std::string parking_brake_state = jh::getStringFromJson(json_parking_brake, "state");
        HMI_DEBUG("wm", "parking_brake_state: %s", parking_brake_state.c_str());

        // Update state and emit event
        if ("parking_brake_off" == parking_brake_state) {
            this->crr_car_info_.parking_brake_stt = false;
#if 0 // FOR ALS: using lightstatus brake, so do not emit parking brake event
            this->emitParkingBrakeOff();
#endif
        }
        else if ("parking_brake_on" == parking_brake_state) {
            this->crr_car_info_.parking_brake_stt = true;
#if 0 // FOR ALS: using lightstatus brake, so do not emit parking brake event
            this->emitParkingBrakeOn();
#endif
        }
        else {
            reply("Unknown parking brake state");
            return;
        }
    }

    // Check accelerator pedal state
    json_object* json_accel_pedal;
    if (!json_object_object_get_ex(json_out, "accel_pedal", &json_accel_pedal)) {
        reply("Not found key \"accel_pedal\"");
        return;
    }

    is_changed = jh::getBoolFromJson(json_accel_pedal, "is_changed");
    if (is_changed) {
        std::string accel_pedal_state = jh::getStringFromJson(json_accel_pedal, "state");
        HMI_DEBUG("wm", "accel_pedal_state: %s", accel_pedal_state.c_str());

        // Update state
        if ("accel_pedal_off" == accel_pedal_state) {
            this->crr_car_info_.accel_pedal_stt = false;
        }
        else if ("accel_pedal_on" == accel_pedal_state) {
            this->crr_car_info_.accel_pedal_stt = true;
        }
        else {
            reply("Unknown accel pedal state");
            return;
        }
    }

    // Check lightstatus brake state
    json_object* json_lightstatus_brake;
    if (!json_object_object_get_ex(json_out, "lightstatus_brake", &json_lightstatus_brake)) {
        reply("Not found key \"lightstatus_brake\"");
        return;
    }

    is_changed = jh::getBoolFromJson(json_lightstatus_brake, "is_changed");
    if (is_changed) {
        std::string lightstatus_brake_state = jh::getStringFromJson(json_lightstatus_brake, "state");
        HMI_DEBUG("wm", "lightstatus_brake_state: %s", lightstatus_brake_state.c_str());

        // Update state and emit event
        if ("lightstatus_brake_off" == lightstatus_brake_state) {
            this->crr_car_info_.lightstatus_brake_stt = false;
            this->emitLightstatusBrakeOff();
        }
        else if ("lightstatus_brake_on" == lightstatus_brake_state) {
            this->crr_car_info_.lightstatus_brake_stt = true;
            this->emitLightstatusBrakeOn();
        }
        else {
            reply("Unknown lightstatus brake state");
            return;
        }
    }

    // Check car state
    json_object* json_car;
    if (!json_object_object_get_ex(json_out, "car", &json_car)) {
        reply("Not found key \"car\"");
        return;
    }

    is_changed = jh::getBoolFromJson(json_car, "is_changed");
    if (is_changed) {
        std::string car_state = jh::getStringFromJson(json_car, "state");
        HMI_DEBUG("wm", "car_state: %s", car_state.c_str());

        // Emit car event
        if ("car_stop" == car_state) {
            this->crr_car_info_.car_stt = "stop";
            this->emitCarStop();
        }
        else if ("car_run" == car_state) {
            this->crr_car_info_.car_stt = "run";
            this->emitCarRun();
        }
        else {
            reply("Unknown car state");
            return;
        }
    }

    // Check lamp state
    json_object* json_lamp;
    if (!json_object_object_get_ex(json_out, "lamp", &json_lamp)) {
        reply("Not found key \"lamp\"");
        return;
    }

    is_changed = jh::getBoolFromJson(json_lamp, "is_changed");
    if (is_changed) {
        std::string lamp_state = jh::getStringFromJson(json_lamp, "state");
        HMI_DEBUG("wm", "lamp_state: %s", lamp_state.c_str());

        // Update state and emit event
        if ("lamp_off" == lamp_state) {
            this->crr_car_info_.headlamp_stt = false;
            this->emitHeadlampOff();
        }
        else if ("lamp_on" == lamp_state) {
            this->crr_car_info_.headlamp_stt = true;
            this->emitHeadlampOn();
        }
        else {
            reply("Unknown lamp state");
            return;
        }
    }

    // Get category
    const char* category = nullptr;
    std::string str_category;
    if (nullptr != new_role) {
        str_category = this->pm_.roleToCategory(new_role);
        category = str_category.c_str();
        HMI_DEBUG("wm", "role:%s category:%s", new_role, category);
    }

    // Update layout
    if (this->lm_.updateLayout(json_out, new_role, category)) {
        HMI_DEBUG("wm", "Layer is changed!!");

        // Allocate surface
        this->allocateSurface();
    }
    else {
        HMI_DEBUG("wm", "All layer is NOT changed!!");
    }

    // Release json_object
    json_object_put(json_out);

    return;
}

void App::enqueue_flushdraw(int surface_id) {
   this->check_flushdraw(surface_id);
   HMI_DEBUG("wm", "Enqueuing EndDraw for surface_id %d", surface_id);
   this->pending_end_draw.push_back(surface_id);
}

void App::check_flushdraw(int surface_id) {
   auto i = std::find(std::begin(this->pending_end_draw),
                      std::end(this->pending_end_draw), surface_id);
   if (i != std::end(this->pending_end_draw)) {
      auto n = this->lookup_name(surface_id);
      HMI_ERROR("wm", "Application %s (%d) has pending EndDraw call(s)!",
               n ? n->c_str() : "unknown-name", surface_id);
      std::swap(this->pending_end_draw[std::distance(
                   std::begin(this->pending_end_draw), i)],
                this->pending_end_draw.back());
      this->pending_end_draw.resize(this->pending_end_draw.size() - 1);
   }
}

void App::api_enddraw(char const *drawing_name) {
   for (unsigned i = 0, iend = this->pending_end_draw.size(); i < iend; i++) {
      auto n = this->lookup_name(this->pending_end_draw[i]);
      if (n && *n == drawing_name) {
         std::swap(this->pending_end_draw[i], this->pending_end_draw[iend - 1]);
         this->pending_end_draw.resize(iend - 1);
         this->activate(this->pending_end_draw[i]);
         this->emit_flushdraw(drawing_name);
      }
   }
}

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

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

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

void App::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 App::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 App::surface_created(uint32_t surface_id) {
   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();
   // activate the main_surface right away
   /*if (surface_id == static_cast<unsigned>(this->layers.main_surface)) {
      HMI_DEBUG("wm", "Activating main_surface (%d)", surface_id);

      this->api_activate_surface(
         this->lookup_name(surface_id).value_or("unknown-name").c_str());
   }*/
}

void App::surface_removed(uint32_t surface_id) {
   HMI_DEBUG("wm", "surface_id is %u", surface_id);

   // We cannot normally deactivate the main_surface, so be explicit
   // about it:
   if (int(surface_id) == this->layers.main_surface) {
      this->deactivate_main_surface();
   } else {
      auto drawing_name = this->lookup_name(surface_id);
      if (drawing_name) {
         this->allocateWindowResource("deactivate", drawing_name->c_str(),
                                      nullptr, nullptr,
                                      [](const char*){});
      }
   }

   this->id_alloc.remove_id(surface_id);
   this->layers.remove_surface(surface_id);
}

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

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

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

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

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

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

void App::emitHeadlampOff() {
    // Send HeadlampOff event for all application
    this->send_event(kListEventName[Event_HeadlampOff]);
}

void App::emitHeadlampOn() {
    // Send HeadlampOn event for all application
    this->send_event(kListEventName[Event_HeadlampOn]);
}

void App::emitParkingBrakeOff() {
    // Send ParkingBrakeOff event for all application
    this->send_event(kListEventName[Event_ParkingBrakeOff]);
}

void App::emitParkingBrakeOn() {
    // Send ParkingBrakeOn event for all application
    this->send_event(kListEventName[Event_ParkingBrakeOn]);
}

void App::emitLightstatusBrakeOff() {
    // Send LightstatusBrakeOff event for all application
    this->send_event(kListEventName[Event_LightstatusBrakeOff]);
}

void App::emitLightstatusBrakeOn() {
    // Send LightstatusBrakeOn event for all application
    this->send_event(kListEventName[Event_LightstatusBrakeOn]);
}

void App::emitCarStop() {
    // Send CarStop event for all application
    this->send_event(kListEventName[Event_CarStop]);
}

void App::emitCarRun() {
    // Send CarRun event for all application
    this->send_event(kListEventName[Event_CarRun]);
}

result<int> App::api_request_surface(char const *drawing_name) {
   auto lid = this->layers.get_layer_id(std::string(drawing_name));
   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", drawing_name);
      if(!lid){
          return Err<int>("Drawing name does not match any role, Fallback is disabled");
      }
   }

   auto rname = this->lookup_id(drawing_name);
   if (!rname) {
      // name does not exist yet, allocate surface id...
      auto id = int(this->id_alloc.generate_id(drawing_name));
      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);
      }

#if 0 // @@@@@
      // TODO:
      // This process will be implemented in SystemManager
      {
          // Generate app id
          auto id = int(this->app_id_alloc_.generate_id(drawing_name));
          this->appname2appid_[drawing_name] = id;
      }
#endif

      // Set map of (role, surface_id)
      std::string role = this->app2role_[std::string(drawing_name)];
      this->role2surfaceid_[role] = id;

      // Set map of (role, app)
      // If the new app which has the same role which is had by existing app is requested,
      // the role is given to the new app.
      this->role2app_[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 *App::api_request_surface(char const *drawing_name,
                                     char const *ivi_id) {
   ST();

   auto lid = this->layers.get_layer_id(std::string(drawing_name));
   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", drawing_name);
      if(!lid){
          return "Drawing name does not match any role, Fallback is disabled";
      }
   }

   auto rname = this->lookup_id(drawing_name);

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

   // register pair drawing_name and ivi_id
   this->id_alloc.register_name_id(drawing_name, 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();

   return nullptr;
}

result<json_object *> App::api_get_display_info() {
   // Check controller
   if (!this->controller) {
      return Err<json_object *>("ivi_controller global 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));

   return Ok<json_object *>(object);
}

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

   // Check drawing name, surface/layer id
   auto const &surface_id = this->lookup_id(drawing_name);
   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!");
   }

   auto o_state = *this->layers.get_layout_state(*surface_id);
   if (o_state == nullptr) {
      return Err<json_object *>("Could not find layer for surface");
   }

   // 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);
}

result<json_object *> App::api_get_car_info(char const *label) {
    HMI_DEBUG("wm", "called");

    json_object *j_in  = nullptr;
    json_object *j_out = nullptr;

    if (0 == strcmp("parking_brake_status", label)) {
        // Get parking brake status
        json_bool val = this->crr_car_info_.parking_brake_stt;
        j_in = json_object_new_boolean(val);
    }
    else if (0 == strcmp("accelerator.pedal.position", label)) {
        // Get accelerator pedal position
        double val = this->crr_car_info_.accel_pedal_pos;
        j_in = json_object_new_double(val);
    }
    else if (0 == strcmp("car_state", label)) {
        // Get car state
        const char* val = this->crr_car_info_.car_stt;
        j_in = json_object_new_string(val);
    }
    else if (0 == strcmp("lightstatus.brake", label)) {
        // Get lightstatus brake status
        json_bool val = this->crr_car_info_.lightstatus_brake_stt;
        j_in = json_object_new_boolean(val);
    }
    else {
       return Err<json_object *>("Car info does not exist");
    }

    // Create output object
    j_out = json_object_new_object();
    json_object_object_add(j_out, "value", j_in);

    return Ok<json_object *>(j_out);
}

void App::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, "MediaPlayer"))
          || (0 == strcmp(label, "Music"))
          || (0 == strcmp(label, "Navigation"))) {
        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();

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

void App::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, "MediaPlayer"))
          || (0 == strcmp(label, "Music"))
          || (0 == strcmp(label, "Navigation"))) {

         // 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();

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

void App::deactivate(std::string role) {
    std::string app = this->role2app_[role];
    auto const &id = this->lookup_id(app.c_str());
    if (!id) {
      HMI_ERROR("wm", "Surface does not exist");
      return;
    }
    HMI_DEBUG("wm", "Deactivate role:%s (app:%s)",
              role.c_str(), app.c_str());

    this->deactivate(*id);
}

void App::deactivate_main_surface() {
   this->layers.main_surface = -1;
   this->allocateWindowResource("deactivate", this->layers.main_surface_name.c_str(),
                                nullptr, nullptr,
                                [](const char*){});
}

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

void controller_hooks::surface_removed(uint32_t surface_id) {
   this->app->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*/) {}

int App::allocateSurface() {
    HMI_DEBUG("wm", "Call");

    // Get current/previous layers
    LayoutManager::TypeLayers crr_layers = this->lm_.getCurrentLayers();
    LayoutManager::TypeLayers prv_layers = this->lm_.getPreviousLayers();

    // Update resource of all layers
    for (auto itr_layers = crr_layers.begin();
         itr_layers != crr_layers.end(); ++itr_layers) {
        // Get layer
        std::string layer = itr_layers->first;
        HMI_DEBUG("wm", "Try to update resource in %s layer", layer.c_str());

        // If layout is changed, update resouce
        if (this->lm_.isLayoutChanged(layer.c_str())) {
            // Get current/previous layout
            LayoutManager::TypeLayouts crr_layout = itr_layers->second;
            LayoutManager::TypeLayouts prv_layout = prv_layers[layer];

            // Get current/previous layout name
            std::string crr_layout_name = crr_layout.begin()->first;
            std::string prv_layout_name = prv_layout.begin()->first;
            HMI_DEBUG("wm", "layout name crr:%s prv:%s",
                      crr_layout_name.c_str(), prv_layout_name.c_str());

            // Get current/previous ares
            LayoutManager::TypeAreas crr_areas = crr_layout[crr_layout_name];
            LayoutManager::TypeAreas prv_areas = prv_layout[prv_layout_name];

            // Create previous displayed role list
            std::string prv_area_name;
            std::vector<std::string> prv_role_list;
            for (auto itr_areas = prv_areas.begin();
                 itr_areas != prv_areas.end(); ++itr_areas) {
                prv_area_name = itr_areas->first;
                prv_role_list.push_back(prv_areas[prv_area_name]["role"]);
                HMI_DEBUG("wm", "previous displayed role:%s",
                          prv_areas[prv_area_name]["role"].c_str());
            }

            // Allocate surface for each area
            std::string crr_area_name;
            std::string crr_role_name;
            LayoutManager::TypeRolCtg crr_rol_ctg;
            for (auto itr_areas = crr_areas.begin();
                 itr_areas != crr_areas.end(); ++itr_areas) {
                crr_area_name = itr_areas->first;
                crr_rol_ctg = itr_areas->second;

                // Get role of current area
                if ("category" == crr_rol_ctg.begin()->first) {
                    // If current area have category
                    // Get category name
                    std::string crr_ctg = crr_rol_ctg.begin()->second;

                    // Serch relevant role from previous displayed role list
                    for (auto itr_role = prv_role_list.begin();
                         itr_role != prv_role_list.end(); ++itr_role) {
                        std::string prv_ctg = this->pm_.roleToCategory((*itr_role).c_str());
                        if (crr_ctg == prv_ctg) {
                            // First discovered role is set to current role
                            crr_role_name = *itr_role;

                            // Delete used role for other areas
                            // which have same category
                            prv_role_list.erase(itr_role);

                            break;
                        }
                    }
                }
                else {
                    crr_role_name = itr_areas->second["role"];
                }
                HMI_DEBUG("wm", "Allocate surface for area:%s role:%s",
                          crr_area_name.c_str(), crr_role_name.c_str());

                // Deactivate non-displayed role
                std::string prv_role_name;
                if (crr_layout_name == prv_layout_name) {
                    HMI_DEBUG("wm", "Current layout is same with previous");

                    // Deactivate previous role in same area
                    // if it is different with current
                    prv_role_name = prv_areas[crr_area_name]["role"];
                    if (crr_role_name != prv_role_name) {
                        this->deactivate(prv_role_name);
                    }
                }
                else {
                    HMI_DEBUG("wm", "Current layout is different with previous");

                    if ("none" != prv_layout_name) {
                        // Deactivate previous role in all area in previous layout
                        // if it is different with current role
                        for(auto itr = prv_areas.begin(); itr != prv_areas.end(); ++itr) {
                            prv_role_name = itr->second["role"].c_str();
                            if (crr_role_name != prv_role_name) {
                                this->deactivate(prv_role_name);
                            }
                        }
                    }
                }

                // Set surface for displayed role
                if ("none" != crr_layout_name) {
                    // If current layout is not "none",
                    // set surface for current role
                    this->setSurfaceSize(crr_role_name.c_str(), crr_area_name.c_str());

                    // TODO:
                    // This API is workaround.
                    // Resource manager should manage each resource infomations
                    // according to architecture document.
                    this->lm_.updateArea(layer.c_str(), crr_role_name.c_str(), crr_area_name.c_str());
                }
            }
        }
    }
    return 0;
}

void App::setSurfaceSize(const char* role, const char* area) {
    HMI_DEBUG("wm", "role:%s area:%s", role, area);

    // Get size of current area
    compositor::rect size = this->lm_.getAreaSize(area);

    // Set destination to the display rectangle
    int surface_id = this->role2surfaceid_[role];

    if (!this->controller->surface_exists(surface_id)) {
        // Block until all pending request are processed by wayland display server
        // because waiting for the surface of new app is created
        this->display->roundtrip();
    }
    auto &s = this->controller->surfaces[surface_id];
    s->set_destination_rectangle(size.x, size.y, size.w, size.h);
    this->layout_commit();

    // Update area information
    this->area_info[surface_id].x = size.x;
    this->area_info[surface_id].y = size.y;
    this->area_info[surface_id].w = size.w;
    this->area_info[surface_id].h = size.h;
    HMI_DEBUG("wm", "Surface rect { %d, %d, %d, %d }",
              size.x, size.y, size.w, size.h);

    // Emit syncDraw event
    const char* app = this->role2app_[role].c_str();
    this->emit_syncdraw(app, area,
                        size.x, size.y, size.w, size.h);

    // Enqueue flushDraw event
    this->enqueue_flushdraw(surface_id);
}

void App::setAccelPedalPos(double val) {
    this->crr_car_info_.accel_pedal_pos = val;
}

extern const char* kDefaultAppDb;
int App::loadAppDb() {
    HMI_DEBUG("wm", "Call");

    // 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/app.db");
    }

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

    // Perse apps
    HMI_DEBUG("wm", "Perse apps");
    json_object* json_cfg;
    if (!json_object_object_get_ex(json_obj, "apps", &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);
        HMI_DEBUG("wm", "> json_tmp dump:%s", json_object_get_string(json_tmp));

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

        const char* role = jh::getStringFromJson(json_tmp, "role");
        if (nullptr == role) {
            HMI_ERROR("wm", "Parse Error!!");
            return -1;
        }
        HMI_DEBUG("wm", "> role:%s", role);

        this->app2role_[app] = std::string(role);
    }

    // Check
    for(auto itr = this->app2role_.begin();
      itr != this->app2role_.end(); ++itr) {
        HMI_DEBUG("wm", "app:%s role:%s",
                  itr->first.c_str(), itr->second.c_str());
    }

    // Release json_object
    json_object_put(json_obj);

    return 0;
}


const char* kDefaultAppDb = "{ \
    \"apps\": [ \
        { \
            \"name\": \"HomeScreen\", \
            \"role\": \"homescreen\" \
        }, \
        { \
            \"name\": \"Music\", \
            \"role\": \"music\" \
        }, \
        { \
            \"name\": \"MediaPlayer\", \
            \"role\": \"music\" \
        }, \
        { \
            \"name\": \"Video\", \
            \"role\": \"video\" \
        }, \
        { \
            \"name\": \"VideoPlayer\", \
            \"role\": \"video\" \
        }, \
        { \
            \"name\": \"WebBrowser\", \
            \"role\": \"browser\" \
        }, \
        { \
            \"name\": \"Radio\", \
            \"role\": \"radio\" \
        }, \
        { \
            \"name\": \"Phone\", \
            \"role\": \"phone\" \
        }, \
        { \
            \"name\": \"Navigation\", \
            \"role\": \"map\" \
        }, \
        { \
            \"name\": \"HVAC\", \
            \"role\": \"hvac\" \
        }, \
        { \
            \"name\": \"Settings\", \
            \"role\": \"settings\" \
        }, \
        { \
            \"name\": \"Dashboard\", \
            \"role\": \"dashboard\" \
        }, \
        { \
            \"name\": \"POI\", \
            \"role\": \"poi\" \
        }, \
        { \
            \"name\": \"Mixer\", \
            \"role\": \"mixer\" \
        } \
    ] \
}";


}  // namespace wm