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+/*
+ * Copyright (C) 2017 Mentor Graphics Development (Deutschland) GmbH
+ *
+ * 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.
+ */
+
+#ifndef TMCAGLWM_APP_HPP
+#define TMCAGLWM_APP_HPP
+
+#include <json-c/json.h>
+
+#include <atomic>
+#include <memory>
+#include <unordered_map>
+#include <unordered_set>
+#include <experimental/optional>
+
+#include "afb_binding_api.hpp"
+#include "config.hpp"
+#include "controller_hooks.hpp"
+#include "layers.hpp"
+#include "layout.hpp"
+#include "policy.hpp"
+#include "result.hpp"
+#include "wayland.hpp"
+
+namespace wl {
+struct display;
+}
+
+namespace genivi {
+struct controller;
+}
+
+namespace wm {
+
+using std::experimental::optional;
+
+struct id_allocator {
+   unsigned next = 1;
+
+   // Surfaces that where requested but not yet created
+   std::unordered_map<unsigned, std::string> id2name;
+   // std::unordered_set<unsigned> pending_surfaces;
+   std::unordered_map<std::string, unsigned> name2id;
+
+   id_allocator(id_allocator const &) = delete;
+   id_allocator(id_allocator &&) = delete;
+   id_allocator &operator=(id_allocator const &);
+   id_allocator &operator=(id_allocator &&) = delete;
+
+   // Insert and return a new ID
+   unsigned generate_id(std::string const &name) {
+      unsigned sid = this->next++;
+      this->id2name[sid] = name;
+      // this->pending_surfaces.insert({sid});
+      this->name2id[name] = sid;
+      logdebug("allocated new id %u with name %s", sid, name.c_str());
+      return sid;
+   }
+
+   // Lookup by ID or by name
+   optional<unsigned> lookup(std::string const &name) const {
+      auto i = this->name2id.find(name);
+      return i == this->name2id.end() ? nullopt : optional<unsigned>(i->second);
+   }
+
+   optional<std::string> lookup(unsigned id) const {
+      auto i = this->id2name.find(id);
+      return i == this->id2name.end() ? nullopt
+                                       : optional<std::string>(i->second);
+   }
+
+   // Remove a surface id and name
+   // I don't think I will need this, do I?
+   void remove_id(std::string const &name) {
+      auto i = this->name2id.find(name);
+      if (i != this->name2id.end()) {
+         this->id2name.erase(i->second);
+         this->name2id.erase(i);
+      }
+   }
+
+   void remove_id(unsigned id) {
+      auto i = this->id2name.find(id);
+      if (i != this->id2name.end()) {
+         this->name2id.erase(i->second);
+         this->id2name.erase(i);
+      }
+   }
+};
+
+struct App {
+   struct binding_api api;
+   struct controller_hooks chooks;
+
+   // This is the one thing, we do not own.
+   struct wl::display *display;
+
+   std::unique_ptr<struct genivi::controller> controller;
+   std::vector<std::unique_ptr<struct wl::output>> outputs;
+
+   struct config config;
+
+   // track current layouts separately
+   layer_map layers;
+
+   // ID allocation and proxy methods for lookup
+   struct id_allocator id_alloc;
+
+   // Set by AFB API when wayland events need to be dispatched
+   std::atomic<bool> pending_events;
+
+   std::vector<int> pending_end_draw;
+
+   Policy policy;
+
+   explicit App(wl::display *d);
+   ~App() = default;
+
+   App(App const &) = delete;
+   App &operator=(App const &) = delete;
+   App(App &&) = delete;
+   App &operator=(App &&) = delete;
+
+   int init();
+
+   int dispatch_events();
+   int dispatch_pending_events();
+
+   void set_pending_events();
+
+   result<int> api_request_surface(char const *drawing_name);
+   char const *api_activate_surface(char const *drawing_name);
+   char const *api_deactivate_surface(char const *drawing_name);
+   char const *api_enddraw(char const *drawing_name);
+   void api_ping();
+
+   // Events from the compositor we are interested in
+   void surface_created(uint32_t surface_id);
+   void surface_removed(uint32_t surface_id);
+
+private:
+   optional<int> lookup_id(char const *name);
+   optional<std::string> lookup_name(int id);
+
+   bool pop_pending_events();
+
+   void enqueue_flushdraw(int surface_id);
+   void check_flushdraw(int surface_id);
+
+   int init_layers();
+
+   void surface_set_layout(int surface_id, optional<int> sub_surface_id = nullopt);
+   void layout_commit();
+
+   // TMC WM Events to clients
+   void emit_activated(char const *label);
+   void emit_deactivated(char const *label);
+   void emit_syncdraw(char const *label);
+   void emit_flushdraw(char const *label);
+   void emit_visible(char const *label, bool is_visible);
+   void emit_invisible(char const *label);
+   void emit_visible(char const *label);
+
+   void activate(int id);
+   void deactivate(int id);
+   void deactivate_main_surface();
+
+   bool can_split(struct LayoutState const &state, int new_id);
+   void try_layout(struct LayoutState &state,
+                   struct LayoutState const &new_layout,
+                   std::function<void(LayoutState const &nl)> apply);
+};
+
+}  // namespace wm
+
+#endif  // TMCAGLWM_APP_HPP