#ifndef __INCLUDED_STEAM_OVERLAY_H__
#define __INCLUDED_STEAM_OVERLAY_H__

#include "../dll/base.h"
#include <map>
#include <queue>

static constexpr size_t max_chat_len = 768;

enum window_state
{
    window_state_none           = 0,
    window_state_show           = 1<<0,
    window_state_invite         = 1<<1,
    window_state_join           = 1<<2,
    window_state_lobby_invite   = 1<<3,
    window_state_rich_invite    = 1<<4,
    window_state_send_message   = 1<<5,
    window_state_need_attention = 1<<6,
};

struct friend_window_state
{
    uint8 window_state;
    union // The invitation (if any)
    {
        uint64 lobbyId;
        char connect[k_cchMaxRichPresenceValueLength];
    };
    std::string chat_history;
    char chat_input[max_chat_len];
};

struct Friend_Less
{
    bool operator()(const Friend& lhs, const Friend& rhs) const
    {
        return lhs.id() < rhs.id();
    }
};

struct Notification
{
    static constexpr float width = 200.0;
    static constexpr float height = 60.0;
    static constexpr std::chrono::milliseconds fade_in   = std::chrono::milliseconds(2000);
    static constexpr std::chrono::milliseconds fade_out  = std::chrono::milliseconds(2000);
    static constexpr std::chrono::milliseconds show_time = std::chrono::milliseconds(6000) + fade_in + fade_out;
    static constexpr std::chrono::milliseconds fade_out_start = show_time - fade_out;
    static constexpr float r = 0.16;
    static constexpr float g = 0.29;
    static constexpr float b = 0.48;
    static constexpr float max_alpha = 0.5f;
    std::chrono::seconds start_time;
    std::string message;
};

#ifndef NO_OVERLAY

class Steam_Overlay
{
    Settings* settings;
    SteamCallResults* callback_results;
    SteamCallBacks* callbacks;
    RunEveryRunCB* run_every_runcb;
    Networking* network;

    // friend id, show client window (to chat and accept invite maybe)
    std::map<Friend, friend_window_state, Friend_Less> friends;

    bool setup_overlay_called;
    bool is_ready;
    bool show_overlay;
    ENotificationPosition notif_position;
    int h_inset, v_inset;

    // Callback infos
    std::queue<Friend> has_friend_action;
    std::vector<Notification> notifications;
    bool overlay_state_changed;

    Steam_Overlay(Steam_Overlay const&) = delete;
    Steam_Overlay(Steam_Overlay&&) = delete;
    Steam_Overlay& operator=(Steam_Overlay const&) = delete;
    Steam_Overlay& operator=(Steam_Overlay&&) = delete;

    static void steam_overlay_run_every_runcb(void* object);
    static void steam_overlay_callback(void* object, Common_Message* msg);

    void Callback(Common_Message* msg);
    void RunCallbacks();

    bool FriendHasLobby(uint64 friend_id);
    bool IHaveLobby();

    void NotifyUser(friend_window_state& friend_state, std::string const& message);

    // Right click on friend
    void BuildContextMenu(Friend const& frd, friend_window_state &state);
    // Double click on friend
    void BuildFriendWindow(Friend const& frd, friend_window_state &state);
    // Notifications like achievements, chat and invitations
    void BuildNotifications(int width, int height);
public:
    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking *network);

    ~Steam_Overlay();

    bool Ready() const;

    bool NeedPresent() const;

    void SetNotificationPosition(ENotificationPosition eNotificationPosition);

    void SetNotificationInset(int nHorizontalInset, int nVerticalInset);
    void SetupOverlay();

    void HookReady();

    void OverlayProc(int width, int height);

    void OpenOverlayInvite(CSteamID lobbyId);
    void OpenOverlay(const char* pchDialog);

    bool ShowOverlay() const;
    void ShowOverlay(bool state);

    void SetLobbyInvite(Friend friendId, uint64 lobbyId);
    void SetRichInvite(Friend friendId, const char* connect_str);

    void FriendConnect(Friend _friend);
    void FriendDisconnect(Friend _friend);

    void AddNotification(std::string const& message);
};

#else

class Steam_Overlay
{
public:
    Steam_Overlay(Settings* settings, SteamCallResults* callback_results, SteamCallBacks* callbacks, RunEveryRunCB* run_every_runcb, Networking *network) {}
    ~Steam_Overlay() {}

    bool Ready() const { return false; }

    bool NeedPresent() const { return false; }

    void SetNotificationPosition(ENotificationPosition eNotificationPosition) {}

    void SetNotificationInset(int nHorizontalInset, int nVerticalInset) {}
    void SetupOverlay() {}

    void HookReady(void* hWnd) {}

    void OverlayProc(int width, int height) {}

    void OpenOverlayInvite(CSteamID lobbyId) {}
    void OpenOverlay(const char* pchDialog) {}

    void ShowOverlay(bool state) {}

    void SetLobbyInvite(Friend friendId, uint64 lobbyId) {}
    void SetRichInvite(Friend friendId, const char* connect_str) {}

    void FriendConnect(Friend _friend) {}
    void FriendDisconnect(Friend _friend) {}
};

#endif

#endif//__INCLUDED_STEAM_OVERLAY_H__