/*
 * etcpmon_gui.h - ETCP Monitor GUI Header
 */

#ifndef ETCPMON_GUI_H
#define ETCPMON_GUI_H

/* Exclude winsock from windows.h to avoid conflict with winsock2.h */
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

/* Windows headers */
#include <windows.h>
#include <stdint.h>

/* Client structure is defined in etcpmon_client.h */
struct etcpmon_client;
struct etcpmon_conn_info;
struct etcpmon_rsp_metrics;
struct etcpmon_link_metrics;

/* Graph constants */
#include "etcpmon_graph.h"

#ifdef __cplusplus
extern "C" {
#endif

/* Window class name */
#define ETCPMON_WINDOW_CLASS "ETCPMonMainWindow"

/* Control IDs */
#define IDC_STATIC              -1
#define IDC_EDIT_ADDR           100
#define IDC_EDIT_PORT           101
#define IDC_BTN_CONNECT         102
#define IDC_BTN_DISCONNECT      103
#define IDC_LIST_CONNECTIONS    104
#define IDC_TIMER_UPDATE        105

/* ETCP Metrics control IDs */
#define IDC_EDIT_ETCP_NAME      200
#define IDC_EDIT_ETCP_RTT_LAST  201
#define IDC_EDIT_ETCP_RTT_AVG10 202
#define IDC_EDIT_ETCP_RTT_AVG100 203
#define IDC_EDIT_ETCP_JITTER    204
#define IDC_EDIT_ETCP_BYTES_SENT 205
#define IDC_EDIT_ETCP_RETRANS   206
#define IDC_EDIT_ETCP_ACKS      207
#define IDC_EDIT_ETCP_INFLIGHT  208
#define IDC_EDIT_ETCP_LINKS     209

/* TUN Metrics control IDs */
#define IDC_EDIT_TUN_READ_BYTES  300
#define IDC_EDIT_TUN_WRITE_BYTES 301
#define IDC_EDIT_TUN_READ_PKTS   302
#define IDC_EDIT_TUN_WRITE_PKTS  303
#define IDC_EDIT_TUN_READ_ERRS   304
#define IDC_EDIT_TUN_WRITE_ERRS  305

/* Link list control ID */
#define IDC_LIST_LINKS          400

/* Graph control IDs */
#define IDC_GRAPH              500
#define IDC_STATIC_GRAPH       501
#define IDC_LIST_CHANNELS      502

/* Channel block IDs - 8 channels, 4 columns x 2 rows */
#define IDC_CH_NAME_0         510
#define IDC_CH_VALUE_0        520
#define IDC_CH_CHECK_0        530
#define IDC_CH_NAME_1         511
#define IDC_CH_VALUE_1        521
#define IDC_CH_CHECK_1        531
#define IDC_CH_NAME_2         512
#define IDC_CH_VALUE_2        522
#define IDC_CH_CHECK_2        532
#define IDC_CH_NAME_3         513
#define IDC_CH_VALUE_3        523
#define IDC_CH_CHECK_3        533
#define IDC_CH_NAME_4         514
#define IDC_CH_VALUE_4        524
#define IDC_CH_CHECK_4        534
#define IDC_CH_NAME_5         515
#define IDC_CH_VALUE_5        525
#define IDC_CH_CHECK_5        535
#define IDC_CH_NAME_6         516
#define IDC_CH_VALUE_6        526
#define IDC_CH_CHECK_6        536
#define IDC_CH_NAME_7         517
#define IDC_CH_VALUE_7        527
#define IDC_CH_CHECK_7        537

/* Main application structure */
struct etcpmon_app {
    HINSTANCE hInstance;
    HWND hWndMain;
    HWND hWndStatus;

    HPEN hGraphPens[GRAPH_METRICS_COUNT];
    /* Connection controls */
    HWND hEditAddr;
    HWND hEditPort;
    HWND hBtnConnect;
    HWND hBtnDisconnect;
    HWND hListConnections;
    
    /* ETCP metrics controls */
    HWND hEditEtcpName;
    HWND hEditEtcpRttLast;
    HWND hEditEtcpRttAvg10;
    HWND hEditEtcpRttAvg100;
    HWND hEditEtcpJitter;
    HWND hEditEtcpBytesSent;
    HWND hEditEtcpRetrans;
    HWND hEditEtcpAcks;
    HWND hEditEtcpInflight;
    HWND hEditEtcpLinks;
    
    /* TUN metrics controls */
    HWND hEditTunReadBytes;
    HWND hEditTunWriteBytes;
    HWND hEditTunReadPkts;
    HWND hEditTunWritePkts;
    HWND hEditTunReadErrs;
    HWND hEditTunWriteErrs;
    
    /* Links list */
    HWND hListLinks;
    
    /* Graph controls (managed by graph module) */
    HWND hGraphWnd;
    HWND hChannelName[GRAPH_METRICS_COUNT];
    HWND hChannelValue[GRAPH_METRICS_COUNT];
    HWND hChannelCheck[GRAPH_METRICS_COUNT];
    int graph_cursor_x;
    int graph_cursor_y;
    int graph_cursor_active;
    
    /* Client state - pointer to actual client structure */
    struct etcpmon_client* client;
    
    /* Timer ID */
    UINT_PTR updateTimer;
    DWORD last_poll_time;
    int isConnected;
};

/* Initialize application */
int etcpmon_gui_init(struct etcpmon_app* app, HINSTANCE hInstance);

/* Create main window */
HWND etcpmon_gui_create_window(struct etcpmon_app* app);

/* Run message loop */
int etcpmon_gui_run(struct etcpmon_app* app);

/* Cleanup */
void etcpmon_gui_cleanup(struct etcpmon_app* app);

/* Update connection status display */
void etcpmon_gui_set_status(struct etcpmon_app* app, const char* text);

/* Update connection list */
void etcpmon_gui_update_conn_list(struct etcpmon_app* app, 
                                   struct etcpmon_conn_info* list, 
                                   uint8_t count);

/* Update metrics display */
void etcpmon_gui_update_metrics(struct etcpmon_app* app,
                                struct etcpmon_rsp_metrics* metrics,
                                struct etcpmon_link_metrics* links,
                                uint8_t links_count);

/* Clear metrics display */
void etcpmon_gui_clear_metrics(struct etcpmon_app* app);

/* Update graph with new metrics */
void etcpmon_gui_update_graph(struct etcpmon_app* app,
                              struct etcpmon_rsp_metrics* metrics);

#ifdef __cplusplus
}
#endif

#endif /* ETCPMON_GUI_H */