#include <glib.h>

#ifndef UI_INTERFACE_H_
#define UI_INTERFACE_H_

typedef int (*ui_signal_set_text_t)(char *text, int length);

typedef struct {

    /** core program -> UI */
    ui_signal_set_text_t           ui_signal_set_text;
} ui_interface_t;

extern ui_interface_t ui_interface;

/*******************************************************************************
 * Pipe interface between GUI thread and other thread
 ******************************************************************************/

typedef gboolean (*pipe_input_cb_t) (gint source, gpointer user_data);

typedef struct {
    int             source_fd;
    guint           pipe_input_id;
    GIOChannel     *pipe_channel;

    pipe_input_cb_t input_cb;
    gpointer        user_data;
} pipe_input_t;

int ui_pipe_new(int pipe_fd[2], pipe_input_cb_t input_cb, gpointer user_data);

int ui_pipe_write_message(int pipe_fd, const uint16_t message_type,
                          const void * const message, const uint16_t message_size);

typedef struct {
    uint16_t message_size;
    uint16_t message_type;
} pipe_input_header_t;

enum ui_pipe_messages_id_e {
    /* Other thread -> GUI interface ids */
    UI_PIPE_CONNECTION_FAILED,
    UI_PIPE_CONNECTION_LOST,
    UI_PIPE_XML_DEFINITION,
    UI_PIPE_UPDATE_SIGNAL_LIST,

    /* GUI -> other threads */
    UI_PIPE_DISCONNECT_EVT
};

typedef struct {
    char  *xml_definition;
    size_t xml_definition_length;
} pipe_xml_definition_message_t;

typedef struct {
    GList *signal_list;
} pipe_new_signals_list_message_t;

#endif /* UI_INTERFACE_H_ */