#include <stdlib.h>
#include <string.h>

#include "txt_separator.h"
#include "txt_io.h"
#include "txt_main.h"
#include "txt_window.h"

static void TXT_SeparatorSizeCalc(TXT_UNCAST_ARG(separator))
{
    TXT_CAST_ARG(txt_separator_t, separator);

    if (separator->label != NULL)
    {
        // Minimum width is the string length + two spaces for padding

        separator->widget.w = strlen(separator->label) + 2;
    }
    else
    {
        separator->widget.w = 0;
    }

    separator->widget.h = 1;
}

static void TXT_SeparatorDrawer(TXT_UNCAST_ARG(separator), int selected)
{
    TXT_CAST_ARG(txt_separator_t, separator);
    int i;
    int x, y;
    int w;

    w = separator->widget.w;

    TXT_GetXY(&x, &y);

    // Draw separator.  Go back one character and draw two extra
    // to overlap the window borders.

    TXT_DrawSeparator(x-2, y, w + 4);
    
    if (separator->label != NULL)
    {
        TXT_GotoXY(x, y);

        TXT_BGColor(TXT_COLOR_BLUE, 0);
        TXT_FGColor(TXT_COLOR_BRIGHT_GREEN);
        TXT_DrawString(" ");
        TXT_DrawString(separator->label);
        TXT_DrawString(" ");
    }
}

static void TXT_SeparatorDestructor(TXT_UNCAST_ARG(separator))
{
    TXT_CAST_ARG(txt_separator_t, separator);

    free(separator->label);
}

txt_widget_class_t txt_separator_class =
{
    TXT_SeparatorSizeCalc,
    TXT_SeparatorDrawer,
    NULL,
    TXT_SeparatorDestructor,
};

txt_separator_t *TXT_NewSeparator(char *label)
{
    txt_separator_t *separator;

    separator = malloc(sizeof(txt_separator_t));

    TXT_InitWidget(separator, &txt_separator_class);
    separator->widget.selectable = 0;

    if (label != NULL)
    {
        separator->label = strdup(label);
    }
    else
    {
        separator->label = NULL;
    }

    return separator;
}