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

#include "eve.h"
#include "eve_kbd.h"
#include "eve_font.h"

#include "screen/window.h"
#include "screen/page.h"

#include "widget.h"

int eve_freew_init(EVEFreeWidget *widget, EVERect *g, EVEPage *page, eve_freew_draw_t draw, eve_freew_touch_t touch, eve_kbd_input_handler_t putc) {
    EVEWidget *_widget = &widget->w;

    memset(widget, 0, sizeof(EVEFreeWidget));
    eve_widget_init(_widget, EVE_WIDGET_TYPE_FREE, g, page, eve_freew_draw, eve_freew_touch, putc);
    widget->_draw = draw;
    widget->_touch = touch;

    return EVE_OK;
}

void eve_freew_set_uievt_handler(EVEFreeWidget *widget, eve_freew_uievt_t handler) {
    widget->_uievt = handler;
}

int eve_freew_create(EVEWidget *_widget, EVEWidgetSpec *spec, EVEPage *page) {
    EVEFreeWidget *widget = (EVEFreeWidget *)_widget;
    EVEFreeSpec *tspec = &spec->tspec.free;
    int rv;

    rv = eve_freew_init(widget, &spec->g, page, tspec->draw, tspec->touch, tspec->putc);
    return rv;
}

uint8_t eve_freew_draw(EVEWidget *_widget, uint8_t tag0) {
    EVEFreeWidget *widget = (EVEFreeWidget *)_widget;

    _widget->tag0 = tag0;
    _widget->tagN = tag0;
    eve_cmd_dl(SAVE_CONTEXT());
    widget->_draw(widget);
    eve_cmd_dl(RESTORE_CONTEXT());

    return _widget->tagN;
}

int eve_freew_touch(EVEWidget *_widget, EVETouch *touch, uint16_t evt) {
    EVEFreeWidget *widget = (EVEFreeWidget *)_widget;
    int rv;

    /* widget received non-touch event */
    if (evt & EVE_TOUCH_ETYPE_EXT) {
        evt &= ~EVE_TOUCH_ETYPE_EXT;
        if (widget->_uievt) widget->_uievt(widget, evt);

        /* always return 0 for non-touch events */
        return 0;
    }

    rv = widget->_touch(widget, touch, evt);
    return rv;
}

uint8_t eve_freew_tag0(EVEFreeWidget *widget) {
    EVEWidget *_widget = &widget->w;

    return _widget->tag0;
}

void eve_freew_tag(EVEFreeWidget *widget, uint8_t tag_opt) {
    EVEWidget *_widget = &widget->w;

    if (_widget->tagN != EVE_NOTAG) {
        eve_tag_set_opt(_widget->tagN, tag_opt);
        eve_cmd_dl(TAG(_widget->tagN));
        _widget->tagN++;
    }
}

void eve_freew_tag_idx(EVEFreeWidget *widget, uint8_t i) {
    EVEWidget *_widget = &widget->w;
    uint8_t tag = _widget->tag0;

    if (tag != EVE_NOTAG) {
        tag += i;

        /* prevents overflow */
        if ((tag >= _widget->tag0) && (tag < _widget->tagN)) {
            eve_cmd_dl(TAG(tag));
        }
    }
}

uint8_t eve_freew_get_tag_idx(EVEFreeWidget *widget, uint8_t tag) {
    EVEWidget *_widget = &widget->w;

    return tag - _widget->tag0;
}