// -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
// vim: sw=4:ts=8:sts=4
#include <stdio.h>
#include <mb.h>
#include <string.h>
//#include "menu.h"
#include "mb_af.h"
#include "mb_ani_menu.h"
static void mb_animated_menu_update(mb_animated_menu_t *m);
static void set_text(coord_t *g, char *text)
{
    geo_t *geo;
    shape_t *shape;

    FOR_COORD_MEMBERS(g, geo) {
        shape = geo_get_shape(geo);
#ifdef SH_TEXT
        if(shape->obj.obj_type == MBO_TEXT) {
		sh_text_set_text(shape, text);
        }
#endif
    }
}

static void mb_animated_menu_fillMenuContent(mb_animated_menu_t *m)
{
    int i;
    coord_t *textgroup;
    coord_t *group;
    coord_t *lightbar;

    // fill new item
    for(i=0;i<8;i++) {
        group = (coord_t *) m->objects[m->items[i]];
	if (i < m->max)
	        set_text(group, m->titles[m->top+i]);
	else
	        set_text(group, "");
    	rdman_coord_changed(MBAF_RDMAN(m->app),group);
    }


    textgroup = (coord_t *) m->objects[m->items[i]];
    coord_hide(textgroup);
    rdman_coord_changed(MBAF_RDMAN(m->app),textgroup);

    lightbar = (coord_t *) m->lightbar;
    group = (coord_t *) m->objects[m->cur];
    coord_y(lightbar) = coord_y(group);
    rdman_coord_changed(MBAF_RDMAN(m->app),lightbar);
    rdman_redraw_changed(MBAF_RDMAN(m->app));
}

static void mb_animated_menu_complete(event_t *ev,void *arg)
{
    mb_animated_menu_t *m = (mb_animated_menu_t *) arg;

    m->ready++;
}

static void mb_animated_menu_fillMenuContentUp(mb_animated_menu_t *m)
{
    int i;
    coord_t *textgroup;
    coord_t *group;
    coord_t *lightbar;
    int tmp;
    mb_timeval_t start, playing, now;
    mb_progm_t *progm;
    mb_word_t *word;


    // fill new item
    group = (coord_t *) m->objects[m->items[8]];
    set_text(group, m->titles[m->top]);

    m->progm = progm = mb_progm_new(2, MBAF_RDMAN(m->app));
    MB_TIMEVAL_SET(&start, 0, 0);
    MB_TIMEVAL_SET(&playing, 0, m->speed);
    word = mb_progm_next_word(progm, &start, &playing);
    get_now(&now);

    for(i=0;i<7;i++) {
	//shift to the next item
        textgroup = (coord_t *) m->objects[m->items[i]];
	mb_shift_new(0,m->menus_y[i+1]-coord_y(textgroup), textgroup,word);
    }
    // fade out the item[7]
    textgroup = (coord_t *) m->objects[m->items[7]];
    mb_shift_new(0,100, textgroup,word);

    // fade in the item[8]
    textgroup = (coord_t *) m->objects[m->items[8]];
    group = (coord_t *) m->objects[m->items[0]];
    coord_y(textgroup) = m->menus_y[0]-100;
    coord_show(textgroup);
    mb_shift_new(0,100, textgroup,word);

    lightbar = (coord_t *) m->lightbar;
    mb_shift_new(0,m->menus_y[m->cur]-coord_y(lightbar),lightbar,word);

    MB_TIMEVAL_SET(&start, 0, m->speed);
    MB_TIMEVAL_SET(&playing, 0, 0);
    word = mb_progm_next_word(progm, &start, &playing);
    textgroup = (coord_t *) m->objects[m->items[7]];
    mb_visibility_new(VIS_HIDDEN, textgroup,word);

    mb_progm_free_completed(progm);
    m->ready--;
    subject_add_observer(mb_progm_get_complete(progm), mb_animated_menu_complete,m);
    mb_progm_start(progm, X_MB_tman(MBAF_RDMAN(m->app)->rt), &now);
    rdman_redraw_changed(MBAF_RDMAN(m->app));
    tmp = m->items[8];
    for(i=8;i>0;i--) {
	m->items[i] = m->items[i-1];
    }
    m->items[0] = tmp;
}


static void mb_animated_menu_fillMenuContentDown(mb_animated_menu_t *m)
{
    int i;
    int tmp;
    mb_timeval_t start, playing, now;
    mb_progm_t *progm;
    mb_word_t *word;


    // fill new item
    set_text((coord_t *)m->objects[m->items[8]], m->titles[m->top+7]);

    m->progm = progm = mb_progm_new(2, MBAF_RDMAN(m->app));
    MB_TIMEVAL_SET(&start, 0, 0);
    MB_TIMEVAL_SET(&playing, 0, m->speed);
    word = mb_progm_next_word(progm, &start, &playing);
    get_now(&now);

    for(i=1;i<8;i++) {
	//shift to the next item
	mb_shift_new(0,m->menus_y[i-1]-coord_y((coord_t *)m->objects[m->items[i]]), (coord_t *) m->objects[m->items[i]],word);
    }
    // fade out the item[0]
    mb_shift_new(0,-100, (coord_t *)m->objects[m->items[0]],word);

    // fade in the item[8]
    coord_y((coord_t *)m->objects[m->items[8]]) = m->menus_y[7]+100;
    coord_show(((coord_t *)(m->objects[m->items[8]])));
    mb_shift_new(0,-100, (coord_t *)m->objects[m->items[8]],word);

    mb_shift_new(0,m->menus_y[m->cur]-coord_y((coord_t *)m->lightbar),((coord_t *)(m->lightbar)),word);

    MB_TIMEVAL_SET(&start, 0, m->speed);
    MB_TIMEVAL_SET(&playing, 0, 0);
    word = mb_progm_next_word(progm, &start, &playing);
    mb_visibility_new(VIS_VISIBLE, (coord_t *) m->objects[m->items[0]],word);

    mb_progm_free_completed(progm);
    m->ready--;
    subject_add_observer(mb_progm_get_complete(progm), mb_animated_menu_complete,m);
    mb_progm_start(progm, X_MB_tman(MBAF_RDMAN(m->app)->rt), &now);
    rdman_redraw_changed(MBAF_RDMAN(m->app));
    tmp = m->items[0];
    for(i=0;i<8;i++) {
	m->items[i] = m->items[i+1];
    }
    m->items[8] = tmp;
}

void mb_animated_menu_moveLightBar(mb_animated_menu_t *m)
{
    mb_timeval_t start, playing, now;
    mb_progm_t *progm;
    mb_word_t *word;
    coord_t *lightbar;

    m->progm = progm = mb_progm_new(1, MBAF_RDMAN(m->app));
    MB_TIMEVAL_SET(&start, 0, 0);
    MB_TIMEVAL_SET(&playing, 0, m->speed);
    word = mb_progm_next_word(progm, &start, &playing);
    get_now(&now);

    lightbar = (coord_t *) m->lightbar;
    mb_shift_new(0,m->menus_y[m->cur]-coord_y(lightbar),lightbar,word);
    mb_progm_free_completed(progm);
    m->ready--;
    subject_add_observer(mb_progm_get_complete(progm), mb_animated_menu_complete,m);
    mb_progm_start(progm, X_MB_tman(MBAF_RDMAN(m->app)->rt), &now);
    rdman_redraw_changed(MBAF_RDMAN(m->app));
}

static void mb_animated_menu_up(mb_animated_menu_t *m)
{
    if (m->cur > 5) {
	m->cur--;
        mb_animated_menu_moveLightBar(m);
	mb_animated_menu_update(m);
    } else {
        if (m->top > 0) {
	    m->top--;
            mb_animated_menu_fillMenuContentUp(m);
	    mb_animated_menu_update(m);
        } else {
	    if (m->cur == 0)
	        return;
	    m->cur--;
            mb_animated_menu_moveLightBar(m);
	    mb_animated_menu_update(m);
	}
    }
}
static void mb_animated_menu_down(mb_animated_menu_t *m)
{

    if (m->cur < 5) {
	if (m->top+m->cur <= m->max) {
	    m->cur++;
            mb_animated_menu_moveLightBar(m);
	    mb_animated_menu_update(m);
	}
    } else  {
        if ((m->top+8) < m->max-1) {
	    m->top++;
            mb_animated_menu_fillMenuContentDown(m);
	    mb_animated_menu_update(m);
        } else {
   	    if (m->cur+m->top < m->max-1) {
	        m->cur++;
                mb_animated_menu_moveLightBar(m);
	        mb_animated_menu_update(m);
	    } else
	        return;
	}
    }
}

void mb_animated_menu_set_update_callback(mb_animated_menu_t *m, void (*f)(mb_animated_menu_t *m, int sel))
{
   m->update_callback = f;
}
void mb_animated_menu_set_callback(mb_animated_menu_t *m, void (*f)(mb_animated_menu_t *m, int sel))
{
   m->callback = f;
}
static void mb_animated_menu_update(mb_animated_menu_t *m)
{
   if (m->update_callback)
	   m->update_callback(m,m->top+m->cur);

}
static void mb_animated_menu_select(mb_animated_menu_t *m)
{
   if (m->callback)
	   m->callback(m,m->top+m->cur);
}

// Send the pending key in the animation progm complete callback
static void mb_animated_menu_keyHandler(event_t *ev, void *arg);
static void mb_animated_menu_send_pending_key(event_t *ev,void *arg)
{
    mb_animated_menu_t *m = (mb_animated_menu_t *) arg;
    X_kb_event_t *xkey;

    xkey = &m->pending_keys[m->pending_pos];
    m->pending_pos = (m->pending_pos + 1) & 0xf;
    mb_animated_menu_keyHandler((event_t *) xkey, m);
}
static void mb_animated_menu_keyHandler(event_t *ev, void *arg)
{
    mb_animated_menu_t *m = (mb_animated_menu_t *) arg;
    X_kb_event_t *xkey = (X_kb_event_t *)ev;
    if(xkey->event.type != EVT_KB_PRESS) {
        return;
    }
    if (m->ready<=0) {
	    m->pending_keys[m->pending_last++] = *xkey;
	    m->pending_last &= 0xf;
	    if(m->pending_last == m->pending_pos)
		m->pending_last = (m->pending_last - 1) & 0xf;
	    else
		subject_add_observer(mb_progm_get_complete(m->progm),
				     mb_animated_menu_send_pending_key,
				     m);
	    return;
    }
    switch(xkey->sym) {
    case 0xff51:		/* left */
	break;

    case 0xff52:		/* up */
	mb_animated_menu_up(m);
	break;

    case 0xff53:		/* right */
	break;

    case 0xff54:		/* down */
	mb_animated_menu_down(m);
	break;

    case 0xff0d:		/* enter */
	mb_animated_menu_select(m);
	break;
    default:
	return;
    }
}

/** \brief Create an instace of animated menu.
 *
 *   The objectnames is used to extract symbols from the SVG file.
 *         ${objectnames}0 - ${objectnames}8 is the text object.
 *         ${objectnames}_lightbar is the lightbar.
 *
 */
mb_animated_menu_t *mb_animated_menu_new(mbaf_t *app,mb_sprite_t *sp,char *objnames,char *menus[])
{
    mb_animated_menu_t *m;
    int i;
    char name[255];
    mb_obj_t *l;
    int ii;

    if (menus == NULL)
	    i=0;
    else
	    for(i=0;menus[i];i++);
    ii=9;

    m = (mb_animated_menu_t *) malloc(sizeof(mb_animated_menu_t));
    m->items = (int *) malloc(sizeof(int)*ii*2+sizeof(mb_obj_t *)*ii);
    m->app = app;
    m->sprite = sp;
    m->top = 0;
    m->cur = 0;
    m->ready = 1;
    m->max = i;
    m->menus_y = (int *) (m->items+ii);
    m->objects = (mb_obj_t **) (m->menus_y+ii);
    m->callback = NULL;
    m->update_callback = NULL;
    m->speed = 300000;
    for(i=0;i<9;i++) {
        m->items[i] = i;
	snprintf(name,sizeof(name),"%s%d", objnames, i+1);
	l = MB_SPRITE_GET_OBJ(sp,name);
	if (l == NULL) {
		fprintf(stderr,"Can not find symbol %s\n",name);
	}
	m->objects[i] = (mb_obj_t *) l;
	m->menus_y[i] = coord_y((coord_t*)l);
    }
    m->titles = menus;
    snprintf(name,sizeof(name), "%s_lightbar", objnames);
    m->lightbar = (mb_obj_t *) MB_SPRITE_GET_OBJ(sp,name);
    if (m->lightbar==NULL)
	    fprintf(stderr,"Can not find object %s\n",name);
    m->pending_pos = m->pending_last = 0;
    mb_animated_menu_fillMenuContent(m);
    subject_add_observer(MBAF_KB_SUBJECT(app), mb_animated_menu_keyHandler,m);
    return m;
}

void mb_animated_menu_set_titles(mb_animated_menu_t *m, char *menus[])
{
    int i;
    for(i=0;menus[i];i++);

    m->max = i;
    m->top = 0;
    m->cur = 0;
    m->titles = menus;
    mb_animated_menu_fillMenuContent(m);
    mb_animated_menu_moveLightBar(m);
}


void mb_animated_menu_set_speed(mb_animated_menu_t *m,int speed)
{
    m->speed = speed*1000;
}

int mb_animated_menu_get_speed(mb_animated_menu_t *m)
{
    return m->speed/1000;
}