/****************************************************************************
 * apps/examples/nxtext/nxtext_popup.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <semaphore.h>
#include <errno.h>
#include <debug.h>

#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxfonts.h>

#include "nxtext_internal.h"

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

#define NBM_CACHE    8
#define NGLYPH_CACHE 8

/****************************************************************************
 * Private Types
 ****************************************************************************/

/****************************************************************************
 * Private Function Prototypes
 ****************************************************************************/

static void nxpu_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
                        bool morem, FAR void *arg);
static void nxpu_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
                          FAR const struct nxgl_point_s *pos,
                          FAR const struct nxgl_rect_s *bounds,
                          FAR void *arg);
#ifdef CONFIG_NX_XYINPUT
static void nxpu_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
                         uint8_t buttons, FAR void *arg);
#endif

#ifdef CONFIG_NX_KBD
static void nxpu_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
                       FAR void *arg);
#endif

/****************************************************************************
 * Private Data
 ****************************************************************************/

/* Pop-up NX callbacks */

static const struct nx_callback_s g_pucb =
{
  nxpu_redraw,   /* redraw */
  nxpu_position  /* position */
#ifdef CONFIG_NX_XYINPUT
  , nxpu_mousein /* mousein */
#endif
#ifdef CONFIG_NX_KBD
  , nxpu_kbdin   /* kbdin */
#endif
  , NULL         /* event */
};

/* Pop-up state information */

static struct nxtext_state_s g_pustate;
#ifdef CONFIG_NX_KBD
static struct nxtext_bitmap_s  g_pubm[NBM_CACHE];
static struct nxtext_glyph_s g_puglyph[NGLYPH_CACHE];
#endif

/* Some random numbers */

static const uint8_t g_rand8[9] =
{
  0x18, 0x8d, 0x60, 0x42, 0xb7, 0xc2, 0x2d, 0xea, 0x6b
};

/****************************************************************************
 * Public Data
 ****************************************************************************/

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nxpu_randpos
 ****************************************************************************/

static fb_coord_t nxpu_randpos(fb_coord_t value)
{
  static uint8_t ndx = 0;
  uint8_t rand8 = g_rand8[ndx];

  if (++ndx >= 9)
    {
      ndx = 0;
    }

  return (fb_coord_t)(((uint32_t)value * (uint32_t)rand8) >> 8);
}

/****************************************************************************
 * Name: nxpu_setsize
 ****************************************************************************/

static inline int nxpu_setsize(NXWINDOW hwnd, FAR struct nxgl_size_s *size)
{
  int ret = nx_setsize(hwnd, size);
  if (ret < 0)
    {
      printf("nxpu_setsize: nx_setsize failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETSIZE;
    }
  return ret;
}

/****************************************************************************
 * Name: nxpu_setposition
 ****************************************************************************/

static inline int nxpu_setposition(NXWINDOW hwnd, FAR struct nxgl_point_s *pos)
{
  int ret = nx_setposition(hwnd, pos);
  if (ret < 0)
    {
      printf("nxpu_setposition: nx_setposition failed: %d\n", errno);
      g_exitcode = NXEXIT_NXSETPOSITION;
    }
  return ret;
}

/****************************************************************************
 * Name: nxpu_fillwindow
 ****************************************************************************/

static inline void nxpu_fillwindow(NXWINDOW hwnd,
                                   FAR const struct nxgl_rect_s *rect,
                                   FAR struct nxtext_state_s *st)
{
  int ret;
#ifdef CONFIG_NX_KBD
  int i;
#endif

  ret = nx_fill(hwnd, rect, st->wcolor);
  if (ret < 0)
    {
      printf("nxpu_fillwindow: nx_fill failed: %d\n", errno);
    }

  /* Fill each character on the display (Only the characters within rect
   * will actually be redrawn).
   */

#ifdef CONFIG_NX_KBD
  nxtext_home(st);
  for (i = 0; i < st->nchars; i++)
    {
      nxtext_fillchar(hwnd, rect, st, g_puhfont, &st->bm[i]);
    }
#endif
}

/****************************************************************************
 * Name: nxpu_redraw
 ****************************************************************************/

static void nxpu_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
                        bool more, FAR void *arg)
{
  FAR struct nxtext_state_s *st = (FAR struct nxtext_state_s *)arg;
  ginfo("hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
          hwnd, rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
          more ? "true" : "false");

  nxpu_fillwindow(hwnd, rect, st);
}

/****************************************************************************
 * Name: nxpu_position
 ****************************************************************************/

static void nxpu_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
                          FAR const struct nxgl_point_s *pos,
                          FAR const struct nxgl_rect_s *bounds,
                          FAR void *arg)
{
  FAR struct nxtext_state_s *st = (FAR struct nxtext_state_s *)arg;

  /* Report the position */

  ginfo("hwnd=%p size=(%d,%d) pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n",
        hwnd, size->w, size->h, pos->x, pos->y,
        bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y);

  /* Save the window position and size */

  st->wpos.x  = pos->x;
  st->wpos.y  = pos->y;

  st->wsize.w = size->w;
  st->wsize.h = size->h;
}

/****************************************************************************
 * Name: nxpu_mousein
 ****************************************************************************/

#ifdef CONFIG_NX_XYINPUT
static void nxpu_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
                         uint8_t buttons, FAR void *arg)
{
  printf("nxpu_mousein: hwnd=%p pos=(%d,%d) button=%02x\n",
         hwnd,  pos->x, pos->y, buttons);
}
#endif

/****************************************************************************
 * Name: nxpu_puts
 ****************************************************************************/

static inline void nxpu_puts(NXWINDOW hwnd, FAR struct nxtext_state_s *st,
                             uint8_t nch, FAR const uint8_t *ch)
{
  nxtext_home(st);
  while (nch--)
    {
      nxtext_putc(hwnd, st, g_puhfont, *ch++);
    }
}

/****************************************************************************
 * Name: nxpu_kbdin
 ****************************************************************************/

#ifdef CONFIG_NX_KBD
static void nxpu_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
                       FAR void *arg)
{
  FAR struct nxtext_state_s *st = (FAR struct nxtext_state_s *)arg;
  ginfo("hwnd=%p nch=%d\n", hwnd, nch);
  nxpu_puts(hwnd, st, nch, ch);
}
#endif

/****************************************************************************
 * Name: nxpu_initstate
 ****************************************************************************/

static inline void nxpu_initstate(void)
{
#ifdef CONFIG_NX_KBD
  FAR const struct nx_font_s *fontset;
#endif

  /* Initialize the color (used for redrawing the window) */

  memset(&g_pustate, 0, sizeof(struct nxtext_state_s));
  g_pustate.wcolor[0] = CONFIG_EXAMPLES_NXTEXT_PUCOLOR;
  g_pustate.fcolor[0] = CONFIG_EXAMPLES_NXTEXT_PUFONTCOLOR;

  /* Get information about the font set being used and save this in the
   * state structure
   */

#ifdef CONFIG_NX_KBD
  fontset             = nxf_getfontset(g_puhfont);
  g_pustate.fheight   = fontset->mxheight;
  g_pustate.fwidth    = fontset->mxwidth;
  g_pustate.spwidth   = fontset->spwidth;

  /* Set up the text caches */

  g_pustate.maxchars  = NBM_CACHE;
  g_pustate.maxglyphs = NGLYPH_CACHE;
  g_pustate.bm        = g_pubm;
  g_pustate.glyph     = g_puglyph;

  /* Set the first display position */

  nxtext_home(&g_pustate);
#endif
}

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: nxpu_open
 ****************************************************************************/

NXWINDOW nxpu_open(void)
{
  NXWINDOW hwnd;
  struct nxgl_size_s size;
  struct nxgl_point_s pt;
  int ret;

  /* Create a pop-up window */

  printf("nxpu_open: Create pop-up\n");
  nxpu_initstate();

  hwnd = nx_openwindow(g_hnx, 0, &g_pucb, (FAR void *)&g_pustate);
  ginfo("hwnd=%p\n", hwnd);

  if (!hwnd)
    {
      printf("nxpu_open: nx_openwindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXOPENWINDOW;
      goto errout_with_state;
    }

  /* Select the size of the pop-up window */

  size.w = g_xres / 4;
  size.h = g_yres / 4;

  /* Select a random position for pop-up window */

  pt.x =  nxpu_randpos(g_xres - size.w);
  pt.y =  nxpu_randpos(g_yres - size.h);

  /* Set the position for the pop-up window */

  printf("nxpu_open: Set pop-up position to (%d,%d)\n", pt.x, pt.y);
  ret = nxpu_setposition(hwnd, &pt);
  if (ret < 0)
    {
      goto errout_with_hwnd;
    }

  /* Set the size of the pop-up window */

  ginfo("Set pop-up size to (%d,%d)\n", size.w, size.h);
  ret = nxpu_setsize(hwnd, &size);
  if (ret < 0)
    {
      goto errout_with_hwnd;
    }

  return hwnd;

errout_with_hwnd:
  nx_closewindow(hwnd);

errout_with_state:
  return NULL;
}

/****************************************************************************
 * Name: nxpu_close
 ****************************************************************************/

int nxpu_close(NXWINDOW hwnd)
{
  int ret;

  ret = nx_closewindow(hwnd);
  if (ret < 0)
    {
      printf("nxpu_close: nx_closewindow failed: %d\n", errno);
      g_exitcode = NXEXIT_NXCLOSEWINDOW;
      return ret;
    }
  return OK;
}