#include "base.h"

const I32 VECTORINPUT_TITLE_OFFSET = 15;

void gui_vectorinput_draw_fn( void* ptr ) {
  GUI_VECTORINPUT* input = (GUI_VECTORINPUT*)ptr;

  I32 x = gui_relx( input );
  I32 y = gui_rely( input );

  gui_draw_str( x, y, ALIGN_L, FNT_JPN12, ui_clr.txt, input->name );

  GUI_VIEW* inputview = input->inputview;
  inputview->draw_fn( inputview );
}

void gui_vectorinput_input_fn( void* ptr ) {
  GUI_VECTORINPUT* input = (GUI_VECTORINPUT*)ptr;

  GUI_VIEW* inputview = input->inputview;
  inputview->input_fn( inputview );
}

void gui_vectorinput_child_cb( void* ptr ) {
  GUI_FLOATINPUT* child = (GUI_FLOATINPUT*)ptr;
                                           // slider -> child view -> vectorinput
  GUI_VECTORINPUT* parent = (GUI_VECTORINPUT*)child->parent->parent;
  for( auto& it : parent->lastchange )
    it = 0.f;

  for( U32 i = 0; i < parent->inputs.size; ++i ) {
    if( parent->inputs.data[i] == child ) {
      parent->lastchange.data[i] = child->lastchange;
      break;
    }
  }

  if( parent->cb )
    parent->cb( parent );
}

void __gui_internal_vectorinput_init(
  GUI_VECTORINPUT *input,
  I32 x, I32 y, I32 w,
  const char *title,
  F32 *pval,
  U32 valc,
  F32 min,
  F32 max,
  F32 step,
  const char *letters,
  const char *printfmt
) {
  input->x = x;
  input->y = y;
  input->w = w;
  input->h = 20;
  strcpy( input->name, title );
  input->xbound = input->w;
  input->ybound = input->h + VECTORINPUT_TITLE_OFFSET;
  input->draw_fn = gui_vectorinput_draw_fn;
  input->input_fn = gui_vectorinput_input_fn;

  GUI_VIEW* parent = gui_get_view();
  parent->children.push( input );
  input->parent = parent;
  input->lastchange.resize( valc );

  gui_set_view( input );

  input->cb = 0;
  input->pval = pval;
  input->letters = letters;
  input->inputview = gui_view( 0, VECTORINPUT_TITLE_OFFSET, w, input->h );
  input->inputview->parent = input;
  I32 wdiv = (input->w - 5 * (valc - 1)) / valc;
  for( I32 i = 0; i < valc; ++i ) {
    char letter[2] = { input->letters[i], 0 };
    GUI_FLOATINPUT* slider = gui_floatinput(
      (wdiv + 5) * i,
      0,
      wdiv,
      letter,
      &pval[i],
      min,
      max,
      step,
      printfmt
    );

    input->inputs.push( slider );
    slider->cb = gui_vectorinput_child_cb;
  }

  gui_set_view( parent );
}

GUI_VECTORINPUT* gui_vectorinput(
  I32 x,
  I32 y,
  I32 w,
  const char* title,
  F32* pval,
  U32 valc,
  F32 min,
  F32 max,
  F32 step,
  const char* letters,
  const char* printfmt,
  U8 showval
) {
  if( !gui_check_target() ) return 0;
  if( valc > 25 ) {
    dlog( "gui_vectorinput() : have you lost your mind?" );
    return 0;
  }

  GUI_VECTORINPUT* input = new GUI_VECTORINPUT;
  __gui_internal_vectorinput_init(
    input,
    x, y, w,
    title,
    pval,
    valc,
    min,
    max,
    step,
    letters,
    printfmt
  );

  if( !showval ) {
    for( auto& it : input->inputview->children ) {
      GUI_FLOATINPUT* f = (GUI_FLOATINPUT*)it;
      f->drawval = 0;
    }
  }

  return input;
}