#include "editor.h"
#include "../util/string.h"

const U32 TOOLVIEW_TITLE_OFFSET = 15;
const I32 TOOLVIEW_INNER_X = 10;
const I32 TOOLVIEW_INNER_PAD = 20;
const I32 TOOLVIEW_ROW_HEIGHT = 20;
const I32 TOOLVIEW_ROW_GAP = 4;
const I32 TOOLVIEW_WALL_SHAPE_LIST_HEIGHT = 54;

GUI_EDITOR_TOOLVIEW* gui_editor_toolview_from_item_child( GUI_BASE* child ) {
  if( !child || !child->parent || !child->parent->parent )
    return 0;

  return (GUI_EDITOR_TOOLVIEW*)child->parent->parent;
}

void gui_editor_toolview_sanitize_float_input( void* ptr ) {
  GUI_FLOATINPUT* input = (GUI_FLOATINPUT*)ptr;
  F32* pval = input->pval;

  if( pval == &editor->tool.polysides ) {
    if( !isfinite( *pval ) ) *pval = EDITOR_DEFAULT_POLY_SIDES;
    F32 rounded = floorf( *pval + 0.5f );
    if( rounded < EDITOR_POLY_SIDES_MIN ) rounded = EDITOR_POLY_SIDES_MIN;
    if( rounded > EDITOR_POLY_SIDES_MAX ) rounded = EDITOR_POLY_SIDES_MAX;
    *pval = rounded;
    return;
  }

  if( pval == &editor->tool.wallheight ) {
    if( !isfinite( *pval ) ) *pval = EDITOR_DEFAULT_WALL_HEIGHT;
    if( *pval < 1.f ) *pval = 1.f;
    return;
  }

  if( pval == &editor->tool.placementheight ) {
    if( !isfinite( *pval ) ) *pval = EDITOR_DEFAULT_PLACEMENT_HEIGHT;
  }
}

I32 gui_editor_toolview_create_float_input(
  GUI_EDITOR_TOOLVIEW* view,
  I32 y,
  const char* title,
  F32* pval,
  F32 min,
  F32 max,
  F32 step,
  const char* fmt
) {
  GUI_FLOATINPUT* input = gui_floatinput(
    TOOLVIEW_INNER_X,
    y,
    view->w - TOOLVIEW_INNER_PAD,
    title,
    pval,
    min,
    max,
    step,
    fmt
  );

  input->cb = gui_editor_toolview_sanitize_float_input;
  if( input->cb ) input->cb( input );
  return y + TOOLVIEW_ROW_HEIGHT + TOOLVIEW_ROW_GAP;
}

void gui_editor_toolview_queue_refresh( GUI_EDITOR_TOOLVIEW* view ) {
  if( !view )
    return;

  gui_push_callback( view, pfn( void* ptr ) {
    gui_editor_toolview_update( (GUI_EDITOR_TOOLVIEW*)ptr );
  } );
}

void gui_editor_toolview_wallshape_dropdown_toggle_cb( void* ptr ) {
  GUI_BUTTON* btn = (GUI_BUTTON*)ptr;
  GUI_EDITOR_TOOLVIEW* view = gui_editor_toolview_from_item_child( btn );
  if( !view )
    return;

  view->wallshape_dropdown_open = !view->wallshape_dropdown_open;
  gui_editor_toolview_queue_refresh( view );
}

void gui_editor_toolview_wallshape_select_cb( void* ptr ) {
  GUI_LIST* list = (GUI_LIST*)ptr;
  GUI_EDITOR_TOOLVIEW* view = gui_editor_toolview_from_item_child( list );
  if( !view )
    return;

  view->wallshape_dropdown_open = 0;
  gui_editor_toolview_queue_refresh( view );
}

I32 gui_editor_toolview_create_wallshape_dropdown( GUI_EDITOR_TOOLVIEW* view, I32 y ) {
  static LIST<GUI_LIST_ENTRY> shape_entries{};
  if( !shape_entries.size ) {
    GUI_LIST_ENTRY line{};
    line.val = EDITOR_WALLSHAPE_LINE;
    strcpy( line.title, "line" );
    shape_entries.push( line );

    GUI_LIST_ENTRY polygon{};
    polygon.val = EDITOR_WALLSHAPE_POLYGON;
    strcpy( polygon.title, "polygon" );
    shape_entries.push( polygon );
  }

  const char* shape_name = editor->tool.wallshape == EDITOR_WALLSHAPE_POLYGON ? "polygon" : "line";
  char dropdown_title[64];
  sprintf( dropdown_title, "shape: %s v", shape_name );

  gui_button(
    TOOLVIEW_INNER_X,
    y,
    view->w - TOOLVIEW_INNER_PAD,
    TOOLVIEW_ROW_HEIGHT,
    dropdown_title,
    gui_editor_toolview_wallshape_dropdown_toggle_cb
  );

  y += TOOLVIEW_ROW_HEIGHT + TOOLVIEW_ROW_GAP;
  if( !view->wallshape_dropdown_open )
    return y;

  GUI_LIST* shape = gui_list(
    TOOLVIEW_INNER_X,
    y,
    view->w - TOOLVIEW_INNER_PAD,
    TOOLVIEW_WALL_SHAPE_LIST_HEIGHT,
    "shape",
    &shape_entries,
    &editor->tool.wallshape
  );

  shape->cb = gui_editor_toolview_wallshape_select_cb;
  y += TOOLVIEW_WALL_SHAPE_LIST_HEIGHT + TOOLVIEW_ROW_GAP;
  return y;
}

I32 gui_editor_toolview_create_poly_sides_input( GUI_EDITOR_TOOLVIEW* view, I32 y ) {
  return gui_editor_toolview_create_float_input(
    view,
    y,
    "sides",
    &editor->tool.polysides,
    (F32)EDITOR_POLY_SIDES_MIN,
    (F32)EDITOR_POLY_SIDES_MAX,
    1.f,
    "%.0f"
  );
}

I32 gui_editor_toolview_create_wall_height_input( GUI_EDITOR_TOOLVIEW* view, I32 y ) {
  return gui_editor_toolview_create_float_input(
    view,
    y,
    "wall height",
    &editor->tool.wallheight,
    1.f,
    1024.f,
    1.f,
    "%.0f"
  );
}

I32 gui_editor_toolview_create_placement_height_input( GUI_EDITOR_TOOLVIEW* view, I32 y ) {
  return gui_editor_toolview_create_float_input(
    view,
    y,
    "placement z",
    &editor->tool.placementheight,
    -4096.f,
    4096.f,
    1.f,
    "%.0f"
  );
}

void gui_editor_toolview_get_title( GUI_EDITOR_TOOLVIEW* view, char* out ) {
  switch( editor->tool.type ) {
    case EDITOR_TOOL_ENT: memcpy( out, "tool: entity", 12 ); break;
    case EDITOR_TOOL_WALL: memcpy( out, "tool: wall", 10 ); break;
    case EDITOR_TOOL_POLY: memcpy( out, "tool: polygon", 14 ); break;
    case EDITOR_TOOL_SELECT: memcpy( out, "tool: select", 12 ); break;
    case EDITOR_TOOL_SPRITE: memcpy( out, "tool: sprite", 12 ); break;
    default: memcpy( out, "tool: none", 10 ); break;
  }
}

void gui_editor_toolview_update( GUI_EDITOR_TOOLVIEW* view ) {
  if( !view )
    return;

  GUI_VIEW* oldview = gui_get_view();
  gui_set_view( view->itemview );
  gui_empty_children( view->itemview );
  view->itemview->initheld = 1;

  I32 y = 10;
  if( editor->tool.type == EDITOR_TOOL_WALL ) {
    y = gui_editor_toolview_create_wallshape_dropdown( view, y );
    if( view->wallshape_dropdown_open ) {
      gui_set_view( oldview );
      return;
    }

    if( editor->tool.wallshape == EDITOR_WALLSHAPE_POLYGON ) {
      y = gui_editor_toolview_create_poly_sides_input( view, y );
    }

    y = gui_editor_toolview_create_wall_height_input( view, y );
    y = gui_editor_toolview_create_placement_height_input( view, y );
  }
  else if( editor->tool.type == EDITOR_TOOL_POLY ) {
    y = gui_editor_toolview_create_poly_sides_input( view, y );
    y = gui_editor_toolview_create_placement_height_input( view, y );
  }

  gui_set_view( oldview );
}

void gui_editor_toolview_draw_fn( void* ptr ) {
  if( !editor->map ) return;

  GUI_EDITOR_TOOLVIEW* view = (GUI_EDITOR_TOOLVIEW*)ptr;

  I32 x = gui_relx( view );
  I32 y = gui_rely( view );
  I32 w = view->w;
  I32 h = view->h;

  STR<64> title{};
  gui_editor_toolview_get_title( view, title );
  gui_draw_str( x, y, ALIGN_L, FNT_JPN12, ui_clr.txt, title );
  y += TOOLVIEW_TITLE_OFFSET;

  CLR col = gui_is_fg_window( view )? ui_clr.border : ui_clr.border_inactive;
  gui_draw_frect( x, y, w, h, col );
  gui_draw_frect( x+1, y+1, w-2, h-2, ui_clr.bg_sec );

  view->itemview->draw_fn( view->itemview );
}

GUI_EDITOR_TOOLVIEW* gui_editor_toolview( I32 x, I32 y, I32 w, I32 h ) {
  if( !gui_check_target() ) return 0;

  GUI_EDITOR_TOOLVIEW* view = new GUI_EDITOR_TOOLVIEW;
  view->x = x;
  view->y = y;
  view->w = w;
  view->h = h;
  view->xbound = view->w;
  view->ybound = view->h + TOOLVIEW_TITLE_OFFSET;
  strcpy( view->name, "EDITOR_PROP_VIEW" );
  view->draw_fn = gui_editor_toolview_draw_fn;
  view->input_fn = gui_base_input_fn;
  view->wallshape_dropdown_open = 0;

  GUI_VIEW* parent = gui_get_view();
  parent->children.push( view );
  view->parent = parent;

  gui_set_view( view );
  view->itemview = gui_view( 0, TOOLVIEW_TITLE_OFFSET, w, h );

  gui_set_view( parent );

  return view;
}