#include "utils.h"

Vector2 randomDirection2(int seed, int* nextSeed)
{
  Vector2 direction;
  direction.x = FT_RANDOM16(seed) % RANDOM_DIRECTION_UNITS;
  direction.y = FT_RANDOM16(seed) % RANDOM_DIRECTION_UNITS;
  direction.x -= RANDOM_DIRECTION_UNITS / 2.0;
  direction.y -= RANDOM_DIRECTION_UNITS / 2.0;

  if (nextSeed != NULL)
  {
    *nextSeed = seed;
  }

  return Vector2Normalize(direction);
}

Vector3 randomDirection3(int seed, int* nextSeed)
{
  Vector3 direction;
  direction.x = FT_RANDOM16(seed) % RANDOM_DIRECTION_UNITS;
  direction.y = FT_RANDOM16(seed) % RANDOM_DIRECTION_UNITS;
  direction.z = FT_RANDOM16(seed) % RANDOM_DIRECTION_UNITS;
  direction.x -= RANDOM_DIRECTION_UNITS / 2.0;
  direction.y -= RANDOM_DIRECTION_UNITS / 2.0;
  direction.z -= RANDOM_DIRECTION_UNITS / 2.0;

  if (nextSeed != NULL)
  {
    *nextSeed = seed;
  }

  return Vector3Normalize(direction);
}

void updateFloatWindow(FloatingWindow* window, const char* title)
{
#ifndef RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT
#define RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT 24
#endif

#ifndef RAYGUI_WINDOW_CLOSEBUTTON_SIZE
#define RAYGUI_WINDOW_CLOSEBUTTON_SIZE 18
#endif

  int closeTitleSizeDeltaHalf = (RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT -
                                 RAYGUI_WINDOW_CLOSEBUTTON_SIZE) / 2;

  // Window movement and resize collision check.
  if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON) && !window->moving
      && !window->resizing)
  {
    Vector2 mousePosition = GetMousePosition();

    Rectangle titleCollisionRect = (Rectangle){
      window->rect.x,
      window->rect.y,
      window->rect.width - (RAYGUI_WINDOW_CLOSEBUTTON_SIZE
                            + closeTitleSizeDeltaHalf),
      RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT
    };

    Rectangle resizeCollisionRect = (Rectangle){
      window->rect.x + window->rect.width - 20.0,
      window->rect.y + window->rect.height - 20.0,
      20.0,
      20.0
    };

    if (CheckCollisionPointRec(mousePosition, titleCollisionRect))
    {
      window->moving = true;
    }
    else if (!window->minimized
             && CheckCollisionPointRec(mousePosition, resizeCollisionRect))
    {
      window->resizing = true;
    }
  }

  // Window movement and resize update.
  if (window->moving)
  {
    Vector2 mouseDelta = GetMouseDelta();
    window->rect.x += mouseDelta.x;
    window->rect.y += mouseDelta.y;

    if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON))
    {
      window->moving = false;

      // Clamp window position on screen.
      window->rect.x = Clamp(window->rect.x, 0.0,
                             GetScreenWidth() - window->rect.width);
      window->rect.y = Clamp(window->rect.y, 0.0,
                             GetScreenHeight() -
                             RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT);
    }
  }
  else if (window->resizing)
  {
    Vector2 mousePosition = GetMousePosition();

    if (mousePosition.x > window->rect.x)
    {
      window->rect.width = mousePosition.x - window->rect.x;
    }
    if (mousePosition.y > window->rect.y)
    {
      window->rect.height = mousePosition.y - window->rect.y;
    }

    // TODO: Add window size clamp.
    
    if (IsMouseButtonReleased(MOUSE_BUTTON_LEFT))
    {
      window->resizing = true;
    }
  }

  if (window->minimized)
  {
    GuiStatusBar(
      (Rectangle){window->rect.x, window->rect.y, window->rect.width,
                  RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT},
      title);

    window->minimized = !GuiButton(
      (Rectangle){window->rect.x + window->rect.width -
                  RAYGUI_WINDOW_CLOSEBUTTON_SIZE -
                  closeTitleSizeDeltaHalf,
                  RAYGUI_WINDOW_CLOSEBUTTON_SIZE,
                  RAYGUI_WINDOW_CLOSEBUTTON_SIZE},
      "#120#");
  }
  else
  {
    window->minimized = GuiWindowBox(
      (Rectangle){window->rect.x, window->rect.y, window->rect.width,
                  RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT},
      title);

    if (window->callback != NULL)
    {
      Rectangle scissor;

      GuiScrollPanel(
        (Rectangle){window->rect.x,
                    window->rect.y + RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT,
                    window->rect.width,
                    window->rect.height - RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT},
        NULL,
        (Rectangle){window->rect.x, window->rect.y,
                    window->contentSize.x, window->contentSize.y},
        &window->scroll,
        &scissor);

      bool requireScissor = window->rect.width < window->contentSize.x
        || window->rect.height < window->contentSize.y;

      if (requireScissor)
      {
        BeginScissorMode(scissor.x, scissor.y, scissor.width, scissor.height);
      }

      window->callback((Vector2){window->rect.x, window->rect.y},
                       window->scroll);

      if (requireScissor)
      {
        EndScissorMode();
      }
    }

    GuiDrawIcon(71, window->rect.x + window->rect.width - 20,
                window->rect.y + window->rect.height - 20, 1, WHITE);
  }
}

// Why does the universe feel strange to exist in?