using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[Serializable]
public class ToolEditVector
{
  [HideInInspector]
  public Vector3 cursorPos;
  [HideInInspector]
  public bool selecting, moving;
  [HideInInspector]
  public Vector3 fromCorner, toCorner;
  [HideInInspector]
  public List<int> selected = new List<int>();

  Vector3 moveFrom, oldCursorPos;

  public void Reset()
  {
    // for resetting the tool (when swapping around, initializing, etc)
    selecting = false;
    moving = false;
    selected.Clear();
  }

  public void Frame(Input input, Pixelgon pixelgon)
  {
    Vector3 rawCursorPos = cursorPos = input.dragCursor;

    if (!selecting)
    {
      if (!moving && input.mainCon.trigger.down)
      {
        // box select from corner anchor
        fromCorner = toCorner = cursorPos;
        selecting = true;
      }
    }
    else
    {
      // box select opposite corner drag
      toCorner = cursorPos;

      if (input.mainCon.two.down)
      {
        // cancel
        selecting = false;
      }
      else if (input.mainCon.trigger.up)
      {
        int selCount = 0;
        for (int i = 0; i < pixelgon.vectors.Count; i++)
        {
          if (pixelgon.vectors[i] != Vector3.zero)
          {
            if (
              StaticMethods.Inside(fromCorner.x, toCorner.x, pixelgon.vectors[i].x) &&
              StaticMethods.Inside(fromCorner.y, toCorner.y, pixelgon.vectors[i].y) &&
              StaticMethods.Inside(fromCorner.z, toCorner.z, pixelgon.vectors[i].z)
            )
            {
              if (!selected.Contains(i))
              {
                selected.Add(i);
              }
              selCount++;
            }
          }
        }

        if (selCount == 0)
        {
          selected.Clear();
        }

        selecting = false;
      }
    }


    // do some housekeeping  ^-^

    // pixelgon undo for move back
    // how to remove?
    // ToolEraser (handles joint, vector and quad removal)
    // put these and more into quire


    if (selected.Count > 0)
    {
      if (!moving)
      {
        if (!selecting && input.mainCon.one.down)
        {
          moveFrom = oldCursorPos = cursorPos;
          moving = true;
        }
      }
      else
      {
        Vector3 move = cursorPos - oldCursorPos;
        oldCursorPos = cursorPos;

        for (int i = 0; i < selected.Count; i++)
        {
          pixelgon.vectors[selected[i]] += move;
        }

        if (input.mainCon.two.down)
        {
          Vector3 delta = cursorPos - moveFrom;
          for (int i = 0; i < selected.Count; i++)
          {
            pixelgon.vectors[selected[i]] -= delta;
          }

          moving = false;
        }
        else if (input.mainCon.one.up)
        {
          moving = false;
        }
      }
    }





    // use just the selected[0] for snapping

    // int length = 0;
    // for (int i = 0; i < pixelgon.vectors.Count; i++)
    // {
    //   if (pixelgon.vectors[i] == Vector3.zero)
    //   {
    //     length = 0;
    //   }
    //   else
    //   {
    //     if (length > 0)
    //     {
    //       cursorPos = StaticMethods.EdgeSnap(
    //         pixelgon.vectors[i - 1],
    //         pixelgon.vectors[i],
    //         input.twistCursor
    //       );
    //       if (cursorPos != input.twistCursor)
    //       {
    //         break;
    //       }
    //     }

    //     length++;
    //   }
    // }
  }
}