using System;

namespace PKHeX.Core;

/// <summary>
/// Represents a Box Editor that loads the contents for easy manipulation.
/// </summary>
public sealed class BoxEdit
{
    private readonly SaveFile SAV;
    private readonly PKM[] CurrentContents;

    public BoxEdit(SaveFile sav)
    {
        SAV = sav;
        CurrentContents = new PKM[sav.BoxSlotCount];
    }

    public void Reload() => LoadBox(CurrentBox);

    public void LoadBox(int box)
    {
        if ((uint)box >= SAV.BoxCount)
            throw new ArgumentOutOfRangeException(nameof(box));

        SAV.AddBoxData(CurrentContents, box, 0);
        CurrentBox = box;
    }

    public PKM this[int index]
    {
        get => CurrentContents[index];
        set
        {
            CurrentContents[index] = value;
            SAV.SetBoxSlotAtIndex(value, index);
        }
    }

    public int CurrentBox { get; private set; }
    public int BoxWallpaper { get => SAV.GetBoxWallpaper(CurrentBox); set => SAV.SetBoxWallpaper(CurrentBox, value); }
    public string BoxName { get => SAV.GetBoxName(CurrentBox); set => SAV.SetBoxName(CurrentBox, value); }

    public int MoveLeft(bool max = false)
    {
        int newBox = max ? 0 : (CurrentBox + SAV.BoxCount - 1) % SAV.BoxCount;
        LoadBox(newBox);
        return newBox;
    }

    public int MoveRight(bool max = false)
    {
        int newBox = max ? SAV.BoxCount - 1 : (CurrentBox + 1) % SAV.BoxCount;
        LoadBox(newBox);
        return newBox;
    }
}