using System;
using System.Collections;
using static ChineseChess.ChessCore;
using Vector2I = Vector.Vector2I;

namespace ChineseChess;
public class CCBoard : AbstractBoard
{
    public event EventHandler<int> OnStepsChanged;
    private int steps = 0;
    public int Steps {
        get => steps;
        protected set {
            if (steps != value) {
                steps = value;
                OnStepsChanged?.Invoke(this, steps);
            }
        }
    }
    public CCBoard() : base(9, 10) {
    }

    public override void AddRecord(IPiece From, IPiece To, Vector2I FromPos, Vector2I ToPos) {
        base.AddRecord(From, To, FromPos, ToPos);
        Steps += 1;
    }

    public override void UndoRecord() {
		base.UndoRecord();
        if (Steps > 0) Steps -= 1;
	}

    public (ArrayList, ArrayList) InitGame() {
        Steps = 0;
        // ArrayList blackPart = InitOnePartPieces(TurnsSideType.Black, new[] {
        //     new CCChariot(TurnsSideType.Black, "black chariot 0", 0, 0),
        //     ("车", 0, 0), ("马", 1, 0), ("象", 2, 0),
        //     ("士", 3, 0), ("将", 4, 0), ("士", 5, 0),
        //     ("象", 6, 0), ("马", 7, 0), ("车", 8, 0),
        //     ("炮", 1, 2), ("炮", 7, 2),
        //     ("卒", 0, 3), ("卒", 2, 3), ("卒", 4, 3), ("卒", 6, 3), ("卒", 8, 3)
        //     });

        // ArrayList redPart = InitOnePartPieces(TurnsSideType.Red, new[] {
        //     ("车", 0, -0), ("马", 1, -0), ("象", 2, -0),
        //     ("士", 3, -0), ("将", 4, -0), ("士", 5, -0),
        //     ("象", 6, -0), ("马", 7, -0), ("车", 8, -0),
        //     ("炮", 1, -2), ("炮", 7, -2),
        //     ("卒", 0, -3), ("卒", 2, -3), ("卒", 4, -3), ("卒", 6, -3), ("卒", 8, -3)
        //     });
        ArrayList blackPart = InitOnePartPieces(TurnsSideType.Black, new CCPiece[] {
            new CCChariot (this, TurnsSideType.Black, new Vector2I( 4, 0)), //  4,0
            new CCHorse   (this, TurnsSideType.Black, new Vector2I( 3, 0)), //  3,0
            new CCElephant(this, TurnsSideType.Black, new Vector2I( 2, 0)), //  2,0
            new CCAdvisor (this, TurnsSideType.Black, new Vector2I( 1, 0)), //  1,0
            new CCGeneral (this, TurnsSideType.Black, new Vector2I( 0, 0)), //  0,0
            new CCAdvisor (this, TurnsSideType.Black, new Vector2I(-1, 0)), // -1,0
            new CCElephant(this, TurnsSideType.Black, new Vector2I(-2, 0)), // -2,0
            new CCHorse   (this, TurnsSideType.Black, new Vector2I(-3, 0)), // -3,0
            new CCChariot (this, TurnsSideType.Black, new Vector2I(-4, 0)), // -4,0
            new CCCannon  (this, TurnsSideType.Black, new Vector2I( 3, 2)), //  3,2
            new CCCannon  (this, TurnsSideType.Black, new Vector2I(-3, 2)), // -3,2
            new CCPawn    (this, TurnsSideType.Black, new Vector2I(-4, 3)), // -4,3
            new CCPawn    (this, TurnsSideType.Black, new Vector2I(-2, 3)), // -2,3
            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 0, 3)), //  0,3
            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 2, 3)), // -4,3
            new CCPawn    (this, TurnsSideType.Black, new Vector2I( 4, 3))  //  4,3
        });

        ArrayList redPart = InitOnePartPieces(TurnsSideType.Red, new CCPiece[] {
            new CCChariot (this, TurnsSideType.Red, new Vector2I( 4, 0)), //  4,0
            new CCHorse   (this, TurnsSideType.Red, new Vector2I( 3, 0)), //  3,0
            new CCElephant(this, TurnsSideType.Red, new Vector2I( 2, 0)), //  2,0
            new CCAdvisor (this, TurnsSideType.Red, new Vector2I( 1, 0)), //  1,0
            new CCGeneral (this, TurnsSideType.Red, new Vector2I( 0, 0)), //  0,0
            new CCAdvisor (this, TurnsSideType.Red, new Vector2I(-1, 0)), // -1,0
            new CCElephant(this, TurnsSideType.Red, new Vector2I(-2, 0)), // -2,0
            new CCHorse   (this, TurnsSideType.Red, new Vector2I(-3, 0)), // -3,0
            new CCChariot (this, TurnsSideType.Red, new Vector2I(-4, 0)), // -4,0
            new CCCannon  (this, TurnsSideType.Red, new Vector2I( 3, 2)), //  3,2
            new CCCannon  (this, TurnsSideType.Red, new Vector2I(-3, 2)), // -3,2
            new CCPawn    (this, TurnsSideType.Red, new Vector2I(-4, 3)), // -4,3
            new CCPawn    (this, TurnsSideType.Red, new Vector2I(-2, 3)), // -2,3
            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 0, 3)), //  0,3
            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 2, 3)), //  2,3
            new CCPawn    (this, TurnsSideType.Red, new Vector2I( 4, 3))  //  4,3
        });

        return (blackPart, redPart);
    }

    private ArrayList InitOnePartPieces(TurnsSideType side, CCPiece[] pieces) {
        ArrayList list = new();
        foreach (var piece in pieces) {
            list.Add(piece);
            InsertPiece(piece, piece.Pos);
        }
        return list;
    }
}