//
//  BoardView.swift
//  Tetris
//
//  Created by Shadowfacts on 10/14/19.
//  Copyright © 2019 Shadowfacts. All rights reserved.
//

import SwiftUI
import TetrisKit

public struct BoardView: View {
    @Binding var board: GameBoard
    @Binding var currentPiece: GamePiece?
    @Binding var droppedPiece: GamePiece?
    
    public init(board: Binding<GameBoard>, currentPiece: Binding<GamePiece?>, droppedPiece: Binding<GamePiece?>) {
        self._board = board
        self._currentPiece = currentPiece
        self._droppedPiece = droppedPiece
    }
    
    public var body: some View {
        GeometryReader { (geometry) in
            ZStack(alignment: .topLeading) {
                TilesView(board: self.$board)
                
                if self.droppedPiece != nil {
                    GamePieceView(size: min(geometry.size.width / CGFloat(self.board.width), geometry.size.height / CGFloat(self.board.height)), piece: self.droppedPiece!, color: .gray, border: false)
                }
                if self.currentPiece != nil {
                    GamePieceView(size: min(geometry.size.width / CGFloat(self.board.width), geometry.size.height / CGFloat(self.board.height)), piece: self.currentPiece!)
                }
            }
        }
    }
}

struct BoardView_Previews: PreviewProvider {
    @ObservedObject static var controller: GameController = {
        var c = GameController()
        c.currentPiece = GamePiece(tetromino: .t)
        return c
    }()

    static var previews: some View {
        BoardView(board: $controller.board, currentPiece: $controller.currentPiece, droppedPiece: $controller.currentPieceAtDropPoint)
    }
}