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use std::{str::Chars, fmt::Display};
use crate::{square::Square, bitboard::BitboardFns, board::piece::Piece};
#[derive(Debug, Clone, PartialEq, Eq, Copy)]
pub enum MoveKind {
Quiet,
Capture,
Castle,
EnPassant,
DoublePush,
Promotion(Piece),
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Move {
pub source: Square,
pub target: Square,
pub kind: MoveKind,
}
impl Move {
pub fn print(&self) {
let bb = self.source.to_bitboard() | self.target.to_bitboard();
bb.print(format!("{:?}", self).as_str());
}
/// Tactical move is a move that changes material score
pub fn is_tactical(&self) -> bool {
matches!(self.kind, MoveKind::Capture | MoveKind::EnPassant | MoveKind::Promotion(_))
}
pub fn from_notation(mut notation: Chars) -> Self {
let source = Square::from_notation(&mut notation).unwrap();
let target = Square::from_notation(&mut notation).unwrap();
if let Some(promotion) = notation.next() {
let piece = match promotion {
'r' => Piece::Rook,
'q' => Piece::Queen,
'b' => Piece::Bishop,
'n' => Piece::Knight,
_ => panic!("Illegal promotion piece: {:?}", promotion)
};
return Move { source, target, kind: MoveKind::Promotion(piece) }
}
Move { source, target, kind: MoveKind::Quiet }
}
}
impl Display for Move {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let promotion_postfix = match self.kind {
MoveKind::Promotion(piece) => {
match piece.without_color() {
Piece::Rook => "r",
Piece::Queen => "q",
Piece::Bishop => "b",
Piece::Knight => "n",
_ => panic!("Illegal promotion piece: {:?}", piece)
}
}
_ => ""
};
write!(f, "{}{}{}", self.source, self.target, promotion_postfix)
}
}
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