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use thiserror::Error;
use crate::{Board, ChessMove};
/// Error that can happen during the game.
///
/// derive from PartialEq for UnitTest
#[derive(Error, Clone, PartialEq, Eq, Debug)]
pub enum Error {
/// The move on a particular board doesn't respect the chess rules.
#[error(
"Invalid move ({}) on the given board ({}) according to the chess rule",
invalid_move,
board
)]
InvalidMove {
board: Board,
invalid_move: ChessMove,
},
/// The FEN (Forsyth-Edwards Notation) string is invalid.
#[error("Invalid FEN string: {}", fen)]
InvalidFen { fen: String },
/// An attempt was made to create a move from an invalid SAN string.
#[error("The string specified does not contain a valid SAN notation move")]
InvalidSanMove,
/// An attempt was made to create a square from an invalid string.
#[error("The string specified does not contain a valid algebraic notation square")]
InvalidSquare,
/// An attempt was made to convert a string not equal to "1"-"8" to a rank.
#[error("The string specified does not contain a valid rank")]
InvalidRank,
/// An attempt was made to convert a string not equal to "a"-"h" to a file.
#[error("The string specified does not contain a valid file")]
InvalidFile,
}