// Copyright (C) 2019-2021 Aleo Systems Inc.
// This file is part of the Leo library.

// The Leo library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// The Leo library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.

use crate::{
    ast::Rule,
    types::GroupType,
    values::{GroupCoordinate, NumberValue},
};

use pest::Span;
use pest_ast::FromPest;
use std::fmt;

#[derive(Clone, Debug, FromPest, PartialEq, Eq)]
#[pest_ast(rule(Rule::value_group))]
pub struct GroupValue<'ast> {
    pub value: GroupRepresentation<'ast>,
    pub type_: GroupType,
    #[pest_ast(outer())]
    pub span: Span<'ast>,
}

impl<'ast> fmt::Display for GroupValue<'ast> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}", self.value)
    }
}

#[derive(Clone, Debug, FromPest, PartialEq, Eq)]
#[pest_ast(rule(Rule::group_single_or_tuple))]
pub enum GroupRepresentation<'ast> {
    Single(NumberValue<'ast>),
    Tuple(GroupTuple<'ast>),
}

impl<'ast> fmt::Display for GroupRepresentation<'ast> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self {
            GroupRepresentation::Single(number) => write!(f, "{}", number),
            GroupRepresentation::Tuple(tuple) => write!(f, "{}", tuple),
        }
    }
}

#[derive(Clone, Debug, FromPest, PartialEq, Eq)]
#[pest_ast(rule(Rule::group_tuple))]
pub struct GroupTuple<'ast> {
    pub x: GroupCoordinate<'ast>,
    pub y: GroupCoordinate<'ast>,
    #[pest_ast(outer())]
    pub span: Span<'ast>,
}

impl<'ast> fmt::Display for GroupTuple<'ast> {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({}, {})", self.x, self.y)
    }
}
