// Copyright (C) 2019-2026 Provable 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::{Expression, Node, NodeID};
use leo_span::Span;

use serde::{Deserialize, Serialize};
use std::fmt;

/// An array access expression, e.g., `foo[index]`.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct ArrayAccess {
    /// An expression evaluating to some array type, e.g., `[false, true]`.
    pub array: Expression,
    /// The index to access in the array expression. E.g., `0` for `[false, true]` would yield `false`.
    pub index: Expression,
    /// The span for the entire expression `foo[index]`.
    pub span: Span,
    /// The ID of the node.
    pub id: NodeID,
}

impl fmt::Display for ArrayAccess {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "{}[{}]", self.array, self.index)
    }
}

impl From<ArrayAccess> for Expression {
    fn from(value: ArrayAccess) -> Self {
        Expression::ArrayAccess(Box::new(value))
    }
}

crate::simple_node_impl!(ArrayAccess);
