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use crate::nodes::InnerNode;
use crate::nodes::InspectVec;
use crate::source::Range;
use crate::Node;
/// Represents constant access (i.e. `Foo::Bar`)
#[derive(Debug, Clone, PartialEq)]
pub struct Const {
    /// Scope where the constant is taken from:
    ///     1. `Some(Const("A"))` for `A::B`
    ///     2. `None` if it's taken from the current scope (i.e. `A`)
    ///     3. `Some(Cbase)` if it's taken from the global scope (i.e. `::A`)
    pub scope: Option<Box<Node>>,
    /// Name of the constant, `String("Foo")` for `Foo`
    pub name: String,
    /// Location of the `::` operator. `None` if constant is taken from the current scope.
    ///
    /// ```text
    /// A::B
    ///  ~~
    /// ```
    pub double_colon_l: Option<Range>,
    /// Location of the constant name
    ///
    /// ```text
    /// Foo::Bar
    ///      ~~~
    /// ```
    pub name_l: Range,
    /// Location of the full expression
    ///
    /// ```text
    /// Foo::Bar
    /// ~~~~~~~~
    /// ```
    pub expression_l: Range,
}


impl InnerNode for Const {
    fn expression(&self) -> &Range {
        &self.expression_l
    }

    fn inspected_children(&self, indent: usize) -> Vec<String> {
        let mut result = InspectVec::new(indent);
        result.push_maybe_node_or_nil(&self.scope);
        result.push_str(&self.name);
        result.strings()
    }

    fn str_type(&self) -> &'static str {
        "const"
    }

    fn print_with_locs(&self) {
        println!("{}", self.inspect(0));
        self.expression_l.print("expression");
        self.name_l.print("name");
        if let Some(range) = &self.double_colon_l {
            range.print("double_colon");
        }
        if let Some(node) = &self.scope {
            node.inner().print_with_locs();
        }
    }
}