use crate::nodes::InnerNode;
use crate::nodes::InspectVec;
use crate::source::Range;
use crate::Node;
/// Represents an `if`/`unless` modifier (i.e. `stmt if cond`)
#[derive(Debug, Clone, PartialEq)]
pub struct IfMod {
    /// Condition of the modifier
    pub cond: Box<Node>,
    /// True-branch of the modifier.
    ///
    /// Always set for `if` modifier.
    /// Always `None` for `unless` modifier.
    pub if_true: Option<Box<Node>>,
    /// False-branch of the modifier.
    ///
    /// Always set for `unless` modifier.
    /// Always `None` for `if` modifier.
    pub if_false: Option<Box<Node>>,
    /// Location of the `if`/`unless` keyword
    ///
    /// ```text
    /// stmt if cond
    ///      ~~
    ///
    /// stmt unless cond
    ///      ~~~~~~
    /// ```
    pub keyword_l: Range,
    /// Location of the full expression
    ///
    /// ```text
    /// stmt if cond
    /// ~~~~~~~~~~~~
    ///
    /// stmt unless cond
    /// ~~~~~~~~~~~~~~~~
    /// ```
    pub expression_l: Range,
}


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

    fn inspected_children(&self, indent: usize) -> Vec<String> {
        let mut result = InspectVec::new(indent);
        result.push_node(&self.cond);
        result.push_maybe_node_or_nil(&self.if_true);
        result.push_maybe_node_or_nil(&self.if_false);
        result.strings()
    }

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

    fn print_with_locs(&self) {
        println!("{}", self.inspect(0));
        self.expression_l.print("expression");
        self.keyword_l.print("keyword");
        if let Some(node) = &self.if_false {
            node.inner().print_with_locs();
        }
        if let Some(node) = &self.if_true {
            node.inner().print_with_locs();
        }
        self.cond.inner().print_with_locs();
    }
}