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use crate::nodes::InnerNode;
use crate::nodes::InspectVec;
use crate::source::Range;
use crate::Node;
/// Represents a `case` statement used for pattern matching (for regular `case` see `Case` node)
#[derive(Debug, Clone, PartialEq)]
pub struct CaseMatch {
    /// Expression given to `case`, `Int("1")` for `case 1; in 1; end`
    /// `None` for code like
    ///
    /// ```text
    /// case
    /// in pattern
    /// end
    /// ```
    pub expr: Box<Node>,
    /// A list of `InPattern` nodes (each has `pattern`, `guard` and `body`)
    pub in_bodies: Vec<Node>,
    /// Body of the `else` branch, `None` if there's no `else` branch
    pub else_body: Option<Box<Node>>,
    /// Location of the `case` keyword
    ///
    /// ```text
    /// case 1; in 2; end
    /// ~~~~
    /// ```
    pub keyword_l: Range,
    /// Location of the `else` keyword
    ///
    /// ```text
    /// case 1; in 2; else; end
    ///               ~~~~
    /// ```
    ///
    /// `None` if there's no `else` branch
    pub else_l: Option<Range>,
    /// Location of the `end` keyword
    ///
    /// ```text
    /// case 1; in 2; end
    ///               ~~~
    /// ```
    pub end_l: Range,
    /// Location of the full expression
    ///
    /// ```text
    /// case 1; in 2; end
    /// ~~~~~~~~~~~~~~~~~
    /// ```
    pub expression_l: Range,
}


impl InnerNode for CaseMatch {
    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.expr);
        result.push_nodes(&self.in_bodies);
        result.push_maybe_node_or_nil(&self.else_body);
        result.strings()
    }

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

    fn print_with_locs(&self) {
        println!("{}", self.inspect(0));
        self.expression_l.print("expression");
        self.end_l.print("end");
        if let Some(range) = &self.else_l {
            range.print("else");
        }
        self.keyword_l.print("keyword");
        if let Some(node) = &self.else_body {
            node.inner().print_with_locs();
        }
        for node in self.in_bodies.iter() {
            node.inner().print_with_locs();
        }
        self.expr.inner().print_with_locs();
    }
}