const std = @import("std");
const ast = @import("ast.zig");

fn parenthesize(name: []const u8, exprs: []*ast.Expr) void {
    std.debug.warn("({}", name);

    for (exprs) |expr| {
        std.debug.warn(" ");
        printAst(expr);
    }

    std.debug.warn(")");
}

pub fn printAst(ast_expr: *ast.Expr) void {
    switch (ast_expr.*) {
        .Binary => |expr| parenthesize(expr.operator.lexeme, &[]*ast.Expr{ expr.left, expr.right }),
        .Grouping => |expr| parenthesize("group", &[]*ast.Expr{expr.expression}),
        .Unary => |expr| parenthesize(expr.operator.lexeme, &[]*ast.Expr{expr.right}),
        .Number => |ast_num| {
            switch (ast_num) {
                .Integer32 => |num| std.debug.warn("{}", num),
                .Integer64 => |num| std.debug.warn("{}", num),
                .Unsigned32 => |num| std.debug.warn("{}", num),
                .Unsigned64 => |num| std.debug.warn("{}", num),
                .Float32 => |num| std.debug.warn("{}", num),
                .Float64 => |num| std.debug.warn("{}", num),
            }
        },
        else => unreachable,
    }
}