use crate::ast::{ASTNode, BinaryOperator, Span};
use crate::parser::common::ParserUtils;
use crate::parser::{NyashParser, ParseError};
use crate::tokenizer::TokenType;

impl NyashParser {
    pub(crate) fn expr_parse_or(&mut self) -> Result<ASTNode, ParseError> {
        let mut expr = self.expr_parse_and()?;
        while self.match_token(&TokenType::OR) {
            let operator = BinaryOperator::Or;
            self.advance();
            let right = self.expr_parse_and()?;
            if std::env::var("NYASH_GRAMMAR_DIFF").ok().as_deref() == Some("1") {
                let ok = crate::grammar::engine::get().syntax_is_allowed_binop("or");
                if !ok {
                    eprintln!("[GRAMMAR-DIFF][Parser] binop 'or' not allowed by syntax rules");
                }
            }
            expr = ASTNode::BinaryOp {
                operator,
                left: Box::new(expr),
                right: Box::new(right),
                span: Span::unknown(),
            };
        }
        Ok(expr)
    }

    pub(crate) fn expr_parse_and(&mut self) -> Result<ASTNode, ParseError> {
        let mut expr = self.expr_parse_bit_or()?;
        while self.match_token(&TokenType::AND) {
            let operator = BinaryOperator::And;
            self.advance();
            let right = self.expr_parse_equality()?;
            if std::env::var("NYASH_GRAMMAR_DIFF").ok().as_deref() == Some("1") {
                let ok = crate::grammar::engine::get().syntax_is_allowed_binop("and");
                if !ok {
                    eprintln!("[GRAMMAR-DIFF][Parser] binop 'and' not allowed by syntax rules");
                }
            }
            expr = ASTNode::BinaryOp {
                operator,
                left: Box::new(expr),
                right: Box::new(right),
                span: Span::unknown(),
            };
        }
        Ok(expr)
    }
}