endbasic-core 0.13.0

// EndBASIC
// Copyright 2026 Julio Merino
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

//! A callable exposed to integration tests.

use super::format_arg;
use endbasic_core::*;
use std::borrow::Cow;
use std::cell::RefCell;
use std::rc::Rc;

/// A command that prints its arguments to a virtual console.
pub(super) struct OutCommand {
    metadata: Rc<CallableMetadata>,
    output: Rc<RefCell<String>>,
}

impl OutCommand {
    pub(super) fn new(output: Rc<RefCell<String>>) -> Rc<Self> {
        Rc::from(Self {
            metadata: CallableMetadataBuilder::new("OUT")
                .with_syntax(&[(
                    &[],
                    Some(&RepeatedSyntax {
                        name: Cow::Borrowed("arg"),
                        type_syn: RepeatedTypeSyntax::AnyValue,
                        sep: ArgSepSyntax::OneOf(&[ArgSep::As, ArgSep::Long, ArgSep::Short]),
                        require_one: false,
                        allow_missing: true,
                    }),
                )])
                .test_build(),
            output,
        })
    }
}

impl Callable for OutCommand {
    fn metadata(&self) -> Rc<CallableMetadata> {
        self.metadata.clone()
    }

    fn exec(&self, scope: Scope<'_>) -> CallResult<()> {
        let mut line = String::new();
        let mut argi = 0;
        let mut reg = 0;
        loop {
            let sep = match scope.get_type(reg) {
                VarArgTag::Immediate(sep, etype) => {
                    reg += 1;
                    let formatted = format_arg(&scope, reg, etype);
                    line.push_str(&format!("{}={}{}", argi, formatted, etype.annotation()));
                    sep
                }
                VarArgTag::Missing(sep) => {
                    line.push_str(&format!("{}=()", argi));
                    sep
                }
                VarArgTag::Pointer(sep) => {
                    reg += 1;
                    let typed_ptr = scope.get_ref(reg);
                    line.push_str(&format!("{}={}", argi, typed_ptr));
                    sep
                }
            };
            argi += 1;
            reg += 1;

            if sep == ArgSep::End {
                break;
            }
            line.push(' ');
            line.push_str(&sep.to_string());
            line.push(' ');
        }
        let mut output = self.output.borrow_mut();
        output.push_str(&line);
        output.push('\n');
        Ok(())
    }
}