/*
 *  Created on: Nov 28, 2017
 *      Author: naopross
 */

#include "Scope.hpp"

using namespace samb;

/* Scope::iterator */

Scope::iterator::iterator(Statement::pointer statement): m_current(statement) {

}

Scope::iterator::~iterator() {

}

Scope::iterator& Scope::iterator::operator++() {
    if (m_current->next() == nullptr) {
        // TODO: remove throw
        throw std::logic_error("Statement::iterator::operator++() m_current->next() is nullptr");
    }

    m_current = m_current->next();

    return *this;
}

Scope::iterator& Scope::iterator::operator++(int) {
    static Scope::iterator old(*this);

    old = *this;
    operator++();
    return old;
}

Statement& Scope::iterator::operator*() const {
    if (m_current == nullptr) {
        throw std::logic_error("Statement::iterator::operator*() m_current is nullptr");
    }

    return *m_current;
}

Statement::pointer Scope::iterator::operator->() const {
    return m_current;
}


/* Scope */

Scope::Scope(std::string label): Statement(Statement::Type::SCOPE, label, nullptr), m_head(nullptr), m_tail(nullptr) {

}

Scope::Scope(std::string label, Statement::pointer first): Statement(Statement::Type::SCOPE, label, first), m_head(first), m_tail(first) {

}

Scope::~Scope() {

}

Scope::iterator Scope::insert_after(Scope::iterator it, Statement::pointer statement) {
    if (statement == nullptr) {
        throw std::invalid_argument("Statement::insert_after() cannot insert nullptr");
    }

    statement->next(it->next());
    it->next(statement);

    m_size++;

    return it;
}

Scope::iterator Scope::erase_after(Scope::iterator it) {
    if (it->next() == nullptr) {
        return end();
    }

    it->next(it->next()->next());

    return it;
}