#include "ast_basic.h"
#include <QDebug>

using namespace ast_basic;
using namespace lib_token;
using namespace lib_syntax;

ExpressionElement::ExpressionElement(std::shared_ptr<const ExpressionRule> bind) : _expr_rule(bind) {}

std::shared_ptr<const ExpressionRule> ExpressionElement::definedRule() const {
    return _expr_rule;
}

QString ExpressionElement::filePath() const {
    if(!tokens_bind.size())
        throw new SyntaxException(u8"InternalError[0x0002]一个空的非法无效节点");
    
    return tokens_bind.first()->file();
}

void ExpressionElement::tokensReset(const QList<std::shared_ptr<const IToken>>& list) {
    this->tokens_bind = list;
}

void ExpressionElement::addToken(std::shared_ptr<const IToken> token_inst) {
    this->tokens_bind.append(token_inst);
}

QList<std::shared_ptr<const Expression>> ExpressionElement::children() const {
    return this->children_store;
}

void ExpressionElement::addChild(std::shared_ptr<const Expression> inst) {
    this->children_store.append(inst);
}

QList<std::shared_ptr<const IToken>> ExpressionElement::tokens() const {
   return this->tokens_bind;
}

ExpressionContext::ExpressionContext() {}

void ExpressionContext::setCurrentFile(const QString& path) { this->current_file_path = path; }

QString ExpressionContext::currentFile() const { return this->current_file_path; }

std::shared_ptr<Expression> ExpressionContext::currentInst() const
{
    if(expression_stack.size())
        return expression_stack.last();

    return nullptr;
}

void ExpressionContext::pushInst(std::shared_ptr<Expression> current_inst)
{
    if(!expression_stack.size() || expression_stack.last() != current_inst)
        expression_stack.append(current_inst);
}

std::shared_ptr<Expression> ExpressionContext::popInst()
{
    auto lastx = expression_stack.takeLast();
    return lastx;
}

std::shared_ptr<const BaseRule> ExpressionContext::currentExpressionRule() const {
    if(rule_stack.size())
        return rule_stack.last();
    return nullptr;
}

void ExpressionContext::pushExpressionRule(std::shared_ptr<const BaseRule> inst) {
    if(!rule_stack.size() || rule_stack.last() != inst)
        rule_stack.append(inst);
}

std::shared_ptr<const BaseRule> ExpressionContext::popExpressionRule()
{
    return rule_stack.takeLast();
}