#include "elementreduction.h"
#include <iostream>
ElementReduction::ElementReduction(const QList<BranchStruc *> &branchList):branchList(branchList)
{

}

ElementReduction::~ElementReduction()
{

}

void ElementReduction::doIt()
{
    QHash<QString,QVector<BranchStruc *> > linkage;
    //先记录元件之间的连接关系
    foreach(BranchStruc* v,this->branchList)
    {
        std::cout<<v->id.toStdString()<<std::endl;
        linkage[v->fromID].push_back(v);
        linkage[v->toID].push_back(v);
    }
    this->visit(this->branchList.last(),linkage);
}

void ElementReduction::visit(BranchStruc* branch,QHash<QString,QVector<BranchStruc *> >& linkage)
{
    std::cout<<"visit "<<branch->id.toStdString()<<std::endl;
    if(this->visited.contains(branch->id))
        return;
    this->visited[branch->id]=0;
    QString next;
    next=branch->toID;
    QVector<BranchStruc* > nextVec;
    nextVec=linkage[next];
    foreach(BranchStruc* v,nextVec)
    {
        if(v->dispose)
            continue;//丢弃的元件
        if(v->isZeroBranch)//是0阻抗
        {
            //进行合并
            std::cout<<"merge "<<v->id.toStdString()<<std::endl;
            branch->toID=v->toID;
            v->dispose=true;
            foreach(BranchStruc* change,linkage[branch->toID])
            {
                if(change->id==branch->id)
                    continue;
                change->fromID=branch->toID;
            }
        }
        this->visit(branch,linkage);//深度优先
    }
}