#include "TSystem.h"
#include "Riostream.h"

#include <string>

#include "ttextfile.h"

ClassImp(TTextFile)

//______________________________________________________________________________
TTextFile::TTextFile() : TNamed() {}

//______________________________________________________________________________
TTextFile::TTextFile(const Char_t* fileName) : TNamed() {
    TString fN(fileName), dN(".");

    if (fN.Contains("/")) {
        dN = fN(0, fN.Last('/'));
	fN = fN(fN.Last('/') + 1, fN.Length());
    }

    TSystemFile* f = new TSystemFile(fN.Data(), dN.Data());
    SetFile(f);
    delete f;
}

//______________________________________________________________________________
TTextFile::TTextFile(TSystemFile* file) : TNamed() {
    SetFile(file);
}

//______________________________________________________________________________
TTextFile::TTextFile(const Char_t* fileName, const Char_t* name, const Char_t* title) : TNamed(name, title) {
    TString fN(fileName), dN(".");

    if (fN.Contains("/")) {
        dN = fN(0, fN.Last('/'));
	fN = fN(fN.Last('/') + 1, fN.Length());
    }

    TSystemFile* f = new TSystemFile(fN.Data(), dN.Data());
    SetFile(f);
    delete f;
}

//______________________________________________________________________________
TTextFile::TTextFile(TSystemFile* file, const Char_t* name, const Char_t* title) : TNamed(name, title) {
    SetFile(file);
}

//______________________________________________________________________________
TTextFile::TTextFile(const TTextFile& ttf) : TNamed(ttf) {
    SetFile(ttf.fFileName.Data());
}

//______________________________________________________________________________
TTextFile::~TTextFile() {}

//______________________________________________________________________________
void TTextFile::SetFile(const Char_t* fileName) {
    TString fN(fileName), dN(".");

    if (fN.Contains("/")) {
        dN = fN(0, fN.Last('/'));
	fN = fN(fN.Last('/') + 1, fN.Length());
    }

    TSystemFile* f = new TSystemFile(fN.Data(), dN.Data());
    SetFile(f);
    delete f;
}

//______________________________________________________________________________
void TTextFile::SetFile(TSystemFile* file) {
    Char_t* path = Form("%s/%s", file->GetTitle(), file->GetName());
    Long_t id, size, flags, modtime;

    if (gSystem->GetPathInfo(path, &id, &size, &flags, &modtime)) {
        Error("SetFile", "File is not accessible!");
	return;
    }

    if ((flags & 2) > 0) {
	Error("SetFile", "Provided File is a directory!");
	return;
    }

    fFileName = path;
    fFileContent = "";
    fSaveTime.Set();
    fModificationTime.Set(modtime);

    ifstream in;
    in.open(path);
    std::string line;

    while (!in.eof()) {
	std::getline(in, line);
	fFileContent += line.c_str();
        fFileContent += "\n";
    }

    in.close();
}

//______________________________________________________________________________
Int_t TTextFile::Merge(TCollection* tc) {
    TIter files(tc);

    while (TObject* obj = files()) {
	TTextFile* f = dynamic_cast<TTextFile*>(obj);
	if (f == 0)
	    continue;

	if (fFileName.CompareTo(f->GetFileName()) != 0) {
	    Error("Merge", "Only Files of same Name can be merged!");
            continue;
	}

	if (fModificationTime.Get() < f->GetTimeFileModified().Get()) {
            fFileContent      = f->GetFileContent();
	    fModificationTime = f->GetTimeFileModified();
	    fSaveTime         = f->GetTimeFileSaved();
	}
    }

    return 1;
}