#include <QDebug>
#include <QUrl>
#include <QStandardPaths>
#include <QDir>

extern "C" {
#include <git2.h>
}
#include "git.h"
#include "passphraseprovider.h"



Git::Git() {
    git_libgit2_init();
};

Git::~Git() {
    git_libgit2_shutdown();
};

bool Git::clone(QUrl url, QString dir_out_path) {
    auto ret = false;
    auto tmp_dir_path =  QStandardPaths::writableLocation(
                             QStandardPaths::CacheLocation).append("/clone");
                             
    auto gitCred = new UTGitCredProvider();
    pt2cred_acquire_cb = gitCred->cred_acquire_cb;

    QDir tmp_dir(tmp_dir_path);
    tmp_dir.removeRecursively();
    
	git_repository *cloned_repo = NULL;
	git_clone_options clone_opts = GIT_CLONE_OPTIONS_INIT;
	git_checkout_options checkout_opts = GIT_CHECKOUT_OPTIONS_INIT;
    
    checkout_opts.checkout_strategy = GIT_CHECKOUT_SAFE;
	clone_opts.checkout_opts = checkout_opts;
	clone_opts.fetch_opts.callbacks.credentials = gitCred->*pt2cred_acquire_cb;
    
    qDebug() << "Cloning " << url << " in " << tmp_dir_path;
    auto error = git_clone(&cloned_repo, url.toString().toLocal8Bit().constData(), tmp_dir_path.toLocal8Bit().constData(), &clone_opts);
    if (cloned_repo) {
        git_repository_free(cloned_repo);
    }
    if(error) {
        const git_error *err = giterr_last();
		if (err) { 
            qDebug() << "ERROR " << err->klass << ": " << err->message;
        }
		else {
            qDebug() << "ERROR " << error << ": no detailed info";
        }
    }
    else {
        qDebug() << "Removing destination";
        QDir dir_out(dir_out_path);
        dir_out.removeRecursively();

        qDebug() << "Moving cloned dir to destination";
        QDir dir;
        qDebug() <<  tmp_dir_path << " to " << dir_out_path;
        ret = dir.rename(tmp_dir_path, dir_out_path);
    }
    tmp_dir.removeRecursively();
    delete gitCred;
    return !error and ret;
}