#include <unistd.h>
#include <sstream>
#include <string>
#include <vector>
#include "appContext.hpp"
#include "exception.hpp"

using namespace std;
using namespace knacki::cd;

static vector<string> GetArgs(char **arr)
{
    std::vector<string> result;
    for (char *i =*arr; i; i=*(++arr))
        result.push_back(i);
    return result;
}

std::string AppContext::GetAbsolutePath(const std::string &dir, const std::string &file)
{
    stringstream ss;
    if (file[0] == '/')
        return file;
    if (dir[0] != '/')
    {
        char *cwd = get_current_dir_name();
        ss << cwd << '/';
        free(cwd);
    }
    ss << dir << '/' << file;
    return ss.str();
}

AppContext::AppContext(char **av)
{
    const std::string appName = *av;
    vector<string> args = ::GetArgs(av +1);
    string path;
    bool inArgs = true;
#ifdef __DEBUG
    bool usageOnly = false;
#else
    bool usageOnly = isatty(1);
#endif
    bool historyOnly = false;
    bool flush = false;
    bool getHistoryFile = false;
    bool verbose = false;
    string histDir;
    std::stringstream ss ("cd_");
    ss << "cd_" << getppid() << ".hist";
    string defaultHistFile = ss.str();
    string histFile;

    for (vector<string>::const_iterator i =args.cbegin(); i != args.cend(); i++)
    {
        if (!inArgs)
            if (path.empty())
                path = *i;
            else throw ArgumentException(*i);
        else if (*i == "--")
            inArgs = false;
        else if (*i == "--histdir")
            histDir = *(++i);
        else if (*i == "--histfile")
            histFile = *(++i);
        else if (*i == "--gethistfile")
            getHistoryFile = true;
        else if (*i == "--history")
            historyOnly = true;
        else if (*i == "--flush" || *i == "-F")
            flush = true;
        else if (*i == "--verbose" || *i == "-v")
            verbose = true;
        else if (*i == "--help")
            usageOnly = true;
        else if (path.empty())
            path = *i;
        else
            throw ArgumentException(*i);
    }
    if (!historyOnly && !flush && path.empty())
    {
        const char *home = getenv("HOME");
        if (home)
            path = getenv("HOME");
        // FIXME else wtf
    }
    fArgs = AppContext::Args(usageOnly, historyOnly, getHistoryFile, flush, verbose, histDir.empty() ? "/tmp/" : histDir, histFile.empty() ? defaultHistFile : histFile, path);
}

bool AppContext::IsReadOnly() const
{
    return GetArgs().historyOnly || GetArgs().getHistoryFile;
}

const AppContext::Args &AppContext::GetArgs() const
{ return fArgs; }