#include "directories.hpp"
#include "config.hpp"
#include "servers.hpp"
#include "output.hpp"

#include <iostream>
#include <string>
#include <filesystem>

namespace fs = std::filesystem;

namespace dropshell
{

    namespace localfile
    {

        std::string dropshell_json()
        {
            return localpath::dropshell_dir() + "/" + filenames::dropshell_json;
        }

        std::string server_json(const std::string &server_name)
        {
            std::string serverpath = localpath::server(server_name);
            return (serverpath.empty() ? "" : (fs::path(serverpath) / filenames::server_json).string());
        }

        std::string service_env(const std::string &server_name, const std::string &service_name)
        {
            std::string servicepath = localpath::service(server_name, service_name);
            return (servicepath.empty() ? "" : (fs::path(servicepath) / filenames::service_env).string());
        }

        std::string template_info_env(const std::string &server_name, const std::string &service_name)
        {
            std::string servicepath = localpath::service(server_name, service_name);
            return (servicepath.empty() ? "" : (fs::path(servicepath) / filenames::template_info_env).string());
        }

        std::string template_example()
        {
            return localpath::agent_local() + "/template_example";
        }

        std::string bb64()
        {
            return localpath::agent_local() + "/bb64";
        }

    } // namespace localfile

    // ------------------------------------------------------------------------------------------

    namespace localpath
    {

        std::string dropshell_dir()
        {
            return current_user_home() + "/.dropshell";
        }

        std::string server(const std::string &server_name)
        {
            for (std::filesystem::path dir : gConfig().get_local_server_definition_paths())
                if (fs::exists(dir / server_name))
                    return dir / server_name;

            return "";
        }

        std::string service(const std::string &server_name, const std::string &service_name)
        {
            std::string serverpath = localpath::server(server_name);
            return ((serverpath.empty() || service_name.empty()) ? "" : (serverpath + "/" + service_name));
        }

        std::string agent_local()
        {
            return dropshell_dir() + "/agent-local";
        }
        std::string agent_remote()
        {
            return dropshell_dir() + "/agent-remote";
        }
        std::string current_user_home()
        {
            char *homedir = std::getenv("HOME");
            if (homedir)
            {
                std::filesystem::path homedir_path(homedir);
                return fs::canonical(homedir_path).string();
            }
            warning << "Couldn't determine user directory" << std::endl;
            return std::string();
        }

        std::string backups()
        {
            if (!gConfig().is_config_set())
                return "";
            return gConfig().get_backups_path();
        }

        std::string temp_files()
        {
            return dropshell_dir() + "/temp_files";
        }

        std::string template_cache()
        {
            return dropshell_dir() + "/template_cache";
        }

        bool create_directories()
        {
            std::vector<std::filesystem::path> paths = {
                dropshell_dir(),
                agent_local(),
                agent_remote(),
                template_cache(),
                backups(),
                temp_files()};
            for (auto &p : gConfig().get_local_server_definition_paths())
                paths.push_back(p);

            for (auto &p : paths)
                if (!p.empty() && !std::filesystem::exists(p))
                {
                    info << "Creating directory: " << p << std::endl;
                    std::filesystem::create_directories(p);
                }
            return false;
        }

    } // namespace localpath

    //------------------------------------------------------------------------------------------------
    // remote paths
    // DROPSHELL_DIR
    //   |-- backups
    //   |-- temp_files
    //   |-- agent
    //   |   |-- bb64
    //   |   |-- (other agent files, including _allservicesstatus.sh)
    //   |-- services
    //       |-- service name
    //           |-- config
    //               |-- service.env (actual service config)
    //           |-- template
    //               |-- (script files)
    //               |-- config
    //                   |-- service.env (default service config)
    //                   |-- (other config files for specific server&service)

    remotefile::remotefile(const std::string &server_name, const std::string &user) : mServer_name(server_name), mUser(user) {}

    std::string remotefile::service_env(const std::string &service_name) const
    {
        return remotepath(mServer_name, mUser).service_config(service_name) + "/" + filenames::service_env;
    }

    remotepath::remotepath(const std::string &server_name, const std::string &user) : mServer_name(server_name), mUser(user) {}

    std::string remotepath::DROPSHELL_DIR() const
    {
        try 
        {
            return ServerConfig(mServer_name).get_user_dir(mUser);
        } catch (const std::exception &e)
        {
            error << "Failed to get remote dropshell directory for " << mServer_name << "@" << mUser << std::endl;
            error << "Exception: " << e.what() << std::endl;
            return "";
        }
    }

    std::string remotepath::services() const
    {
        std::string dsp = DROPSHELL_DIR();
        return (dsp.empty() ? "" : (dsp + "/services"));
    }

    std::string remotepath::service(const std::string &service_name) const
    {
        std::string services_path = services();
        return (services_path.empty() ? "" : (services_path + "/" + service_name));
    }

    std::string remotepath::service_config(const std::string &service_name) const
    {
        std::string service_path = service(service_name);
        return (service_path.empty() ? "" : (service_path + "/config"));
    }

    std::string remotepath::service_template(const std::string &service_name) const
    {
        std::string service_path = service(service_name);
        return (service_path.empty() ? "" : (service_path + "/template"));
    }

    std::string remotepath::backups() const
    {
        std::string dsp = DROPSHELL_DIR();
        return (dsp.empty() ? "" : (dsp + "/backups"));
    }

    std::string remotepath::temp_files() const
    {
        std::string dsp = DROPSHELL_DIR();
        return (dsp.empty() ? "" : (dsp + "/temp_files"));
    }

    std::string remotepath::agent() const
    {
        std::string dsp = DROPSHELL_DIR();
        return (dsp.empty() ? "" : (dsp + "/agent"));
    }

    // ------------------------------------------------------------------------------------------
    // Utility functions

    std::string get_parent(const std::filesystem::path path)
    {
        if (path.empty())
            return std::string();
        return path.parent_path().string();
    }

    std::string get_child(const std::filesystem::path path)
    {
        if (path.empty())
            return std::string();
        return path.filename().string();
    }

} // namespace dropshell