//
// Created by WolverinDEV on 29/04/2020.
//

#include <files/FileServer.h>
#include <log/LogUtils.h>

#include <experimental/filesystem>
#include <local_server/clnpath.h>
#include <event2/thread.h>

namespace fs = std::experimental::filesystem;

using namespace ts::server;

struct Nothing {};

template <typename ErrorType, typename ResponseType>
inline void print_fs_response(const std::string& message, const std::shared_ptr<file::ExecuteResponse<file::filesystem::DetailedError<ErrorType>, ResponseType>>& response) {
    if(response->status == file::ExecuteStatus::ERROR)
        logError(LOG_FT, "{}: {} => {}", message, (int) response->error().error_type, response->error().error_message);
    else if(response->status == file::ExecuteStatus::SUCCESS)
        logMessage(LOG_FT, "{}: success", message);
    else
        logWarning(LOG_FT, "Unknown response state ({})!", (int) response->status);
}

template <typename ErrorType, typename ResponseType>
inline void print_ft_response(const std::string& message, const std::shared_ptr<file::ExecuteResponse<ErrorType, ResponseType>>& response) {
    if(response->status == file::ExecuteStatus::ERROR)
        logError(LOG_FT, "{}: {} => {}", message, (int) response->error().error_type, response->error().error_message);
    else if(response->status == file::ExecuteStatus::SUCCESS)
        logMessage(LOG_FT, "{}: success", message);
    else
        logWarning(LOG_FT, "Unknown response state ({})!", (int) response->status);
}

inline void print_query(const std::string& message, const file::filesystem::AbstractProvider::directory_query_response_t& response) {
    if(response.status == file::ExecuteStatus::ERROR)
        logError(LOG_FT, "{}: {} => {}", message, (int) response.error().error_type, response.error().error_message);
    else if(response.status == file::ExecuteStatus::SUCCESS) {
        const auto& entries = response.response();
        logMessage(LOG_FT, "{}: Found {} entries", message, entries.size());
        for(auto& entry : entries) {
            if(entry.type == file::filesystem::DirectoryEntry::FILE)
                logMessage(LOG_FT, "  - File {}", entry.name);
            else if(entry.type == file::filesystem::DirectoryEntry::DIRECTORY)
                logMessage(LOG_FT, "  - Directory {}", entry.name);
            else
                logMessage(LOG_FT, "  - Unknown {}", entry.name);
            logMessage(LOG_FT, "    Write timestamp: {}", std::chrono::floor<std::chrono::seconds>(entry.modified_at.time_since_epoch()).count());
            logMessage(LOG_FT, "    Size: {}", entry.size);
        }
    } else
        logWarning(LOG_FT, "{}: Unknown response state ({})!", message, (int) response.status);
}

int main() {
    evthread_use_pthreads();

    auto log_config = std::make_shared<logger::LoggerConfig>();
    log_config->terminalLevel = spdlog::level::trace;
    logger::setup(log_config);

    std::string error{};
    if(!file::initialize(error)) {
        logError(LOG_FT, "Failed to initialize file server: {}", error);
        return 0;
    }
    logMessage(LOG_FT, "File server started");
    auto instance = file::server();


#if 0
    auto& fs = instance->file_system();
    {
        auto response = fs.initialize_server(0);
        response->wait();
        print_fs_response("Server init result", response);
        if(response->status != file::ExecuteStatus::SUCCESS)
            return 0;
    }


    {
        auto response = fs.create_channel_directory(0, 2, "/");
        response->wait();
        print_fs_response("Channel dir create A", response);
    }


    {
        auto response = fs.create_channel_directory(0, 2, "/test-folder/");
        response->wait();
        print_fs_response("Channel dir create B", response);
    }


    {
        auto response = fs.create_channel_directory(0, 2, "../test-folder/");
        response->wait();
        print_fs_response("Channel dir create C", response);
    }


    {
        auto response = fs.create_channel_directory(0, 2, "./test-folder/../test-folder-2");
        response->wait();
        print_fs_response("Channel dir create D", response);
    }

    {
        auto response = fs.query_channel_directory(0, 2, "/");
        response->wait();
        print_query("Channel query", *response);
    }

    {
        auto response = fs.query_icon_directory(0);
        response->wait();
        print_query("Icons", *response);
    }

    {
        auto response = fs.query_avatar_directory(0);
        response->wait();
        print_query("Avatars", *response);
    }

    {
        auto response = fs.rename_channel_file(0, 2, "./test-folder/../test-folder-2", "./test-folder/../test-folder-3");
        response->wait();
        print_fs_response("Folder rename A", response);
    }

    {
        auto response = fs.rename_channel_file(0, 2, "./test-folder/../test-folder-3", "./test-folder/../test-folder-2");
        response->wait();
        print_fs_response("Folder rename B", response);
    }
#endif

#if 1
    auto& ft = instance->file_transfer();

    ft.callback_transfer_finished = [](const std::shared_ptr<file::transfer::Transfer>& transfer) {
        logMessage(0, "Transfer finished");
    };

    ft.callback_transfer_started = [](const std::shared_ptr<file::transfer::Transfer>& transfer) {
        logMessage(0, "Transfer started");
    };

    ft.callback_transfer_aborted = [](const std::shared_ptr<file::transfer::Transfer>& transfer, const file::transfer::TransferError& error) {
        logMessage(0, "Transfer aborted ({}/{})", (int) error.error_type, error.error_message);
    };

    ft.callback_transfer_statistics = [](const std::shared_ptr<file::transfer::Transfer>& transfer, const file::transfer::TransferStatistics& stats) {
        logMessage(0, "Transfer stats. New file bytes: {}, delta bytes send {}", stats.delta_file_bytes_transferred, stats.delta_network_bytes_send);
    };

    {
        auto response = ft.initialize_channel_transfer(file::transfer::Transfer::DIRECTION_DOWNLOAD, 0, 2, {
                "test2.txt",
                false,
                4,
                120,
                16
        });
        response->wait();
        print_ft_response("Download test.txt", response);
        if(response->succeeded())
            logMessage(LOG_FT, "Download key: {}", std::string{response->response()->transfer_key, TRANSFER_KEY_LENGTH});
    }
#endif

    std::this_thread::sleep_for(std::chrono::seconds{120});
    //TODO: Test file locking
    file::finalize();
    return 0;
}