#include "ProcessUtility.h"
#include "BoostLog.h"
#include "boost/algorithm/string.hpp"
#include <regex>
#include <sstream>
#ifdef __linux__
#include <unistd.h>
#elif defined(_WIN32)
#include <boost/winapi/dll.hpp>
#endif

bool DockerUtility::supervisorStatus(std::string_view container, const std::string &module) {
    using namespace boost::process;
    boost::process::ipstream ips;
    auto docker = search_path("docker");
    auto ctl = boost::process::search_path("supervisorctl");
    auto env = boost::this_process::environment();
    if (env.count("USER")) {
        auto user = env["USER"].to_string();
        system(docker, args = {"exec", "-u", user, container.data(), "supervisorctl", "status", module}, std_out > ips);
        std::string line;
        if (!ips) return false;
        std::getline(ips, line);
        if (line.empty()) return false;
        boost::algorithm::trim(line);
        std::vector<std::string> s;
        boost::algorithm::split(s, line, boost::algorithm::is_any_of(" "), boost::algorithm::token_compress_on);
        if (s.size() < 3) return false;
        return s.at(2) == "RUNNING";
    } else {
        LOG(error) << "this_process did not contain USER env value.";
        return false;
    }
}

bool DockerUtility::running(std::string_view container, std::error_code &error) {
#ifdef __linux__
    using namespace boost::process;
    boost::process::ipstream stream;
    std::ostringstream oss;
    oss << "docker ps -q --filter \"name=" << container << "\" --filter \"status=running\"";
    system(oss.str(), boost::process::std_out > stream, error);
    if (error) return false;
    bool ret = false;
    std::string line;
    while (std::getline(stream, line) && !line.empty()) {
        ret = true;
        break;
    }
    return ret;
#else
    return false;
#endif
}

std::string NativeUtility::currentExecutable() {
// win32 GetModuleFileNameA
#ifdef __linux__
    char buffer[512] = {0};
    auto status = readlink("/proc/self/exe", buffer, sizeof(buffer));
    return status == -1 ? std::string() : std::string(buffer);
#else
    char buffer[MAX_PATH];
    boost::winapi::get_module_file_name(nullptr, buffer, MAX_PATH);
    return buffer;
#endif
}

std::string NativeUtility::executableDirectory() {
    auto path = currentExecutable();
#ifdef __linux__
    auto slashPos = path.find_last_of("/");
#else
    auto slashPos = path.find_last_of("\\");
#endif
    return path.substr(0, slashPos);
}

std::string NativeUtility::applicationDataDirectory(bool create) {
    std::string directory;

#ifdef WIN32
    DWORD bufferSize = GetEnvironmentVariable("APPDATA", 0, 0);
    char *buffer = new char[bufferSize + 2];
    GetEnvironmentVariable("APPDATA", buffer, bufferSize);
    directory.assign(buffer);
    delete[] buffer;
#else
    const char *result = std::getenv("XDG_CONFIG_HOME");
    if (result && strlen(result)) {
        directory = std::string(result);
    } else {
        directory = std::string(std::getenv("HOME")) + std::string("/.config/");
    }
#endif
    auto exePath = currentExecutable();
    auto slashPos = exePath.find_last_of("\\");
    auto dotPos = exePath.find_last_of(".");
    auto appName = exePath.substr(slashPos + 1, dotPos - slashPos - 1);
    std::ostringstream oss;
    oss << directory << "/" << appName << "/";
    directory = oss.str();
    if (create) {
        try {
            std::filesystem::path path(std::filesystem::u8path(directory));
            if (!std::filesystem::exists(path)) {
                std::filesystem::create_directories(path);
            }
        } catch (...) {
        }
    }
    return directory;
}

std::string NativeUtility::homeDirectory() {
    std::string directory;
#ifdef WIN32
    DWORD bufferSize = GetEnvironmentVariable("USERPROFILE", 0, 0);
    char *buffer = new char[bufferSize + 2];
    GetEnvironmentVariable("USERPROFILE", buffer, bufferSize);
    directory.assign(buffer);
    delete[] buffer;
#else
    directory = std::string(std::getenv("HOME"));
#endif
    return directory;
}

bool NativeUtility::processRunning(const std::string &nameFilter) {
    boost::process::ipstream ips;
    // for unknow reason,on gdb debug mode,the columns is very short.
    boost::process::system("ps -eF --columns 999", boost::process::std_out > ips);
    std::string line;
    std::regex regex(nameFilter);
    while (std::getline(ips, line)) {
        if (line.empty()) continue;
        // LOG(debug) << "processRunning: " << line;
        if (std::regex_search(line, regex)) {
            return true;
        }
    }
    return false;
}

void DockerUtility::executeBashCommand(const std::string &command) {
    std::ostringstream oss;
    oss << "bash -c \"" << command << "\"";
    boost::process::system("bash -c \" \"");

    //  ps -aux | grep rosbridge | awk '{print $2}'  | xargs kill -s 9 2>/dev/null
}

void DockerUtility::execute(const std::string_view &container, const std::string_view &command) {
    std::ostringstream oss;
    auto env = boost::this_process::environment();
    auto user = env["USER"].to_string();
    oss << "docker exec -u " << user << " -d " << container << " " << command;
    using namespace boost::process;
    system(oss.str());
}

void DockerUtility::kill(const std::string &nameFilter) {
    std::ostringstream oss;
    oss << "ps -aux | grep " << nameFilter << " | awk '{print $2}'  | xargs kill -s 9 2>/dev/null";
    executeBashCommand(oss.str());
}

bool DockerUtility::containerExisted(const std::string_view &name) {
    boost::process::ipstream ips;
    std::ostringstream oss;
    oss << "docker ps -aq  --filter name=" << name;
    boost::process::system(oss.str(), boost::process::std_out > ips);
    std::string line;
    while (std::getline(ips, line)) {
        if (line.empty()) continue;
        return true;
    }
    return false;
}

void DockerUtility::supervisorctl(const std::string_view &container, const std::string &module, bool isStart) {
    using namespace boost::process;
    auto docker = search_path("docker");
    auto env = boost::this_process::environment();
    auto user = env["USER"].to_string();
    system(docker, args = {"exec", "-u", user, container.data(), "supervisorctl", isStart ? "start" : "stop", module});
}

void DockerUtility::stop(const std::string &nameFilter) {
    using namespace boost::process;
    ipstream ips;
    std::ostringstream oss;
    oss << "docker ps -q --filter \"name=" << nameFilter << "\" --filter \"status=running\" ";
    system(oss.str(), std_out > ips);
    std::string id;
    auto docker = search_path("docker");
    while (std::getline(ips, id) && !id.empty()) {
        system(docker, "stop", args += {id});
    }
}