#include "AbstractTask.h"

#include <algorithm>
#include <filesystem>
#include <thread>
#include <regex>

#include <opencv2/opencv.hpp>

#include "AsstUtils.hpp"
#include "Controller.h"
#include "Logger.hpp"
#include "Resource.h"
#include "AbstractTaskPlugin.h"

using namespace asst;

AbstractTask::AbstractTask(AsstCallback callback, void* callback_arg, std::string task_chain)
    : m_callback(callback),
    m_callback_arg(callback_arg),
    m_task_chain(std::move(task_chain))
{
    ;
}

bool asst::AbstractTask::run()
{
    callback(AsstMsg::SubTaskStart, basic_info());
    for (m_cur_retry = 0; m_cur_retry <= m_retry_times; ++m_cur_retry) {
        if (_run()) {
            callback(AsstMsg::SubTaskCompleted, basic_info());
            return true;
        }
        if (need_exit()) {
            return false;
        }
        int delay = Resrc.cfg().get_options().task_delay;
        sleep(delay);

        if (!on_run_fails()) {
            callback(AsstMsg::SubTaskError, basic_info());
            return false;
        }
    }
    callback(AsstMsg::SubTaskError, basic_info());
    return false;
}

AbstractTask& asst::AbstractTask::set_exit_flag(bool* exit_flag) noexcept
{
    m_exit_flag = exit_flag;
    return *this;
}

AbstractTask& asst::AbstractTask::set_retry_times(int times) noexcept
{
    m_retry_times = times;
    return *this;
}

void asst::AbstractTask::clear_plugin() noexcept
{
    m_plugins.clear();
}

json::value asst::AbstractTask::basic_info() const
{
    if (m_basic_info_cache.empty()) {
        std::string class_name = typeid(*this).name();
        std::string task_name;
        // typeid.name() 结果可能和编译器有关，所以这里使用正则尽可能保证结果正确。
        // 但还是不能完全保证，如果不行的话建议 override
        std::regex regex("[a-zA-Z]+Task");
        std::smatch match_obj;
        if (std::regex_search(class_name, match_obj, regex)) {
            task_name = match_obj[0].str();
        }
        else {
            task_name = class_name;
        }

        m_basic_info_cache = json::object{
            { "taskchain", m_task_chain },
            { "class", class_name },
            { "subtask", task_name },
            { "details", json::object() }
            //{ "CurRetryTimes", m_cur_retry },
            //{ "MaxRetryTimes", m_retry_times }
        };
    }
    return m_basic_info_cache;
}

json::value asst::AbstractTask::basic_info_with_what(std::string what) const
{
    json::value info = basic_info();
    info["what"] = std::move(what);
    return info;
}

bool AbstractTask::sleep(unsigned millisecond)
{
    if (need_exit()) {
        return false;
    }
    if (millisecond == 0) {
        return true;
    }
    auto start = std::chrono::steady_clock::now();
    long long duration = 0;

    Log.trace("ready to sleep", millisecond);

    while (!need_exit() && duration < millisecond) {
        duration = std::chrono::duration_cast<std::chrono::milliseconds>(
            std::chrono::steady_clock::now() - start).count();
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
        std::this_thread::yield();
    }
    Log.trace("end of sleep", millisecond);

    return !need_exit();
}

bool AbstractTask::save_image(const cv::Mat image, const std::string& dir)
{
    std::filesystem::create_directory(dir);
    const std::string time_str = utils::string_replace_all(utils::string_replace_all(utils::get_format_time(), " ", "_"), ":", "-");
    const std::string filename = dir + time_str + ".png";

    bool ret = cv::imwrite(filename, image);

    return ret;
}

bool asst::AbstractTask::need_exit() const
{
    return m_exit_flag != nullptr && *m_exit_flag == true;
}

void asst::AbstractTask::callback(AsstMsg msg, const json::value& detail)
{
    for (TaskPluginPtr plugin : m_plugins) {
        plugin->set_exit_flag(m_exit_flag);
        plugin->set_task_ptr(this);

        if (!plugin->verify(msg, detail)) {
            continue;
        }

        plugin->run();

        if (plugin->block()) {
            break;
        }
    }
    m_callback(msg, detail, m_callback_arg);
}

void asst::AbstractTask::click_return_button()
{
    LogTraceFunction;
    const auto return_task_ptr = Task.get("Return");

    Rect ReturnButtonRect = return_task_ptr->specific_rect;

    Ctrler.click(ReturnButtonRect);
    sleep(return_task_ptr->rear_delay);
}