#include "module_msg_instruments_decoder.h"
#include <fstream>
#include "logger.h"
#include <filesystem>
#include "imgui/imgui.h"
#include "common/utils.h"
#include "common/ccsds/ccsds_standard/demuxer.h"
#include "common/ccsds/ccsds_standard/vcdu.h"
#include "imgui/imgui_image.h"

namespace meteosat
{
    MSGInstrumentsDecoderModule::MSGInstrumentsDecoderModule(std::string input_file, std::string output_file_hint, nlohmann::json parameters)
        : ProcessingModule(input_file, output_file_hint, parameters)
    {
    }

    void MSGInstrumentsDecoderModule::process()
    {
        filesize = getFilesize(d_input_file);
        std::ifstream data_in(d_input_file, std::ios::binary);

        logger->info("Using input frames " + d_input_file);

        time_t lastTime = 0;
        uint8_t cadu[1279];

        // Demuxers
        ccsds::ccsds_standard::Demuxer demuxer_vcid0(1109, false, 0, 0);
        ccsds::ccsds_standard::Demuxer demuxer_vcid1(1109, false, 0, 0);

        // Setup readers
        seviri_reader.d_mode_is_rss = false;
        std::string seviri_directory = d_output_file_hint.substr(0, d_output_file_hint.rfind('/')) + "/SEVIRI";
        if (!std::filesystem::exists(seviri_directory))
            std::filesystem::create_directory(seviri_directory);
        seviri_reader.d_directory = seviri_directory;

        while (input_data_type == DATA_FILE ? !data_in.eof() : input_active.load())
        {
            // Read a buffer
            if (input_data_type == DATA_FILE)
                data_in.read((char *)cadu, 1279);
            else
                input_fifo->read((uint8_t *)cadu, 1279);

            // Parse this transport frame
            ccsds::ccsds_standard::VCDU vcdu = ccsds::ccsds_standard::parseVCDU(cadu);

            if (vcdu.vcid == 0)
            {
                std::vector<ccsds::CCSDSPacket> ccsdsFrames = demuxer_vcid0.work(cadu);
                for (ccsds::CCSDSPacket &pkt : ccsdsFrames)
                    if (pkt.header.apid == 2046)
                        seviri_reader.work(vcdu.spacecraft_id, pkt);
            }
            else if (vcdu.vcid == 1)
            {
                std::vector<ccsds::CCSDSPacket> ccsdsFrames = demuxer_vcid1.work(cadu);
                for (ccsds::CCSDSPacket &pkt : ccsdsFrames)
                    ; // WIP
            }

            progress = data_in.tellg();
            if (time(NULL) % 10 == 0 && lastTime != time(NULL))
            {
                lastTime = time(NULL);
                logger->info("Progress " + std::to_string(round(((double)progress / (double)filesize) * 1000.0) / 10.0) + "%%");
            }
        }

        data_in.close();

        seviri_reader.saveImages();
    }

    void MSGInstrumentsDecoderModule::drawUI(bool window)
    {
        ImGui::Begin("MSG Instruments Decoder", NULL, window ? 0 : NOWINDOW_FLAGS);

        if (ImGui::BeginTabBar("Images TabBar", ImGuiTabBarFlags_None))
        {
            if (seviri_reader.textureID == 0)
            {
                seviri_reader.textureID = makeImageTexture();
                seviri_reader.textureBuffer = new uint32_t[1000 * 1000];
                memset(seviri_reader.textureBuffer, 0, sizeof(uint32_t) * 1000 * 1000);
                seviri_reader.hasToUpdate = true;
            }

            if (seviri_reader.hasToUpdate)
            {
                seviri_reader.hasToUpdate = false;
                updateImageTexture(seviri_reader.textureID, seviri_reader.textureBuffer, 1000, 1000);
            }

            if (ImGui::BeginTabItem("Ch 4"))
            {
                ImGui::Image((void *)(intptr_t)seviri_reader.textureID, {200 * ui_scale, 200 * ui_scale});
                ImGui::SameLine();
                ImGui::BeginGroup();
                ImGui::Button("Status", {200 * ui_scale, 20 * ui_scale});
                if (seviri_reader.is_saving)
                    ImGui::TextColored(style::theme.green, "Savinf...");
                else
                    ImGui::TextColored(style::theme.orange, "Receiving...");
                // else
                //     ImGui::TextColored(style::theme.red, "Idle (Image)...");
                ImGui::EndGroup();
                ImGui::EndTabItem();
            }
        }
        ImGui::EndTabBar();

        if (!streamingInput)
            ImGui::ProgressBar((double)progress / (double)filesize, ImVec2(ImGui::GetContentRegionAvail().x, 20 * ui_scale));

        ImGui::End();
    }

    std::string MSGInstrumentsDecoderModule::getID()
    {
        return "msg_instruments";
    }

    std::vector<std::string> MSGInstrumentsDecoderModule::getParameters()
    {
        return {};
    }

    std::shared_ptr<ProcessingModule> MSGInstrumentsDecoderModule::getInstance(std::string input_file, std::string output_file_hint, nlohmann::json parameters)
    {
        return std::make_shared<MSGInstrumentsDecoderModule>(input_file, output_file_hint, parameters);
    }
}