#include "radiation_handler.h"
#include "core/config.h"
#include "resources.h"
#include "core/module.h"
#include "core/style.h"
#include "common/projection/reprojector.h"

#ifdef _MSC_VER
#include <direct.h>
#endif

namespace satdump
{
    void RadiationViewerHandler::init()
    {
        products = (RadiationProducts *)ViewerHandler::products;

        for (int c = 0; c < (int)products->channel_counts.size(); c++)
            select_channel_image_str += products->get_channel_name(c) + '\0';

        update();
    }

    void RadiationViewerHandler::update()
    {
        if (selected_visualization_id == 0)
        {
            RadiationMapCfg cfg;
            cfg.channel = select_channel_image_id + 1;
            cfg.radius = 5;
            cfg.min = map_min;
            cfg.max = map_max;
            map_img = make_radiation_map(*products, cfg);
            image_view.update(map_img);
        }
        else if (selected_visualization_id == 1)
        {
            graph_values.clear();
            graph_values.resize(products->channel_counts.size());
            for (int c = 0; c < (int)products->channel_counts.size(); c++)
            {
                for (int i = 0; i < (int)products->channel_counts[c].size(); i++)
                    graph_values[c].push_back(products->channel_counts[c][i]);
            }
        }
    }

    void RadiationViewerHandler::drawMenu()
    {
        if (ImGui::CollapsingHeader("View"))
        {
            if (ImGui::RadioButton(u8"\uf84c   Map", &selected_visualization_id, 0))
                update();
            if (ImGui::RadioButton(u8"\uf437   Graph", &selected_visualization_id, 1))
                update();

            if (selected_visualization_id == 0)
            {
                if (ImGui::Combo("###mapchannelcomboid", &select_channel_image_id, select_channel_image_str.c_str()))
                    update();
                ImGui::SetNextItemWidth(ImGui::GetWindowWidth() / 2);
                if (ImGui::DragInt("##Min", &map_min, 1.0f, 0, 255, "Min: %d", ImGuiSliderFlags_AlwaysClamp))
                    update();
                ImGui::SameLine();
                ImGui::SetNextItemWidth(ImGui::GetWindowWidth() / 2);
                if (ImGui::DragInt("##Max", &map_max, 1.0f, 0, 255, "Max: %d", ImGuiSliderFlags_AlwaysClamp))
                    update();
            }

            if (selected_visualization_id != 0)
                style::beginDisabled();
            if (ImGui::Button("Save"))
            {
                std::string default_path = config::main_cfg["satdump_directories"]["default_image_output_directory"]["value"].get<std::string>();
#ifdef _MSC_VER
                if (default_path == ".")
                {
                    char* cwd;
                    cwd = _getcwd(NULL, 0);
                    if (cwd != 0)
                        default_path = cwd;
                }
                default_path += "\\";
#else
                default_path += "/";
#endif
                std::string default_name = default_path + products->instrument_name + "_map.png";

#ifndef __ANDROID__
                auto result = pfd::save_file("Save Image", default_name, {
                    "PNG Files", "*.png",
                    "JPEG 2000 Files", "*.j2k",
                    "JPEG Files", "*.jpg *.jpeg"
                    });
                while (!result.ready(1000))
                    std::this_thread::sleep_for(std::chrono::milliseconds(1));

                if (result.result().size() > 0)
                {
                    std::string path = result.result();
                    logger->info("Saving current image at %s", path.c_str());
                    map_img.save_img(path);
                }
#else
                std::string path = "/storage/emulated/0/" + default_name;
                logger->info("Saving current image at %s", path.c_str());
                map_img.save_img("" + path);
#endif
            }
            if (selected_visualization_id != 0)
                style::endDisabled();

            if (!canBeProjected())
                style::beginDisabled();
            ImGui::Checkbox("Project", &should_project);
            if (!canBeProjected())
                style::endDisabled();
        }
    }

    void RadiationViewerHandler::drawContents(ImVec2 win_size)
    {
        if (selected_visualization_id == 0)
        {
            image_view.draw(win_size);
        }
        else if (selected_visualization_id == 1)
        {
            ImGui::BeginChild("RadiationPlot");
            for (int i = 0; i < (int)products->channel_counts.size(); i++)
            {
                ImGui::BeginChild(("RadiationPlotChild##" + std::to_string(i)).c_str(), ImVec2(ImGui::GetWindowWidth(), 50 * ui_scale));
                ImGui::PlotLines(products->get_channel_name(i).c_str(), graph_values[i].data(), graph_values[i].size(), 0, NULL, 0, 255, ImVec2(ImGui::GetWindowWidth() - 100 * ui_scale, 30 * ui_scale));
                ImGui::Spacing();
                ImGui::Separator();
                ImGui::Spacing();
                ImGui::EndChild();
            }
            ImGui::EndChild();
        }
    }

    float RadiationViewerHandler::drawTreeMenu()
    {
        return 0;
    }

    bool RadiationViewerHandler::canBeProjected()
    {
        return selected_visualization_id == 0;
    }

    bool RadiationViewerHandler::hasProjection()
    {
        return projection_ready && should_project;
    }

    bool RadiationViewerHandler::shouldProject()
    {
        return should_project;
    }

    void RadiationViewerHandler::updateProjection(int width, int height, nlohmann::json settings, float *progess)
    {
        if (canBeProjected())
        {
            RadiationMapCfg cfg;
            cfg.channel = select_channel_image_id + 1;
            cfg.radius = 5;
            cfg.min = map_min;
            cfg.max = map_max;
            auto map_img = make_radiation_map(*products, cfg, true);

            reprojection::ReprojectionOperation op;
            op.source_prj_info = nlohmann::json::parse("{\"type\":\"equirectangular\",\"tl_lon\":-180,\"tl_lat\":90,\"br_lon\":180,\"br_lat\":-90}");
            op.target_prj_info = settings;
            op.img = map_img;

            op.output_width = width;
            op.output_height = height;

            reprojection::ProjectionResult res = reprojection::reproject(op, progess);
            projected_img = res.img;
            projection_ready = true;
        }
        else
        {
            logger->error("Current image can't be projected!");
        }
    }

    image::Image<uint16_t> &RadiationViewerHandler::getProjection()
    {
        return projected_img;
    }
}