#include <hex/helpers/utils.hpp>
#include <hex/api/localization.hpp>

#include <content/tools_entries.hpp>

#include <imgui.h>

#include <hex/ui/imgui_imhex_extensions.h>

namespace hex::plugin::builtin {
    namespace impl {
        void drawInvariantMultiplicationDecoder() {
            static u64 divisor = 1;
            static u64 multiplier = 1;
            static u64 numBits = 32;

            ImGui::TextFormattedWrapped("{}", "hex.builtin.tools.invariant_multiplication.description"_lang);

            ImGui::NewLine();

            if (ImGui::BeginChild("##calculator", ImVec2(0, ImGui::GetTextLineHeightWithSpacing() * 5), true)) {
                constexpr static u64 min = 1, max = 64;
                ImGui::SliderScalar("hex.builtin.tools.invariant_multiplication.num_bits"_lang, ImGuiDataType_U64, &numBits, &min, &max);
                ImGui::NewLine();

                ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(0, 0));
                ImGui::PushStyleColor(ImGuiCol_ChildBg, ImGui::GetStyleColorVec4(ImGuiCol_TableRowBgAlt));
                if (ImGui::BeginChild("##calculator", ImVec2(0, ImGui::GetTextLineHeightWithSpacing() + 12_scaled), true)) {
                    ImGui::PushItemWidth(100_scaled);

                    ImGui::TextUnformatted("X /");
                    ImGui::SameLine();
                    if (ImGui::InputScalar("##divisor", ImGuiDataType_U64, &divisor)) {
                        if (divisor == 0)
                            divisor = 1;

                        multiplier = ((1LLU << (numBits + 1)) / divisor) + 1;
                    }

                    ImGui::SameLine();

                    ImGui::TextUnformatted(" <=> ");

                    ImGui::SameLine();
                    ImGui::TextUnformatted("( X *");
                    ImGui::SameLine();
                    if (ImGui::InputHexadecimal("##multiplier", &multiplier)) {
                        if (multiplier == 0)
                            multiplier = 1;
                        divisor = ((1LLU << (numBits + 1)) / multiplier) + 1;
                    }

                    ImGui::SameLine();
                    ImGui::TextFormatted(") >> {}", numBits + 1);

                    ImGui::PopItemWidth();
                }
                ImGui::EndChild();
                ImGui::PopStyleColor();

                ImGui::PopStyleVar();
            }
            ImGui::EndChild();
        }
    }
}