#include "ConfigMechanicalInterface.h"
#include "ConfigThermalInterface.h"

int main() {
    // INPUT ARGS
    fs_path config_file(ASSETS_DIR "/top/config_Lshape.json");
    fs_path model_file(
    ASSETS_DIR "/voxel_model/Lshape_model.txt");
    bool extract_inner_vtk = true;
    // END INPUT

    std::string model_name = model_file.filename().replace_extension();
    Tensor3d tr_model = ReadTensor3d(model_file);
    fs_path output_dir(OUTPUT_DIR);
    spdlog::info("Read config from '{}'", config_file.string());
    spdlog::info("Read model  from '{}'", model_file.string());
    spdlog::info("Output to '{}'", output_dir.string());

    std::shared_ptr<ConfigMechanicalInterface> sp_mech_inter = std::make_shared<ConfigMechanicalInterface>(
            config_file,tr_model);
    std::string ex_name = sp_mech_inter->ex_name_;
    spdlog::critical("Mechanical TO example: {}", ex_name);

    // initialize Top3d
    auto sp_mech_top3d = sp_mech_inter->CreatTop();
    // loop
    spdlog::critical("start to mechanical top opt ...");
    Tensor3d t_me_rho = sp_mech_top3d->TopOptMainLoop(false, extract_inner_vtk);
    // postprocess
    {
        spdlog::critical("extract compliance and volume each iteration ...");
        // extract compliance and volume each iteration
        fs_path compliance_path =
                output_dir / "txt" / ex_name /
                (ex_name + "_MeTop" + "_compliance.txt");
        WriteStdVector(compliance_path, sp_mech_top3d->v_compliance_);
        spdlog::info("write compliance txt to: {}", compliance_path.c_str());

        fs_path volume_path =
                output_dir / "txt" / ex_name /
                (ex_name + "_MeTop" + "_volume.txt");
        WriteStdVector(volume_path, sp_mech_top3d->v_volume_);
        spdlog::info("write volume txt to: {}", volume_path.c_str());

        // extract rho (txt and vtk)
        fs_path rho_txt_path =
                output_dir / "txt" / ex_name /
                (ex_name + "_MeTop" + "_rho.txt");
        WriteTensor3d(rho_txt_path, t_me_rho);
        spdlog::info("write density txt to: {}", rho_txt_path.c_str());

        fs_path rho_vtk_path =
                output_dir / "vtk" / ex_name /
                (ex_name + "_MeTop" + "_rho.vtk");
        WriteTensorToVtk(rho_vtk_path, t_me_rho, sp_mech_inter->sp_mesh_);
        spdlog::info("write density vtk to: {}", rho_vtk_path.c_str());
    }
    if (extract_inner_vtk) {
        if (sp_mech_top3d->v_ten_rho_.size() == 0) {
            throw std::runtime_error("v_ten_rho_ is empty");
        }
        for (int i = 0; i <sp_mech_top3d->v_ten_rho_.size(); ++i) {
            std::stringstream ss;
            ss << std::setw(3) << std::setfill('0') << i;
            std::string suffix_idx = ss.str();
            fs_path inner_vtk_path =
                    output_dir / "vtk" / ex_name /
                    (ex_name + "_MeTop" + "_inner") / (suffix_idx + ".vtk");
            WriteTensorToVtk(inner_vtk_path,sp_mech_top3d->v_ten_rho_[i],
                             sp_mech_inter->sp_mesh_);
            if (i == 0) {
                spdlog::info("write inner vtk(0,1,...) to: {}",
                             inner_vtk_path.c_str());
            }
        }
    }
}