#include <windows.h>
#include <coffi/coffi.hpp>
#include <CLI11.hpp>
#include <spdlog/spdlog.h>

int main(int argc, char *argv[]) {
  CLI::App app("Patcher");
  std::string inputFile;
  std::string outputFile;
  app.add_option("-i,--input", inputFile, "Input exe file to patch")->required();
  app.add_option("-o,--output", outputFile, "Output patched exe file")->required();

  CLI11_PARSE(app, argc, argv);

  // Load the object file containing the main function
  COFFI::coffi objReader;
  std::string objPath = SRC_OBJECT;
  SPDLOG_INFO("Loading object file: {}", objPath);
  if (!objReader.load(objPath)) {
    spdlog::error("Failed to load object file: {}", objPath);
    return 1;
  }

  // Load the source PE file
  COFFI::coffi peReader;
  SPDLOG_INFO("Loading PE file: {}", inputFile);
  if (!peReader.load(inputFile)) {
    spdlog::error("Failed to load PE file: {}", inputFile);
    return 1;
  }

  // Find the 'main' function in the object file
  auto& symbols = *objReader.get_symbols();
  COFFI::symbol* mainSymbol = nullptr;
  for (auto &sym : symbols) {
    SPDLOG_INFO("Symbol: {}", sym.get_name());
    if (sym.get_name() == "_ref") {
      mainSymbol = &sym;
      break;
    }
  }

  if (!mainSymbol) {
    spdlog::error("Could not find 'main' symbol in object file");
    return 1;
  }

  // Get the section containing the main function
  auto& sections = objReader.get_sections();
  auto mainSection = sections[mainSymbol->get_section_number() - 1];
  
  // Calculate main function size and get its code
  uint32_t mainSize = mainSymbol->get_value() + mainSymbol->get_auxiliary_symbols().size(); // This needs proper calculation
  auto mainCodeData = mainSection->get_data();
  uint32_t mainOffset = mainSymbol->get_value();
  
  SPDLOG_INFO("Found main function at offset {} with estimated size {}", mainOffset, mainSize);

  // Find .text section in PE file
  auto& peSections = peReader.get_sections();
  COFFI::section* textSection = nullptr;
  for (auto& section : peSections) {
    if (section->get_name() == ".text") {
      textSection = section;
      break;
    }
  }

  if (!textSection) {
    spdlog::error("Could not find .text section in PE file");
    return 1;
  }

  uint32_t textSectionEnd = textSection->get_virtual_address() + textSection->get_virtual_size();
  spdlog::info("Found .text section, end at virtual address: 0x{:x}", textSectionEnd);

  return 0;
}