const fs = require("fs");
const path = require("path");
const { withDangerousMod, createRunOncePlugin } = require("@expo/config-plugins");

const PATCH_MARKER = "Applied fmt consteval workaround in fmt/base.h";

const PATCH_BLOCK = [
  "    # Workaround for Xcode/clang consteval regression with fmt 11.0.2.",
  "    # Keep this until React Native ships a newer fmt pod.",
  "    fmt_base_header = File.join(installer.sandbox.root.to_s, 'fmt', 'include', 'fmt', 'base.h')",
  "    if File.exist?(fmt_base_header)",
  "      content = File.read(fmt_base_header)",
  "      old_line = '      detail::parse_format_string<true>(str_, checker(s));'",
  "      new_line = '      detail::parse_format_string<true>(str_, checker(str_));'",
  "      if content.include?(old_line)",
  "        File.chmod(0o644, fmt_base_header) unless File.writable?(fmt_base_header)",
  "        File.write(fmt_base_header, content.sub(old_line, new_line))",
  `        Pod::UI.puts('${PATCH_MARKER}')`,
  "      end",
  "    end",
].join("\n");

function applyFmtPatchToPodfile(contents) {
  if (contents.includes(PATCH_MARKER)) {
    return contents;
  }

  const primaryAnchor =
    "    # This is necessary for Xcode 14, because it signs resource bundles by default";
  if (contents.includes(primaryAnchor)) {
    return contents.replace(primaryAnchor, `${PATCH_BLOCK}\n\n${primaryAnchor}`);
  }

  const fallbackAnchor = "    installer.target_installation_results.pod_target_installation_results";
  if (contents.includes(fallbackAnchor)) {
    return contents.replace(fallbackAnchor, `${PATCH_BLOCK}\n\n${fallbackAnchor}`);
  }

  throw new Error(
    "withFmtConstevalWorkaround: could not find insertion anchor in ios/Podfile."
  );
}

const withFmtConstevalWorkaround = (config) =>
  withDangerousMod(config, [
    "ios",
    async (config) => {
      const podfilePath = path.join(config.modRequest.platformProjectRoot, "Podfile");
      if (!fs.existsSync(podfilePath)) {
        return config;
      }

      const podfile = fs.readFileSync(podfilePath, "utf8");
      const patched = applyFmtPatchToPodfile(podfile);
      if (patched !== podfile) {
        fs.writeFileSync(podfilePath, patched);
      }

      return config;
    },
  ]);

module.exports = createRunOncePlugin(
  withFmtConstevalWorkaround,
  "with-fmt-consteval-workaround",
  "1.0.0"
);