require "json"

package = JSON.parse(File.read(File.join(__dir__, "package.json")))

Pod::UI.puts "[QuickCrypto]  💨 crypto just got quicker"

Pod::Spec.new do |s|
  s.name         = "QuickCrypto"
  s.version      = package["version"]
  s.summary      = package["description"]
  s.homepage     = package["homepage"]
  s.license      = package["license"]
  s.authors      = package["authors"]

  s.ios.deployment_target = min_ios_version_supported
  s.visionos.deployment_target = 1.0
  s.macos.deployment_target = 10.13
  s.tvos.deployment_target = 13.4

  s.source = { :git => "https://github.com/margelo/react-native-quick-crypto.git", :tag => "#{s.version}" }

  sodium_enabled = ENV['SODIUM_ENABLED'] == '1'
  Pod::UI.puts("[QuickCrypto]  🧂 has libsodium #{sodium_enabled ? "enabled" : "disabled"}!")

  # Ensure libsodium source is present during podspec evaluation when enabled.
  # This is necessary because prepare_command is skipped for :path pods.
  if sodium_enabled
    sodium_version = "1.0.22"
    sodium_dir = File.join(__dir__, "ios", "libsodium-stable")
    sodium_header = File.join(sodium_dir, "src", "libsodium", "include", "sodium.h")
    unless File.exist?(sodium_header)
      FileUtils.mkdir_p(File.join(__dir__, "ios"))
      FileUtils.rm_rf(sodium_dir) if File.directory?(sodium_dir)

      Pod::UI.puts "[QuickCrypto] ⬇️  Downloading libsodium source..."
      Dir.chdir(__dir__) do
        system("curl -sSfL --connect-timeout 30 --max-time 300 -o ios/libsodium.tar.gz https://download.libsodium.org/libsodium/releases/libsodium-#{sodium_version}-stable.tar.gz") || raise("Failed to download libsodium")
        system("tar -xzf ios/libsodium.tar.gz -C ios") || raise("Failed to extract libsodium")
        File.delete("ios/libsodium.tar.gz") if File.exist?("ios/libsodium.tar.gz")
      end
      Pod::UI.puts "[QuickCrypto] ✅ libsodium source downloaded successfully"
    end
  end

  if sodium_enabled
    # Build libsodium from source for XSalsa20 cipher support
    # CocoaPods packages are outdated (1.0.12) and SPM causes module conflicts
    s.prepare_command = <<-CMD
      set -e
      # Clean up vendored OpenSSL.xcframework from pre-1.0.20 installs
      rm -rf OpenSSL.xcframework
      rm -f OpenSSL.xcframework.zip
      # Build libsodium
      mkdir -p ios
      curl -L -o ios/libsodium.tar.gz https://download.libsodium.org/libsodium/releases/libsodium-1.0.22-stable.tar.gz
      tar -xzf ios/libsodium.tar.gz -C ios
      cd ios/libsodium-stable
      ./configure --disable-shared --enable-static
      make -j$(sysctl -n hw.ncpu)
      cd ../../
      rm -f ios/libsodium.tar.gz
    CMD
  else
    s.prepare_command = <<-CMD
      set -e
      # Clean up libsodium if previously built
      rm -rf ios/libsodium-stable
      rm -f ios/libsodium.tar.gz
      # Clean up vendored OpenSSL.xcframework from pre-1.0.20 installs
      rm -rf OpenSSL.xcframework
      rm -f OpenSSL.xcframework.zip
    CMD
  end

  base_source_files = [
    # implementation (Swift)
    "ios/**/*.{swift}",
    # ios (Objective-C++)
    "ios/**/*.{h,m,mm}",
    # implementation (C++)
    "cpp/**/*.{hpp,cpp}",
    # dependencies (C++) - ncrypto
    "deps/ncrypto/include/**/*.{h}",
    "deps/ncrypto/src/*.{cpp}",
    # dependencies (C++) - simdutf
    "deps/simdutf/include/**/*.{h}",
    "deps/simdutf/src/simdutf.cpp",
    # dependencies (C) - exclude BLAKE3 x86 SIMD files (only use portable + NEON for ARM)
    "deps/blake3/c/*.{h,c}",
    "deps/fastpbkdf2/*.{h,c}",
  ]

  # Exclude BLAKE3 x86-specific SIMD implementations (SSE2, SSE4.1, AVX2, AVX-512)
  # These use Intel intrinsics that don't compile on ARM
  # Also exclude example files, TBB files, test files, and non-C directories
  s.exclude_files = [
    "deps/blake3/c/blake3_sse2.c",
    "deps/blake3/c/blake3_sse41.c",
    "deps/blake3/c/blake3_avx2.c",
    "deps/blake3/c/blake3_avx512.c",
    "deps/blake3/c/blake3_sse2_x86-64_unix.S",
    "deps/blake3/c/blake3_sse41_x86-64_unix.S",
    "deps/blake3/c/blake3_avx2_x86-64_unix.S",
    "deps/blake3/c/blake3_avx512_x86-64_unix.S",
    "deps/blake3/c/blake3_sse2_x86-64_windows_gnu.S",
    "deps/blake3/c/blake3_sse41_x86-64_windows_gnu.S",
    "deps/blake3/c/blake3_avx2_x86-64_windows_gnu.S",
    "deps/blake3/c/blake3_avx512_x86-64_windows_gnu.S",
    "deps/blake3/c/blake3_sse2_x86-64_windows_msvc.asm",
    "deps/blake3/c/blake3_sse41_x86-64_windows_msvc.asm",
    "deps/blake3/c/blake3_avx2_x86-64_windows_msvc.asm",
    "deps/blake3/c/blake3_avx512_x86-64_windows_msvc.asm",
    "deps/blake3/c/main.c",
    "deps/blake3/c/example.c",
    "deps/blake3/c/example_tbb.c",
    "deps/blake3/c/blake3_tbb.cpp",
    # Exclude ncrypto version.h to avoid header name collision with libsodium's version.h
    # (ncrypto.h includes it via relative path "ncrypto/version.h" which still resolves)
    "deps/ncrypto/include/ncrypto/version.h",
    # Exclude non-C parts of BLAKE3 repo (Rust, benchmarks, tools, etc.)
    "deps/blake3/src/**/*",
    "deps/blake3/b3sum/**/*",
    "deps/blake3/benches/**/*",
    "deps/blake3/reference_impl/**/*",
    "deps/blake3/tools/**/*",
    "deps/blake3/test_vectors/**/*",
  ]

  if sodium_enabled
    base_source_files += ["ios/libsodium-stable/src/libsodium/**/*.{h,c}"]
  end

  s.source_files = base_source_files

  xcconfig = {
    # C++ compiler flags, mainly for folly.
    "GCC_PREPROCESSOR_DEFINITIONS" => "$(inherited) FOLLY_NO_CONFIG FOLLY_CFG_NO_COROUTINES",
    # Set C++ standard to C++20
    "CLANG_CXX_LANGUAGE_STANDARD" => "c++20",
    "CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES" => "YES",
    # Exclude ARM NEON source when building x86_64 simulator (no NEON support).
    "EXCLUDED_SOURCE_FILE_NAMES[sdk=iphonesimulator*][arch=x86_64]" => "deps/blake3/c/blake3_neon.c",
    # Disable x86 SIMD intrinsics on iOS simulator — the .c implementation files are already
    # excluded above, but blake3_dispatch.c still references the symbols unless these macros
    # are defined. Mirrors the Android CMakeLists.txt approach (line 18-22).
    "GCC_PREPROCESSOR_DEFINITIONS[sdk=iphonesimulator*][arch=x86_64]" => "$(inherited) BLAKE3_NO_AVX512 BLAKE3_NO_AVX2 BLAKE3_NO_SSE41 BLAKE3_NO_SSE2"
  }

  # Add cpp subdirectories to header search paths
  cpp_headers = [
    "\"$(PODS_TARGET_SRCROOT)/cpp/utils\"",
    "\"$(PODS_TARGET_SRCROOT)/cpp/hkdf\"",
    "\"$(PODS_TARGET_SRCROOT)/cpp/dh\"",
    "\"$(PODS_TARGET_SRCROOT)/cpp/ecdh\"",
    "\"$(PODS_TARGET_SRCROOT)/cpp/turboshake\"",
    "\"$(PODS_TARGET_SRCROOT)/nitrogen/generated/shared/c++\"",
    "\"$(PODS_TARGET_SRCROOT)/deps/ncrypto/include\"",
    "\"$(PODS_TARGET_SRCROOT)/deps/simdutf/include\"",
    "\"$(PODS_TARGET_SRCROOT)/deps/simdutf/src\"",
    "\"$(PODS_TARGET_SRCROOT)/deps/blake3/c\"",
    "\"$(PODS_TARGET_SRCROOT)/deps/fastpbkdf2\""
  ]

  if sodium_enabled
    # Use absolute path from __dir__ which resolves symlinks correctly.
    # This is necessary in monorepo setups where the podspec is accessed via symlink
    # but the source files are resolved to their real paths during compilation.
    real_sodium_include = File.join(__dir__, "ios", "libsodium-stable", "src", "libsodium", "include")
    sodium_headers = [
      "\"$(PODS_TARGET_SRCROOT)/ios/libsodium-stable/src/libsodium/include\"",
      "\"$(PODS_TARGET_SRCROOT)/ios/libsodium-stable/src/libsodium/include/sodium\"",
      "\"#{real_sodium_include}\"",
      "\"#{real_sodium_include}/sodium\""
    ]
    xcconfig["HEADER_SEARCH_PATHS"] = (cpp_headers + sodium_headers).join(' ')
    xcconfig["GCC_PREPROCESSOR_DEFINITIONS"] = "$(inherited) FOLLY_NO_CONFIG FOLLY_CFG_NO_COROUTINES BLSALLOC_SODIUM=1"
  else
    xcconfig["HEADER_SEARCH_PATHS"] = cpp_headers.join(' ')
  end

  s.pod_target_xcconfig = xcconfig

  # Add all files generated by Nitrogen
  load "nitrogen/generated/ios/QuickCrypto+autolinking.rb"
  add_nitrogen_files(s)

  s.dependency "OpenSSL-Universal", "~> 3.6.2000"
  s.dependency "React-jsi"
  s.dependency "React-callinvoker"

  install_modules_dependencies(s)
end