#!/bin/bash
# 交叉编译 mosh(blinksh/ios 分支) + protobuf-lite → MoshCore.xcframework（iOS device/simulator/macOS）。
# crypto 后端 = Apple CommonCrypto（系统内建）；特性宏由 build/mosh/config.h 手写提供（绕过 autotools）。
# 产出 library-only xcframework（头文件与 modulemap 由包内 C target 提供，避免 modulemap 撞车，同 CSSHCore 教训）。
set -euo pipefail

BUILD="$(cd "$(dirname "$0")" && pwd)"          # vendor/build
VENDOR="$(cd "$BUILD/.." && pwd)"               # vendor
MOSH_SRC="$VENDOR/mosh/src"
PROTOBUF="$VENDOR/protobuf"
PROTOBUF_SRC="$PROTOBUF/src"
MOSH_CMAKE="$BUILD/mosh"
OUT="$BUILD/mosh-out"
ARTIFACTS="$VENDOR/../artifacts"
IOS_DEPLOY=17.0
MAC_DEPLOY=14.0

build_slice() {
  local name="$1" sysname="$2" sysroot="$3" archs="$4" deploy="$5"
  echo "==================== slice: $name ($archs @ $sysroot) ===================="
  rm -rf "$OUT/$name"; mkdir -p "$OUT/$name"

  local common=(
    -G Ninja
    -DCMAKE_BUILD_TYPE=Release
    -DCMAKE_SYSTEM_NAME="$sysname"
    -DCMAKE_OSX_SYSROOT="$sysroot"
    -DCMAKE_OSX_ARCHITECTURES="$archs"
    -DCMAKE_OSX_DEPLOYMENT_TARGET="$deploy"
  )

  # --- protobuf-lite（仅 lite runtime；mosh 的 .proto 是 proto2 + LITE_RUNTIME） ---
  cmake -S "$PROTOBUF" -B "$OUT/$name/protobuf" "${common[@]}" \
    -Dprotobuf_BUILD_TESTS=OFF \
    -Dprotobuf_BUILD_PROTOC_BINARIES=OFF \
    -Dprotobuf_BUILD_LIBPROTOC=OFF \
    -Dprotobuf_BUILD_SHARED_LIBS=OFF \
    -DCMAKE_CXX_STANDARD=14
  cmake --build "$OUT/$name/protobuf" --target libprotobuf-lite -j8

  # --- moshios（我们的 CMakeLists，编 src/*.cc） ---
  cmake -S "$MOSH_CMAKE" -B "$OUT/$name/mosh" "${common[@]}" \
    -DMOSH_SRC="$MOSH_SRC" \
    -DPROTOBUF_SRC="$PROTOBUF_SRC"
  cmake --build "$OUT/$name/mosh" -j8

  # --- 合并静态库 → 单一 libMoshCore.a ---
  libtool -static -o "$OUT/$name/libMoshCore.a" \
    "$OUT/$name/mosh/libmoshios.a" \
    "$OUT/$name/protobuf/libprotobuf-lite.a"
  echo "[+] $name → $(lipo -archs "$OUT/$name/libMoshCore.a")"
}

pack_xcframework() {
  echo "==================== packing MoshCore.xcframework (library-only) ===================="
  rm -rf "$ARTIFACTS/MoshCore.xcframework"; mkdir -p "$ARTIFACTS"
  local args=()
  for s in "$@"; do
    args+=(-library "$OUT/$s/libMoshCore.a")
  done
  xcodebuild -create-xcframework "${args[@]}" -output "$ARTIFACTS/MoshCore.xcframework"
  echo "[+] MoshCore.xcframework:"; ls "$ARTIFACTS/MoshCore.xcframework"
}

case "${1:-all}" in
  iossim) build_slice iossim    iOS    iphonesimulator "arm64;x86_64" "$IOS_DEPLOY" ;;
  device) build_slice ios-arm64 iOS    iphoneos        "arm64"        "$IOS_DEPLOY" ;;
  macos)  build_slice macos     Darwin macosx          "arm64"        "$MAC_DEPLOY" ;;
  all)
    build_slice iossim    iOS    iphonesimulator "arm64;x86_64" "$IOS_DEPLOY"
    build_slice ios-arm64 iOS    iphoneos        "arm64"        "$IOS_DEPLOY"
    build_slice macos     Darwin macosx          "arm64"        "$MAC_DEPLOY"
    pack_xcframework iossim ios-arm64 macos
    ;;
  pack) shift; pack_xcframework "$@" ;;
esac