name: Cross Build Windows Release on Linux

on:
  push:
    branches:
      - main
    tags:
      - 'v*'
  pull_request:
    branches:
      - main
  workflow_dispatch:

jobs:
  cross-build-windows:
    # 使用可访问 GitHub 的 Gitea act_runner（runner-mihomo），可直接拉取 actions/checkout、actions/upload-artifact 等 GitHub Action。
    runs-on: ubuntu-latest
    container:
      image: fedora:latest

    steps:
      - name: Prepare action runtime
        run: |
          set -euo pipefail
          sed -e 's|^metalink=|#metalink=|g' \
              -e 's|^#baseurl=http://download.example/pub/fedora/linux|baseurl=https://mirrors.tuna.tsinghua.edu.cn/fedora|g' \
              -i /etc/yum.repos.d/fedora*.repo
          if [ -f /etc/yum.repos.d/fedora-cisco-openh264.repo ]; then
            sed -i 's|^enabled=1|enabled=0|g' /etc/yum.repos.d/fedora-cisco-openh264.repo
          fi
          dnf makecache --refresh -y
          dnf install -y git nodejs

      - name: Checkout
        uses: actions/checkout@v4

      - name: Install cross build dependencies
        run: |
          set -euo pipefail
          dnf install -y \
            cmake \
            curl \
            ninja-build \
            p7zip \
            p7zip-plugins \
            mingw64-gcc-c++ \
            mingw64-qt6-qtbase \
            mingw64-opencv

      - name: Configure
        run: |
          set -euo pipefail
          cmake -S . -B build-windows-cross -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/toolchain-mingw64.cmake

      - name: Build
        run: |
          set -euo pipefail
          cmake --build build-windows-cross --parallel "$(nproc)"

      - name: Package
        run: |
          set -euo pipefail
          APP_NAME="chengnan"
          PACKAGE_NAME="chengnan-windows-x86_64-cross"
          PACKAGE_DIR="dist-windows-cross/${PACKAGE_NAME}"
          EXE="build-windows-cross/${APP_NAME}.exe"

          test -f "$EXE"
          rm -rf dist-windows-cross
          mkdir -p "$PACKAGE_DIR"
          cp "$EXE" "$PACKAGE_DIR/"

          # 收集 MinGW 运行时、Qt、OpenCV 依赖 DLL。
          for round in 1 2 3; do
            while IFS= read -r binary; do
              while IFS= read -r dll; do
                [ -f "$dll" ] || continue
                cp -n "$dll" "$PACKAGE_DIR/" || true
              done < <(x86_64-w64-mingw32-objdump -p "$binary" \
                | awk '/DLL Name:/ {print $3}' \
                | while read -r name; do \
                    find /usr/x86_64-w64-mingw32/sys-root/mingw/bin -iname "$name" -print -quit; \
                  done)
            done < <(find "$PACKAGE_DIR" -maxdepth 1 -type f \( -name '*.exe' -o -name '*.dll' \) | sort)
          done

          # Qt 平台插件是 Windows Qt GUI 程序启动所必需的。
          QT_PLUGIN_ROOT="/usr/x86_64-w64-mingw32/sys-root/mingw/lib/qt6/plugins"
          if [ -d "$QT_PLUGIN_ROOT/platforms" ]; then
            mkdir -p "$PACKAGE_DIR/platforms"
            cp -n "$QT_PLUGIN_ROOT/platforms"/*.dll "$PACKAGE_DIR/platforms/"
          fi

          cat > "$PACKAGE_DIR/README.txt" <<'EOF'
          chengnan Windows x86_64 交叉编译发布包

          运行方式：
          1. 解压整个目录。
          2. 双击 chengnan.exe 运行。

          说明：
          - 本目录由 Linux Runner 使用 MinGW-w64 交叉编译生成。
          - 请不要只复制 chengnan.exe，需保留同目录 DLL 和 platforms 子目录。
          EOF

          (cd dist-windows-cross && 7z a -tzip "${PACKAGE_NAME}.zip" "${PACKAGE_NAME}" >/dev/null)
          (cd dist-windows-cross && sha256sum "${PACKAGE_NAME}.zip" > "${PACKAGE_NAME}.zip.sha256")

          # 当前 Gitea 上传入口约 60 秒会返回 502；大文件按 15 MiB 分片上传。
          ZIP="dist-windows-cross/${PACKAGE_NAME}.zip"
          split -b 15M -d -a 3 "$ZIP" "${ZIP}.part-"
          (cd dist-windows-cross && sha256sum "${PACKAGE_NAME}.zip".part-* > "${PACKAGE_NAME}.zip.parts.sha256")
          du -h "$ZIP" "${ZIP}".part-*

      - name: Verify package
        run: |
          set -euo pipefail
          test -s dist-windows-cross/chengnan-windows-x86_64-cross.zip
          test -s dist-windows-cross/chengnan-windows-x86_64-cross.zip.part-000
          test -s dist-windows-cross/chengnan-windows-x86_64-cross.zip.parts.sha256
          (cd dist-windows-cross && sha256sum -c chengnan-windows-x86_64-cross.zip.sha256)
          (cd dist-windows-cross && sha256sum -c chengnan-windows-x86_64-cross.zip.parts.sha256)
          7z l dist-windows-cross/chengnan-windows-x86_64-cross.zip | grep 'chengnan.exe'
          7z l dist-windows-cross/chengnan-windows-x86_64-cross.zip | grep 'platforms/'
          python3 - <<'PY'
          from pathlib import Path
          limit = 20 * 1024 * 1024
          for part in Path('dist-windows-cross').glob('chengnan-windows-x86_64-cross.zip.part-*'):
              size = part.stat().st_size
              print(part.name, size)
              if size > limit:
                  raise SystemExit(f'{part} is too large for the current Gitea upload path')
          PY

      - name: Upload artifact
        uses: actions/upload-artifact@v3
        with:
          name: chengnan-windows-x86_64-cross
          path: |
            dist-windows-cross/chengnan-windows-x86_64-cross.zip
            dist-windows-cross/chengnan-windows-x86_64-cross.zip.sha256
            dist-windows-cross/chengnan-windows-x86_64-cross.zip.part-*
            dist-windows-cross/chengnan-windows-x86_64-cross.zip.parts.sha256
          if-no-files-found: error

      - name: Upload package to Gitea Packages
        if: ${{ github.event_name != 'pull_request' }}
        env:
          PACKAGE_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
        run: |
          set -euo pipefail
          PACKAGE_NAME="chengnan-windows-x86_64-cross"
          VERSION="${GITHUB_SHA:-manual}"
          VERSION="${VERSION:0:10}"
          OWNER="${GITHUB_REPOSITORY%%/*}"
          API_BASE="${GITHUB_SERVER_URL:-https://git.luochen570.cn}/api/packages/${OWNER}/generic/chengnan/${VERSION}"
          TOKEN="${PACKAGE_TOKEN:-${GITHUB_TOKEN:-}}"
          test -n "$TOKEN"
          upload_file() {
            local src="$1"
            local url="$2"
            local status
            status="$(curl --show-error --silent --location \
              --header "Authorization: token ${TOKEN}" \
              --upload-file "$src" \
              --write-out '%{http_code}' \
              --output /tmp/gitea-upload-response.txt \
              "$url")"
            if [ "$status" != "201" ] && [ "$status" != "200" ]; then
              echo "Upload failed with HTTP ${status}: ${url}" >&2
              cat /tmp/gitea-upload-response.txt >&2
              exit 1
            fi
          }
          for part in dist-windows-cross/${PACKAGE_NAME}.zip.part-*; do
            upload_file "$part" "${API_BASE}/$(basename "$part")"
          done
          upload_file "dist-windows-cross/${PACKAGE_NAME}.zip.sha256" "${API_BASE}/${PACKAGE_NAME}.zip.sha256"
          upload_file "dist-windows-cross/${PACKAGE_NAME}.zip.parts.sha256" "${API_BASE}/${PACKAGE_NAME}.zip.parts.sha256"
          echo "Package uploaded to: ${API_BASE}/"
          echo "Download all ${PACKAGE_NAME}.zip.part-* files, then reconstruct with: cat ${PACKAGE_NAME}.zip.part-* > ${PACKAGE_NAME}.zip"