name: Release
on:
  push:
    branches: [main]

jobs:
  release:
    runs-on: ubuntu-builder
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      # ── 自动标签：从合并进来的 PR body 提取 v*.*.* ──
      - name: Auto-tag from merged PR
        id: autotag
        run: |
          set -e

          # 已有标签 → 跳过
          EXISTING=$(git tag --points-at HEAD | grep '^v' | head -n1)
          if [ -n "$EXISTING" ]; then
            echo "Tag $EXISTING already exists"
            echo "tag=$EXISTING" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          # 非 merge commit → 跳过（直接 push 不处理）
          PARENTS=$(git log --format="%P" -1 | wc -w)
          if [ "$PARENTS" -lt 2 ]; then
            echo "Not a merge commit, skip auto-tag"
            exit 0
          fi

          # 从 merge commit message 提取 PR 号
          COMMIT_MSG=$(git log --format="%B" -1)
          PR_NUM=$(echo "$COMMIT_MSG" | grep -oP '#\K\d+' | head -1)
          if [ -z "$PR_NUM" ]; then
            echo "No PR number found in merge message"
            exit 0
          fi
          echo "Merge commit for PR #$PR_NUM"

          # 通过 Gitea API 获取 PR body，提取版本号
          API="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/pulls/${PR_NUM}"
          TOKEN="${{ gitea.token }}"
          PR_BODY=$(curl -s -H "Authorization: token ${TOKEN}" "${API}" | \
            python3 -c "import sys,json,re;pr=json.load(sys.stdin);body=pr.get('body','') or '';m=re.search(r'v\d+\.\d+\.\d+',body);print(m.group() if m else '')")

          if [ -z "$PR_BODY" ]; then
            echo "No version pattern v*.*.* found in PR body"
            exit 0
          fi

          VERSION="$PR_BODY"
          echo "Found version: $VERSION"

          # 创建本地标签
          git config user.email "ci@datarouter"
          git config user.name "DataRouter CI"
          git tag -a "$VERSION" -m "Release $VERSION"
          echo "Created local tag: $VERSION"

          # 推送到远端（不会触发本 workflow — 仅匹配 branches: [main]）
          ORIGIN=$(git config --get remote.origin.url)
          PUSH_URL="https://oauth2:${TOKEN}@${ORIGIN#https://}"
          git push "$PUSH_URL" "$VERSION"
          echo "Pushed tag: $VERSION"
          echo "tag=$VERSION" >> "$GITHUB_OUTPUT"

      # ── 读取标签（已有标签 / auto-tag 创建的标签）──
      - name: Read tag from HEAD
        id: tag
        run: |
          TAG=$(git tag --points-at HEAD | grep '^v' | head -n1)
          [ -n "$TAG" ] || { echo "No version tag on HEAD"; exit 78; }
          echo "tag=$TAG" >> "$GITHUB_OUTPUT"

      - name: Install cross-compilers
        run: |
          sudo apt-get update
          sudo apt-get install -y \
            gcc-arm-linux-gnueabihf \
            gcc-aarch64-linux-gnu \
            gcc-mingw-w64-x86-64 \
            gcc-arm-none-eabi

      - name: Build all targets
        run: |
          for entry in \
            "linux-amd64|ON|" \
            "linux-arm64|OFF|-DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-linux-arm64.cmake" \
            "linux-armhf|OFF|-DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-linux-armhf.cmake" \
            "windows-amd64|OFF|-DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-windows-amd64.cmake -DBUILD_EXAMPLES=OFF" \
            "baremetal-arm32|OFF|-DCMAKE_TOOLCHAIN_FILE=cmake/toolchain-baremetal-arm32.cmake -DBUILD_EXAMPLES=OFF -DBUILD_SHARED=OFF"
          do
            IFS='|' read -r name testing extra <<< "$entry"
            echo ">>> Building $name"
            cmake -S . -B "build-$name" -DBUILD_TESTING=$testing $extra
            cmake --build "build-$name"
            [ "$testing" = "ON" ] && ctest --test-dir "build-$name" --output-on-failure

            pkg="datarouter-$name"
            cmake --install "build-$name" --prefix "dist/$pkg"
          done

      - name: Cortex-M compile matrix
        run: |
          cmake -S . -B build-cortex-m -DDR_COMPILE_CHECK=ON
          cmake --build build-cortex-m --parallel $(nproc)
          echo "--- Cortex-M build matrix: all variants passed ---"

      - name: Create release & upload assets
        run: |
          TAG="${{ steps.tag.outputs.tag }}"
          API="${{ gitea.server_url }}/api/v1/repos/${{ gitea.repository }}/releases"
          TOKEN="${{ gitea.token }}"

          # Check if release already exists
          echo "=== Checking existing releases for $TAG ==="
          EXISTING=$(curl -s -H "Authorization: token ${TOKEN}" "${API}" | \
            python3 -c "import sys,json;rels=json.load(sys.stdin);print(next((r['id'] for r in rels if r['tag_name']=='${TAG}'),''))")

          if [ -n "$EXISTING" ]; then
            ID="$EXISTING"
            echo "Release already exists (ID=$ID), updating it"
          else
            echo "=== Creating release $TAG ==="
            RESP=$(curl -s -X POST \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/json" \
              -d "{\"tag_name\":\"${TAG}\",\"name\":\"DataRouter ${TAG}\"}" \
              "$API")
            ID=$(echo "$RESP" | python3 -c "import sys,json;d=json.loads(sys.stdin.read());print(d['id'])")
          fi

          for dir in dist/*/; do
            name="$(basename "$dir").tar.gz"
            tar czf "/tmp/$name" -C "$dir" .
            echo "Uploading $name"
            curl -s -X POST \
              -H "Authorization: token ${TOKEN}" \
              -H "Content-Type: application/octet-stream" \
              --data-binary @"/tmp/$name" \
              "${API}/${ID}/assets?name=${name}"
          done