name: Create Release on Tag

on:
  push:
    tags:
      - "Release_*"

permissions:
  contents: write

jobs:
  # First run tests
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: "1.23"
      - name: Checkout obitools4 project
        uses: actions/checkout@v4
      - name: Run tests
        run: make githubtests

  # Build binaries for each platform
  build:
    needs: test
    strategy:
      matrix:
        include:
          - os: ubuntu-latest
            goos: linux
            goarch: amd64
            output_name: linux_amd64
          - os: ubuntu-latest
            goos: linux
            goarch: arm64
            output_name: linux_arm64
            cross_compile: true
          - os: macos-latest
            goos: darwin
            goarch: amd64
            output_name: darwin_amd64
          - os: macos-latest
            goos: darwin
            goarch: arm64
            output_name: darwin_arm64

    runs-on: ${{ matrix.os }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v5
        with:
          go-version: "1.23"

      - name: Extract version from tag
        id: get_version
        run: |
          TAG=${GITHUB_REF#refs/tags/Release_}
          echo "version=$TAG" >> $GITHUB_OUTPUT

      - name: Install cross-compilation tools (Linux ARM64 only)
        if: matrix.cross_compile
        run: |
          sudo apt-get update
          sudo apt-get install -y gcc-aarch64-linux-gnu

      - name: Build binaries
        env:
          GOOS: ${{ matrix.goos }}
          GOARCH: ${{ matrix.goarch }}
          CC: ${{ matrix.cross_compile && 'aarch64-linux-gnu-gcc' || '' }}
          VERSION: ${{ steps.get_version.outputs.version }}
        run: |
          make obitools
          mkdir -p artifacts
          cd build
          for binary in *; do
            tar -czf ../artifacts/${binary}_${VERSION}_${{ matrix.output_name }}.tar.gz ${binary}
          done

      - name: Upload artifacts
        uses: actions/upload-artifact@v4
        with:
          name: binaries-${{ matrix.output_name }}
          path: artifacts/*

  # Create the release
  create-release:
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Extract version from tag
        id: get_version
        run: |
          TAG=${GITHUB_REF#refs/tags/Release_}
          echo "version=$TAG" >> $GITHUB_OUTPUT

      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: release-artifacts

      - name: Prepare release directory
        run: |
          mkdir -p release
          find release-artifacts -type f -name "*.tar.gz" -exec cp {} release/ \;
          ls -lh release/

      - name: Generate Release Notes
        env:
          VERSION: ${{ steps.get_version.outputs.version }}
        run: |
          PREV_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")

          echo "# OBITools4 Release ${VERSION}" > release_notes.md
          echo "" >> release_notes.md

          if [ -n "$PREV_TAG" ]; then
            echo "## Changes since ${PREV_TAG}" >> release_notes.md
            echo "" >> release_notes.md
            git log ${PREV_TAG}..HEAD --pretty=format:"- %s" >> release_notes.md
          else
            echo "## Changes" >> release_notes.md
            echo "" >> release_notes.md
            git log --pretty=format:"- %s" -n 20 >> release_notes.md
          fi

          echo "" >> release_notes.md
          echo "" >> release_notes.md
          echo "## Installation" >> release_notes.md
          echo "" >> release_notes.md
          echo "Download the appropriate binary for your system and extract it:" >> release_notes.md
          echo "" >> release_notes.md
          echo "### Linux (AMD64)" >> release_notes.md
          echo '```bash' >> release_notes.md
          echo "tar -xzf <tool>_${VERSION}_linux_amd64.tar.gz" >> release_notes.md
          echo '```' >> release_notes.md
          echo "" >> release_notes.md
          echo "### Linux (ARM64)" >> release_notes.md
          echo '```bash' >> release_notes.md
          echo "tar -xzf <tool>_${VERSION}_linux_arm64.tar.gz" >> release_notes.md
          echo '```' >> release_notes.md
          echo "" >> release_notes.md
          echo "### macOS (Intel)" >> release_notes.md
          echo '```bash' >> release_notes.md
          echo "tar -xzf <tool>_${VERSION}_darwin_amd64.tar.gz" >> release_notes.md
          echo '```' >> release_notes.md
          echo "" >> release_notes.md
          echo "### macOS (Apple Silicon)" >> release_notes.md
          echo '```bash' >> release_notes.md
          echo "tar -xzf <tool>_${VERSION}_darwin_arm64.tar.gz" >> release_notes.md
          echo '```' >> release_notes.md
          echo "" >> release_notes.md
          echo "Available tools: Replace \`<tool>\` with one of the obitools commands." >> release_notes.md

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v1
        with:
          name: Release ${{ steps.get_version.outputs.version }}
          body_path: release_notes.md
          files: release/*
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}