name: Auto Build & Release Tailscale ACAP

on:
  schedule:
    - cron: "0 0 * * *"   # Every Monday at 03:00 UTC
  workflow_dispatch:

jobs:
  build-and-release:
    runs-on: ubuntu-latest
    steps:

    # 1. Checkout repo
    - uses: actions/checkout@v3
      with:
        persist-credentials: true
        fetch-depth: 0

    # 2. Get latest Tailscale version
    - name: Get latest Tailscale version
      id: tailscale_version
      run: |
        # 1. Start from GitHub latest
        GH_TAG=$(curl -s https://api.github.com/repos/tailscale/tailscale/releases/latest | jq -r .tag_name)
        GH_VERSION=${GH_TAG#v}

        echo "GitHub latest: $GH_VERSION"

        # 2. See if static ARM build exists for that version
        if curl -sfI "https://pkgs.tailscale.com/stable/tailscale_${GH_VERSION}_arm.tgz" > /dev/null; then
          VERSION="$GH_VERSION"
          echo "Using GitHub latest (has ARM package): $VERSION"
        else
          echo "No ARM package for $GH_VERSION, falling back to latest version on pkgs.tailscale.com"
          # 3. Derive latest version that actually has an ARM tarball
          VERSION=$(
            curl -s https://pkgs.tailscale.com/stable/ \
            | grep -o 'tailscale_[0-9.]*_arm\.tgz' \
            | sed -E 's/^tailscale_([0-9.]+)_arm\.tgz$/\1/' \
            | sort -V | tail -n1
          )
          echo "Fallback version: $VERSION"
        fi

        echo "RELEASE_VERSION=$VERSION" >> $GITHUB_ENV
        echo "version=$VERSION" >> $GITHUB_OUTPUT
    
    - name: Get current repo version
      id: current
      run: |
        CURRENT=$(find . -path "*/app/manifest.json" -exec jq -r '.acapPackageConf.setup.version' {} \; | sort -u | head -n1)
        echo "CURRENT_VERSION=$CURRENT" >> $GITHUB_ENV
        echo "Current repo version: $CURRENT"

    - name: Compare versions
      id: compare
      run: |
        echo "Repo version: $CURRENT_VERSION"
        echo "Latest Tailscale version: $RELEASE_VERSION"
        echo "Trigger: ${{ github.event_name }}"

        if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
          echo "build_needed=true" >> $GITHUB_ENV
          echo "Manual trigger — building regardless of version."
        elif [ "$CURRENT_VERSION" = "$RELEASE_VERSION" ]; then
          echo "build_needed=false" >> $GITHUB_ENV
          echo "Already up to date. Skipping build."
        else
          echo "build_needed=true" >> $GITHUB_ENV
          echo "New version detected. Will build."
        fi
          
    # 3. Download Tailscale binaries
    - name: Download Tailscale binaries
      if: env.build_needed == 'true'
      run: |
        mkdir -p tailscale_bins
        curl -L "https://pkgs.tailscale.com/stable/tailscale_${RELEASE_VERSION}_arm.tgz" -o tailscale_arm.tgz
        tar -xzf tailscale_arm.tgz -C tailscale_bins --strip-components=1
        mv tailscale_bins/tailscale tailscale_bins/tailscale_arm
        mv tailscale_bins/tailscaled tailscale_bins/tailscaled_arm

        curl -L "https://pkgs.tailscale.com/stable/tailscale_${RELEASE_VERSION}_arm64.tgz" -o tailscale_arm64.tgz
        tar -xzf tailscale_arm64.tgz -C tailscale_bins --strip-components=1
        mv tailscale_bins/tailscale tailscale_bins/tailscale_arm64
        mv tailscale_bins/tailscaled tailscale_bins/tailscaled_arm64

    # 4. Strip binaries to reduce package size
    - name: Strip binaries
      if: env.build_needed == 'true'
      run: |
        # Install cross-architecture strip tools
        sudo apt-get update
        sudo apt-get install -y binutils-aarch64-linux-gnu binutils-arm-linux-gnueabihf

        # Strip debug info and symbol tables (zero runtime/memory cost)
        aarch64-linux-gnu-strip -s tailscale_bins/tailscale_arm64
        aarch64-linux-gnu-strip -s tailscale_bins/tailscaled_arm64
        arm-linux-gnueabihf-strip -s tailscale_bins/tailscale_arm
        arm-linux-gnueabihf-strip -s tailscale_bins/tailscaled_arm

        ls -lh tailscale_bins/

    # 5. Build each folder, update manifest, and copy .eap files
    - name: Build all folders
      if: env.build_needed == 'true'
      run: |
        mkdir -p build
        rm -rf releases
        mkdir -p releases

        for folder in */ ; do
          [[ ! -d "$folder/app" ]] && continue
          FOLDER_NAME="${folder%/}"  # remove trailing slash
          echo "Processing folder $FOLDER_NAME"

          # Detect architecture
          if [[ "$FOLDER_NAME" == arm* ]]; then
            cp tailscale_bins/tailscale_arm "$folder/app/lib/tailscale"
            cp tailscale_bins/tailscaled_arm "$folder/app/lib/tailscaled"
          else
            cp tailscale_bins/tailscale_arm64 "$folder/app/lib/tailscale"
            cp tailscale_bins/tailscaled_arm64 "$folder/app/lib/tailscaled"
          fi

          # Detect variant suffix for .eap naming
          if [[ "$FOLDER_NAME" == *_ROOT ]]; then
            VARIANT="_root"
          elif [[ "$FOLDER_NAME" == *_acap3 ]]; then
            VARIANT="_acap3"
          else
            VARIANT=""
          fi

          # Update version — manifest.json for ACAP 4, package.conf for ACAP 3
          if [[ -f "$folder/app/manifest.json" ]]; then
            sed -i "s/\"version\": \".*\"/\"version\": \"${RELEASE_VERSION}\"/" "$folder/app/manifest.json"
          elif [[ -f "$folder/app/package.conf" ]]; then
            IFS='.' read -r MAJOR MINOR MICRO <<< "${RELEASE_VERSION}"
            sed -i "s/^APPMAJORVERSION=.*/APPMAJORVERSION=${MAJOR}/" "$folder/app/package.conf"
            sed -i "s/^APPMINORVERSION=.*/APPMINORVERSION=${MINOR}/" "$folder/app/package.conf"
            sed -i "s/^APPMICROVERSION=.*/APPMICROVERSION=${MICRO}/" "$folder/app/package.conf"
          fi

          # Docker build
          TAG_NAME=$(echo "$FOLDER_NAME" | tr '[:upper:]' '[:lower:]' | tr '/ ' '_')  # lowercase and clean
          echo "Building $TAG_NAME"
          docker build -f "$folder/Dockerfile" --tag "$TAG_NAME" "$folder"

          # Extract .eap files into build folder
          EAP_OUTPUT="./build/${TAG_NAME}"
          mkdir -p "$EAP_OUTPUT"
          CID=$(docker create "$TAG_NAME")
          docker cp "$CID":/opt/app "$EAP_OUTPUT"
          docker rm "$CID" >/dev/null

          # Move all .eap files to releases folder, append variant if needed
          find "$EAP_OUTPUT" -type f -name "*.eap" | while read eap; do
            BASENAME=$(basename "$eap" .eap)
            if [[ -n "$VARIANT" ]]; then
              mv "$eap" "releases/${BASENAME}${VARIANT}.eap"
            else
              mv "$eap" "releases/${BASENAME}.eap"
            fi
          done
        done

        # Clean up
        rm -rf build tailscale_bins *.tgz

    # 6. Commit updated manifests and .eap files directly to main
    - name: Commit updates to main
      if: env.build_needed == 'true'
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "github-actions[bot]@users.noreply.github.com"
        # Only commit manifests and ACAP 3 package.conf; do not track release artifacts
        git add */app/manifest.json arm_acap3/app/package.conf
        if git diff --cached --quiet; then
          echo "No changes to commit"
        else
          git commit -m "Update Tailscale to v${RELEASE_VERSION}"
          git push https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/Mo3he/Axis_Cam_Tailscale.git main
        fi

    # 7. Create GitHub Release with all new .eap files
    - name: Create GitHub Release
      if: env.build_needed == 'true'
      uses: softprops/action-gh-release@v1
      with:
        tag_name: v${{ env.RELEASE_VERSION }}
        name: "Tailscale VPN ${{ env.RELEASE_VERSION }}"
        files: releases/*
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}