name: Scheduled ArchISO Build

on:
  schedule:
    - cron: "0 0 1 * *" # Runs monthly on the 1st day of the month
  workflow_dispatch: # Allows manual triggers (multiple times a month)

jobs:
  build:
    runs-on: ubuntu-latest # Ensure this runner has archiso capabilities
    permissions:
      contents: write

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

      - name: Install archiso and dependencies
        run: |
          sudo pacman -Syu --noconfirm archiso

      - name: Build Arch ISO
        run: |
          # Replace 'releng' with your custom profile directory if needed
          sudo mkarchiso -v -w work -o out/ releng

      - name: Generate Unique Dynamic Tag
        id: tag
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          SERVER_URL: ${{ github.server_url }}
          REPOSITORY: ${{ github.repository }}
        run: |
          BASE_DATE=$(date -u +'%Y.%m.%d')
          REVISION=1
          TAG_NAME="iso-${BASE_DATE}-r${REVISION}"

          # Check if the tag already exists via Gitea API, increment revision loop if it does
          while curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token $GITEA_TOKEN" \
            "$SERVER_URL/api/v1/repos/$REPOSITORY/releases/tags/$TAG_NAME" | grep -q "200"; do
              REVISION=$((REVISION + 1))
              TAG_NAME="iso-${BASE_DATE}-r${REVISION}"
          done

          echo "tag_name=${TAG_NAME}" >> $GITHUB_OUTPUT
          echo "release_name=Arch Linux ISO (${BASE_DATE} Rev ${REVISION})" >> $GITHUB_OUTPUT

      - name: Create Release and Upload ISO
        uses: softprops/action-gh-release@v1
        with:
          tag_name: ${{ steps.tag.outputs.tag_name }}
          name: ${{ steps.tag.outputs.release_name }}
          files: out/*.iso
        env:
          GITHUB_TOKEN: ${{ secrets.GITEA_TOKEN }}

      - name: Keep only latest 3 releases
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
          SERVER_URL: ${{ github.server_url }}
          REPOSITORY: ${{ github.repository }}
        run: |
          # Fetch all releases
          releases=$(curl -s -H "Authorization: token $GITEA_TOKEN" \
            "$SERVER_URL/api/v1/repos/$REPOSITORY/releases")

          # Sort by creation date and delete old ones, keeping only the 3 newest releases
          echo "$releases" | jq -r 'sort_by(.created_at) | .[].id' | head -n -3 | while read -r id; do
            if [ -n "$id" ]; then
              echo "Deleting old release ID: $id"
              curl -s -X DELETE -H "Authorization: token $GITEA_TOKEN" \
                "$SERVER_URL/api/v1/repos/$REPOSITORY/releases/$id"
            fi
          done