name: Flatter

on:
  push:
    branches: [main, master]
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag_name:
        description: "TAG (empty to build from current branch)"
        required: false
        type: string
      build_branch:
        description: "Flatpak branch to build (stable/nightly)"
        required: true
        type: choice
        options:
          - stable
          - nightly
        default: "stable"

jobs:
  build-flatpak:
    name: Build Flatpak (${{ matrix.arch }})
    strategy:
      matrix:
        include:
          - arch: x86_64
            runner: ubuntu-latest
          - arch: aarch64
            runner: ubuntu-24.04-arm
      fail-fast: false
    runs-on: ${{ matrix.runner }}
    permissions:
      contents: read
    container:
      image: ghcr.io/andyholmes/flatter/freedesktop:25.08
      options: --privileged

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.tag_name || github.ref }}

      - name: Setup GPG
        id: gpg
        uses: crazy-max/ghaction-import-gpg@v7
        with:
          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
          passphrase: ${{ secrets.GPG_PASSPHRASE }}

      - name: Set Default Branch
        id: set_branch
        run: |
          if [ "${{ github.event_name }}" == "release" ]; then
            echo "branch=stable" >> $GITHUB_OUTPUT
          elif [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
            echo "branch=${{ inputs.build_branch }}" >> $GITHUB_OUTPUT
          else
            echo "branch=nightly" >> $GITHUB_OUTPUT
          fi

      - name: Modify Manifest
        run: |
          sed -i '/^branch:/d' packages/flatpak/ru.arabianq.pwsp.yaml
          sed -i '/^default-branch:/d' packages/flatpak/ru.arabianq.pwsp.yaml
          echo "branch: ${{ steps.set_branch.outputs.branch }}" >> packages/flatpak/ru.arabianq.pwsp.yaml
          echo "default-branch: ${{ steps.set_branch.outputs.branch }}" >> packages/flatpak/ru.arabianq.pwsp.yaml

      - name: Install SDK Extensions
        run: |
          flatpak install -y flathub org.freedesktop.Sdk.Extension.rust-stable//25.08
          flatpak install -y flathub org.freedesktop.Sdk.Extension.llvm20//25.08

      - name: Build Flatpak
        uses: andyholmes/flatter@main
        with:
          files: packages/flatpak/ru.arabianq.pwsp.yaml
          gpg-sign: ${{ steps.gpg.outputs.fingerprint }}
          upload-bundles: true
          upload-pages-artifact: false
          arch: ${{ matrix.arch }}
          cache: true

  prepare-repo:
    name: Prepare OSTree Repo
    needs: build-flatpak
    runs-on: ubuntu-latest
    concurrency: gh-pages-deploy
    container:
      image: ghcr.io/andyholmes/flatter/freedesktop:25.08
      options: --privileged
    permissions:
      contents: write # Needed to upload files to GitHub Release

    steps:
      - name: Download Flatpak Bundles
        uses: actions/download-artifact@v8
        with:
          path: bundles
          pattern: ru.arabianq.pwsp-*

      - name: Checkout existing gh-pages
        uses: actions/checkout@v4
        with:
          ref: gh-pages
          path: gh-pages-branch
        continue-on-error: true

      - name: Setup GPG
        id: gpg
        uses: crazy-max/ghaction-import-gpg@v7
        with:
          gpg_private_key: ${{ secrets.GPG_PRIVATE_KEY }}
          passphrase: ${{ secrets.GPG_PASSPHRASE }}

      - name: Update OSTree Repo and Prepare Release Bundles
        run: |
          mkdir -p release-bundles

          # Inherit existing OSTree repository to preserve previous branches (e.g. stable vs nightly)
          # Only inherit if objects/ exists, otherwise it's a corrupted/empty repo due to Git ignoring empty folders
          if [ -d "gh-pages-branch/objects" ]; then
            echo "Found existing OSTree repository. Copying..."
            cp -r gh-pages-branch pages-repo
            # Clean up the .git folder so it doesn't interfere
            rm -rf pages-repo/.git
          else
            echo "Initializing new OSTree repository..."
            mkdir -p pages-repo
            ostree init --mode=archive-z2 --repo=pages-repo
          fi

          shopt -s nullglob
          for dir in bundles/ru.arabianq.pwsp-*; do
            arch=$(basename "$dir" | sed 's/ru.arabianq.pwsp-//')

            # Find the flatpak file inside the dir
            bundle=$(find "$dir" -name "*.flatpak" | head -n 1)

            if [ -n "$bundle" ]; then
              echo "Importing $bundle for architecture $arch..."
              flatpak build-import-bundle pages-repo "$bundle"

              # Copy with a unique name for GitHub Release
              cp "$bundle" "release-bundles/ru.arabianq.pwsp-${arch}.flatpak"
            fi
          done

          # Update summary and sign the repository
          flatpak build-update-repo --generate-static-deltas --gpg-sign=${{ steps.gpg.outputs.fingerprint }} pages-repo

      - name: Deploy Flatpak Repo to GitHub Pages
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./pages-repo
          destination_dir: .
          keep_files: true

      - name: Upload bundles to GitHub Release
        if: github.event_name == 'release'
        uses: softprops/action-gh-release@v3
        with:
          files: release-bundles/*.flatpak
          tag_name: ${{ github.event.release.tag_name }}