name: Build TDLib

on:
  workflow_dispatch:
    inputs:
      tdlib_ref:
        description: Optional TDLib tag or commit to build
        required: false
        type: string
  schedule:
    - cron: "0 3 * * 1"

permissions:
  contents: read
  packages: write

jobs:
  build-tdlib:
    runs-on: ubuntu-latest
    env:
      PACKAGE_NAME: tdlib
      TDLIB_REPO: https://github.com/tdlib/td.git
    steps:
      - name: Check out repository
        uses: https://github.com/actions/checkout@v4

      - name: Install build dependencies
        run: |
          if command -v sudo >/dev/null 2>&1; then
            SUDO=sudo
          else
            SUDO=
          fi

          $SUDO apt-get update
          $SUDO apt-get install -y \
            build-essential \
            ca-certificates \
            cmake \
            curl \
            git \
            gperf \
            libssl-dev \
            pkg-config \
            zlib1g-dev

      - name: Resolve TDLib ref
        id: tdlib
        run: |
          set -euo pipefail
          ref="${{ inputs.tdlib_ref }}"
          if [ -z "$ref" ]; then
            ref="$(git ls-remote --tags --refs --sort='version:refname' "$TDLIB_REPO" 'v*' | tail -n1 | awk -F/ '{print $3}')"
          fi
          if [ -z "$ref" ]; then
            echo "Failed to resolve TDLib ref" >&2
            exit 1
          fi

          version="$ref"
          version="${version#v}"
          archive="tdlib-${version}-linux-x86_64.tar.gz"

          {
            echo "ref=$ref"
            echo "version=$version"
            echo "archive=$archive"
          } >> "$GITHUB_OUTPUT"

      - name: Build TDLib bundle
        run: |
          set -euo pipefail
          ref="${{ steps.tdlib.outputs.ref }}"
          version="${{ steps.tdlib.outputs.version }}"
          archive="${{ steps.tdlib.outputs.archive }}"

          rm -rf tdlib-src tdlib-build dist
          git clone --depth 1 --branch "$ref" "$TDLIB_REPO" tdlib-src

          cmake -S tdlib-src -B tdlib-build \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_INSTALL_PREFIX="$PWD/dist/tdlib" \
            -DTD_ENABLE_INSTALL=ON \
            -DTD_ENABLE_JNI=OFF \
            -DTD_ENABLE_DOTNET=OFF \
            -DTD_ENABLE_TESTS=OFF \
            -DTD_ENABLE_BENCHMARKS=OFF
          cmake --build tdlib-build -j"$(nproc)"
          cmake --install tdlib-build

          tar -C dist -czf "$archive" tdlib
          sha256sum "$archive" > "${archive}.sha256"

      - name: Publish TDLib package
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          set -euo pipefail
          version="${{ steps.tdlib.outputs.version }}"
          archive="${{ steps.tdlib.outputs.archive }}"
          base="${{ gitea.server_url }}/api/packages/${{ gitea.repository_owner }}/generic/${PACKAGE_NAME}"

          status="$(curl --silent --show-error \
            --output /dev/null \
            --write-out "%{http_code}" \
            --user "${{ gitea.actor }}:${GITEA_TOKEN}" \
            -X DELETE \
            "$base/$version")"
          case "$status" in
            204|404) ;;
            *)
              echo "Unexpected response deleting existing package version: $status" >&2
              exit 1
              ;;
          esac

          curl --fail-with-body \
            --user "${{ gitea.actor }}:${GITEA_TOKEN}" \
            --upload-file "$archive" \
            "$base/$version/$archive"

          curl --fail-with-body \
            --user "${{ gitea.actor }}:${GITEA_TOKEN}" \
            --upload-file "${archive}.sha256" \
            "$base/$version/${archive}.sha256"

      - name: Publish latest metadata
        env:
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          set -euo pipefail
          version="${{ steps.tdlib.outputs.version }}"
          archive="${{ steps.tdlib.outputs.archive }}"
          base="${{ gitea.server_url }}/api/packages/${{ gitea.repository_owner }}/generic/${PACKAGE_NAME}"
          latest_manifest="tdlib-latest.json"

          cat > "$latest_manifest" <<EOF
          {
            "ref": "${{ steps.tdlib.outputs.ref }}",
            "version": "$version",
            "archive": "$archive",
            "url": "$base/$version/$archive",
            "sha256_url": "$base/$version/${archive}.sha256"
          }
          EOF

          status="$(curl --silent --show-error \
            --output /dev/null \
            --write-out "%{http_code}" \
            --user "${{ gitea.actor }}:${GITEA_TOKEN}" \
            -X DELETE \
            "$base/latest")"
          case "$status" in
            204|404) ;;
            *)
              echo "Unexpected response deleting latest package version: $status" >&2
              exit 1
              ;;
          esac

          curl --fail-with-body \
            --user "${{ gitea.actor }}:${GITEA_TOKEN}" \
            --upload-file "$latest_manifest" \
            "$base/latest/$latest_manifest"