name: CI

on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ghcr.io/sulfurnitride/fluorine-builder

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      packages: write

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

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Pull or build Docker image
        run: |
          if docker pull ${{ env.IMAGE_NAME }}:latest; then
            docker tag ${{ env.IMAGE_NAME }}:latest fluorine-builder:latest
          else
            echo "Pull failed, building from scratch..."
            docker build -t fluorine-builder:latest docker/
          fi

      - name: Restore ccache
        uses: actions/cache@v4
        with:
          path: ~/.cache/fluorine-ccache
          key: ccache-${{ runner.os }}-${{ github.sha }}
          restore-keys: |
            ccache-${{ runner.os }}-

      - name: Build inside container
        run: |
          mkdir -p ~/.cache/fluorine-ccache
          docker run --rm \
            -v "${{ github.workspace }}:/src:rw" \
            -v "$HOME/.cache/fluorine-ccache:/ccache:rw" \
            -e CCACHE_DIR=/ccache \
            -e BUILD_MODE=tarball \
            -w /src \
            fluorine-builder:latest \
            bash /src/docker/build-inner.sh

      - name: Upload build
        uses: actions/upload-artifact@v4
        with:
          name: Fluorine-Manager
          path: build/fluorine-manager/
          compression-level: 6
          if-no-files-found: warn

  build-nixos-mobase:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v30
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Cache Nix store
        uses: actions/cache@v4
        with:
          path: /tmp/nix-cache
          key: nix-mobase-${{ hashFiles('nix/mobase-shell.nix') }}
          restore-keys: nix-mobase-

      - name: Build mobase.so for NixOS
        run: |
          nix-shell nix/mobase-shell.nix --run "
            set -euo pipefail

            # Build libloot from source (not in nixpkgs)
            git clone --depth 1 https://github.com/loot/libloot.git /tmp/libloot
            cmake -S /tmp/libloot/cpp -B /tmp/libloot/build -G Ninja \
              -DCMAKE_BUILD_TYPE=Release \
              -DBUILD_SHARED_LIBS=ON \
              -DLIBLOOT_INSTALL_DOCS=OFF \
              -DBUILD_TESTING=OFF \
              -DCMAKE_INSTALL_PREFIX=/tmp/libloot-install
            cmake --build /tmp/libloot/build --parallel
            cmake --install /tmp/libloot/build

            # Configure full project (only mobase target will be built)
            # Use NIX_PYTHON3 (real nix python) for cmake, not the venv wrapper
            PYBIND11_DIR=\$(python3 -c 'import pybind11; print(pybind11.get_cmake_dir())')
            cmake -S . -B build-nix -G Ninja \
              -DCMAKE_BUILD_TYPE=RelWithDebInfo \
              -DPython_EXECUTABLE=\"\${NIX_PYTHON3}\" \
              -Dpybind11_DIR=\"\${PYBIND11_DIR}\" \
              -DBUILD_PLUGIN_PYTHON=ON \
              -DCMAKE_PREFIX_PATH=/tmp/libloot-install \
              -Dlibloot_DIR=/tmp/libloot-install

            # Build only mobase target
            cmake --build build-nix --target mobase --parallel

            # Package it
            mkdir -p nixos-mobase
            cp build-nix/libs/plugin_python/src/mobase/mobase.cpython-*-linux-gnu.so nixos-mobase/
            echo 'NixOS-compatible mobase pybind11 module for Fluorine Manager.' > nixos-mobase/README.txt
            echo 'Drop this .so into your plugins/libs/ directory, replacing the existing one.' >> nixos-mobase/README.txt
          "

      - name: Upload NixOS mobase
        uses: actions/upload-artifact@v4
        with:
          name: mobase-nixos
          path: nixos-mobase/
          compression-level: 6
          if-no-files-found: warn