name: Release

on:
  push:
     branches:
       - main

jobs:
  checks:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          nix_path: nixpkgs=channel:nixos-unstable
      - name: Run Checks
        run: nix develop --no-pure-eval --accept-flake-config --command just check-all

  release:
    needs: checks
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.CI_TOKEN }}

      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Check for releasable commits
        id: releasable
        run: |
          COUNT=$(git-cliff --unreleased | tail -n +3 | wc -l)
          echo "count=$COUNT" >> $GITHUB_OUTPUT

      - name: Determine next version
        if: steps.releasable.outputs.count > 0
        id: next_version
        run: echo "version=$(git-cliff --bumped-version)" >> $GITHUB_OUTPUT

      - name: Update changelog
        if: steps.releasable.outputs.count > 0
        run: git-cliff --bump -o CHANGELOG.md

      - name: Create release commit
        if: steps.releasable.outputs.count > 0
        run: |
          VERSION=${{ steps.next_version.outputs.version }}
          nix develop --no-pure-eval --accept-flake-config --command cargo set-version "$VERSION"
          git config user.name "CI Bot"
          git config user.email "ci@phundrak.com"
          git add Cargo.toml Cargo.lock CHANGELOG.md
          git commit -m "chore(release): release $VERSION [skip ci]"
          git push origin main

      - name: Create version tag
        if: steps.releasable.outputs.count > 0
        run: |
          VERSION=${{ steps.next_version.outputs.version }}
          git tag "$VERSION"
          git push origin "$VERSION"

      - name: Build Linux release binaries
        if: steps.releasable.outputs.count > 0
        run: nix build

      - name: Build Windows release binaries
        if: steps.releasable.outputs.count > 0
        run: nix build .#windows

      - name: Publish on crates.io
        if: steps.releasable.outputs.count > 0
        run: nix develop --no-pure-eval --accept-flake-config --command cargo publish
        env:
          CARGO_REGISTRIES_CRATES_IO_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}

      - name: Rebase develop onto main
        if: steps.releasable.outputs.count > 0
        run: |
          git fetch origin
          git checkout develop
          git rebase origin/main

      - name: Bump to next dev version
        if: steps.releasable.outputs.count > 0
        run: |
          VERSION=${{ steps.next_version.outputs.version }}
          # Bump patch and append -dev
          NEXT_DEV=$(echo $VERSION | awk -F. '{print $1"."$2"."$3+1}')"-dev"
          nix develop --no-pure-eval --accept-flake-config --command cargo set-version "$NEXT_DEV"
          git add Cargo.toml Cargo.lock
          git commit -m "chore(release): bump version to $NEXT_DEV [skip ci]"
          git push origin develop