name: Nightly Build

on:
  schedule:
    - cron: '0 0 * * *'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  generate-version:
    name: Generate Version
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.version.outputs.version }}
      tag: ${{ steps.version.outputs.tag }}
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Generate version
        id: version
        run: |
          DATE=$(date -u +%Y%m%d)
          SHA=$(git rev-parse --short=8 HEAD)
          BASE_VERSION=$(git describe --tags --match "v*" --exclude "*nightly*" --abbrev=0 2>/dev/null || true)
          if [ -z "$BASE_VERSION" ] || [ "$BASE_VERSION" = "v0.0.0" ]; then
            VERSION="nightly-${DATE}-${SHA}"
          else
            VERSION="${BASE_VERSION}-nightly-${DATE}-${SHA}"
          fi
          TAG="nightly-${DATE}-${SHA}"
          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"

  build:
    name: Build
    runs-on: ubuntu-latest
    needs: generate-version
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Setup Go
        uses: actions/setup-go@v6
        with:
          go-version-file: go.mod

      - name: Build
        env:
          VERSION: ${{ needs.generate-version.outputs.version }}
        run: make build-all VERSION="$VERSION"

      - name: Upload artifacts
        uses: actions/upload-artifact@v6
        with:
          name: picoclaw-binaries
          path: build

  build-docker:
    name: Build Docker
    runs-on: ubuntu-latest
    needs: generate-version
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

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

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value=${{ needs.generate-version.outputs.tag }}
            type=raw,value=${{ needs.generate-version.outputs.version }}
            type=raw,value=nightly

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./docker/Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          platforms: linux/amd64,linux/arm64,linux/riscv64
          provenance: false

  release:
    name: Release
    runs-on: ubuntu-latest
    needs: [generate-version, build, build-docker]
    permissions:
      contents: write
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Download artifacts
        uses: actions/download-artifact@v6
        with:
          name: picoclaw-binaries
          path: ./build

      - name: Create release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          TAG="${{ needs.generate-version.outputs.tag }}"
          TITLE="${{ needs.generate-version.outputs.version }}"
          NOTES=$'Nightly build for **${{ needs.generate-version.outputs.version }}**\n\nThis is an automated build and may be unstable. Use with caution.'

          if gh release view "$TAG" >/dev/null 2>&1; then
            echo "Release $TAG already exists, updating metadata and assets..."
            gh release edit "$TAG" \
              --title "$TITLE" \
              --notes "$NOTES" \
              --prerelease
            gh release upload "$TAG" build/* --clobber
          else
            echo "Creating new release $TAG..."
            gh release create "$TAG" \
              --title "$TITLE" \
              --notes "$NOTES" \
              --target "${{ github.sha }}" \
              --prerelease \
              build/*
          fi

          echo "Updating rolling 'nightly' release..."
          gh release delete nightly --cleanup-tag -y >/dev/null 2>&1 || true
          sleep 2
          gh release create nightly \
            --title "Nightly Build" \
            --notes "$NOTES" \
            --target "${{ github.sha }}" \
            --prerelease \
            build/*

          echo "Cleaning up old nightly releases (keeping only the most recent)..."
          gh release list --limit 100 --json tagName -q '.[].tagName | select(startswith("nightly-"))' | tail -n +2 | while read -r old_tag; do
            if [ -n "$old_tag" ] && [ "$old_tag" != "$TAG" ]; then
              echo "Deleting old nightly release: $old_tag"
              gh release delete "$old_tag" --cleanup-tag -y || true
            fi
          done