name: docker

# Build + smoke-test the remote-HTTP (`familiar serve`) image on every push/PR;
# push to the Gitea container registry only on a real merge to main/dev.
# Runs alongside ci.yml (which publishes the Python wheel) — they don't overlap.
on:
  push:
    branches: [main, dev]
  pull_request:
    branches: [main, dev]

jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          enable-cache: true
      - name: Install dependencies
        run: uv sync --group dev
      - name: Ruff (lint + format check)
        run: |
          uv run ruff check .
          uv run ruff format --check .

  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          enable-cache: true
      - name: Install dependencies
        run: uv sync --group dev
      - name: Run tests with coverage (fails under 80%)
        run: uv run pytest

  docker:
    needs: [lint, test]
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4

      - name: Compute image name & tags
        id: meta
        shell: bash
        run: |
          IMAGE="git.hiddenden.cafe/${GITHUB_REPOSITORY,,}"
          echo "image=${IMAGE}" >> "$GITHUB_OUTPUT"
          echo "sha_tag=${IMAGE}:sha-${GITHUB_SHA::12}" >> "$GITHUB_OUTPUT"
          # Per-commit container name: the self-hosted runner shares the host
          # Docker daemon, so a fixed name collides across concurrent/re-run jobs.
          echo "container=familiar-smoke-${GITHUB_SHA::12}" >> "$GITHUB_OUTPUT"
          if [ "${GITHUB_REF_NAME}" = "main" ]; then
            echo "branch_tags=${IMAGE}:latest ${IMAGE}:main" >> "$GITHUB_OUTPUT"
          else
            echo "branch_tags=${IMAGE}:${GITHUB_REF_NAME}" >> "$GITHUB_OUTPUT"
          fi

      - name: Build image
        shell: bash
        run: docker build -f docker/Dockerfile -t "${{ steps.meta.outputs.sha_tag }}" .

      - name: Smoke-test image
        shell: bash
        run: |
          set -euo pipefail
          IMG="${{ steps.meta.outputs.sha_tag }}"
          CONTAINER="${{ steps.meta.outputs.container }}"
          TOKEN="smoke-$(date +%s)"

          # Remove any container left behind by a killed/re-run job before we
          # reuse the name (shared host daemon → stale containers can survive).
          docker rm -f "$CONTAINER" >/dev/null 2>&1 || true

          # 1. Runs as a non-root user (uid 1000).
          uid=$(docker run --rm --entrypoint id "$IMG" -u)
          echo "container uid: $uid"
          [ "$uid" = "1000" ] || { echo "::error::image runs as uid $uid, expected 1000"; exit 1; }

          # 2. Boot the server and probe it from *inside* its own container via
          # `docker exec`. On self-hosted runners the job step runs in a container
          # that shares the host's Docker socket but sits on a different network,
          # so it can reach neither a published host port (-p lands on the runner
          # host, not this step's netns) nor the server container's bridge IP
          # (different network → connect hangs). `docker exec` goes through the
          # socket and runs the probe in the server's own netns, where
          # 127.0.0.1:8080 always works regardless of runner topology. The image
          # ships python + httpx, so no curl or extra pull is needed.
          docker run -d --name "$CONTAINER" -e FAMILIAR_HTTP_TOKEN="$TOKEN" "$IMG"

          # probe "<httpx call returning a Response>" -> prints the status code
          probe() { docker exec "$CONTAINER" python -c "import httpx; print(($1).status_code)"; }

          for i in $(seq 1 30); do
            if docker exec "$CONTAINER" python -c \
              "import httpx; httpx.get('http://127.0.0.1:8080/healthz', timeout=5)" >/dev/null 2>&1; then
              break
            fi
            sleep 1
          done

          echo "== /healthz (expect 200) =="
          code=$(probe "httpx.get('http://127.0.0.1:8080/healthz', timeout=10)")
          [ "$code" = "200" ] || { echo "::error::/healthz returned $code"; docker logs "$CONTAINER"; exit 1; }

          echo "== MCP without token (expect 401) =="
          code=$(probe "httpx.post('http://127.0.0.1:8080/mcp', timeout=10, headers={'Accept':'application/json, text/event-stream','Content-Type':'application/json'}, json={'jsonrpc':'2.0','id':1,'method':'initialize','params':{}})")
          [ "$code" = "401" ] || { echo "::error::unauthenticated MCP returned $code"; exit 1; }

          echo "== MCP with valid token (expect 200) =="
          code=$(probe "httpx.post('http://127.0.0.1:8080/mcp', timeout=10, headers={'Authorization':'Bearer $TOKEN','Accept':'application/json, text/event-stream','Content-Type':'application/json'}, json={'jsonrpc':'2.0','id':1,'method':'initialize','params':{'protocolVersion':'2025-06-18','capabilities':{},'clientInfo':{'name':'ci','version':'1'}}})")
          [ "$code" = "200" ] || { echo "::error::authenticated MCP returned $code"; docker logs "$CONTAINER"; exit 1; }

          echo "Image smoke-test passed."

      - name: Log in to Gitea Container Registry
        if: github.event_name == 'push' && (github.ref_name == 'main' || github.ref_name == 'dev')
        uses: docker/login-action@v3
        with:
          registry: git.hiddenden.cafe
          username: ${{ github.actor }}
          # PAT with write:package scope (the auto GITEA_TOKEN lacks it here).
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Tag & push
        if: github.event_name == 'push' && (github.ref_name == 'main' || github.ref_name == 'dev')
        shell: bash
        run: |
          for tag in ${{ steps.meta.outputs.branch_tags }} ${{ steps.meta.outputs.sha_tag }}; do
            docker tag "${{ steps.meta.outputs.sha_tag }}" "$tag"
            docker push "$tag"
            echo "Pushed $tag"
          done

      # Always runs — removes only what this run created (the self-hosted runner
      # may share the host Docker daemon, so no global prune of other services).
      - name: Cleanup
        if: always()
        shell: bash
        run: |
          docker rm -f ${{ steps.meta.outputs.container }} || true
          docker rmi -f ${{ steps.meta.outputs.sha_tag }} ${{ steps.meta.outputs.branch_tags }} || true
          docker image prune -f || true
          docker builder prune -f || true