name: CI

on:
  pull_request:
    types: [opened, synchronize]
  workflow_dispatch:

env:
  PIP_BREAK_SYSTEM_PACKAGES: "1"
  PYTHONPATH: src
  CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
  CI_GITEA_USERNAME: ${{ vars.CI_GITEA_USERNAME }}

jobs:
  # Single validation job that merges: quality, detect-changes,
  # release-dry-run, pre-merge-check, pr-review, and discover-runners.
  # Uses ci-full image (has git-cliff for release-dry-run).
  # Saves ~5x checkout+setup overhead vs 6 separate jobs.
  validate:
    runs-on: docker
    container:
      image: git.oblachno.oblachno.fyi/oblachno-oss/runner-images/ci-full:latest
      credentials:
        username: ${{ vars.CI_GITEA_USERNAME }}
        password: ${{ secrets.CI_GITEA_API_TOKEN }}
    timeout-minutes: 15
    defaults:
      run:
        shell: bash
    outputs:
      ansible-changed: ${{ steps.detect.outputs.ansible-changed }}
      user-facing-changed: ${{ steps.detect.outputs.user-facing-changed }}
      runner-count: ${{ steps.discover-runners.outputs.runner-count }}
      runner-indices: ${{ steps.discover-runners.outputs.runner-indices }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - uses: ./.gitea/actions/setup-env
        with:
          extras: "ci,lint"
      - uses: ./.gitea/actions/quality-checks
        with:
          package: grm
          test-speed-max: "4"
          translations-file: src/grm/translations.json
      - name: Workflow dry-run validation
        run: |
          . .venv/bin/activate 2>/dev/null || true
          export PATH="$HOME/.local/bin:$PATH"
          # Best-effort: only runs if act_runner is installed
          if command -v act_runner >/dev/null 2>&1; then
            make workflow-dryrun
          else
            echo "act_runner not found — skipping workflow dry-run (static lint still passed)"
          fi
      # --- detect-changes step ---
      - name: Detect changed paths
        id: detect
        env:
          DEVX_TASK_PREFIX: GRM
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.ci.classify_changes \
            --base "origin/master" \
            --head "${{ github.event.pull_request.head.sha || github.sha }}" \
            --github-output
      # --- validate-pr + pr-review steps (PR only) ---
      - name: Validate auto-merge preconditions
        if: github.event_name == 'pull_request'
        env:
          VIKUNJA_TOKEN: ${{ secrets.VIKUNJA_TOKEN }}
          DEVX_TASK_PREFIX: GRM
          DEVX_VIKUNJA_PROJECT_ID: 6
          HEAD_REF: ${{ github.head_ref }}
          PR_TITLE: ${{ github.event.pull_request.title }}
          REPOSITORY: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.number }}
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.ci.check_auto_merge_ready \
            --branch "$HEAD_REF" \
            --pr-title "$PR_TITLE" \
            --repo "$REPOSITORY" \
            --pr-number "$PR_NUMBER"
      - name: Run automated PR review
        if: github.event_name == 'pull_request'
        run: |
          . .venv/bin/activate 2>/dev/null || true
          set -euo pipefail
          python3 -m devx.ci.pr_review \
            "${{ github.event.number }}" \
            "${{ github.repository }}"
      # --- release-dry-run step (conditional) ---
      - name: Release dry-run validation
        if: steps.detect.outputs.user-facing-changed == 'true'
        env:
          DEVX_VERSION_FILE: src/grm/__init__.py
          DEVX_TASK_PREFIX: GRM
        run: |
          . .venv/bin/activate 2>/dev/null || true
          export PATH="$HOME/.local/bin:$PATH"
          python3 -m devx.ci.release --dry-run
      # --- discover-runners step (conditional on ansible-changed) ---
      - name: Discover available molecule runners
        id: discover-runners
        if: steps.detect.outputs.ansible-changed == 'true'
        env:
          MOLECULE_RUNNERS: ${{ vars.MOLECULE_RUNNERS }}
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.molecule.discover_runners \
            --owner "${{ github.repository_owner }}" \
            --repo "${{ github.event.repository.name }}" \
            --github-output
      - uses: ./.gitea/actions/notify-failure
        with:
          workflow: "ci/validate"

  molecule-tests:
    needs: [validate]
    if: needs.validate.outputs.ansible-changed == 'true'
    runs-on: docker
    container:
      image: git.oblachno.oblachno.fyi/oblachno-oss/runner-images/ci-full:latest
      credentials:
        username: ${{ vars.CI_GITEA_USERNAME }}
        password: ${{ secrets.CI_GITEA_API_TOKEN }}
    timeout-minutes: 15
    strategy:
      fail-fast: false
      max-parallel: 4
      matrix:
        runner-index: [1, 2, 3, 4]
    steps:
      - uses: actions/checkout@v4
      - name: Set up environment
        env:
          CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
          CI_GITEA_USERNAME: ${{ vars.CI_GITEA_USERNAME }}
        run: make setup-image EXTRAS=ci,molecule
      - name: Install Ansible collections
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.tools.setup --skip-install --no-pre-commit --no-tea-login
      - name: Discover assigned test pairs
        env:
          RUNNER_INDEX: ${{ matrix.runner-index }}
          MAX_RUNNERS: 4
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.molecule.distribute_molecule \
            --runner-index "$RUNNER_INDEX" \
            --max-runners "$MAX_RUNNERS" \
            --github-env
      - name: Prune stale Docker data
        id: prune
        if: env.SKIP != 'true'
        run: |
          docker system prune -af --volumes 2>/dev/null || true
          disk_pct=$(df -P / | awk 'NR==2 {gsub(/%/, "", $5); print $5}')
          echo "Disk usage after prune: ${disk_pct}%"
          if [ "$disk_pct" -ge 85 ]; then
            echo "should-run=false" >> "$GITHUB_OUTPUT"
            echo "::warning::Disk usage at ${disk_pct}% after prune — skipping molecule tests to avoid ENOSPC failures"
          else
            echo "should-run=true" >> "$GITHUB_OUTPUT"
          fi
      - name: Run molecule tests
        if: env.SKIP != 'true' && steps.prune.outputs.should-run != 'false'
        shell: bash
        env:
          CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
          CI_GITEA_USERNAME: ${{ vars.CI_GITEA_USERNAME }}
          DOCKER_HOST: unix:///var/run/docker.sock
          ANSIBLE_INJECT_INVOCATION: "1"
        run: |
          . .venv/bin/activate 2>/dev/null || true
          if [ -z "$TEST_PAIRS" ]; then exit 0; fi
          if ! python3 -c "import docker; docker.from_env().ping()" 2>/dev/null; then
            echo "Docker not available in CI container — skipping molecule tests"
            exit 0
          fi
          _TOKEN="$CI_GITEA_API_TOKEN"; [ -z "$_TOKEN" ] && _TOKEN="$CI_GITEA_TOKEN"
          [ -z "$_TOKEN" ] && { echo "Gitea API token not set — skipping Docker login"; exit 0; }
          echo "$_TOKEN" | docker login git.oblachno.oblachno.fyi -u "$CI_GITEA_USERNAME" --password-stdin
          # Run each molecule test pair sequentially.
          # Pairs are 4-part: scenario|platform_name|platform_image|platform_command
          # Spaces in platform_command are encoded as __SPACE__.
          role_dir="ansible/roles/gitea_runner"
          # shellcheck disable=SC2086 # intentional word splitting for pair list
          for pair in $TEST_PAIRS; do
            IFS='|' read -r scenario platform_name platform_image platform_command <<< "$pair"
            platform_command="${platform_command//__SPACE__/ }"
            export MOLECULE_PLATFORM_NAME="$platform_name"
            export MOLECULE_PLATFORM_IMAGE="$platform_image"
            if [ -n "$platform_command" ]; then
              export MOLECULE_PLATFORM_COMMAND="$platform_command"
            else
              unset MOLECULE_PLATFORM_COMMAND
            fi
            export ANSIBLE_ALLOW_BROKEN_CONDITIONALS=true
            echo "--- Running: $scenario on $platform_name ---"
            pushd "$role_dir" >/dev/null
            if [ "$scenario" = "default" ]; then
              molecule test || {
                echo "FAILED: $pair — running molecule destroy"
                molecule destroy 2>/dev/null || true
                popd >/dev/null
                exit 1
              }
            else
              molecule test -s "$scenario" || {
                echo "FAILED: $pair — running molecule destroy"
                molecule destroy -s "$scenario" 2>/dev/null || true
                popd >/dev/null
                exit 1
              }
            fi
            popd >/dev/null
            echo "PASSED: $pair"
            docker system prune -af --volumes 2>/dev/null || true
          done
          echo "All molecule tests passed."

  auto-merge:
    # Auto-merge runs after validate passes. molecule-tests is NOT in needs
    # because Gitea Actions skips dependent jobs of skipped jobs without
    # evaluating if: conditions — having molecule-tests in needs would
    # cascade the skip to auto-merge when ansible-changed=false.
    needs: [validate]
    if: >-
      always() &&
      github.event_name == 'pull_request' &&
      needs.validate.result == 'success'
    runs-on: docker
    container:
      image: git.oblachno.oblachno.fyi/oblachno-oss/runner-images/ci-base:latest
      credentials:
        username: ${{ vars.CI_GITEA_USERNAME }}
        password: ${{ secrets.CI_GITEA_API_TOKEN }}
    timeout-minutes: 10
    defaults:
      run:
        shell: bash
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.CI_GITEA_API_TOKEN }}
      - uses: ./.gitea/actions/setup-env
        with:
          extras: "ci"
      - name: Post approval review
        env:
          REVIEWER_GITEA_API_TOKEN: ${{ secrets.REVIEWER_GITEA_API_TOKEN }}
          PR_NUMBER: ${{ github.event.number }}
          REPOSITORY: ${{ github.repository }}
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.ci.pr_review \
            "$PR_NUMBER" \
            "$REPOSITORY" \
            --event APPROVE \
            --checklist-confirmed \
            --checklist-categories 1,2,3,4,5,6,7,8,9,10,11,12,13 \
            --body "Auto-approved: all CI checks passed (validate, molecule-tests)."
      - name: Wait for molecule tests to complete
        if: needs.validate.outputs.ansible-changed == 'true'
        env:
          CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.ci.wait_for_checks \
            --job-name "molecule-tests" \
            --repo "${{ github.repository }}" \
            --timeout 1200 \
            --poll-interval 10 \
            --no-require-success
      - name: Squash merge with task ID
        env:
          CI_GITEA_API_TOKEN: ${{ secrets.CI_GITEA_API_TOKEN }}
          VIKUNJA_TOKEN: ${{ secrets.VIKUNJA_TOKEN }}
          DEVX_TASK_PREFIX: GRM
          DEVX_VIKUNJA_PROJECT_ID: 6
          HEAD_REF: ${{ github.head_ref }}
          PR_TITLE: ${{ github.event.pull_request.title }}
          REPOSITORY: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.number }}
        run: |
          . .venv/bin/activate 2>/dev/null || true
          python3 -m devx.ci.auto_merge \
            "$HEAD_REF" \
            "$PR_TITLE" \
            "$REPOSITORY" \
            "$PR_NUMBER"