name: Backend Tests

on:
  push:
    branches: [main, dev]
    paths:
      - 'apps/**'
      - 'core/**'
      - 'tests/**'
      - 'dispatcharr/**'
      - 'pyproject.toml'
      - 'version.py'
      - 'manage.py'
      - 'scripts/ci_backend_test_labels.py'
      - 'scripts/ci_bootstrap_backend.sh'
      - '.github/workflows/backend-tests.yml'
  pull_request:
    branches: [main, dev]
    paths:
      - 'apps/**'
      - 'core/**'
      - 'tests/**'
      - 'dispatcharr/**'
      - 'pyproject.toml'
      - 'version.py'
      - 'manage.py'
      - 'scripts/ci_backend_test_labels.py'
      - 'scripts/ci_bootstrap_backend.sh'
      - '.github/workflows/backend-tests.yml'
  workflow_dispatch:
    inputs:
      full_suite:
        description: Run the full backend test suite
        type: boolean
        default: true

permissions:
  contents: read
  packages: read

concurrency:
  group: backend-tests-${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  plan:
    name: Plan test groups
    runs-on: ubuntu-latest
    outputs:
      labels: ${{ steps.resolve.outputs.labels }}
      has_tests: ${{ steps.resolve.outputs.has_tests }}
      base_image: ${{ steps.base_image.outputs.image }}
      sync_python_deps: ${{ steps.base_image.outputs.sync_python_deps }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Collect changed paths
        id: changed
        shell: bash
        run: |
          set -euo pipefail
          : > /tmp/changed_paths.txt

          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            if [ "${{ inputs.full_suite }}" = "true" ]; then
              : > /tmp/changed_paths.txt
              echo "mode=full" >> "$GITHUB_OUTPUT"
            else
              git diff --name-only HEAD~1 HEAD > /tmp/changed_paths.txt || true
              echo "mode=diff" >> "$GITHUB_OUTPUT"
            fi
          elif [ "${{ github.event_name }}" = "pull_request" ]; then
            git fetch origin "${{ github.base_ref }}"
            git diff --name-only "origin/${{ github.base_ref }}...HEAD" > /tmp/changed_paths.txt
            echo "mode=pr" >> "$GITHUB_OUTPUT"
          else
            if [ "${{ github.event.before }}" = "0000000000000000000000000000000000000000" ]; then
              git ls-files > /tmp/changed_paths.txt
              echo "mode=initial-push" >> "$GITHUB_OUTPUT"
            else
              git diff --name-only "${{ github.event.before }}" "${{ github.sha }}" > /tmp/changed_paths.txt
              echo "mode=push" >> "$GITHUB_OUTPUT"
            fi
          fi

      - name: Select base image
        id: base_image
        shell: bash
        run: |
          set -euo pipefail
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            TARGET_BRANCH="${{ github.base_ref }}"
          else
            TARGET_BRANCH="${{ github.ref_name }}"
          fi
          if [ "$TARGET_BRANCH" = "main" ]; then
            TAG="base"
          else
            TAG="base-dev"
          fi
          REPO_OWNER="$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')"
          REPO_NAME="$(echo "${{ github.event.repository.name }}" | tr '[:upper:]' '[:lower:]')"
          echo "image=ghcr.io/${REPO_OWNER}/${REPO_NAME}:${TAG}" >> "$GITHUB_OUTPUT"
          if grep -qx 'pyproject.toml' /tmp/changed_paths.txt || [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "sync_python_deps=true" >> "$GITHUB_OUTPUT"
          else
            echo "sync_python_deps=false" >> "$GITHUB_OUTPUT"
          fi
          echo "Using base image: ghcr.io/${REPO_OWNER}/${REPO_NAME}:${TAG}"

      - name: Resolve Django test labels
        id: resolve
        env:
          FULL_SUITE: ${{ github.event_name == 'workflow_dispatch' && inputs.full_suite == true && 'true' || 'false' }}
        run: |
          set -euo pipefail
          LABELS=$(python scripts/ci_backend_test_labels.py < /tmp/changed_paths.txt)
          echo "labels=${LABELS}" >> "$GITHUB_OUTPUT"
          if [ "${LABELS}" = "[]" ]; then
            echo "has_tests=false" >> "$GITHUB_OUTPUT"
          else
            echo "has_tests=true" >> "$GITHUB_OUTPUT"
          fi
          echo "Selected labels: ${LABELS}"

  test:
    name: ${{ matrix.label }}
    needs: plan
    if: needs.plan.outputs.has_tests == 'true'
    runs-on: ubuntu-latest
    container:
      image: ${{ needs.plan.outputs.base_image }}
      credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
      options: --entrypoint ""
    strategy:
      max-parallel: 6
      fail-fast: false
      matrix:
        label: ${{ fromJSON(needs.plan.outputs.labels) }}
    env:
      DISPATCHARR_ENV: aio
      DJANGO_SECRET_KEY: ci-test-secret-key
      POSTGRES_DB: dispatcharr
      POSTGRES_USER: dispatch
      POSTGRES_PASSWORD: secret
      DISPATCHARR_LOG_LEVEL: WARNING
      SYNC_PYTHON_DEPS: ${{ needs.plan.outputs.sync_python_deps }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Run tests in base image
        env:
          GITHUB_WORKSPACE: ${{ github.workspace }}
        run: bash scripts/ci_bootstrap_backend.sh "${{ matrix.label }}" -v2