name: ci

on:
  push:
    branches:
      - "**"
  pull_request:
  workflow_dispatch:

env:
  REGISTRY: gcr.forust.xyz

jobs:
  lint:
    runs-on: [self-hosted, linux, arch, homelab]
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Check formatting with Prettier
        shell: bash
        run: |
          mapfile -t prettier_files < <(
            git ls-files \
              | grep -E '\.(md|json|ya?ml|html|css)$' \
              | grep -Ev '^(\.docs/|\.zed/|errorpages/html/|homepages/(forust_files|xdfnx_files)/)'
          )

          if [ "${#prettier_files[@]}" -eq 0 ]; then
            echo "No Prettier-managed files found."
            exit 0
          fi

          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            node:22-alpine \
            sh -lc 'npx --yes prettier@3 --check --ignore-unknown "$@"' sh "${prettier_files[@]}"

      - name: Lint Python with Ruff
        shell: bash
        run: |
          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            ghcr.io/astral-sh/ruff:latest \
            check .

      - name: Lint YAML syntax
        shell: bash
        run: |
          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            cytopia/yamllint:latest \
            -c .yamllint .

      - name: Lint Dockerfiles
        shell: bash
        run: |
          mapfile -t dockerfiles < <(
            git ls-files ':(glob)**/Dockerfile' ':(glob)**/Dockerfile.*'
          )

          if [ "${#dockerfiles[@]}" -eq 0 ]; then
            echo "No Dockerfiles found."
            exit 0
          fi

          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            --entrypoint hadolint \
            hadolint/hadolint:latest-debian \
            -c .hadolint.yaml "${dockerfiles[@]}"

  validate:
    runs-on: [self-hosted, linux, arch, homelab]
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Validate YAML syntax
        shell: bash
        run: |
          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            cytopia/yamllint:latest \
            -c .yamllint .

      - name: Validate Kubernetes manifests
        shell: bash
        run: |
          mapfile -t manifests < <(
            git ls-files ':(glob)**/k8s/**/*.yaml' ':(glob)**/k8s/**/*.yml' \
              | grep -Ev '(^|/)(kustomization\.ya?ml|.*\.example\.ya?ml|.*values\.ya?ml|patch-.*\.ya?ml)$'
          )

          if [ "${#manifests[@]}" -eq 0 ]; then
            echo "No Kubernetes manifests found."
            exit 0
          fi

          docker run --rm \
            -v "$PWD:/work" \
            -w /work \
            ghcr.io/yannh/kubeconform:latest \
            -strict \
            -ignore-missing-schemas \
            -summary \
            "${manifests[@]}"

  build:
    if: github.event_name != 'pull_request' && (github.ref_name == 'main' || github.ref_name == 'dev')
    runs-on: [self-hosted, linux, arch, homelab]
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Detect changed docker-built services
        id: services
        shell: bash
        run: |
          base="${{ github.event.before }}"
          if [ -z "$base" ] || [ "$base" = "0000000000000000000000000000000000000000" ]; then
            base="$(git rev-list --max-parents=0 HEAD)"
          fi

          mapfile -t changed_files < <(git diff --name-only "$base" "${GITHUB_SHA}")

          services=()

          add_service() {
            local name="$1"
            local seen=0
            for existing in "${services[@]}"; do
              if [ "$existing" = "$name" ]; then
                seen=1
                break
              fi
            done
            if [ "$seen" -eq 0 ]; then
              services+=("$name")
            fi
          }

          for file in "${changed_files[@]}"; do
            case "$file" in
              dtek_notif/*)
                add_service dtek_notif
                ;;
              errorpages/*)
                add_service errorpages
                ;;
              userbot/*)
                add_service userbot
                ;;
              homepages/*)
                add_service homepages
                ;;
              edu_master/phpsessid-bot/*|edu_master/webinar-checker/*|edu_master/compose.yaml)
                add_service edu_master
                ;;
            esac
          done

          if [ "${#services[@]}" -eq 0 ]; then
            echo "No docker-built services changed."
            echo "services=" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          printf '%s\n' "${services[@]}" | tee /tmp/services.txt
          echo "services=$(paste -sd, /tmp/services.txt)" >> "$GITHUB_OUTPUT"

      - name: Log in to registry
        if: steps.services.outputs.services != ''
        shell: bash
        run: |
          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login "${REGISTRY}" \
            -u "${{ secrets.REGISTRY_USERNAME }}" \
            --password-stdin

      - name: Build and push changed images
        if: steps.services.outputs.services != ''
        shell: bash
        run: |
          IFS=, read -r -a services <<< "${{ steps.services.outputs.services }}"

          for service in "${services[@]}"; do
            case "$service" in
              dtek_notif)
                image="${REGISTRY}/forust/dtek-notif"
                tags=("latest")
                case "${GITHUB_REF_NAME}" in
                  main)
                    tags+=("main" "prod")
                    ;;
                  dev)
                    tags+=("dev")
                    ;;
                esac
                build_args=()
                for tag in "${tags[@]}"; do
                  build_args+=(-t "${image}:${tag}")
                done
                docker build "${build_args[@]}" dtek_notif
                for tag in "${tags[@]}"; do
                  docker push "${image}:${tag}"
                done
                ;;
              errorpages)
                image="${REGISTRY}/forust/error-pages"
                tags=("latest")
                case "${GITHUB_REF_NAME}" in
                  main)
                    tags+=("main" "prod")
                    ;;
                  dev)
                    tags+=("dev")
                    ;;
                esac
                build_args=()
                for tag in "${tags[@]}"; do
                  build_args+=(-t "${image}:${tag}")
                done
                docker build "${build_args[@]}" errorpages
                for tag in "${tags[@]}"; do
                  docker push "${image}:${tag}"
                done
                ;;
              userbot)
                image="${REGISTRY}/forust/userbot"
                tags=("latest")
                case "${GITHUB_REF_NAME}" in
                  main)
                    tags+=("main" "prod")
                    ;;
                  dev)
                    tags+=("dev")
                    ;;
                esac
                build_args=()
                for tag in "${tags[@]}"; do
                  build_args+=(-t "${image}:${tag}")
                done
                docker build "${build_args[@]}" userbot
                for tag in "${tags[@]}"; do
                  docker push "${image}:${tag}"
                done
                ;;
              homepages)
                for service in forust xdfnx; do
                  case "$service" in
                    forust)
                      image="${REGISTRY}/forust/forust-homepage"
                      ;;
                    xdfnx)
                      image="${REGISTRY}/forust/xdfnx-homepage"
                      ;;
                  esac
                  tags=("latest")
                  case "${GITHUB_REF_NAME}" in
                    main)
                      tags+=("main" "prod")
                      ;;
                    dev)
                      tags+=("dev")
                      ;;
                  esac
                  build_args=()
                  for tag in "${tags[@]}"; do
                    build_args+=(-t "${image}:${tag}")
                  done
                  docker build "${build_args[@]}" -f "homepages/Dockerfile.${service}" homepages
                  for tag in "${tags[@]}"; do
                    docker push "${image}:${tag}"
                  done
                done
                ;;
              edu_master)
                for service in session-keeper webinar-checker; do
                  case "$service" in
                    session-keeper)
                      context="edu_master/phpsessid-bot"
                      image="${REGISTRY}/forust/session-keeper"
                      ;;
                    webinar-checker)
                      context="edu_master/webinar-checker"
                      image="${REGISTRY}/forust/webinar-checker"
                      ;;
                  esac
                  tags=("latest")
                  case "${GITHUB_REF_NAME}" in
                    main)
                      tags+=("main" "prod")
                      ;;
                    dev)
                      tags+=("dev")
                      ;;
                  esac
                  build_args=()
                  for tag in "${tags[@]}"; do
                    build_args+=(-t "${image}:${tag}")
                  done
                  docker build "${build_args[@]}" "$context"
                  for tag in "${tags[@]}"; do
                    docker push "${image}:${tag}"
                  done
                done
                ;;
            esac
          done