name: Build and Deploy Gateway

on:
  push:
    branches: [master]
  workflow_dispatch:

env:
  DEPLOY_PATH: /opt/vpn-proxy
  BASE_IMAGE: vpn-proxy-runtime-base:bookworm-slim
  NODE_BUILD_IMAGE: mirror.gcr.io/library/node:20.19-bookworm
  RUNTIME_BASE_SOURCE_IMAGE: mirror.gcr.io/library/debian:bookworm-slim
  APT_MIRROR: http://mirror.yandex.ru/debian
  APT_SECURITY_MIRROR: http://mirror.yandex.ru/debian-security
  SINGBOX_VERSION: 1.12.13

jobs:
  build-and-push:
    runs-on: ubuntu-22.04
    outputs:
      affected_components: ${{ steps['gateway-build'].outputs.affected_components }}
      restart_scope: ${{ steps['gateway-build'].outputs.restart_scope }}
    steps:
      - name: Clone repository
        env:
          GIT_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        run: |
          set -euo pipefail
          SERVER_HOST=$(echo "${{ gitea.server_url }}" | sed 's|https\?://||')
          rm -rf repo
          git clone "http://${{ gitea.actor }}:${GIT_TOKEN}@${SERVER_HOST}/${{ gitea.repository }}.git" repo
          cd repo
          git checkout ${{ gitea.sha }}

      - name: Build and push gateway image
        id: gateway-build
        run: |
          set -euo pipefail
          cd repo

          REGISTRY_HOST=$(echo "${{ gitea.server_url }}" | sed 's|https\?://||')
          IMAGE="${REGISTRY_HOST}/${{ gitea.repository }}/gateway"
          CONTROL_IMAGE="${IMAGE}-control"
          DATAPLANE_IMAGE="${IMAGE}-dataplane"

          EVENT_NAME="${{ gitea.event_name }}"
          BEFORE_SHA="${{ gitea.event.before }}"
          ZERO_SHA="0000000000000000000000000000000000000000"
          if [ "$EVENT_NAME" = "push" ] \
            && [ -n "$BEFORE_SHA" ] \
            && [ "$BEFORE_SHA" != "$ZERO_SHA" ] \
            && git cat-file -e "${BEFORE_SHA}^{commit}" 2>/dev/null; then
            CHANGED_FILES="$(git diff --no-renames --name-only "$BEFORE_SHA" "${{ gitea.sha }}")"
          elif [ "$EVENT_NAME" = "push" ]; then
            CHANGED_FILES="package.json"
          else
            CHANGED_FILES="$(git diff-tree --no-renames --no-commit-id --name-only -r -m HEAD)"
          fi
          if command -v node >/dev/null 2>&1; then
            RUNTIME_IMPACT="$(printf '%s\n' "$CHANGED_FILES" | node scripts/runtime-impact.mjs --stdin)"
          else
            if ! docker image inspect "${{ env.BASE_IMAGE }}" >/dev/null 2>&1 \
              || ! docker run --rm "${{ env.BASE_IMAGE }}" sh -lc 'command -v node >/dev/null'; then
              echo "Cannot classify runtime impact: Node and the existing runtime base are unavailable." >&2
              exit 1
            fi
            RUNTIME_IMPACT="$(printf '%s\n' "$CHANGED_FILES" | docker run --rm -i \
              -v "$PWD:/work" \
              -w /work \
              "${{ env.BASE_IMAGE }}" \
              node scripts/runtime-impact.mjs --stdin)"
          fi
          AFFECTED_COMPONENTS="$(printf '%s\n' "$RUNTIME_IMPACT" | sed -n 's/^affected-components=//p')"
          RESTART_SCOPE="$(printf '%s\n' "$RUNTIME_IMPACT" | sed -n 's/^restart-scope=//p')"
          case "${AFFECTED_COMPONENTS}:${RESTART_SCOPE}" in
            none:none|control:control|dataplane:both|control+dataplane:both) ;;
            *) echo "Invalid runtime impact: ${RUNTIME_IMPACT}" >&2; exit 1 ;;
          esac
          echo "Affected components: ${AFFECTED_COMPONENTS}"
          echo "Restart scope: ${RESTART_SCOPE}"
          echo "affected_components=${AFFECTED_COMPONENTS}" >> "$GITHUB_OUTPUT"
          echo "restart_scope=${RESTART_SCOPE}" >> "$GITHUB_OUTPUT"
          if command -v npm >/dev/null 2>&1; then
            npm ci --no-audit --no-fund
            npm run typecheck
            npm run check:boundaries
            npm test
            npm run build:production
          else
            if ! docker run --rm "${{ env.NODE_BUILD_IMAGE }}" sh -lc 'command -v npm >/dev/null && command -v git >/dev/null && test -x /bin/bash'; then
              echo "Cannot validate change: host npm and the Node 20.19 build toolchain are unavailable." >&2
              exit 1
            fi
            echo "Host npm not found; validating inside ${{ env.NODE_BUILD_IMAGE }}"
            docker run --rm \
              --network host \
              -v "$PWD:/work" \
              -w /work \
              "${{ env.NODE_BUILD_IMAGE }}" \
              sh -lc 'npm ci --no-audit --no-fund && npm run typecheck && npm run check:boundaries && npm test && npm run build:production'
          fi
          if [ "$RESTART_SCOPE" = "none" ]; then
            echo "Image build and push skipped: no Gateway runtime impact."
            exit 0
          fi

          echo "Build runner: $(hostname)"
          echo "Base image: ${{ env.BASE_IMAGE }}"
          echo "Docker context: $(docker context show 2>/dev/null || true)"
          docker info 2>/dev/null | sed -n '/HTTP Proxy:/p;/HTTPS Proxy:/p;/Name:/p'

          if ! docker image inspect "${{ env.BASE_IMAGE }}" >/dev/null 2>&1 \
            || ! docker run --rm "${{ env.BASE_IMAGE }}" sh -lc 'command -v npm >/dev/null'; then
            echo "Runtime base image ${{ env.BASE_IMAGE }} is missing npm; building it now."
            BASE_IMAGE="${{ env.RUNTIME_BASE_SOURCE_IMAGE }}" \
            RUNTIME_BASE_IMAGE="${{ env.BASE_IMAGE }}" \
            APT_MIRROR="${{ env.APT_MIRROR }}" \
            APT_SECURITY_MIRROR="${{ env.APT_SECURITY_MIRROR }}" \
            SINGBOX_VERSION="${{ env.SINGBOX_VERSION }}" \
            ./scripts/build-runtime-base.sh
          fi

          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "$REGISTRY_HOST" -u "${{ gitea.actor }}" --password-stdin
          DOCKER_BUILDKIT=1 docker build \
            --network host \
            --pull=false \
            --build-arg NODE_BUILD_IMAGE="${{ env.NODE_BUILD_IMAGE }}" \
            --build-arg BASE_IMAGE="${{ env.BASE_IMAGE }}" \
            --build-arg SINGBOX_VERSION="${{ env.SINGBOX_VERSION }}" \
            --build-arg INSTALL_RUNTIME_DEPS=false \
            --build-arg INSTALL_SINGBOX=false \
            -t "${CONTROL_IMAGE}:latest" \
            -t "${CONTROL_IMAGE}:${{ gitea.sha }}" \
            -t "${DATAPLANE_IMAGE}:latest" \
            -t "${DATAPLANE_IMAGE}:${{ gitea.sha }}" \
            .
          docker push "${CONTROL_IMAGE}:latest"
          docker push "${CONTROL_IMAGE}:${{ gitea.sha }}"
          docker push "${DATAPLANE_IMAGE}:latest"
          docker push "${DATAPLANE_IMAGE}:${{ gitea.sha }}"

  deploy:
    runs-on: lxc-111
    needs: build-and-push
    steps:
      - name: Clone repository
        env:
          GIT_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        run: |
          set -euo pipefail
          SERVER_HOST=$(echo "${{ gitea.server_url }}" | sed 's|https\?://||')
          rm -rf repo
          git clone --depth 2 "http://${{ gitea.actor }}:${GIT_TOKEN}@${SERVER_HOST}/${{ gitea.repository }}.git" repo
          cd repo
          git checkout ${{ gitea.sha }}

      - name: Pull and deploy gateway image
        run: |
          set -euo pipefail
          cd repo

          REGISTRY_HOST=$(echo "${{ gitea.server_url }}" | sed 's|https\?://||')
          IMAGE="${REGISTRY_HOST}/${{ gitea.repository }}/gateway"
          CONTROL_IMAGE="${IMAGE}-control:${{ gitea.sha }}"
          DATAPLANE_IMAGE="${IMAGE}-dataplane:${{ gitea.sha }}"
          AFFECTED_COMPONENTS="${{ needs['build-and-push'].outputs.affected_components }}"
          RESTART_SCOPE="${{ needs['build-and-push'].outputs.restart_scope }}"
          case "${AFFECTED_COMPONENTS}:${RESTART_SCOPE}" in
            none:none|control:control|dataplane:both|control+dataplane:both) ;;
            *) echo "Invalid runtime impact output: ${AFFECTED_COMPONENTS}:${RESTART_SCOPE}" >&2; exit 1 ;;
          esac
          if [ "$RESTART_SCOPE" = "none" ]; then
            echo "Deploy skipped: no Gateway runtime impact."
            exit 0
          fi
          UPDATE_DATAPLANE=false
          if [ "$RESTART_SCOPE" = "both" ]; then
            UPDATE_DATAPLANE=true
          fi

          echo "Deploy runner: $(hostname)"
          echo "Affected components: ${AFFECTED_COMPONENTS}"
          echo "Restart scope: ${RESTART_SCOPE}"
          echo "Update dataplane: ${UPDATE_DATAPLANE}"
          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "$REGISTRY_HOST" -u "${{ gitea.actor }}" --password-stdin
          DEPLOY_PATH="${{ env.DEPLOY_PATH }}" \
            CONTROL_IMAGE="${CONTROL_IMAGE}" \
            DATAPLANE_IMAGE="${DATAPLANE_IMAGE}" \
            UPDATE_DATAPLANE="${UPDATE_DATAPLANE}" \
            bash scripts/deploy-gateway.sh