name: lpt-fe Build & Deploy

on:
  workflow_dispatch:
    inputs:
      environment:
        description: '部署环境（dev 仅允许 dev 分支；prod 仅允许 master/main）'
        required: true
        type: choice
        options:
          - dev
          - prod

env:
  REGISTRY: 192.168.123.199:5000
  APP: lpt-fe
  REPO_URL: http://git.cat-shark.xyz/cat-shark/lpt-fe.git

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Validate branch ↔ environment
        run: |
          set -euo pipefail
          REF="${{ gitea.ref }}"
          BRANCH="${REF#refs/heads/}"
          # tag 触发时拒绝
          if [[ "$REF" == refs/tags/* ]]; then
            echo "ERROR: 请从分支触发部署，不要用 tag。当前 ref=$REF"
            exit 1
          fi
          ENV="${{ inputs.environment }}"
          echo "branch=$BRANCH environment=$ENV sha=${{ gitea.sha }}"
          case "$ENV" in
            prod)
              case "$BRANCH" in
                master|main) echo "OK: prod 允许从 $BRANCH 部署" ;;
                *)
                  echo "ERROR: prod 只能从 master/main 部署，当前分支是 '$BRANCH'"
                  echo "请切换到 master 后再 Run workflow，并选择 environment=prod"
                  exit 1
                  ;;
              esac
              ;;
            dev)
              case "$BRANCH" in
                dev) echo "OK: dev 允许从 $BRANCH 部署" ;;
                *)
                  echo "ERROR: dev 只能从 dev 分支部署，当前分支是 '$BRANCH'"
                  echo "请切换到 dev 后再 Run workflow，并选择 environment=dev"
                  echo "（禁止用 master 代码部署到 lpt-dev，避免环境错配）"
                  exit 1
                  ;;
              esac
              ;;
            *)
              echo "ERROR: 未知 environment=$ENV"
              exit 1
              ;;
          esac

      - name: Checkout code
        run: |
          set -euo pipefail
          git clone "$REPO_URL" .
          git checkout "${{ gitea.sha }}"

      - name: Login to Docker Registry
        run: |
          set -euo pipefail
          USER="${{ secrets.REGISTRY_USERNAME }}"
          PASS="${{ secrets.REGISTRY_PASSWORD }}"
          if [ -z "$USER" ] || [ -z "$PASS" ]; then
            echo "ERROR: REGISTRY_USERNAME / REGISTRY_PASSWORD 未配置或为空"
            echo "请在 Gitea 仓库 Settings → Secrets 中配置后重试"
            exit 1
          fi
          echo "$PASS" | docker login "$REGISTRY" -u "$USER" --password-stdin

      - name: Build & Push Docker image
        run: |
          set -euo pipefail
          ENV="${{ inputs.environment }}"
          if [ "$ENV" = "prod" ]; then
            BUILD_MODE=production
          else
            BUILD_MODE=development
          fi
          TAG="${{ gitea.sha }}-$(date +%s)"
          echo "Building $REGISTRY/$APP:$TAG (BUILD_MODE=$BUILD_MODE, env tag=$ENV)"
          docker build \
            --build-arg "BUILD_MODE=$BUILD_MODE" \
            -t "$REGISTRY/$APP:$TAG" \
            -t "$REGISTRY/$APP:$ENV" .
          docker push "$REGISTRY/$APP:$TAG"
          docker push "$REGISTRY/$APP:$ENV"
          # 持久化 TAG：兼容 Gitea / GitHub Actions；文件兜底避免 env 文件不支持
          if [ -n "${GITHUB_ENV:-}" ]; then
            echo "IMAGE_TAG=$TAG" >> "$GITHUB_ENV"
          fi
          if [ -n "${GITEA_ENV:-}" ]; then
            echo "IMAGE_TAG=$TAG" >> "$GITEA_ENV"
          fi
          echo "$TAG" > image_tag.txt
          if [ -n "${{ runner.temp }}" ]; then
            echo "$TAG" > "${{ runner.temp }}/image_tag.txt" || true
          fi
          echo "IMAGE_TAG=$TAG"

      - name: Setup kubectl
        run: |
          set -euo pipefail
          if [ -z "${{ secrets.KUBECONFIG_B64 }}" ]; then
            echo "ERROR: KUBECONFIG_B64 未配置或为空"
            exit 1
          fi
          curl -sLO "https://dl.k8s.io/release/v1.30.0/bin/linux/amd64/kubectl"
          chmod +x kubectl
          mv kubectl /usr/local/bin/
          echo "${{ secrets.KUBECONFIG_B64 }}" | base64 -d > /tmp/kubeconfig
          kubectl --kubeconfig=/tmp/kubeconfig cluster-info >/dev/null

      - name: Create/Update imagePullSecret
        run: |
          set -euo pipefail
          ENV="${{ inputs.environment }}"
          NS="lpt-$ENV"
          USER="${{ secrets.REGISTRY_USERNAME }}"
          PASS="${{ secrets.REGISTRY_PASSWORD }}"
          if [ -z "$USER" ] || [ -z "$PASS" ]; then
            echo "ERROR: REGISTRY_USERNAME / REGISTRY_PASSWORD 为空，无法创建 regcred"
            exit 1
          fi
          # 确保 namespace 存在
          kubectl --kubeconfig=/tmp/kubeconfig get ns "$NS" >/dev/null 2>&1 \
            || kubectl --kubeconfig=/tmp/kubeconfig create ns "$NS"
          # 删除旧 secret 再重建，避免 type/字段残留
          kubectl --kubeconfig=/tmp/kubeconfig delete secret regcred -n "$NS" --ignore-not-found
          kubectl --kubeconfig=/tmp/kubeconfig create secret docker-registry regcred \
            --docker-server="$REGISTRY" \
            --docker-username="$USER" \
            --docker-password="$PASS" \
            -n "$NS"
          # 校验 .dockerconfigjson 非空
          LEN=$(kubectl --kubeconfig=/tmp/kubeconfig get secret regcred -n "$NS" \
            -o jsonpath='{.data.\.dockerconfigjson}' | wc -c)
          if [ "${LEN// /}" -lt 10 ]; then
            echo "ERROR: regcred 创建后 .dockerconfigjson 异常（len=$LEN）"
            exit 1
          fi
          echo "regcred OK in $NS (dockerconfigjson len≈$LEN)"
          # 强制 Deployment 使用 imagePullSecrets（集群存量可能缺失）
          kubectl --kubeconfig=/tmp/kubeconfig patch deployment "$APP" -n "$NS" \
            --type=strategic \
            -p '{"spec":{"template":{"spec":{"imagePullSecrets":[{"name":"regcred"}]}}}}'
          echo "patched deployment/$APP imagePullSecrets=regcred"

      - name: Deploy to K8s
        run: |
          set -euo pipefail
          ENV="${{ inputs.environment }}"
          NS="lpt-$ENV"
          IMAGE_TAG="${IMAGE_TAG:-}"
          if [ -z "$IMAGE_TAG" ] && [ -f image_tag.txt ]; then
            IMAGE_TAG="$(cat image_tag.txt)"
          fi
          if [ -z "$IMAGE_TAG" ] && [ -f "${{ runner.temp }}/image_tag.txt" ]; then
            IMAGE_TAG="$(cat "${{ runner.temp }}/image_tag.txt")"
          fi
          if [ -z "$IMAGE_TAG" ]; then
            echo "ERROR: IMAGE_TAG 为空，无法部署"
            exit 1
          fi
          # 确认 Deployment 已挂 regcred
          PULL_SECRET=$(kubectl --kubeconfig=/tmp/kubeconfig get deployment "$APP" -n "$NS" \
            -o jsonpath='{.spec.template.spec.imagePullSecrets[0].name}' 2>/dev/null || true)
          if [ "$PULL_SECRET" != "regcred" ]; then
            echo "ERROR: deployment/$APP 未配置 imagePullSecrets=regcred（当前='$PULL_SECRET'）"
            exit 1
          fi
          echo "Deploying $REGISTRY/$APP:$IMAGE_TAG -> namespace $NS"
          kubectl --kubeconfig=/tmp/kubeconfig set image "deployment/$APP" \
            "$APP=$REGISTRY/$APP:$IMAGE_TAG" \
            -n "$NS" --record
          kubectl --kubeconfig=/tmp/kubeconfig rollout status "deployment/$APP" \
            -n "$NS" --timeout=5m

      - name: Debug on failure
        if: failure()
        run: |
          ENV="${{ inputs.environment }}"
          NS="lpt-$ENV"
          echo "=== Deployment Status ==="
          kubectl --kubeconfig=/tmp/kubeconfig get deployment "$APP" -n "$NS" -o wide || true
          echo ""
          echo "=== imagePullSecrets on Deployment ==="
          kubectl --kubeconfig=/tmp/kubeconfig get deployment "$APP" -n "$NS" \
            -o jsonpath='{.spec.template.spec.imagePullSecrets}' || true
          echo ""
          echo "=== regcred secret ==="
          kubectl --kubeconfig=/tmp/kubeconfig get secret regcred -n "$NS" -o yaml 2>&1 | head -20 || true
          echo ""
          echo "=== Pod Status ==="
          kubectl --kubeconfig=/tmp/kubeconfig get pods -n "$NS" -l "app=$APP" || true
          echo ""
          echo "=== Recent Events ==="
          kubectl --kubeconfig=/tmp/kubeconfig get events -n "$NS" --sort-by='.lastTimestamp' | tail -20 || true
          echo ""
          echo "=== Pod Describe (latest) ==="
          POD=$(kubectl --kubeconfig=/tmp/kubeconfig get pods -n "$NS" -l "app=$APP" --sort-by=.metadata.creationTimestamp -o jsonpath='{.items[-1].metadata.name}' 2>/dev/null || true)
          if [ -n "${POD:-}" ]; then
            kubectl --kubeconfig=/tmp/kubeconfig describe pod "$POD" -n "$NS" || true
            echo ""
            echo "=== Pod Logs (latest) ==="
            kubectl --kubeconfig=/tmp/kubeconfig logs "$POD" -n "$NS" --tail=50 || true
          fi

      - name: Rollback on failure
        if: failure()
        run: |
          set -euo pipefail
          ENV="${{ inputs.environment }}"
          kubectl --kubeconfig=/tmp/kubeconfig rollout undo "deployment/$APP" -n "lpt-$ENV" || true
          kubectl --kubeconfig=/tmp/kubeconfig rollout status "deployment/$APP" -n "lpt-$ENV" || true