name: Build and Deploy

on:
  push:
    branches: [main]
    tags: ["v*"]
  workflow_dispatch:

env:
  REGISTRY: git.k2patel.in
  IMAGE_NAME: k2patel/apcupsd-client
  HELM_RELEASE: apcupsd-client
  HELM_NAMESPACE: apcupsd
  CHART_PATH: ./chart
  IMAGE_PULL_SECRET: gitea-registry

jobs:
  build-and-deploy:
    runs-on: docker
    steps:
      - name: Checkout
        shell: bash
        run: |
          git init .
          mkdir -p ~/.ssh
          chmod 700 ~/.ssh
          ssh-keyscan -p 2222 git.k2patel.in >> ~/.ssh/known_hosts
          chmod 600 ~/.ssh/known_hosts
          git remote add origin "ssh://git@git.k2patel.in:2222/k2patel/apcupsd-client.git"
          git -c protocol.version=2 fetch --no-tags --prune --depth=1 origin +refs/heads/main:refs/remotes/origin/main
          git checkout --force refs/remotes/origin/main

      - name: Determine image tag
        id: tag
        shell: bash
        run: |
          if [[ "${{ gitea.ref }}" == refs/tags/v* ]]; then
            echo "tag=${{ gitea.ref_name }}" >> "$GITHUB_OUTPUT"
          else
            echo "tag=$(printf '%s' '${{ gitea.sha }}' | cut -c1-12)" >> "$GITHUB_OUTPUT"
          fi

      - name: Login to Gitea registry
        shell: bash
        run: |
          echo "${{ secrets.CONTAINER_TOKEN }}" | docker login "${{ env.REGISTRY }}" \
            --username "${{ vars.CONTAINER_USER }}" \
            --password-stdin

      - name: Build image
        shell: bash
        run: |
          docker build \
            -t "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}" \
            -t "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest" \
            .

      - name: Push image
        shell: bash
        run: |
          docker push "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}"
          docker push "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest"

      - name: Install Kubernetes tools
        shell: bash
        run: |
          curl -fsSL -o kubectl "https://dl.k8s.io/release/$(curl -fsSL https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl"
          chmod +x kubectl
          sudo mv kubectl /usr/local/bin/
          curl -fsSL https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | bash

      - name: Deploy Helm chart
        shell: bash
        env:
          KUBECONFIG_DATA: ${{ secrets.KUBECONFIG_DATA }}
          CONTAINER_USER: ${{ vars.CONTAINER_USER }}
          CONTAINER_TOKEN: ${{ secrets.CONTAINER_TOKEN }}
        run: |
          if [[ -z "$KUBECONFIG_DATA" ]]; then
            echo "::error::KUBECONFIG_DATA secret is not configured for this repository"
            exit 1
          fi

          if printf '%s' "$KUBECONFIG_DATA" | tr -d '\r\n ' | base64 -d > /tmp/kubeconfig 2>/tmp/kubeconfig-decode.err; then
            echo "Decoded KUBECONFIG_DATA as base64"
          else
            echo "KUBECONFIG_DATA is not base64; using it as raw kubeconfig content"
            printf '%s' "$KUBECONFIG_DATA" > /tmp/kubeconfig
          fi
          chmod 600 /tmp/kubeconfig
          export KUBECONFIG=/tmp/kubeconfig

          kubectl create namespace "$HELM_NAMESPACE" \
            --dry-run=client \
            -o yaml | kubectl apply -f -

          kubectl create secret docker-registry "$IMAGE_PULL_SECRET" \
            --docker-server="$REGISTRY" \
            --docker-username="$CONTAINER_USER" \
            --docker-password="$CONTAINER_TOKEN" \
            --namespace "$HELM_NAMESPACE" \
            --dry-run=client \
            -o yaml | kubectl apply -f -

          if ! helm status "$HELM_RELEASE" --namespace "$HELM_NAMESPACE" >/dev/null 2>&1; then
            echo "::error::Helm release $HELM_RELEASE is not installed. Bootstrap it with chart secrets before enabling automated image deploys."
            exit 1
          fi

          helm upgrade "$HELM_RELEASE" "$CHART_PATH" \
            --namespace "$HELM_NAMESPACE" \
            --reuse-values \
            --set app.image="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.tag.outputs.tag }}" \
            --set app.imagePullPolicy=IfNotPresent \
            --set "app.imagePullSecrets[0].name=$IMAGE_PULL_SECRET"
          rm -f /tmp/kubeconfig