name: CD / GCP

on:
  workflow_run:
    workflows:
      - CI
    types:
      - completed
    branches:
      - main
  workflow_dispatch:
    inputs:
      environment:
        description: 'Target environment'
        required: true
        default: 'prod'
        type: choice
        options:
          - prod
      ref:
        description: 'Git ref to deploy (branch, tag, or SHA)'
        required: true
        default: 'main'

permissions:
  contents: read
  id-token: write

concurrency:
  group: cd-${{ github.event_name == 'workflow_dispatch' && inputs.environment || github.ref_name }}
  cancel-in-progress: false

jobs:
  detect-environment:
    name: Detect environment
    runs-on: ubuntu-latest
    outputs:
      target_env: ${{ steps.detect.outputs.target_env }}
      github_environment: ${{ steps.detect.outputs.github_environment }}
      db_schema: ${{ steps.detect.outputs.db_schema }}
      service_suffix: ${{ steps.detect.outputs.service_suffix }}
      ref: ${{ steps.detect.outputs.ref }}

    steps:
      - name: Determine target environment
        id: detect
        run: |
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            target_env="${{ inputs.environment }}"
            ref="${{ inputs.ref }}"
          else
            target_env="prod"
            ref="${{ github.event.workflow_run.head_sha }}"
          fi

          github_environment="Production"
          db_schema="public"
          service_suffix="prod"

          echo "target_env=$target_env"         >> "$GITHUB_OUTPUT"
          echo "github_environment=$github_environment" >> "$GITHUB_OUTPUT"
          echo "db_schema=$db_schema"           >> "$GITHUB_OUTPUT"
          echo "service_suffix=$service_suffix" >> "$GITHUB_OUTPUT"
          echo "ref=$ref"                       >> "$GITHUB_OUTPUT"

          echo "Target environment: $target_env"
          echo "GitHub Environment: $github_environment"
          echo "DB Schema: $db_schema"
          echo "Service Suffix: $service_suffix"
          echo "Deploy ref: $ref"

  check-secrets:
    name: Check deploy prerequisites
    runs-on: ubuntu-latest
    needs: detect-environment
    environment: ${{ needs.detect-environment.outputs.github_environment }}
    outputs:
      eligible_event: ${{ steps.check.outputs.eligible_event }}
      secrets_ok: ${{ steps.check.outputs.secrets_ok }}
      db_secret_ok: ${{ steps.check.outputs.db_secret_ok }}

    steps:
      - name: Evaluate trigger and required secrets
        id: check
        env:
          GCP_PROJECT_ID: ${{ vars.GCP_PROJECT_ID }}
          GCP_WORKLOAD_IDENTITY_PROVIDER: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
          GCP_SERVICE_ACCOUNT: ${{ vars.GCP_SERVICE_ACCOUNT }}
          DATABASE_URL: ${{ secrets.DATABASE_URL }}
        run: |
          eligible_event=false
          if [[ "${{ github.event_name }}" == "workflow_dispatch" ]]; then
            eligible_event=true
          elif [[ "${{ github.event_name }}" == "workflow_run" && "${{ github.event.workflow_run.conclusion }}" == "success" ]]; then
            eligible_event=true
          fi

          vars_ok=false
          if [[ -n "$GCP_PROJECT_ID" && -n "$GCP_WORKLOAD_IDENTITY_PROVIDER" && -n "$GCP_SERVICE_ACCOUNT" ]]; then
            vars_ok=true
          fi

          db_secret_ok=false
          if [[ -n "$DATABASE_URL" ]]; then
            db_secret_ok=true
          fi

          echo "eligible_event=$eligible_event" >> "$GITHUB_OUTPUT"
          echo "secrets_ok=$vars_ok"            >> "$GITHUB_OUTPUT"
          echo "db_secret_ok=$db_secret_ok"     >> "$GITHUB_OUTPUT"

  images:
    name: Docker / build & push
    runs-on: ubuntu-latest
    needs: [detect-environment, check-secrets]
    timeout-minutes: 30
    if: ${{ needs.check-secrets.outputs.eligible_event == 'true' && needs.check-secrets.outputs.secrets_ok == 'true' && needs.check-secrets.outputs.db_secret_ok == 'true' && needs.detect-environment.outputs.target_env == 'prod' }}
    environment: Production
    strategy:
      fail-fast: false
      matrix:
        service:
          - bot
          - miniapp
    steps:
      - name: Checkout deployment ref
        uses: actions/checkout@v4
        with:
          ref: ${{ needs.detect-environment.outputs.ref }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Authenticate to Google Cloud
        uses: google-github-actions/auth@v2
        with:
          workload_identity_provider: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
          service_account: ${{ vars.GCP_SERVICE_ACCOUNT }}

      - name: Configure Artifact Registry auth
        run: |
          gcloud auth configure-docker "${{ vars.GCP_REGION || 'europe-west1' }}-docker.pkg.dev" --quiet

      - name: Resolve image name
        id: image
        env:
          GCP_REGION: ${{ vars.GCP_REGION || 'europe-west1' }}
          ARTIFACT_REPOSITORY: ${{ vars.ARTIFACT_REPOSITORY || 'household-bot' }}
        run: |
          repo="${GCP_REGION}-docker.pkg.dev/${{ vars.GCP_PROJECT_ID }}/${ARTIFACT_REPOSITORY}"
          echo "name=${repo}/${{ matrix.service }}:latest" >> "$GITHUB_OUTPUT"

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: apps/${{ matrix.service }}/Dockerfile
          push: true
          tags: ${{ steps.image.outputs.name }}
          platforms: linux/amd64
          provenance: false

  deploy:
    name: Deploy Cloud Run
    runs-on: ubuntu-latest
    needs: [detect-environment, check-secrets, images]
    timeout-minutes: 30
    if: ${{ needs.check-secrets.outputs.eligible_event == 'true' && needs.check-secrets.outputs.secrets_ok == 'true' && needs.check-secrets.outputs.db_secret_ok == 'true' && needs.detect-environment.outputs.target_env == 'prod' }}
    environment: ${{ needs.detect-environment.outputs.github_environment }}
    env:
      GCP_REGION: ${{ vars.GCP_REGION || 'europe-west1' }}
      ARTIFACT_REPOSITORY: ${{ vars.ARTIFACT_REPOSITORY || 'household-bot' }}
      SERVICE_SUFFIX: ${{ needs.detect-environment.outputs.service_suffix }}
      DB_SCHEMA: ${{ needs.detect-environment.outputs.db_schema }}
      BOT_SECRET_ID: ${{ vars.TELEGRAM_BOT_TOKEN_SECRET_ID }}

    steps:
      - name: Checkout deployment ref
        uses: actions/checkout@v4
        with:
          ref: ${{ needs.detect-environment.outputs.ref }}

      - name: Setup Bun
        uses: oven-sh/setup-bun@v2
        with:
          bun-version-file: .bun-version

      - name: Install dependencies
        run: bun install --frozen-lockfile

      - name: Authenticate to Google Cloud
        uses: google-github-actions/auth@v2
        with:
          workload_identity_provider: ${{ vars.GCP_WORKLOAD_IDENTITY_PROVIDER }}
          service_account: ${{ vars.GCP_SERVICE_ACCOUNT }}

      - name: Run database migrations
        env:
          DATABASE_URL: ${{ secrets.DATABASE_URL }}
          DB_SCHEMA: ${{ needs.detect-environment.outputs.db_schema }}
        run: bun run db:migrate

      - name: Setup gcloud
        uses: google-github-actions/setup-gcloud@v2

      - name: Resolve image tags
        id: images
        run: |
          repo="${GCP_REGION}-docker.pkg.dev/${{ vars.GCP_PROJECT_ID }}/${ARTIFACT_REPOSITORY}"
          echo "bot_image=${repo}/bot:latest"       >> "$GITHUB_OUTPUT"
          echo "mini_image=${repo}/miniapp:latest"  >> "$GITHUB_OUTPUT"

      - name: Load Telegram bot token for command sync
        id: telegram-token
        run: |
          set +e
          token="$(gcloud secrets versions access latest \
            --secret "${BOT_SECRET_ID}" \
            --project "${{ vars.GCP_PROJECT_ID }}" 2>/dev/null)"
          status=$?
          set -e

          if [[ $status -ne 0 || -z "$token" ]]; then
            echo "available=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "::add-mask::$token"
          {
            echo "available=true"
            echo "token<<EOF"
            echo "$token"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Deploy bot service
        id: bot-api
        run: |
          gcloud run deploy "household-${SERVICE_SUFFIX}-bot-api" \
            --image "${{ steps.images.outputs.bot_image }}" \
            --region "${GCP_REGION}" \
            --project "${{ vars.GCP_PROJECT_ID }}" \
            --set-env-vars "DB_SCHEMA=${DB_SCHEMA},MINI_APP_URL=${{ vars.MINI_APP_URL }}" \
            --allow-unauthenticated \
            --quiet

          echo "url=$(gcloud run services describe "household-${SERVICE_SUFFIX}-bot-api" --region "${GCP_REGION}" --project "${{ vars.GCP_PROJECT_ID }}" --format 'value(status.url)')" >> "$GITHUB_OUTPUT"

      - name: Route traffic to latest bot revision
        run: |
          gcloud run services update-traffic "household-${SERVICE_SUFFIX}-bot-api" \
            --region "${GCP_REGION}" \
            --project "${{ vars.GCP_PROJECT_ID }}" \
            --to-latest \
            --quiet

      - name: Deploy mini app service
        run: |
          gcloud run deploy "household-${SERVICE_SUFFIX}-mini-app" \
            --image "${{ steps.images.outputs.mini_image }}" \
            --region "${GCP_REGION}" \
            --project "${{ vars.GCP_PROJECT_ID }}" \
            --set-env-vars "BOT_API_URL=${{ steps.bot-api.outputs.url }}" \
            --allow-unauthenticated \
            --quiet

      - name: Route traffic to latest mini app revision
        run: |
          gcloud run services update-traffic "household-${SERVICE_SUFFIX}-mini-app" \
            --region "${GCP_REGION}" \
            --project "${{ vars.GCP_PROJECT_ID }}" \
            --to-latest \
            --quiet

      - name: Sync Telegram commands
        if: ${{ steps.telegram-token.outputs.available == 'true' }}
        env:
          TELEGRAM_BOT_TOKEN: ${{ steps.telegram-token.outputs.token }}
        run: bun run ops:telegram:commands set

      - name: Load webhook secret
        id: webhook-secret
        run: |
          secret_name="telegram-webhook-secret"

          echo "Loading secret: ${secret_name}"
          secret="$(gcloud secrets versions access latest \
            --secret "${secret_name}" \
            --project "${{ vars.GCP_PROJECT_ID }}")"

          echo "::add-mask::$secret"
          echo "secret=${secret}" >> "$GITHUB_OUTPUT"

      - name: Set Telegram Webhook
        if: ${{ !cancelled() && steps.telegram-token.outputs.available == 'true' }}
        env:
          TELEGRAM_BOT_TOKEN: ${{ steps.telegram-token.outputs.token }}
          TELEGRAM_WEBHOOK_SECRET: ${{ steps.webhook-secret.outputs.secret }}
        run: |
          if [[ -z "$TELEGRAM_WEBHOOK_SECRET" ]]; then
            echo "ERROR: TELEGRAM_WEBHOOK_SECRET is not set"
            exit 1
          fi

          SERVICE_URL=$(gcloud run services describe "household-${SERVICE_SUFFIX}-bot-api" \
            --region "${GCP_REGION}" \
            --project "${{ vars.GCP_PROJECT_ID }}" \
            --format 'value(status.url)')

          export TELEGRAM_WEBHOOK_URL="$SERVICE_URL/webhook/telegram"
          echo "Setting webhook to: $TELEGRAM_WEBHOOK_URL"
          bun run ops:telegram:webhook set

      - name: Verify Telegram Webhook
        if: ${{ steps.telegram-token.outputs.available == 'true' }}
        env:
          TELEGRAM_BOT_TOKEN: ${{ steps.telegram-token.outputs.token }}
        run: |
          echo "Checking webhook status..."
          bun run ops:telegram:webhook info | jq -r '.url, .last_error_message' || true