name: 🚀 Deploy Backend — All Platforms

on:
  push:
    branches: [main]
    paths:
      - 'opengrammar/backend/**'
      - '.github/workflows/deploy-backend.yml'
  workflow_dispatch:
    inputs:
      platform:
        description: 'Deploy to specific platform (leave empty for all)'
        required: false
        default: 'all'
        type: choice
        options:
          - all
          - cloudflare
          - vercel
          - netlify
          - deno
          - docker

concurrency:
  group: deploy-backend-${{ github.ref }}
  cancel-in-progress: false

jobs:
  # ─────────────────────────────────────────────────────────────────────────────
  # 1. Type-check before any deployment
  # ─────────────────────────────────────────────────────────────────────────────
  typecheck:
    name: ✅ Type Check
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest
      - name: Install dependencies
        run: cd opengrammar/backend && bun install
      - name: TypeScript check
        run: cd opengrammar/backend && npx tsc --noEmit

  # ─────────────────────────────────────────────────────────────────────────────
  # 2. Cloudflare Workers
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-cloudflare:
    name: ☁️ Deploy → Cloudflare Workers
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'cloudflare')
      || github.event_name == 'push'
    environment:
      name: cloudflare
      url: https://opengrammar-backend-production.thelabrats-dev.workers.dev
    steps:
      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest
      - name: Install dependencies
        run: cd opengrammar/backend && bun install
      - name: Deploy to Cloudflare Workers
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
          workingDirectory: opengrammar/backend
          command: deploy --env production

  # ─────────────────────────────────────────────────────────────────────────────
  # 3. Vercel
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-vercel:
    name: △ Deploy → Vercel
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'vercel')
      || github.event_name == 'push'
    environment:
      name: vercel
      url: https://opengrammar-backend-psi.vercel.app
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - name: Install Vercel CLI
        run: npm install -g vercel
      - name: Deploy to Vercel
        run: |
          cd opengrammar/backend
          rm -rf .vercel
          vercel pull --yes --environment=production --token=${{ secrets.VERCEL_TOKEN }}
          vercel build --prod --token=${{ secrets.VERCEL_TOKEN }}
          vercel deploy --prebuilt --prod --token=${{ secrets.VERCEL_TOKEN }}
        env:
          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}

  # ─────────────────────────────────────────────────────────────────────────────
  # 4. Netlify
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-netlify:
    name: 🟩 Deploy → Netlify
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'netlify')
      || github.event_name == 'push'
    environment:
      name: netlify
      url: https://opengrammar-backend.netlify.app
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
      - name: Install dependencies
        run: cd opengrammar/backend && npm install
      - name: Install Netlify CLI
        run: npm install -g netlify-cli
      - name: Deploy to Netlify
        run: |
          cd opengrammar/backend
          netlify deploy --prod --dir=. --functions=netlify/functions \
            --auth=${{ secrets.NETLIFY_AUTH_TOKEN }} \
            --site=${{ secrets.NETLIFY_SITE_ID }}

  # ─────────────────────────────────────────────────────────────────────────────
  # 5. Deno Deploy
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-deno:
    name: 🦕 Deploy → Deno Deploy
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'deno')
      || github.event_name == 'push'
    permissions:
      id-token: write
      contents: read
    environment:
      name: deno
      url: https://opengrammar-backend.deno.dev
    steps:
      - uses: actions/checkout@v4
      - name: Deploy to Deno Deploy
        uses: denoland/deployctl@v1
        with:
          project: opengrammar-backend
          entrypoint: opengrammar/backend/server-deno.ts
          root: .
        env:
          DENO_DEPLOY_TOKEN: ${{ secrets.DENO_DEPLOY_TOKEN }}

  # ─────────────────────────────────────────────────────────────────────────────
  # 6. Docker Hub
  # ─────────────────────────────────────────────────────────────────────────────
  deploy-docker:
    name: 🐳 Publish → Docker Hub
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'docker')
      || github.event_name == 'push'
    steps:
      - uses: actions/checkout@v4
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ secrets.DOCKERHUB_USERNAME }}/opengrammar-backend
          tags: |
            type=raw,value=latest
            type=sha,prefix=sha-
            type=raw,value=2.0.0
      - name: Build and push (multi-arch)
        uses: docker/build-push-action@v5
        with:
          context: ./opengrammar/backend
          file: ./opengrammar/backend/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  # ─────────────────────────────────────────────────────────────────────────────
  # 7. npm Registry
  # ─────────────────────────────────────────────────────────────────────────────
  publish-npm:
    name: 📦 Publish → npm
    runs-on: ubuntu-latest
    needs: typecheck
    if: >
      github.event_name == 'workflow_dispatch' &&
      (github.event.inputs.platform == 'all' || github.event.inputs.platform == 'docker')
      || github.event_name == 'push'
    steps:
      - uses: actions/checkout@v4
      - uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          registry-url: 'https://registry.npmjs.org'
      - name: Install dependencies
        run: cd opengrammar/backend && bun install
      - name: Build bundle
        run: cd opengrammar/backend && bun build server.ts --outdir dist --target node --format esm
      - name: Publish to npm
        run: |
          cd opengrammar/backend
          # Bump patch version based on commit SHA to avoid duplicate version errors
          node -e "
            const fs = require('fs');
            const pkg = JSON.parse(fs.readFileSync('package.json'));
            const sha = process.env.GITHUB_SHA?.slice(0,7) || 'dev';
            pkg.version = pkg.version.replace(/\\.\\d+$/, '') + '.' + Date.now().toString().slice(-6);
            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2));
            console.log('Publishing version:', pkg.version);
          "
          npm publish --access public
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

  # ─────────────────────────────────────────────────────────────────────────────
  # 8. Summary
  # ─────────────────────────────────────────────────────────────────────────────
  summary:
    name: 📋 Deployment Summary
    runs-on: ubuntu-latest
    needs:
      - deploy-cloudflare
      - deploy-vercel
      - deploy-netlify
      - deploy-deno
      - deploy-docker
      - publish-npm
    if: always()
    steps:
      - name: Generate summary
        run: |
          echo "## 🚀 Deployment Results" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "| Platform | Status |" >> $GITHUB_STEP_SUMMARY
          echo "|---|---|" >> $GITHUB_STEP_SUMMARY
          echo "| ☁️ Cloudflare Workers | ${{ needs.deploy-cloudflare.result == 'success' && '✅ Deployed' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
          echo "| △ Vercel | ${{ needs.deploy-vercel.result == 'success' && '✅ Deployed' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
          echo "| 🟩 Netlify | ${{ needs.deploy-netlify.result == 'success' && '✅ Deployed' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
          echo "| 🦕 Deno Deploy | ${{ needs.deploy-deno.result == 'success' && '✅ Deployed' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
          echo "| 🐳 Docker Hub | ${{ needs.deploy-docker.result == 'success' && '✅ Published' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
          echo "" >> $GITHUB_STEP_SUMMARY
          echo "Commit: \`${{ github.sha }}\`" >> $GITHUB_STEP_SUMMARY