name: Update CDN latest.json

# Assembles yao/latest.json after all platform binaries are on R2.
#
# Normally triggered automatically by notarize-macos.yml's finalize job after
# notarization completes. Can also be triggered manually as a fallback.
#
# Prerequisites: release-linux.yml and release-macos.yml must have uploaded
# all 4 platform binaries to R2.

on:
  workflow_dispatch:
    inputs:
      version:
        description: "Engine version to publish (e.g. 1.0.0 or 1.0.0-alpha)"
        required: true
      mark_latest:
        description: "Also update yao/latest.json (set false for pre-releases you want on CDN but not as latest)"
        required: false
        default: "true"

permissions:
  contents: read

jobs:
  publish-latest:
    runs-on: ubuntu-latest
    env:
      AWS_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
      AWS_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
      R2_ENDPOINTS: ${{ secrets.R2_ENDPOINTS }}
      R2_BUCKET: ${{ secrets.R2_BUCKET || 'releases' }}
      CDN_BASE: https://get.yaoapps.com
    steps:
      - name: Configure AWS CLI
        run: |
          aws configure set default.region us-east-1
          aws configure set default.s3.signature_version s3v4

      - name: Verify platform assets exist
        run: |
          VERSION="${{ github.event.inputs.version }}"
          PREFIX="yao/${VERSION}"

          PLATFORMS=(
            "darwin-arm64"
            "darwin-amd64"
            "linux-amd64"
            "linux-arm64"
          )

          MISSING=0
          for P in "${PLATFORMS[@]}"; do
            KEY="${PREFIX}/yao-${VERSION}-${P}"
            echo "Checking s3://${R2_BUCKET}/${KEY}"
            if ! aws s3 ls "s3://${R2_BUCKET}/${KEY}" --endpoint-url "$R2_ENDPOINTS" >/dev/null 2>&1; then
              echo "::warning::Missing asset: ${KEY}"
              MISSING=$((MISSING+1))
            fi
            if ! aws s3 ls "s3://${R2_BUCKET}/${KEY}.sha256" --endpoint-url "$R2_ENDPOINTS" >/dev/null 2>&1; then
              echo "::warning::Missing sha256: ${KEY}.sha256"
              MISSING=$((MISSING+1))
            fi
          done

          if [ "$MISSING" -gt 0 ]; then
            echo "::error::$MISSING required asset(s) are missing on R2. Run platform CI workflows first."
            exit 1
          fi
          echo "All platform assets verified."

      - name: Build latest.json
        run: |
          VERSION="${{ github.event.inputs.version }}"
          RELEASED_AT="$(date -u +%Y-%m-%dT%H:%M:%SZ)"

          python3 <<PY > /tmp/latest.json
          import json
          version = "${VERSION}"
          base = "${CDN_BASE}/yao/${VERSION}"
          assets = {
              "darwin-arm64": f"{base}/yao-{version}-darwin-arm64",
              "darwin-amd64": f"{base}/yao-{version}-darwin-amd64",
              "linux-amd64":  f"{base}/yao-{version}-linux-amd64",
              "linux-arm64":  f"{base}/yao-{version}-linux-arm64",
          }
          sha256 = {
              "darwin-arm64": f"{base}/yao-{version}-darwin-arm64.sha256",
              "darwin-amd64": f"{base}/yao-{version}-darwin-amd64.sha256",
              "linux-amd64":  f"{base}/yao-{version}-linux-amd64.sha256",
              "linux-arm64":  f"{base}/yao-{version}-linux-arm64.sha256",
          }
          data = {
              "version": version,
              "released_at": "${RELEASED_AT}",
              "assets": assets,
              "sha256": sha256,
          }
          print(json.dumps(data, indent=2, ensure_ascii=False))
          PY

          cat /tmp/latest.json

      - name: Upload versioned latest.json
        run: |
          VERSION="${{ github.event.inputs.version }}"
          aws s3 cp /tmp/latest.json \
            "s3://${R2_BUCKET}/yao/${VERSION}/latest.json" \
            --endpoint-url "$R2_ENDPOINTS" \
            --content-type "application/json" \
            --cache-control "public, max-age=60"

      - name: Promote to yao/latest.json
        if: ${{ github.event.inputs.mark_latest != 'false' }}
        run: |
          aws s3 cp /tmp/latest.json \
            "s3://${R2_BUCKET}/yao/latest.json" \
            --endpoint-url "$R2_ENDPOINTS" \
            --content-type "application/json" \
            --cache-control "public, max-age=60"
          echo "Promoted to yao/latest.json"