name: Prepare Release

on:
  workflow_run:
    workflows: ["Validators (Pushes and Pull Requests)"]
    types: [completed]
  workflow_dispatch:
    inputs:
      version:
        description: 'Release version (auto-generated if empty, e.g. quant_20260711.0.abc1234 for the first deploy that day)'
        required: false
        type: string

env:
  DOTNET_VERSION: '10.0.x'

concurrency:
  group: prepare-release-${{ github.event.workflow_run.head_sha || github.sha }}
  cancel-in-progress: false

jobs:
  upstream-gate:
    name: "Upstream CI Success Gate"
    runs-on: ubuntu-latest
    steps:
      - name: Check CI Pipeline Status
        run: |
          if [ "${{ github.event_name }}" = "workflow_run" ]; then
            if [ "${{ github.event.workflow_run.conclusion }}" != "success" ]; then
              echo "❌ ERROR: CI pipeline failed — release preparation blocked"
              exit 1
            fi
            echo "✓ CI pipeline succeeded — proceeding to release"
          else
            echo "ℹ Release triggered manually — skipping upstream CI check"
          fi

  build-and-release:
    name: Build & Create Release
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    timeout-minutes: 30
    needs: upstream-gate
    outputs:
      version: ${{ steps.metadata.outputs.version }}
      commit: ${{ steps.metadata.outputs.commit }}

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup .NET
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: ${{ env.DOTNET_VERSION }}

      - name: Generate Metadata
        id: metadata
        run: |
          VERSION_INPUT="${{ github.event.inputs.version }}"
          COMMIT=$(git rev-parse --short HEAD)

          # Auto-generate version if not provided
          if [ -z "$VERSION_INPUT" ]; then
            # Simple, reliable version scheme: timestamp + commit hash
            # Avoids unreliable Gitea API calls (network failures, timeouts)
            # Format: vYYYY.MM.DD.HHMMSS.COMMIT
            TIMESTAMP=$(TZ=Asia/Seoul date +%Y.%m.%d.%H%M%S)
            VERSION="v${TIMESTAMP}.${COMMIT}"
          else
            VERSION="$VERSION_INPUT"
          fi

          echo "version=${VERSION}" >> $GITHUB_OUTPUT
          echo "commit=${COMMIT}" >> $GITHUB_OUTPUT
          echo "Version: $VERSION"
          echo "Commit: $COMMIT"

      - name: Restore
        run: |
          dotnet restore src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj

      - name: Build (Release)
        run: |
          dotnet build src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj \
            -c Release \
            --no-restore \
            -p:ContinuousIntegrationBuild=true

      - name: Publish
        run: |
          dotnet publish src/dotnet/QuantEngine.Web/QuantEngine.Web.csproj \
            -c Release \
            -o ./publish \
            --no-restore \
            --no-build

      - name: Write Version Text
        run: |
          echo "${{ steps.metadata.outputs.version }}" > ./publish/version.txt

      - name: Write Production Config
        run: |
          mkdir -p ./publish
          VERSION="${{ steps.metadata.outputs.version }}"
          python3 -c '
          import json
          import pathlib

          # NOTE: No ConnectionStrings here on purpose. The real DB
          # password lives only in /home/kjh2064/.config/quantengine.env
          # on the production server and is injected via systemd
          # EnvironmentFile (ConnectionStrings__DefaultConnection),
          # which overrides this file at runtime. Never bake secrets
          # into a build artifact that ends up in a Gitea Release.
          config = {
            "Logging": {
              "LogLevel": {
                "Default": "Information"
              }
            },
            "AppVersion": "'$VERSION'"
          }

          pathlib.Path("./publish/appsettings.Production.json").write_text(
            json.dumps(config, ensure_ascii=False, indent=2),
            encoding="utf-8"
          )'

          test -s ./publish/appsettings.Production.json || { echo "ERROR: appsettings.Production.json is empty"; exit 1; }
          echo "✓ Production config created (version: $VERSION)"

      - name: Package Artifact
        run: |
          VERSION="${{ steps.metadata.outputs.version }}"
          ARTIFACT="quantengine_${VERSION}.tar.gz"
          tar -czf "$ARTIFACT" -C ./publish .
          echo "artifact=${ARTIFACT}" >> $GITHUB_OUTPUT
          echo "✓ Package: $(du -sh $ARTIFACT | cut -f1)"
          file "$ARTIFACT"

      - name: Generate Artifact Checksum
        run: |
          VERSION="${{ steps.metadata.outputs.version }}"
          ARTIFACT="quantengine_${VERSION}.tar.gz"
          sha256sum "$ARTIFACT" | awk '{print $1}' > "${ARTIFACT}.sha256"
          echo "✓ Checksum created: ${ARTIFACT}.sha256"
          cat "${ARTIFACT}.sha256"

      - name: Generate Release Manifest
        run: |
          VERSION="${{ steps.metadata.outputs.version }}"
          COMMIT="${{ steps.metadata.outputs.commit }}"
          ARTIFACT="quantengine_${VERSION}.tar.gz"
          CHECKSUM=$(cat "${ARTIFACT}.sha256")
          python3 - <<PY
          import json
          import pathlib

          payload = {
              "version": "${VERSION}",
              "commit": "${COMMIT}",
              "artifact": "${ARTIFACT}",
              "sha256": "${CHECKSUM}",
          }
          pathlib.Path("${ARTIFACT}.manifest.json").write_text(
              json.dumps(payload, ensure_ascii=False, indent=2),
              encoding="utf-8",
          )
          PY
          echo "✓ Manifest created"

      - name: Validate Release Manifest
        run: |
          ARTIFACT="quantengine_${{ steps.metadata.outputs.version }}.tar.gz"
          MANIFEST="${ARTIFACT}.manifest.json"

          python3 - <<PY
          import json
          import sys
          import pathlib

          try:
              data = json.loads(pathlib.Path("${MANIFEST}").read_text(encoding="utf-8"))

              required_fields = ["version", "commit", "artifact", "sha256"]
              for field in required_fields:
                  if field not in data or not data[field]:
                      print(f"ERROR: Manifest missing or empty '{field}'")
                      sys.exit(1)

              print(f"✓ Manifest validated: {data['version']}")
          except Exception as e:
              print(f"ERROR: {e}")
              sys.exit(1)
          PY

      - name: Create Git Tag
        run: |
          VERSION="${{ steps.metadata.outputs.version }}"
          COMMIT="${{ steps.metadata.outputs.commit }}"

          git config user.name "Gitea Actions"
          git config user.email "actions@gitea.local"

          git tag -a "$VERSION" -m "Release $VERSION (commit: $COMMIT)" HEAD
          echo "✓ Local tag created: $VERSION"

          git push origin "$VERSION"
          echo "✓ Tag pushed: $VERSION"

      - name: Create Gitea Release
        env:
          VERSION: ${{ steps.metadata.outputs.version }}
          COMMIT: ${{ steps.metadata.outputs.commit }}
          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
        run: |
          ARTIFACT="quantengine_${VERSION}.tar.gz"
          API="https://gitea.taxbaik.com/api/v1"
          REPO="kjh2064/QuantEngineByItz"

          test -s "$ARTIFACT" || { echo "ERROR: artifact missing: $ARTIFACT"; exit 1; }

          echo "Creating release $VERSION via Gitea API..."
          RELEASE_JSON=$(curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            -d "{\"tag_name\":\"${VERSION}\",\"name\":\"Release ${VERSION}\",\"body\":\"Release Version: ${VERSION} | Commit: ${COMMIT}\",\"target_commitish\":\"main\"}" \
            "${API}/repos/${REPO}/releases")

          RELEASE_ID=$(echo "$RELEASE_JSON" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")

          if [ -z "$RELEASE_ID" ] || [ "$RELEASE_ID" = "null" ]; then
            echo "ERROR: Failed to create release"
            echo "$RELEASE_JSON"
            exit 1
          fi

          echo "✓ Release created: $VERSION (id: $RELEASE_ID)"

          echo "Uploading artifact..."
          curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: multipart/form-data" \
            -F "attachment=@${ARTIFACT}" \
            "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${ARTIFACT}" \
            -o /dev/null

          echo "✓ Artifact attached: $ARTIFACT"

          echo "Uploading checksum..."
          curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: multipart/form-data" \
            -F "attachment=@${ARTIFACT}.sha256" \
            "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${ARTIFACT}.sha256" \
            -o /dev/null

          echo "✓ Checksum attached: ${ARTIFACT}.sha256"

          echo "Uploading manifest..."
          curl -sf -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: multipart/form-data" \
            -F "attachment=@${ARTIFACT}.manifest.json" \
            "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${ARTIFACT}.manifest.json" \
            -o /dev/null

          echo "✓ Manifest attached: ${ARTIFACT}.manifest.json"

  notification:
    name: Release Notification
    runs-on: ubuntu-latest
    if: always()
    needs: [upstream-gate, build-and-release]

    steps:
      - name: Notify Release Ready
        if: needs.build-and-release.result == 'success'
        run: |
          echo "════════════════════════════════════════"
          echo "✅ Release Ready for Deployment"
          echo "════════════════════════════════════════"
          echo "Version: ${{ needs.build-and-release.outputs.version }}"
          echo "Commit: ${{ needs.build-and-release.outputs.commit }}"
          echo ""
          echo "Next: Use deploy-prod.yml to deploy this release"
          echo "════════════════════════════════════════"