name: Deploy to Cloudflare Pages (cobalt)

on:
  push:
    branches: ["main", "master"]
  workflow_dispatch: {}

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    env:
      CF_PAGES_PROJECT: ${{ vars.CF_PAGES_PROJECT }} # 例: blog
      PROD_BRANCH: "main" # Pages 側の本番ブランチ名
      CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
      CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
      CI: "1"

    steps:
      - name: Checkout
        uses: https://github.com/actions/checkout@v4

      - name: Install cobalt (prebuilt via eget)
        shell: bash
        run: |
          set -euo pipefail
          apt-get update && apt-get install -y ca-certificates curl tar git
          curl -fsSL https://zyedidia.github.io/eget.sh | sh
          ./eget cobalt-org/cobalt.rs --to /usr/local/bin/cobalt
          cobalt --version

      - name: Build site with cobalt
        run: cobalt build # 既定出力: ./_site

      - name: Compute BRANCH_NAME and COMMIT metadata
        id: meta
        shell: bash
        run: |
          bn="${GITHUB_REF_NAME:-${GITEA_REF_NAME:-}}"
          if [ -z "$bn" ]; then bn="$(git rev-parse --abbrev-ref HEAD)"; fi
          echo "BRANCH_NAME=$bn" >> "$GITHUB_ENV"
          echo "COMMIT_SHA=$(git rev-parse HEAD)" >> "$GITHUB_ENV"
          echo "COMMIT_MSG=$(git log -1 --pretty=%s)" >> "$GITHUB_ENV"

      - name: Ensure Pages project exists (create if missing)
        shell: bash
        run: |
          set -euo pipefail
          test -n "${CF_PAGES_PROJECT}"
          code=$(curl -sS -o /dev/null -w '%{http_code}' \
            -H "Authorization: Bearer ${CLOUDFLARE_API_TOKEN}" \
            "https://api.cloudflare.com/client/v4/accounts/${CLOUDFLARE_ACCOUNT_ID}/pages/projects/${CF_PAGES_PROJECT}")
          if [ "$code" != "200" ]; then
            npx --yes wrangler@latest pages project create "${CF_PAGES_PROJECT}" --production-branch "${PROD_BRANCH}"
          fi
        # APIで存在確認 → なければ非対話で作成。:contentReference[oaicite:4]{index=4}

      - name: Deploy to Cloudflare Pages
        shell: bash
        run: |
          npx --yes wrangler@latest pages deploy "_site" \
            --project-name "${CF_PAGES_PROJECT}" \
            --branch "${BRANCH_NAME}" \
            --commit-hash "${COMMIT_SHA}" \
            --commit-message "${COMMIT_MSG}"
        # 公式手順に準拠。ブランチ明示で本番/プレビューを制御。:contentReference[oaicite:5]{index=5}