name: Build and deploy

on:
  push:
    branches: [main, staging, devel]
  workflow_dispatch: {}

jobs:
  build-and-deploy:
    runs-on: self-hosted
    container: python:3.12-slim
    steps:
      - name: Install system dependencies
        run: |
          apt-get update
          apt-get install -y --no-install-recommends git rsync openssh-client nodejs

      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: false

      - name: Set up SSH key and pinned host keys
        # Same key used both as the theme repo's deploy key (Gitea) and for
        # the webserver login (below) — one secret, two authorized_keys entries.
        # Host keys are pinned via a var (known_hosts-format lines, pasted
        # directly from a known_hosts file that already trusts both hosts)
        # rather than fetched via ssh-keyscan — no extra network calls, no
        # TOFU, and no risk of tripping aquaria's connection-rate limiting.
        # KNOWN_HOSTS is shared between prod/test (just more lines in the
        # same blob); the deploy key itself picks PROD_/TEST_ by branch,
        # each falling back to the generic DEPLOY_SSH_KEY if unset.
        env:
          REF_NAME: ${{ github.ref_name }}
          PROD_DEPLOY_SSH_KEY: ${{ secrets.PROD_DEPLOY_SSH_KEY }}
          TEST_DEPLOY_SSH_KEY: ${{ secrets.TEST_DEPLOY_SSH_KEY }}
          DEPLOY_SSH_KEY: ${{ secrets.DEPLOY_SSH_KEY }}
          KNOWN_HOSTS: ${{ vars.KNOWN_HOSTS }}
        run: |
          if [ "$REF_NAME" = "main" ]; then
            KEY="${PROD_DEPLOY_SSH_KEY:-$DEPLOY_SSH_KEY}"
          else
            KEY="${TEST_DEPLOY_SSH_KEY:-$DEPLOY_SSH_KEY}"
          fi
          mkdir -p ~/.ssh
          printf '%s\n' "$KEY" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          printf '%s\n' "$KNOWN_HOSTS" >> ~/.ssh/known_hosts

      - name: Fetch theme submodule
        run: |
          GIT_SSH_COMMAND="ssh -4 -i ~/.ssh/deploy_key -o StrictHostKeyChecking=yes" \
            git submodule update --init --recursive

      - name: Install Python dependencies
        run: pip install --no-cache-dir -r requirements.txt

      - name: Build site
        # main -> real prod config; staging -> prod-like preview (feeds,
        # absolute URLs) pointed at the dev webserver; devel (or anything
        # else) -> bare pelicanconf.py, same as a plain local build.
        # SITE_COMMIT/SITE_BRANCH are picked up by pelicanconf.py (and thus
        # every config that imports it) for the footer build-info line.
        env:
          REF_NAME: ${{ github.ref_name }}
          GITEA_SHA: ${{ github.sha }}
        run: |
          export SITE_COMMIT=$(echo "$GITEA_SHA" | cut -c1-8)
          export SITE_BRANCH="$REF_NAME"
          if [ "$REF_NAME" = "main" ]; then
            pelican -s publishconf.py
          elif [ "$REF_NAME" = "staging" ]; then
            pelican -s stagingconf.py
          else
            pelican
          fi

      - name: Deploy via rsync
        # main -> production, anything else (i.e. devel/staging) -> test. Host is
        # required per-target (no generic fallback); port/path/user each
        # fall back to a shared generic var/secret, then (port only) 22.
        env:
          REF_NAME: ${{ github.ref_name }}
          PROD_DEPLOY_HOST: ${{ vars.PROD_DEPLOY_HOST }}
          TEST_DEPLOY_HOST: ${{ vars.TEST_DEPLOY_HOST }}
          PROD_DEPLOY_PORT: ${{ vars.PROD_DEPLOY_PORT }}
          TEST_DEPLOY_PORT: ${{ vars.TEST_DEPLOY_PORT }}
          DEPLOY_PORT: ${{ vars.DEPLOY_PORT }}
          PROD_DEPLOY_PATH: ${{ vars.PROD_DEPLOY_PATH }}
          TEST_DEPLOY_PATH: ${{ vars.TEST_DEPLOY_PATH }}
          DEPLOY_PATH: ${{ vars.DEPLOY_PATH }}
          PROD_DEPLOY_USER: ${{ secrets.PROD_DEPLOY_USER }}
          TEST_DEPLOY_USER: ${{ secrets.TEST_DEPLOY_USER }}
          DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
        run: |
          if [ "$REF_NAME" = "main" ]; then
            HOST="$PROD_DEPLOY_HOST"
            PORT="${PROD_DEPLOY_PORT:-$DEPLOY_PORT}"
            DPATH="${PROD_DEPLOY_PATH:-$DEPLOY_PATH}"
            USER_="${PROD_DEPLOY_USER:-$DEPLOY_USER}"
          else
            HOST="$TEST_DEPLOY_HOST"
            PORT="${TEST_DEPLOY_PORT:-$DEPLOY_PORT}"
            DPATH="${TEST_DEPLOY_PATH:-$DEPLOY_PATH}"
            USER_="${TEST_DEPLOY_USER:-$DEPLOY_USER}"
          fi
          echo "Deploying $REF_NAME -> $HOST"
          rsync -avz --delete \
            -e "ssh -4 -i ~/.ssh/deploy_key -p ${PORT:-22} -o StrictHostKeyChecking=yes" \
            output/ "${USER_}@${HOST}:${DPATH}"