#!/usr/bin/env bash
set -euo pipefail

# Environment variables (can be passed via docker-compose)
: "${GIT_REPO:?You must set GIT_REPO environment variable}"
GIT_BRANCH="${GIT_BRANCH:-main}"
WEBHOOK_SECRET="${WEBHOOK_SECRET:-}"
WEBHOOK_PORT="${WEBHOOK_PORT:-9000}"
HUGO_FLAGS="${HUGO_FLAGS:-}"
HUGO_BASEURL="${HUGO_BASEURL:-http://localhost:1313}"
REPO_DIR="/app/site"
HOOKS_FILE="/app/hooks.json"
WEBHOOK_BIN="/usr/local/bin/webhook"

# Clone repo into volume if missing
if [ ! -d "$REPO_DIR/.git" ]; then
  echo "Cloning $GIT_REPO (branch $GIT_BRANCH) into $REPO_DIR"
  git clone --branch "$GIT_BRANCH" --single-branch --recursive "$GIT_REPO" "$REPO_DIR"
else
  echo "Repository already exists at $REPO_DIR"
fi

# Ensure working tree matches origin branch
git -C "$REPO_DIR" fetch origin "$GIT_BRANCH" || true
git -C "$REPO_DIR" reset --hard "origin/$GIT_BRANCH" || true

# Generate hooks.json for adnanh/webhook with secret and trigger rule for branch
cat > "$HOOKS_FILE" <<EOF
[
  {
    "id": "update-site",
    "execute-command": "/app/hooks/update_site.sh",
    "command-working-directory": "/app",
    "response-message": "Update started",
    "trigger-rule": {
      "and": [
        {
          "match": {
            "type": "value",
            "value": "refs/heads/${GIT_BRANCH}",
            "parameter": {
              "source": "payload",
              "name": "ref"
            }
          }
        }
      ]
    },
    "pass-arguments-to-command": [
      {
        "source": "payload",
        "name": "ref"
      }
    ]
    $( [ -n "$WEBHOOK_SECRET" ] && echo ",\"secret\": \"$WEBHOOK_SECRET\"" || echo "" )
  }
]
EOF

echo "Created webhook hooks file at $HOOKS_FILE (branch filter: $GIT_BRANCH)"

# Start webhook in background
echo "Starting adnanh/webhook on port $WEBHOOK_PORT"
# run webhook with hooks file and allow hotreload (good for changing hooks.json via entrypoint)
$WEBHOOK_BIN -hooks "$HOOKS_FILE" -port "$WEBHOOK_PORT" -hotreload &
WEBHOOK_PID=$!

# Start hugo server in foreground (PID 1 for container)
echo "Starting Hugo server, baseURL=$HUGO_BASEURL"
cd "$REPO_DIR"
# bind to 0.0.0.0 so it is reachable outside container
hugo server --bind 0.0.0.0 --baseURL "${HUGO_BASEURL}" ${HUGO_FLAGS}

# If hugo exits, shut down webhook as well
kill "$WEBHOOK_PID" 2>/dev/null || true
wait "$WEBHOOK_PID" 2>/dev/null || true