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

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
ENV_FILE="${ENV_FILE:-$ROOT_DIR/docker/.env.multisite}"
TARGET_HOST=""
TARGET_DIR=""
REMOTE_BOOTSTRAP=""
MODE="mirror"

load_env_file() {
  local env_file="$1"
  local line key value

  while IFS= read -r line || [[ -n "$line" ]]; do
    line="${line%$'\r'}"
    [[ -z "$line" || "$line" =~ ^[[:space:]]*# ]] && continue
    [[ "$line" != *=* ]] && continue

    key="${line%%=*}"
    value="${line#*=}"
    export "$key=$value"
  done < "$env_file"
}

usage() {
  cat <<'EOF'
Usage:
  sync_docs_to_53.sh [--env-file /path/to/.env.multisite] [--mode mirror|push]
                    [--target-host michele@192.168.0.53] [--target-dir /var/www/netgescon-docs]

Modes:
  mirror  Update the .53 docs mirror from Gitea using bootstrap_docs_mirror.sh.
  push    Rsync the current local docs and AI scripts to the target dir on .53.
EOF
}

while [[ $# -gt 0 ]]; do
  case "$1" in
    --env-file)
      ENV_FILE="$2"
      shift 2
      ;;
    --mode)
      MODE="$2"
      shift 2
      ;;
    --target-host)
      TARGET_HOST="$2"
      shift 2
      ;;
    --target-dir)
      TARGET_DIR="$2"
      shift 2
      ;;
    -h|--help)
      usage
      exit 0
      ;;
    *)
      echo "Unknown option: $1" >&2
      usage
      exit 1
      ;;
  esac
done

if [[ -f "$ENV_FILE" ]]; then
  load_env_file "$ENV_FILE"
fi

TARGET_HOST="${TARGET_HOST:-${NETGESCON_DOCS_53_SSH:-michele@192.168.0.53}}"
TARGET_DIR="${TARGET_DIR:-${NETGESCON_DOCS_53_DIR:-/var/www/netgescon-docs}}"
REMOTE_BOOTSTRAP="${NETGESCON_DOCS_53_BOOTSTRAP:-~/netgescon/netgescon-day0/scripts/ai/bootstrap_docs_mirror.sh}"

case "$MODE" in
  mirror)
    ssh "$TARGET_HOST" "bash '$REMOTE_BOOTSTRAP' '$TARGET_DIR'"
    ;;
  push)
    rsync -az --delete "$ROOT_DIR/docs/" "$TARGET_HOST:$TARGET_DIR/docs/"
    rsync -az --delete "$ROOT_DIR/scripts/ai/" "$TARGET_HOST:$TARGET_DIR/scripts/ai/"
    rsync -az "$ROOT_DIR/README.md" "$TARGET_HOST:$TARGET_DIR/README.md"
    rsync -az "$ROOT_DIR/CHANGELOG.md" "$TARGET_HOST:$TARGET_DIR/CHANGELOG.md"
    echo "TARGET_HOST=$TARGET_HOST"
    echo "TARGET_DIR=$TARGET_DIR"
    echo "MODE=push"
    ;;
  *)
    echo "Unsupported mode: $MODE" >&2
    exit 1
    ;;
esac