#!/bin/bash

set -euo pipefail

ZIP_URL="${1:-https://webshare.casaderoll.de/share/Phoenix.zip}"
PHOENIX_ROOT="${2:-}"

if [ -z "$PHOENIX_ROOT" ] || [ ! -d "$PHOENIX_ROOT" ]; then
  echo "invalid Phoenix root: $PHOENIX_ROOT" >&2
  exit 1
fi

TMP_BASE="${TMPDIR:-/tmp}"
WORK_DIR="$(mktemp -d "$TMP_BASE/phoenix-update.XXXXXX")"
ZIP_PATH="$WORK_DIR/phoenix.zip"
EXTRACT_DIR="$WORK_DIR/extract"
PHOENIX_PARENT="$(cd "$PHOENIX_ROOT/.." && pwd -P)"
PHOENIX_NAME="$(basename "$PHOENIX_ROOT")"
STAGE_DIR="$PHOENIX_PARENT/${PHOENIX_NAME}.update"
LOG_FILE="$PHOENIX_PARENT/${PHOENIX_NAME}.update.log"

exec >>"$LOG_FILE" 2>&1
echo "=== $(date): update_phoenix_from_zip.sh START ==="
echo "ZIP_URL=$ZIP_URL"
echo "PHOENIX_ROOT=$PHOENIX_ROOT"
echo "STAGE_DIR=$STAGE_DIR"

cleanup() {
  echo "cleanup work dir: $WORK_DIR"
  rm -rf "$WORK_DIR"
}
trap cleanup EXIT

mkdir -p "$EXTRACT_DIR"

if ! command -v curl >/dev/null 2>&1; then
  echo "curl not found" >&2
  exit 1
fi

extract_zip() {
  local zip_path="$1"
  local extract_dir="$2"

  if command -v unzip >/dev/null 2>&1; then
    unzip -oq "$zip_path" -d "$extract_dir"
    return
  fi

  if command -v python3 >/dev/null 2>&1; then
    python3 -m zipfile -e "$zip_path" "$extract_dir"
    return
  fi

  echo "no zip extractor found: install unzip or python3" >&2
  exit 1
}

echo "downloading update archive..."
curl -fL "$ZIP_URL" -o "$ZIP_PATH"
echo "download complete: $ZIP_PATH"
extract_zip "$ZIP_PATH" "$EXTRACT_DIR"
echo "archive extracted to: $EXTRACT_DIR"

SOURCE_DIR=""
while IFS= read -r candidate; do
  if [ -f "$candidate/Cargo.toml" ] && [ -d "$candidate/www" ] && [ -d "$candidate/src" ]; then
    SOURCE_DIR="$candidate"
    break
  fi
done < <(find "$EXTRACT_DIR" -mindepth 0 -maxdepth 4 -type d | sort)

if [ -z "$SOURCE_DIR" ]; then
  echo "no Phoenix project found inside update archive" >&2
  exit 1
fi
echo "source project root: $SOURCE_DIR"

# Build-Artefakte und Mac-Reste nie mitdeployen.
find "$SOURCE_DIR" -type d \( -name target -o -name .git \) -prune -exec rm -rf {} +
find "$SOURCE_DIR" -type f \( -name '.DS_Store' -o -name 'Thumbs.db' \) -delete
echo "source tree cleaned"

rm -rf "$STAGE_DIR"
mkdir -p "$STAGE_DIR"
echo "stage dir prepared"

if command -v rsync >/dev/null 2>&1; then
  rsync -a --delete --omit-dir-times --no-perms --no-owner --no-group \
    "$SOURCE_DIR"/ "$STAGE_DIR"/
else
  echo "rsync not found; using cp fallback"
  cp -a "$SOURCE_DIR"/. "$STAGE_DIR"/
fi
echo "stage sync complete"

if [ ! -f "$STAGE_DIR/Cargo.toml" ] || [ ! -d "$STAGE_DIR/src" ] || [ ! -d "$STAGE_DIR/www" ] || [ ! -d "$STAGE_DIR/scripts" ]; then
  echo "staged update is incomplete: $STAGE_DIR" >&2
  exit 1
fi
echo "staged update validated"
echo "=== $(date): update_phoenix_from_zip.sh OK ==="