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

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
set -a
eval "$(grep -v '^#' "$REPO_ROOT/.env" | grep -v '^$' | grep '^[A-Za-z_][A-Za-z_0-9]*=' )"
set +a
set -a
eval "$(grep -v '^#' "$REPO_ROOT/nextcloud/.env" | grep -v '^$' | grep '^[A-Za-z_][A-Za-z_0-9]*=' )"
set +a
DATA_ROOT="${DATA_ROOT:-/opt/docker-data}"

BACKUP_DIR="/opt/backups"

# ------------------------------------------------------------------
# Usage
# ------------------------------------------------------------------
if [ $# -lt 1 ]; then
  echo "Usage: $0 <date>"
  echo "  e.g.: $0 2026-03-22"
  echo ""
  echo "Expects these files in $BACKUP_DIR:"
  echo "  nextcloud-db-<date>.sql"
  echo "  nextcloud-data-<date>.tar.gz"
  echo "  gitea-<date>.tar.gz"
  exit 1
fi

DATE="$1"
DB_DUMP="$BACKUP_DIR/nextcloud-db-$DATE.sql"
NC_ARCHIVE="$BACKUP_DIR/nextcloud-data-$DATE.tar.gz"
GITEA_ARCHIVE="$BACKUP_DIR/gitea-$DATE.tar.gz"

for f in "$DB_DUMP" "$NC_ARCHIVE" "$GITEA_ARCHIVE"; do
  if [ ! -f "$f" ]; then
    echo "ERROR: $f not found."
    exit 1
  fi
done

echo "==> Restoring from backup date: $DATE"
echo "    This will overwrite current data. Press Ctrl+C within 5s to abort."
sleep 5

# ------------------------------------------------------------------
# Stop services
# ------------------------------------------------------------------
echo "==> Stopping services..."
docker compose -f "$REPO_ROOT/nextcloud/docker-compose.yml" --env-file "$REPO_ROOT/.env" down
docker compose -f "$REPO_ROOT/gitea/docker-compose.yml" --env-file "$REPO_ROOT/.env" down

# ------------------------------------------------------------------
# Restore Nextcloud data
# ------------------------------------------------------------------
echo "==> Restoring Nextcloud data..."
tar -xzf "$NC_ARCHIVE" -C "$DATA_ROOT"

# ------------------------------------------------------------------
# Restore Gitea data
# ------------------------------------------------------------------
echo "==> Restoring Gitea data..."
tar -xzf "$GITEA_ARCHIVE" -C "$DATA_ROOT"

# ------------------------------------------------------------------
# Start Postgres and restore DB
# ------------------------------------------------------------------
echo "==> Starting Postgres for DB restore..."
docker compose -f "$REPO_ROOT/nextcloud/docker-compose.yml" --env-file "$REPO_ROOT/.env" up -d postgres
echo "  -> Waiting for Postgres to be ready..."
until docker exec nextcloud-postgres pg_isready -U "$POSTGRES_USER" -d "$POSTGRES_DB" &>/dev/null; do
  sleep 1
done

echo "==> Restoring Nextcloud database..."
docker exec -i nextcloud-postgres psql -U "$POSTGRES_USER" -d postgres < "$DB_DUMP"

# ------------------------------------------------------------------
# Start all services
# ------------------------------------------------------------------
echo "==> Starting all services..."
docker compose -f "$REPO_ROOT/nextcloud/docker-compose.yml" --env-file "$REPO_ROOT/.env" up -d
docker compose -f "$REPO_ROOT/gitea/docker-compose.yml" --env-file "$REPO_ROOT/.env" up -d

echo "==> Restore complete."