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

STACK_DIR="${STACK_DIR:-/opt/gitea}"
GITEA_CONTAINER="${GITEA_CONTAINER:-gitea}"
DB_CONTAINER="${DB_CONTAINER:-gitea-db}"
POSTGRES_USER="${POSTGRES_USER:-gitea}"
POSTGRES_DB="${POSTGRES_DB:-gitea}"

cd "$STACK_DIR"
TS="$(date -u +%Y%m%d-%H%M%S)"
BK="$STACK_DIR/backups/$TS"
mkdir -p "$BK"

cp docker-compose.yml "$BK/docker-compose.yml"
if [ -f "$STACK_DIR/gitea-data/gitea/conf/app.ini" ]; then
  cp "$STACK_DIR/gitea-data/gitea/conf/app.ini" "$BK/app.ini"
fi

{
  echo "backup_utc=$TS"
  echo "host=$(hostname)"
  echo "date=$(date -u --iso-8601=seconds)"
  echo "docker=$(docker --version)"
  echo "compose=$(docker compose version 2>/dev/null || true)"
  echo "gitea_version=$(docker exec -u git "$GITEA_CONTAINER" gitea --version 2>/dev/null || true)"
  docker ps --format '{{.Names}} | {{.Image}} | {{.Status}} | {{.Ports}}'
} > "$BK/metadata.txt"

docker exec -u git "$GITEA_CONTAINER" mkdir -p /data/gitea/backup-tmp
DUMP_NAME="gitea-dump-$TS.zip"
docker exec -u git "$GITEA_CONTAINER" gitea dump \
  -c /data/gitea/conf/app.ini \
  -w /data/gitea \
  -f "/data/gitea/backup-tmp/$DUMP_NAME" \
  --quiet

cp "$STACK_DIR/gitea-data/gitea/backup-tmp/$DUMP_NAME" "$BK/$DUMP_NAME"
rm -f "$STACK_DIR/gitea-data/gitea/backup-tmp/$DUMP_NAME"

docker exec "$DB_CONTAINER" pg_dump -U "$POSTGRES_USER" -d "$POSTGRES_DB" -Fc > "$BK/gitea-postgres-$TS.dump"
sha256sum "$BK"/* > "$BK/SHA256SUMS"

echo "Backup created: $BK"
du -sh "$BK" "$BK"/*