#!/bin/sh
set -e

BINARY="/build/synapse_auto_compressor"
REPO_DIR="/build/rust-synapse-compress-state"
DB_PASS=$(cat /run/secrets/db_password)
CONN="postgresql://synapse:${DB_PASS}@db:5432/synapse"
CHUNK_SIZE="${STATE_COMPRESS_CHUNK_SIZE:-500}"
CHUNKS="${STATE_COMPRESS_CHUNKS:-100}"
INTERVAL="${STATE_COMPRESS_INTERVAL:-86400}"

# Build from source if binary doesn't exist
if [ ! -f "$BINARY" ]; then
  echo "[compress-state] Binary not found, building from source..."
  apk add --no-cache git openssl-dev openssl-libs-static perl make musl-dev jemalloc-dev
  rm -rf "$REPO_DIR"
  git clone https://github.com/matrix-org/rust-synapse-compress-state "$REPO_DIR"
  cd "$REPO_DIR"
  cargo build --release -p synapse_auto_compressor
  cp target/release/synapse_auto_compressor "$BINARY"
  echo "[compress-state] Build complete"
  # Clean up source to save space
  rm -rf "$REPO_DIR"
else
  echo "[compress-state] Using cached binary"
fi

# Run compressor in a loop
while true; do
  echo "[compress-state] Running at $(date)"
  "$BINARY" -p "$CONN" -c "$CHUNK_SIZE" -n "$CHUNKS" || echo "[compress-state] Error: $?"
  echo "[compress-state] Done. Sleeping ${INTERVAL}s"
  sleep "$INTERVAL"
done