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

DBOPS_ROOT=${DBOPS_ROOT:-/data/adaptai/platform/dbops}
LOG_DIR="$DBOPS_ROOT/logs/weaviate"
mkdir -p "$LOG_DIR" "$DBOPS_ROOT/binaries/weaviate" "$DBOPS_ROOT/binaries/weaviate-src"

echo "[weaviate-build] starting" | tee -a "$LOG_DIR/build.log"

# Install Go toolchain locally if missing
GOROOT="$DBOPS_ROOT/binaries/go/go"
if [ ! -x "$GOROOT/bin/go" ]; then
  echo "[weaviate-build] installing Go toolchain" | tee -a "$LOG_DIR/build.log"
  mkdir -p "$DBOPS_ROOT/binaries/go"
  curl -fsSL https://go.dev/dl/go1.22.5.linux-amd64.tar.gz -o "$LOG_DIR/go.tgz"
  tar -C "$DBOPS_ROOT/binaries/go" -xzf "$LOG_DIR/go.tgz"
fi
export PATH="$GOROOT/bin:$PATH"

# Clone or update source
SRC="$DBOPS_ROOT/binaries/weaviate-src"
if [ ! -d "$SRC/.git" ]; then
  echo "[weaviate-build] cloning source" | tee -a "$LOG_DIR/build.log"
  git clone --depth 1 https://github.com/weaviate/weaviate "$SRC" >> "$LOG_DIR/build.log" 2>&1
else
  echo "[weaviate-build] updating source" | tee -a "$LOG_DIR/build.log"
  git -C "$SRC" pull --ff-only >> "$LOG_DIR/build.log" 2>&1 || true
fi

cd "$SRC"
echo "[weaviate-build] downloading modules" | tee -a "$LOG_DIR/build.log"
go mod download >> "$LOG_DIR/build.log" 2>&1 || true

OUT="$DBOPS_ROOT/binaries/weaviate/weaviate"
echo "[weaviate-build] building (static)" | tee -a "$LOG_DIR/build.log"
if CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o "$OUT" ./cmd/weaviate >> "$LOG_DIR/build.log" 2>&1; then
  echo "[weaviate-build] built static binary" | tee -a "$LOG_DIR/build.log"
else
  echo "[weaviate-build] static build failed, retry with CGO" | tee -a "$LOG_DIR/build.log"
  CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -o "$OUT" ./cmd/weaviate >> "$LOG_DIR/build.log" 2>&1
fi

chmod +x "$OUT"
echo "[weaviate-build] DONE -> $OUT" | tee -a "$LOG_DIR/build.log"
exit 0