#!/usr/bin/env bash
# check-hsi-deps -- Report HSI tier availability
# Exit codes: 0=tier1+, 1=no python, 2=no sklearn
# Output to stdout: "tier:0", "tier:1", or "tier:2"

set -euo pipefail

# Check Python 3
if ! command -v python3 &>/dev/null; then
  echo "tier:0"
  exit 1
fi

# Check sklearn (Tier 1 minimum)
if ! python3 -c "import sklearn" 2>/dev/null; then
  echo "tier:0"
  exit 2
fi

# Check sentence-transformers (Tier 1 full)
has_st=false
if python3 -c "import sentence_transformers" 2>/dev/null; then
  has_st=true
fi

# Check Pinecone (Tier 2)
has_pinecone=false
if python3 -c "import pinecone" 2>/dev/null && [ -n "${PINECONE_API_KEY:-}" ]; then
  has_pinecone=true
fi

if $has_pinecone && $has_st; then
  echo "tier:2"
  exit 0
elif $has_st; then
  echo "tier:1"
  exit 0
else
  # sklearn present but no embeddings -- can still do LSA-only
  echo "tier:1"
  exit 0
fi