#!/usr/bin/env bash
# Sets up a Python virtual environment and installs dependencies.
# Run once after cloning: bash setup.sh
set -euo pipefail

MIN_PYTHON_MINOR=8

# Prefer python3.10+ if available, fall back to whatever python3 is present
if command -v python3.12 &>/dev/null; then PYTHON=python3.12
elif command -v python3.11 &>/dev/null; then PYTHON=python3.11
elif command -v python3.10 &>/dev/null; then PYTHON=python3.10
elif command -v python3.9  &>/dev/null; then PYTHON=python3.9
elif command -v python3.8  &>/dev/null; then PYTHON=python3.8
elif command -v python3    &>/dev/null; then PYTHON=python3
else
  echo "ERROR: python3 not found. Install it with: sudo apt install python3 python3-venv python3-pip"
  exit 1
fi

PYVER=$($PYTHON -c "import sys; print(sys.version_info.minor)")
if [ "$PYVER" -lt "$MIN_PYTHON_MINOR" ]; then
  echo "ERROR: Python 3.$MIN_PYTHON_MINOR or newer required (found 3.$PYVER)"
  exit 1
fi

echo "Using $($PYTHON --version)"

# Create virtual environment
if [ ! -d venv ]; then
  $PYTHON -m venv venv
  echo "Created virtual environment in ./venv"
else
  echo "Virtual environment already exists, skipping creation"
fi

# Install dependencies
./venv/bin/pip install --upgrade pip -q
./venv/bin/pip install -r requirements.txt -q
echo "Dependencies installed"

# Create .env if missing
if [ ! -f .env ]; then
  cp .env.example .env
  chmod 600 .env
  echo ""
  echo "Created .env — edit it now and add your Kraken API keys:"
  echo "  nano .env"
else
  echo ".env already exists"
fi

echo ""
echo "Setup complete. To run the bot in paper trading mode:"
echo "  ./venv/bin/python bot.py"
echo ""
echo "To go live:"
echo "  ./venv/bin/python bot.py --live"