#!/bin/bash
"""
Bootstrap script for new VPS.
Run this on a fresh VPS to restore everything and resume training.

Usage:
  curl -sSL <raw_url_of_this_script> | bash
  OR
  bash scripts/bootstrap.sh <hf_username>
"""

set -e

HF_USER=${1:-""}
PROJECT_DIR="/home/adminuser/chungcat"

echo "=== 4K Image Model - VPS Bootstrap ==="
echo ""

# 1. Install system deps
echo "[1/6] Installing system dependencies..."
pip3 install torch torchvision torchaudio 2>/dev/null | tail -1
pip3 install diffusers transformers accelerate deepspeed bitsandbytes peft \
    datasets webdataset img2dataset wandb safetensors xformers \
    opencv-python-headless tqdm anthropic huggingface_hub fastapi uvicorn 2>/dev/null | tail -1

# 2. Login to HuggingFace
echo "[2/6] Checking HuggingFace login..."
if ! huggingface-cli whoami &>/dev/null; then
    echo "  Please login to HuggingFace:"
    huggingface-cli login
fi

if [ -z "$HF_USER" ]; then
    HF_USER=$(python3 -c "from huggingface_hub import HfApi; print(HfApi().whoami()['name'])")
fi
echo "  User: $HF_USER"

# 3. Create project structure
echo "[3/6] Creating project structure..."
mkdir -p $PROJECT_DIR/{data/{raw,processed,captions},models,scripts,configs,checkpoints,logs,outputs}

# 4. Restore from HuggingFace
echo "[4/6] Restoring from HuggingFace..."
python3 $PROJECT_DIR/scripts/backup.py --restore --user $HF_USER 2>/dev/null || {
    echo "  No backup found or restore failed. Starting fresh."
}

# 5. Verify GPU
echo "[5/6] Verifying GPU..."
python3 -c "
import torch
print(f'  PyTorch: {torch.__version__}')
print(f'  CUDA: {torch.version.cuda}')
print(f'  GPUs: {torch.cuda.device_count()}')
for i in range(torch.cuda.device_count()):
    print(f'    GPU {i}: {torch.cuda.get_device_name(i)} ({torch.cuda.get_device_properties(i).total_memory/1024**3:.0f}GB)')
"

# 6. Start auto-backup
echo "[6/6] Starting auto-backup (every 30 min)..."
nohup python3 $PROJECT_DIR/scripts/backup.py --auto --interval 30 --user $HF_USER > $PROJECT_DIR/logs/backup.log 2>&1 &
echo "  Auto-backup PID: $!"

echo ""
echo "=== Bootstrap complete! ==="
echo ""
echo "Next steps:"
echo "  - Check data: du -sh $PROJECT_DIR/data/"
echo "  - Resume training: bash $PROJECT_DIR/scripts/training/run_train_flux.sh"
echo "  - Manual backup: python3 $PROJECT_DIR/scripts/backup.py --backup"
echo ""