# ============================================
# Hugging Face Space build configuration
# Project: PaperShow
# ============================================

build:
  python_version: "3.10"
  env:
    HF_HUB_ENABLE_HF_TRANSFER: "1"

  commands:
    # ⚙️ Step 0: 安装系统依赖（OpenCV / Matplotlib / PDF支持）
    - echo "===== [STEP 0] Installing system dependencies ====="
    - apt-get update && apt-get install -y libgl1 libsm6 libxext6 libxrender-dev && rm -rf /var/lib/apt/lists/*

    # ⚙️ Step 1: 升级 pip 基础环境
    - echo "===== [STEP 1] Upgrading pip / setuptools / wheel ====="
    - pip install --upgrade pip setuptools wheel
    - pip config set global.timeout 180
    - pip config set global.index-url https://pypi.org/simple

    # 🚀 Step 2: 安装核心依赖
    - echo "===== [STEP 2] Installing core requirements ====="
    - if [ -f requirements_core.txt ]; then \
          echo "Found requirements_core.txt ✅"; \
          pip install --no-cache-dir --prefer-binary -r requirements_core.txt; \
      else \
          echo "⚠️ requirements_core.txt not found!"; \
      fi

    # 💡 Step 3: 安装额外依赖（失败不阻塞）
    - echo "===== [STEP 3] Installing extra requirements (non-blocking) ====="
    - if [ -f requirements_extra.txt ]; then \
          pip install --no-cache-dir --prefer-binary -r requirements_extra.txt || true; \
      else \
          echo "⚠️ requirements_extra.txt not found, skipping."; \
      fi

    # 🔍 Step 4: 显示安装结果
    - echo "===== [STEP 4] Installed Python packages ====="
    - pip list | head -n 50

    # 🧠 Step 5: 验证关键依赖导入（明确打印）
    - echo "===== [STEP 5] Verifying critical imports ====="
    - python - <<'PYCODE'
import sys
print("Python version:", sys.version)
try:
    import torch, transformers
    print("✅ torch OK (version)", torch.__version__)
    print("✅ transformers OK (version)", transformers.__version__)
except Exception as e:
    print("❌ Dependency import failed:", e)
    sys.exit(1)
    
PYCODE
    # 🚀 Step 6: 启动主应用
    - echo "===== [STEP 6] Launching app.py ====="
    - python app.py