"""
Build script for Cython extensions.

Usage:
    python scripts/build_cython.py build_ext --inplace
    
Or via make:
    make build-cython
"""

import os
import sys
from pathlib import Path

def build_extensions():
    try:
        from Cython.Build import cythonize
    except ImportError:
        print("Cython not installed. Skipping Cython build.")
        print("Install with: pip install cython")
        return False
    
    try:
        from setuptools import Extension
        from setuptools.dist import Distribution
        from setuptools.command.build_ext import build_ext
    except ImportError:
        print("setuptools not installed. Skipping Cython build.")
        print("Install with: pip install setuptools")
        return False
    
    extensions = [
        Extension(
            "pyserve._path_matcher",
            sources=["pyserve/_path_matcher.pyx"],
            extra_compile_args=["-O3", "-ffast-math"],
            define_macros=[("NPY_NO_DEPRECATED_API", "NPY_1_7_API_VERSION")],
        ),
    ]
    
    ext_modules = cythonize(
        extensions,
        compiler_directives={
            "language_level": "3",
            "boundscheck": False,
            "wraparound": False,
            "cdivision": True,
            "embedsignature": True,
        },
        annotate=True,
    )
    
    dist = Distribution({"ext_modules": ext_modules})
    dist.package_dir = {"": "."}
    
    cmd = build_ext(dist)
    cmd.ensure_finalized()
    cmd.inplace = True
    cmd.run()
    
    print("\nCython extensions built successfully!")
    print("   - pyserve/_path_matcher" + (".pyd" if sys.platform == "win32" else ".so"))
    
    return True


if __name__ == "__main__":
    project_root = Path(__file__).parent.parent
    os.chdir(project_root)
    
    success = build_extensions()
    sys.exit(0 if success else 1)