from __future__ import annotations

import shutil
from pathlib import Path


PACKAGING_DIR = Path(__file__).resolve().parent
PROJECT_ROOT = PACKAGING_DIR.parent
BUILD_DIR = PACKAGING_DIR / "build"
PACKAGE_DIR = BUILD_DIR / "geometry_measure"

SOURCE_FILES = [
    "main.py",
    "pipeline.py",
    "io_handler.py",
    "config_loader.py",
    "cad_converter.py",
    "registration.py",
    "evaluation.py",
    "visualization.py",
    "config.yaml",
]

SOURCE_DIRS = [
    "preprocessing",
]

ARCHIVE_FILES = [
    "translate_align_pointcloud_to_cad.py",
]

IMPORT_REWRITES = {
    "from pipeline import MeasurementPipeline": "from geometry_measure.pipeline import MeasurementPipeline",
    "from cad_converter import CADConverter": "from geometry_measure.cad_converter import CADConverter",
    "from config_loader import ConfigLoader": "from geometry_measure.config_loader import ConfigLoader",
    "from evaluation import Evaluator": "from geometry_measure.evaluation import Evaluator",
    "from io_handler import IOHandler": "from geometry_measure.io_handler import IOHandler",
    "from preprocessing.curvature import CurvatureEstimator": (
        "from geometry_measure.preprocessing.curvature import CurvatureEstimator"
    ),
    "from preprocessing.filters import PreprocessingRunner": (
        "from geometry_measure.preprocessing.filters import PreprocessingRunner"
    ),
    "from preprocessing.noise import GaussianNoiseAdder": (
        "from geometry_measure.preprocessing.noise import GaussianNoiseAdder"
    ),
    "from preprocessing.plane import PlaneEstimator": "from geometry_measure.preprocessing.plane import PlaneEstimator",
    "from preprocessing.plane import PlaneResult": "from geometry_measure.preprocessing.plane import PlaneResult",
    "from registration import PointCloudRegistration": "from geometry_measure.registration import PointCloudRegistration",
    "from visualization import Visualizer": "from geometry_measure.visualization import Visualizer",
}

PATH_REWRITES = {
    "CAD/11.step": "datasets/CAD/11.step",
    "Mesh/11.stl": "datasets/Mesh/11.stl",
    "PointCloud/11.ply": "datasets/PointCloud/11.ply",
    "Noise_PointCloud/11_noisy.ply": "datasets/Noise_PointCloud/11_noisy.ply",
}


def main() -> None:
    rebuild_dir()
    copy_packaging_metadata()
    copy_sources()
    write_package_markers()
    rewrite_python_imports()
    rewrite_default_paths()
    print(f"Build package prepared at: {BUILD_DIR}")
    print("Install with: pip install -e packaging/build")


def rebuild_dir() -> None:
    if BUILD_DIR.exists():
        shutil.rmtree(BUILD_DIR)
    PACKAGE_DIR.mkdir(parents=True)


def copy_packaging_metadata() -> None:
    shutil.copy2(PACKAGING_DIR / "pyproject.toml", BUILD_DIR / "pyproject.toml")
    shutil.copy2(PACKAGING_DIR / "MANIFEST.in", BUILD_DIR / "MANIFEST.in")
    shutil.copy2(PACKAGING_DIR / "README.md", BUILD_DIR / "README.md")


def copy_sources() -> None:
    for relative in SOURCE_FILES:
        src = PROJECT_ROOT / relative
        if not src.exists():
            raise FileNotFoundError(f"Missing source file: {src}")
        shutil.copy2(src, PACKAGE_DIR / relative)

    for relative in SOURCE_DIRS:
        src = PROJECT_ROOT / relative
        if not src.exists():
            raise FileNotFoundError(f"Missing source directory: {src}")
        shutil.copytree(src, PACKAGE_DIR / relative)

    archive_dir = PACKAGE_DIR / "archive"
    archive_dir.mkdir(parents=True, exist_ok=True)
    for relative in ARCHIVE_FILES:
        src = PROJECT_ROOT / "archive" / relative
        if not src.exists():
            raise FileNotFoundError(f"Missing archive file: {src}")
        shutil.copy2(src, archive_dir / relative)


def write_package_markers() -> None:
    (PACKAGE_DIR / "__init__.py").write_text(
        '"""Industrial geometry measurement toolkit."""\n\n__version__ = "0.1.0"\n',
        encoding="utf-8",
    )
    preprocessing_init = PACKAGE_DIR / "preprocessing" / "__init__.py"
    preprocessing_init.write_text('"""Preprocessing tools for point-cloud workflows."""\n', encoding="utf-8")
    archive_init = PACKAGE_DIR / "archive" / "__init__.py"
    archive_init.write_text('"""Archived developer workflows exposed by the CLI."""\n', encoding="utf-8")


def rewrite_python_imports() -> None:
    for path in PACKAGE_DIR.rglob("*.py"):
        text = path.read_text(encoding="utf-8")
        for old, new in IMPORT_REWRITES.items():
            text = text.replace(old, new)
        path.write_text(text, encoding="utf-8")


def rewrite_default_paths() -> None:
    targets = [PACKAGE_DIR / "config.yaml", PACKAGE_DIR / "config_loader.py"]
    for path in targets:
        text = path.read_text(encoding="utf-8")
        for old, new in PATH_REWRITES.items():
            text = text.replace(old, new)
        path.write_text(text, encoding="utf-8")


if __name__ == "__main__":
    main()