"""Handle local builtin datasets."""

import os
from .base import get_list_of_files


dirs = [
    "10740",
    "arcgis",
    "baltim",
    "berlin",
    "book",
    "burkitt",
    "calemp",
    "chicago",
    "columbus",
    "desmith",
    "geodanet",
    "georgia",
    "juvenile",
    "Line",
    "mexico",
    "networks",
    "Point",
    "Polygon",
    "Polygon_Holes",
    "sids2",
    "snow_maps",
    "stl",
    "street_net_pts",
    "tests",
    "tokyo",
    "us_income",
    "virginia",
    "wmat",
]


class LocalExample:
    """Builtin pysal example dataset.

    Attributes
    ----------
    name : str
        Example name
    dirname : str
        Path holding example files
    installed : boolean
        If True, example is installed locally, if false it is remote.
    description : str
        Summary of the properties of the example
    """

    def __init__(self, name, dirname):
        """Initialize LocalExample with name and dirname.

        Parameters
        ---------
        name : str
            example name
        dirname: str
             path to directory holding example files
        """
        self.name = name
        self.dirname = dirname
        self.installed = True
        self.description = self.get_description()

    def get_file_list(self) -> list:
        """Return a list of file names."""
        return get_list_of_files(self.dirname)

    def get_path(self, file_name: str, verbose=True) -> str:
        """Get path for local file."""
        file_list = self.get_file_list()
        for file_path in file_list:
            base_name = os.path.basename(file_path)
            if file_name == base_name:
                return file_path
        if verbose:
            print("{} is not a file in this example".format(file_name))
        return None

    def explain(self):
        """Provide a printed description of the example."""
        description = [f for f in self.get_file_list() if "README.md" in f][0]
        with open(description, "r", encoding="utf8") as f:
            print(f.read())

    def get_description(self) -> str:
        """Dataset description."""
        description = [f for f in self.get_file_list() if "README.md" in f][0]
        with open(description, "r", encoding="utf8") as f:
            lines = f.readlines()
        return lines[3].strip()


builtin_root = os.path.dirname(__file__)

paths = [os.path.join(builtin_root, local) for local in dirs]
paths = zip(dirs, paths)

datasets = {}

for name, pth in paths:
    files = get_list_of_files(pth)
    file_names = [os.path.basename(file) for file in files]
    if "README.md" in file_names:
        example = LocalExample(name, pth)
        datasets[name] = example
