import configparser
from pathlib import Path

from ee import EeException
from ee.tools import mk_parents
from ee.xml.uris import DIGIKEY_URI


def load_config(project_dir: Path) -> configparser.ConfigParser:
    config = configparser.ConfigParser()

    config_path = project_dir / "eeconfig"
    try:
        with config_path.open("r") as f:
            config.read_file(f, source=str(config_path))
    except FileNotFoundError:
        pass

    return config


class SupplierDescriptor(object):
    def __init__(self, key: str, uri: str):
        self.key = key
        self.uri = uri


class Project(object):
    def __init__(self, project_dir: Path, cfg: configparser.ConfigParser):
        self.report_dir = project_dir / "ee" / "reports"
        self.public_dir = project_dir / "ee"
        self.cache_dir = project_dir / "ee" / "cache"
        self.project_dir = project_dir
        self._cfg = cfg

        # TODO: read from config
        self._suppliers = [SupplierDescriptor("digikey", DIGIKEY_URI)]

    def get_supplier_by_key(self, key) -> SupplierDescriptor:
        sd = next((s for s in self._suppliers if s.key == key), None)
        if sd:
            return sd
        raise EeException("No such supplier configured: {}".format(key))

    @property
    def cfg(self):
        return self._cfg

    @classmethod
    def load(cls):
        project_dir = Path(".")
        cfg = load_config(project_dir)

        return Project(project_dir, cfg)

    def save(self):
        path = self.project_dir / "eeconfig"
        mk_parents(path)
        with path.open("w") as f:
            self._cfg.write(f)