from typing import Iterable
from pathlib import Path
from dataclasses import dataclass
from .common import LcrConnException, from_human_readable_value


@dataclass(frozen=True)
class DataSubset:
    """A list holding available device gauge values for resistor, capacitor or inductor"""

    gauges: tuple[float, ...]
    """A list of available device gauge values"""

    @staticmethod
    def from_iterable(str_gauges: Iterable[str]) -> "DataSubset":
        # Remove redundant parts
        gauges_set: set[float] = set()
        for str_gauge in str_gauges:
            numeric_gauge = from_human_readable_value(str_gauge)
            if numeric_gauge in gauges_set:
                raise LcrConnException(f"Duplicate gauge value found: {str_gauge}")
            else:
                gauges_set.add(numeric_gauge)
        # Return value
        return DataSubset(tuple(gauges_set))

    @staticmethod
    def from_file(filename: Path) -> "DataSubset":
        with open(filename, "r", encoding="utf-8") as f:
            legal_lines = filter(lambda line: line != "", (line.strip() for line in f))
            return DataSubset.from_iterable(legal_lines)


@dataclass(frozen=True)
class DataSet:
    """The dataset include 3 lists of available device gauge values for resistor, capacitor and inductor"""

    resistor: DataSubset
    """A list of available device gauge values for resistor"""
    capacitor: DataSubset
    """A list of available device gauge values for capacitor"""
    inductor: DataSubset
    """A list of available device gauge values for inductor"""

    @staticmethod
    def from_iterable(
        resistor: Iterable[str], capacitor: Iterable[str], inductor: Iterable[str]
    ) -> "DataSet":
        return DataSet(
            DataSubset.from_iterable(resistor),
            DataSubset.from_iterable(capacitor),
            DataSubset.from_iterable(inductor),
        )

    @staticmethod
    def from_file(resistor: Path, capacitor: Path, inductor: Path) -> "DataSet":
        return DataSet(
            DataSubset.from_file(resistor),
            DataSubset.from_file(capacitor),
            DataSubset.from_file(inductor),
        )