import csv
import re
from typing import List
import skimage.io as skio
import numpy as np
import json
import pandas as pds

import matplotlib.colors as mcolors


base_colors = list(mcolors.BASE_COLORS)


def create_image_stack(
    image_format: str,
    fov: str,
    z: str,
    irs: List[str],
    wvs: List[str],
    out_file: str,
    coord_file: str,
):
    """Creates the images in an memory format for convenient data access in later reports

    Args:
        image_format (str): The file image pattern that will be used to construct the image stacks
        fov (str): The Fov of images to use for the stack
        z (str): The z of the images to use for the stack
        irs (List[str]): The list of imaging rounds for the stack
        wvs (List[str]): The list of channels for the stack
        out_file (str): The filename of the image stack produced
        coord_file (str): The filename of the coordinate file produced
    """
    # if any parameter is a single string, then make it into an iterable
    # list object

    if not isinstance(irs, list):
        irs = [irs]
    if not isinstance(wvs, list):
        wvs = [wvs]

    # Extract a test image to get size parameter out of
    test_img = skio.imread(image_format.format(wv=wvs[0], fov=fov, ir=irs[0], z=z))

    xyshape = test_img.shape
    x = xyshape[1]
    y = xyshape[0]

    # Load in all the data

    # Pre-allocate the image stack
    img_stack = np.zeros((y, x, len(wvs), len(irs),))
    for iir, ir in enumerate(irs):
        for iwv, wv in enumerate(wvs):

            img_stack[:, :, iwv, iir] = skio.imread(
                image_format.format(wv=wv, fov=fov, ir=ir, z=z)
            )
    # Drop it all into an npy file
    np.save(out_file, img_stack)

    # Save all the coordinates for the dimensions into a seperate file
    data = {"y": y, "x": x, "wvs": wvs, "irs": irs, "fovs": [fov], "zs": [z]}
    a_file = open(coord_file, "w")
    a_file = json.dump(data, a_file)


class Codebook:
    """The Codebook helper class

    Args:
        codebook_path (str): The path to the codebook file
    """
    def __init__(self, codebook_path: str):
        # TODO this could probably work well as a pandas df
        self.names = []
        self.ids = []
        self.barcode_strings = []
        with open(codebook_path, encoding="utf8") as csv_file:
            codebook_reader = csv.reader(csv_file)
            for i, row in enumerate(codebook_reader):
                if i == 0:
                    self.version = row[1]
                elif i == 1:
                    self.codebook_name = row[1]
                elif i == 2:
                    self.bit_names = row[1:]
                elif i >= 4:
                    self.names.append(row[0])
                    self.ids.append(row[1])
                    self.barcode_strings.append(row[2])
        self.barcode_arrays = [
            np.array([int(char) for char in re.sub(r"\s", "", barcode)], dtype="uint8")
            for barcode in self.barcode_strings
        ]

    def __len__(self):
        return len(self.names)

    def normalize_barcode(self, barcode_array):
        if np.sum(barcode_array) == 0:
            return barcode_array
        return barcode_array / np.sqrt(np.sum(barcode_array ** 2))

    def get_weighted_barcodes(self):
        magnitudes = [np.sqrt(sum(barcodes ** 2)) for barcodes in self.barcode_arrays]
        return [
            (self.barcode_arrays[i] / magnitudes[i]).astype("float16")
            for i in range(len(self.barcode_arrays))
        ]

    def get_single_bit_error_matrix(self, barcode_id):
        barcode_array = self.barcode_arrays[barcode_id]
        bit_error_matrix = [self.normalize_barcode(barcode_array)]
        for i in range(len(barcode_array)):
            corrected_barcode = barcode_array.copy()
            corrected_barcode[i] = np.logical_not(corrected_barcode[i])
            bit_error_matrix.append(self.normalize_barcode(corrected_barcode))
        return np.array(bit_error_matrix)


def read_table(file: str) -> pds.DataFrame:
    """Reads a file differently depending on its extension

    Args:
        file (str): The filename 

    Raises:
        ValueError: If the file extension is unrecognized

    Returns:
        pandas.DataFrame: _description_
    """
    ext = file.split(".")[-1]
    if ext == "csv":
        df = pds.read_csv(file)
    elif ext == "tsv":
        df = pds.read_csv(file, "\t")
    elif ext in {"xls", "xlsx", "xlsm", "xlsb"}:
        df = pds.read_excel(file)
    else:
        raise ValueError("Unexpected file extension")
    return df