# -*- coding:utf-8 -*-

'''
本模块是各种工具函数
'''

import sys, os
import numpy as np

def get_path():
    '''
    本函数说明：https://pythonhosted.org/PyInstaller/runtime-information.html#using-sys-executable-and-sys-argv-0
    :return: 返回运行程序的绝对路径
    '''
    frozen = 'not'
    if getattr(sys, 'frozen', False):
        # we are running in a bundle
        bundle_dir = sys._MEIPASS

        # print('we are running in a bundle(pyinstaller打包程序)!')
    else:
        # we are running in a normal Python environment
        # bundle_dir = os.path.dirname(os.path.abspath(__file__))  # 此行代码返回的是本文件的路径，而不是本文件所导入的文件的路径
        bundle_dir = os.getcwd()
        # print('we are running in a normal Python environment(非pyinstaller打包程序)!')

    return bundle_dir


def get_resource_path(relative_path):
    '''
    本函数说明：https://www.zacoding.com/en/post/python-selenium-to-exe/
    :param relative_path:
    :return:
    '''
    try:
        base_path = sys._MEIPASS
    except Exception:
        base_path = os.getcwd()
    return os.path.join(base_path, relative_path)


def percentile_stretching(img, lowPercentile=0, highPercentile=100, minout=0, maxout=255):
    '''
    本程序用于拉伸影像
    :param img:
    :param lowPercentile:
    :param highPercentile:
    :param minout:
    :param maxout:
    :return:
    '''
    if len(img.shape) == 2:
        low = np.percentile(img, lowPercentile)
        up = np.percentile(img, highPercentile)

        img_new = ((img - low) / (up - low)) * (maxout - minout) + minout
        img_new[img_new < minout] = minout
        img_new[img_new > maxout] = maxout
        img_out = np.uint8(img_new)
        return img_out
    else:  # 对于彩色照片，需要先单独对每个波段拉伸
        img_new = np.empty(img.shape)
        for i in range(img.shape[2]):
            low = np.percentile(img[:, :, i], lowPercentile)
            up = np.percentile(img[:, :, i], highPercentile)

            img_new[:, :, i] = minout + ((img[:, :, i] - low) / (up - low)) * (maxout - minout)
            img_new[:, :, i][img_new[:, :, i] < minout] = minout
            img_new[:, :, i][img_new[:, :, i] > maxout] = maxout
        img_out = np.uint8(img_new)
        return img_out


def return_file_path(out, filepath, filename, model='image'):
    '''
    本程序功能：在filepath中寻找所有包含filename所有文件（filename1、filename2），然后返回一个filename3
    :param out: 永远传入一个空list：[]；用于存储所有递归调用
    :param filepath:
    :param filename:
    :param model: 有两个模式：image 和 spectral
    :return:
    '''

    # 出现此处代码的原因是：当次函数定义执行后，函数定义就包含了out参数的引用，
    # 而out参数是可变参数，每一次调用次函数都会改变out的值，所有不能保证每次调用此函数时out==[]。
    # 当第二次调用此方程时
    # if out != []:
    #     if filename not in os.path.splitext(out[-1]):
    #         out = []

    if model == 'image':
        files = os.listdir(filepath)
        for s in files:
            abspath = os.path.join(filepath, s)
            if os.path.isfile(abspath):
                tmp = os.path.splitext(os.path.split(abspath)[1])[0]
                if tmp not in out:  # 防止重复记录
                    if filename in tmp:
                        out.append(tmp)
                    else:
                        pass
                        # print('没有进来')
            elif os.path.isdir(abspath):
                return_file_path(out, abspath, filename)
        out.sort(key=lambda x: int(x.replace(filename, '')))

        if out == []:
            x = filename + str(0)
            return os.path.join(filepath, x), 0
        if out != []:
            number = int(out[-1].replace(filename, '')) + 1
            x = filename + str(number)
            return os.path.join(filepath, x), number
    elif model == 'spectral':
        files = os.listdir(filepath)
        for s in files:
            abspath = os.path.join(filepath, s)
            if os.path.isfile(abspath) and os.path.splitext(s)[1] == '.txt':
                tmp = os.path.splitext(os.path.split(abspath)[1])[0]
                if tmp not in out:  # 防止重复记录
                    if filename in tmp:
                        out.append(tmp)
            elif os.path.isdir(abspath):
                return_file_path(out, abspath, filename)
        out.sort(key=lambda x: int(x.replace(filename, '')))

        if out == []:
            x = filename + str(0) + '.txt'
            return os.path.join(filepath, x), 0
        if out != []:
            number = int(out[-1].replace(filename, '')) + 1  # 现存最大文件号 + 1
            x = filename + str(number) + '.txt'
            return os.path.join(filepath, x), number


if __name__ == '__main__':
    # print(get_path())

    x = return_file_path([], r'D:\delete', 'sss', model='spectral')
    print(x)

    # y = return_file_path([], r'D:\delete', 'rr')
    # print(y)