# -*- coding: UTF-8 -*-
"""
@Project:__init__.py
@File:pspHAAlphaDecomposition.py Cloude-Pottier分解
@Function: Cloude-Pottier eigenvector/eigenvalue based decomposition of a 3x3 coherency matrix [T3]
           (Averaging using a sliding window)
           V1.0.1:（1）可选分解特征；（2）bin转tif格式
@Contact:
@Author:SHJ
@Date:2021/9/24 9:06
@Version:1.0.1
"""

import os
import shutil
import subprocess
import logging

logger = logging.getLogger("mylog")


class PspCloudePottierDecomposition:
    """
    调用polsarpro4.2.0的Cloude-Pottier极化分解 h_a_alpha_decomposition_T3.exe
    """

    def __init__(
            self,
            exeDir,
            inT3Dir,
            outDir,
            exeDecomposeName='h_a_alpha_decomposition_T3.exe'):
        """
        :param exeDir:exe所在目录
        :param inT3Dir:T3矩阵目录
        :param outDir:输出目录
        """
        self.__exeName = exeDecomposeName
        self.__exeDir = exeDir
        self.__inT3Dir = inT3Dir
        self.__outDir = outDir
        self.__DecompostFlag = False
        pass

    def api_h_a_alpha_decomposition_T3(
            self,
            rectX,
            rectY,
            rectWidth,
            rectHeight,
            Nwin=1):
        """
        :param rectX:有效区域x
        :param rectY:有效区域y
        :param rectWidth:有效区域宽
        :param rectHeight:有效区域高
        :param Nwin :Size of the (Nwin, Nwin) sliding window used to compute local estimates. (int)
        """
        if self.__DecompostFlag:
            return True
        if len(self.__exeDir) == 0:
            if not os.path.exists(self.__exeName):
                logger.error(self.__exeName + ' not exists.')
                return False
            exePath = self.__exeName
        else:
            if not os.path.exists(self.__exeDir + '\\' + self.__exeName):
                logger.error(self.__exeName + ' not exists.')
                return False
            exePath = self.__exeDir + '\\' + self.__exeName

        if not self._checkT3Matrix(self.__inT3Dir):
            logger.error('T3 Matrix check failed.')
            return False
        if not os.path.exists(self.__outDir):
            os.makedirs(self.__outDir)

        alpbetdelgam = 1
        Lambda = 1
        alpha = 1
        entropy = 1
        anisotropy = 1

        CombHA = 0
        CombH1mA = 0
        Comb1mHA = 0
        Comb1mH1mA = 0

        Off_lig = rectX
        Off_col = rectY
        Sub_Nlig = rectWidth
        Sub_Ncol = rectHeight

        para_list = [exePath, self.__inT3Dir, self.__outDir, Nwin, Off_lig, Off_col, Sub_Nlig, Sub_Ncol, alpbetdelgam,
            Lambda, alpha, entropy, anisotropy, CombHA, CombH1mA, Comb1mHA, Comb1mH1mA]
        cmd = "h_a_alpha_decomposition_T3.exe -id {} -od {} -iodf T3 -nwr 1 -nwc 1 -ofr 0 -ofc 0 -fnr {} " \
              "-fnc {} -fl1 {} -fl2 {} -fl3 {} -fl4 {} -fl5 {} -fl6 {} -fl7 {} -fl8 {} -fl9 {}".format(self.__inT3Dir,
                                                                                                       self.__outDir,
                                                                                                       Sub_Nlig,
                                                                                                       Sub_Ncol,
                                                                                                       alpbetdelgam,
                                                                                                       Lambda,
                                                                                                       alpha,
                                                                                                       entropy,
                                                                                                       anisotropy,
                                                                                                       CombHA,
                                                                                                       CombH1mA,
                                                                                                       Comb1mHA,
                                                                                                       Comb1mH1mA)

        logger.info('h_a_alpha_decomposition:{}'.format(cmd))
        result = os.system(cmd)
        logger.info('cmd_result:{}'.format(result))
        logger.info('h_a_alpha_decomposition finish!')
        # cmd = " ".join(str(i) for i in para_list)
        config_path = os.path.join(self.__inT3Dir, 'config.txt')
        shutil.copyfile(config_path, os.path.join(self.__outDir, 'config.txt'))
        # result_tuple = subprocess.getstatusoutput(cmd)

        # if result_tuple[0] != 1 or result_tuple[1].find('error') != -1:
        #     raise Exception(result_tuple[1])
        self.__DecompostFlag = True
        return True

    @staticmethod
    def _checkT3Matrix(T3Dir):
        # 检测T3矩阵
        if not os.path.exists(T3Dir):
            return False
        file_name_in_out = ['T11.bin', 'T12_real.bin', 'T12_imag.bin',
                            'T13_real.bin', 'T13_imag.bin', 'T22.bin',
                            'T23_real.bin', 'T23_imag.bin', 'T33.bin']
        for item in file_name_in_out:
            if not os.path.exists(T3Dir + "\\" + item):
                return False
        return True