# -*- coding:utf-8 -*-
import os, sys, time
import inspect
import cv2 as cv
import numpy as np
from ssat_sdk.utils import LoggingUtil
from image_util import *

class LineUtil():

    '''
    BGR图片传入，获取直线

    '''
    def getLines(self, img, lineMinLen = 20, lineMaxLen = 1000, ableArea=None, threshold1=50, threshold2=100, apertureSize=5, lineThreshold = 200):
        targetMat = np.array(img)
        if (ableArea <> None):
            targetMat = cutMat(img, ableArea)

        grayMat = cv.cvtColor(targetMat, cv.COLOR_BGR2GRAY)
        # cv.imshow("gray", grayMat)

        lines, imageGray = self.getGrayLines(grayMat, lineMinLen,lineMaxLen,ableArea,threshold1,threshold2,apertureSize,lineThreshold)
        return lines, imageGray

    def getGrayLines(self, imgGray, lineMinLen = 20, lineMaxLen = 1000, ableArea=None, threshold1=50, threshold2=100, apertureSize=5, lineThreshold = 200):
        edges = cv.Canny(imgGray, threshold1, threshold2, apertureSize=apertureSize)
        # cv.imshow("edges",edges)
        lines = cv.HoughLinesP(edges, 2, np.pi / 180, lineThreshold)
        retLines = []
        if lines is None:
            return None, None
        for line in lines:
            x1, y1, x2, y2 = line[0]
            # print "line:", x1, y1, x2, y2
            # "line rgb:",PreImageJudge.getImgAverageRGB(targetMat, (x1, y1, x2+1, y2+1)), \
            # "icon rgb:",PreImageJudge.getAverageRGB(icon)
            lineLen = self.caculateLinLen(line[0])
            if lineLen > lineMinLen and lineLen < lineMaxLen:
                # print "retLine:", line[0]
                cv.line(imgGray, (x1, y1), (x2, y2), 255, 2)
                retLines.append(line[0])
        # cv.imshow("getLines", imgGray)
        # cv.waitKey(0)
        # cv.destroyAllWindows()
        return retLines, imgGray

    '''
    :param lines:

    '''
    def combineLineList(self, lines, maxDistanse=5):
        retLines = []
        for findex in range(0, lines.__len__() - 1):
            if (lines[findex] is None):
                continue
            tmpLine = lines[findex]
            for sindex in range(1, lines.__len__()):
                if (lines[sindex] is None):
                    continue
                secondLine = lines[sindex]
                isCombined,tmpLine = self.combine2Line(tmpLine,secondLine, maxDistanse)
                if (isCombined):
                    lines[sindex] = None
            retLines.append(tmpLine)
        return retLines
    '''
    判断两条线段是否在同一个线段上，是否可以组合成一条线段。
    :param line1:[x1, y1, x2, y2],第一条线段，基础线段。
    :param line2:[x1, y1, x2, y2],第二条线段，拿来对比合并的线段。
    :return 1: bool，是否合并了两条线段。True代表已合并，False代表未合并。
    :return 2:[x1, y1, x2, y2],最终得到的线段，True是已合并的线段，False则返回line1
    '''

    def combine2Line(self, line1, line2, maxDistance):
        # print "combine2Line,line1,line2:",line1, line2
        line1 = self.toOriginLine(line1)
        line2 = self.toOriginLine(line2)
        # 1 判断是不是同是竖线或者横线。纵向方向不同，返回False
        direct1 = self.lineDirect(line1)
        direct2 = self.lineDirect(line2)
        if (direct1 <> direct2):
            return False, line1

        # 2 判断两条线段所在直线的平行距离。平行距离太远返回False
        maxDistance = maxDistance
        paralDistance = self.getParalDistance(line1, line2, direct1)
        if (paralDistance > maxDistance):
            return False, line1

        # 3 判断两条线段纵向距离。在纵向上相离，相交，包含，相离太远返回False
        maxInterval = maxDistance
        status, interval, lineNear, lineFar = self.getLengthwaysDistance(line1, line2, direct1)
        if ((status == 1) and (interval > maxInterval)) or (status == -1):
            return False, line1

        # 4 合并相离不远、相交和包含的线段
        point1 = lineNear[0],lineNear[1]
        point2 = self.getMaxPoint([lineNear[2], lineNear[3]],[lineFar[0], lineFar[1]],[lineFar[2], lineFar[3]])
        retLine = [-1,-1,-1,-1]
        if direct1 == 1:
            retLine[0] = point1[0]
            retLine[2] = point2[0]
            retLine[1] = (point1[1] + point2[1])/2
            retLine[3] = (point1[1] + point2[1])/2
        else:
            retLine[1] = point1[1]
            retLine[3] = point2[1]
            retLine[0] = (point1[0] + point2[0])/2
            retLine[2] = (point1[0] + point2[0])/2

        return True, retLine

    '''
    例如：[1002 ,134,1002 , 43] 调整为[1002,43,1002,134]
    '''
    def toOriginLine(self, line):
        retLine = line
        if (line[0] + line[1]) > (line[2]+line[3]):
            retLine = [line[2] , line[3], line[0],line[1]]
        return retLine

    def getMaxPoint(self, *pointList):
        # print "getMaxPoint:",pointList
        maxPoint = [-1,-1]
        for point in pointList:
            if (maxPoint[0] + maxPoint[1]) < (point[0] + point[1]):
                maxPoint[0] = point[0]
                maxPoint[1] = point[1]
        return maxPoint

    def getMinPoint(self, *pointList):
        # print "getMinPoint:",pointList
        minPoint = [10000,10000]
        for point in pointList:
            if (minPoint[0] + minPoint[1]) > (point[0] + point[1]):
                minPoint[0] = point[0]
                minPoint[1] = point[1]
        return minPoint

    '''
    找到所有线段中的最小坐标点和最大坐标点
    '''
    def getLineMMPoint(self, lineList):
        minPoint = [10000,10000]
        maxPoint = [-1,-1]
        for line in lineList:
            minPoint = self.getMinPoint(minPoint, (line[0],line[1]), (line[2],line[3]))
            maxPoint = self.getMaxPoint(maxPoint, (line[0],line[1]), (line[2],line[3]))
        return minPoint,maxPoint

    '''
    查看line是水平线段，还是竖直线段，或者其他斜线
    :param line1:[x1, y1, x2, y2]，线段1
    :param line2:[x1, y1, x2, y2]，线段2
    :param direct:1 代表水平，2代表竖直
    :return int:1 代表相离，2 代表相交，3 代表包含, -1 代表识别异常
    :return int:相离的距离，-1或者相离实际距离
    :return line1: 接近原点的线段
    :return line2: 远离原点的线段
    '''
    def getLengthwaysDistance(self, line1, line2, direct):
        status = -1
        distance = -1
        tallLine = line1
        shortLine = line2
        lineLen1 = self.caculateLinLen(line1)
        lineLen2 = self.caculateLinLen(line2)
        if (lineLen1 > lineLen2):
            tallLine = line1
            shortLine = line2
        else:
            tallLine = line2
            shortLine = line1

        if (direct == 1):
            if (tallLine[1] < shortLine[1]) and (tallLine[3] < shortLine[1]):
                status = 1
                distance = shortLine[1] - tallLine[3]
                return status, distance, tallLine, shortLine
            if (tallLine[1] < shortLine[1]) and (tallLine[3] >= shortLine[1]) and (tallLine[3] < shortLine[3]):
                status = 2
                distance = -1
                return status, distance, tallLine, shortLine
            if (tallLine[1] <= shortLine[1]) and (tallLine[3] >= shortLine[3]):
                status = 3
                distance = -1
                return status, distance, tallLine, shortLine
            if (tallLine[1] > shortLine[1]) and (tallLine[1] <= shortLine[3]) and (tallLine[3] > shortLine[3]):
                status = 2
                distance = -1
                return status, distance, shortLine, tallLine
            if (tallLine[1] > shortLine[3]) and (tallLine[3] > shortLine[3]):
                status = 1
                distance = tallLine[1] - shortLine[3]
                return status, distance, shortLine, tallLine

        if (direct == 2):
            if (tallLine[0] < shortLine[0]) and (tallLine[2] < shortLine[0]):
                status = 1
                distance = shortLine[0] - tallLine[2]
                return status, distance, tallLine, shortLine
            if (tallLine[0] < shortLine[0]) and (tallLine[2] >= shortLine[0]) and (tallLine[2] < shortLine[2]):
                status = 2
                distance = -1
                return status, distance, tallLine, shortLine
            if (tallLine[0] <= shortLine[0]) and (tallLine[2] >= shortLine[2]):
                status = 3
                distance = -1
                return status, distance, tallLine, shortLine
            if (tallLine[0] > shortLine[0]) and (tallLine[0] <= shortLine[2]) and (tallLine[2] > shortLine[2]):
                status = 2
                distance = -1
                return status, distance, shortLine, tallLine
            if (tallLine[0] > shortLine[2]) and (tallLine[2] > shortLine[2]):
                status = 1
                distance = tallLine[0] - shortLine[2]
                return status, distance, shortLine, tallLine
        return status, distance, shortLine, tallLine
    '''
    查看line是水平线段，还是竖直线段，或者其他斜线
    :param line1:[x1, y1, x2, y2]，线段1
    :param line2:[x1, y1, x2, y2]，线段2
    :param direct:1 代表水平，2代表竖直
    :return int:1 代表水平，2代表竖直，0代表其他斜线
    '''
    def getParalDistance(self, line1, line2, direct):
        if direct == 1:
            return abs(line1[1] - line2[1])
        if direct == 2:
            return abs(line1[0] - line2[0])

    '''
    查看line是水平线段，还是竖直线段，或者其他斜线
    :param line:[x1, y1, x2, y2]，线段
    :return bool:1 代表水平，2代表竖直，0代表其他斜线
    '''
    def lineDirect(self, line):
        if (line[0] == line[2]):
            return 2
        elif (line[1] == line[3]):
            return 1
        else:
            return 0

    def caculateLinLen(self, line):
        dx = abs(line[0] - line[2])
        dy = abs(line[1] - line[3])
        # print "caculateLinLen:",dx,dy
        lineLen = np.sqrt(np.square(dx) + np.square(dy))
        return lineLen