#Copyright ReportLab Europe Ltd. 2000-2017
#see license.txt for license details
#history https://hg.reportlab.com/hg-public/reportlab/log/tip/src/reportlab/graphics/charts/doughnut.py
# doughnut chart

__version__='3.3.0'
__doc__="""Doughnut chart

Produces a circular chart like the doughnut charts produced by Excel.
Can handle multiple series (which produce concentric 'rings' in the chart).

"""

from math import sin, cos, pi
from reportlab.lib import colors
from reportlab.lib.validators import isNumber, isListOfStringsOrNone, OneOf,\
                                    isBoolean, isNumberOrNone, isListOfNoneOrNumber,\
                                    isListOfListOfNoneOrNumber, EitherOr, NoneOr, \
                                    isCallable
from reportlab.lib.attrmap import *
from reportlab.graphics.shapes import Group, Drawing, Wedge
from reportlab.graphics.widgetbase import TypedPropertyCollection
from reportlab.graphics.charts.piecharts import AbstractPieChart, WedgeProperties, _addWedgeLabel, fixLabelOverlaps
from functools import reduce

class SectorProperties(WedgeProperties):
    """This holds descriptive information about the sectors in a doughnut chart.

    It is not to be confused with the 'sector itself'; this just holds
    a recipe for how to format one, and does not allow you to hack the
    angles.  It can format a genuine Sector object for you with its
    format method.
    """
    _attrMap = AttrMap(BASE=WedgeProperties,
            )

class Doughnut(AbstractPieChart):
    _attrMap = AttrMap(
        x = AttrMapValue(isNumber, desc='X position of the chart within its container.'),
        y = AttrMapValue(isNumber, desc='Y position of the chart within its container.'),
        width = AttrMapValue(isNumber, desc='width of doughnut bounding box. Need not be same as width.'),
        height = AttrMapValue(isNumber, desc='height of doughnut bounding box.  Need not be same as height.'),
        data = AttrMapValue(EitherOr((isListOfNoneOrNumber,isListOfListOfNoneOrNumber)), desc='list of numbers defining sector sizes; need not sum to 1'),
        labels = AttrMapValue(isListOfStringsOrNone, desc="optional list of labels to use for each data point"),
        startAngle = AttrMapValue(isNumber, desc="angle of first slice; like the compass, 0 is due North"),
        direction = AttrMapValue(OneOf('clockwise', 'anticlockwise'), desc="'clockwise' or 'anticlockwise'"),
        slices = AttrMapValue(None, desc="collection of sector descriptor objects"),
        simpleLabels = AttrMapValue(isBoolean, desc="If true(default) use String not super duper WedgeLabel"),
        # advanced usage
        checkLabelOverlap = AttrMapValue(isBoolean, desc="If true check and attempt to fix\n standard label overlaps(default off)",advancedUsage=1),
        sideLabels = AttrMapValue(isBoolean, desc="If true attempt to make chart with labels along side and pointers", advancedUsage=1),
        innerRadiusFraction = AttrMapValue(isNumberOrNone,
                desc='None or the fraction of the radius to be used as the inner hole.\nIf not a suitable default will be used.'),
        labelClass=AttrMapValue(NoneOr(isCallable), desc="A class factory to use for non simple labels"),
        )

    def __init__(self):
        self.x = 0
        self.y = 0
        self.width = 100
        self.height = 100
        self.data = [1,1]
        self.labels = None  # or list of strings
        self.startAngle = 90
        self.direction = "clockwise"
        self.simpleLabels = 1
        self.checkLabelOverlap = 0
        self.sideLabels = 0
        self.innerRadiusFraction = None

        self.slices = TypedPropertyCollection(SectorProperties)
        self.slices[0].fillColor = colors.darkcyan
        self.slices[1].fillColor = colors.blueviolet
        self.slices[2].fillColor = colors.blue
        self.slices[3].fillColor = colors.cyan
        self.slices[4].fillColor = colors.pink
        self.slices[5].fillColor = colors.magenta
        self.slices[6].fillColor = colors.yellow


    def demo(self):
        d = Drawing(200, 100)

        dn = Doughnut()
        dn.x = 50
        dn.y = 10
        dn.width = 100
        dn.height = 80
        dn.data = [10,20,30,40,50,60]
        dn.labels = ['a','b','c','d','e','f']

        dn.slices.strokeWidth=0.5
        dn.slices[3].popout = 10
        dn.slices[3].strokeWidth = 2
        dn.slices[3].strokeDashArray = [2,2]
        dn.slices[3].labelRadius = 1.75
        dn.slices[3].fontColor = colors.red
        dn.slices[0].fillColor = colors.darkcyan
        dn.slices[1].fillColor = colors.blueviolet
        dn.slices[2].fillColor = colors.blue
        dn.slices[3].fillColor = colors.cyan
        dn.slices[4].fillColor = colors.aquamarine
        dn.slices[5].fillColor = colors.cadetblue
        dn.slices[6].fillColor = colors.lightcoral

        d.add(dn)
        return d

    def normalizeData(self, data=None):
        from operator import add
        sum = float(reduce(add,data,0))
        return abs(sum)>=1e-8 and list(map(lambda x,f=360./sum: f*x, data)) or len(data)*[0]

    def makeSectors(self):
        # normalize slice data
        data = self.data
        multi = isListOfListOfNoneOrNumber(data)
        if multi:
            #it's a nested list, more than one sequence
            normData = []
            n = []
            for l in data:
                t = self.normalizeData(l)
                normData.append(t)
                n.append(len(t))
            self._seriesCount = max(n)
        else:
            normData = self.normalizeData(data)
            n = len(normData)
            self._seriesCount = n

        #labels
        checkLabelOverlap = self.checkLabelOverlap
        L = []
        L_add = L.append

        labels = self.labels
        if labels is None:
            labels = []
            if not multi:
                labels = [''] * n
            else:
                for m in n:
                    labels = list(labels) + [''] * m
        else:
            #there's no point in raising errors for less than enough labels if
            #we silently create all for the extreme case of no labels.
            if not multi:
                i = n-len(labels)
                if i>0:
                    labels = list(labels) + [''] * i
            else:
                tlab = 0
                for m in n:
                    tlab += m
                i = tlab-len(labels)
                if i>0:
                    labels = list(labels) + [''] * i
        self.labels = labels

        xradius = self.width/2.0
        yradius = self.height/2.0
        centerx = self.x + xradius
        centery = self.y + yradius

        if self.direction == "anticlockwise":
            whichWay = 1
        else:
            whichWay = -1

        g  = Group()

        startAngle = self.startAngle #% 360
        styleCount = len(self.slices)
        irf = self.innerRadiusFraction

        if multi:
            #multi-series doughnut
            ndata = len(data)
            if irf is None:
                yir = (yradius/2.5)/ndata
                xir = (xradius/2.5)/ndata
            else:
                yir = yradius*irf
                xir = xradius*irf
            ydr = (yradius-yir)/ndata
            xdr = (xradius-xir)/ndata
            for sn,series in enumerate(normData):
                for i,angle in enumerate(series):
                    endAngle = (startAngle + (angle * whichWay)) #% 360
                    aa = abs(startAngle-endAngle)
                    if aa<1e-5:
                        startAngle = endAngle
                        continue
                    if startAngle < endAngle:
                        a1 = startAngle
                        a2 = endAngle
                    else:
                        a1 = endAngle
                        a2 = startAngle
                    startAngle = endAngle

                    #if we didn't use %stylecount here we'd end up with the later sectors
                    #all having the default style
                    sectorStyle = self.slices[sn,i%styleCount]

                    # is it a popout?
                    cx, cy = centerx, centery
                    if sectorStyle.popout != 0:
                        # pop out the sector
                        averageAngle = (a1+a2)/2.0
                        aveAngleRadians = averageAngle * pi/180.0
                        popdistance = sectorStyle.popout
                        cx = centerx + popdistance * cos(aveAngleRadians)
                        cy = centery + popdistance * sin(aveAngleRadians)

                    yr1 = yir+sn*ydr
                    yr = yr1 + ydr
                    xr1 = xir+sn*xdr
                    xr = xr1 + xdr
                    if len(series) > 1:
                        theSector = Wedge(cx, cy, xr, a1, a2, yradius=yr, radius1=xr1, yradius1=yr1)
                    else:
                        theSector = Wedge(cx, cy, xr, a1, a2, yradius=yr, radius1=xr1, yradius1=yr1, annular=True)

                    theSector.fillColor = sectorStyle.fillColor
                    theSector.strokeColor = sectorStyle.strokeColor
                    theSector.strokeWidth = sectorStyle.strokeWidth
                    theSector.strokeDashArray = sectorStyle.strokeDashArray

                    shader = sectorStyle.shadingKind
                    if shader:
                        nshades = aa / float(sectorStyle.shadingAngle)
                        if nshades > 1:
                            shader = colors.Whiter if shader=='lighten' else colors.Blacker
                            nshades = 1+int(nshades)
                            shadingAmount = 1-sectorStyle.shadingAmount
                            if sectorStyle.shadingDirection=='normal':
                                dsh = (1-shadingAmount)/float(nshades-1)
                                shf1 = shadingAmount
                            else:
                                dsh = (shadingAmount-1)/float(nshades-1)
                                shf1 = 1
                            shda = (a2-a1)/float(nshades)
                            shsc = sectorStyle.fillColor
                            theSector.fillColor = None
                            for ish in range(nshades):
                                sha1 = a1 + ish*shda
                                sha2 = a1 + (ish+1)*shda
                                shc = shader(shsc,shf1 + dsh*ish)
                                if len(series)>1:
                                    shSector = Wedge(cx, cy, xr, sha1, sha2, yradius=yr, radius1=xr1, yradius1=yr1)
                                else:
                                    shSector = Wedge(cx, cy, xr, sha1, sha2, yradius=yr, radius1=xr1, yradius1=yr1, annular=True)
                                shSector.fillColor = shc
                                shSector.strokeColor = None
                                shSector.strokeWidth = 0
                                g.add(shSector)

                    g.add(theSector)

                    if sn == 0 and sectorStyle.visible and sectorStyle.label_visible:
                        text = self.getSeriesName(i,'')
                        if text:
                            averageAngle = (a1+a2)/2.0
                            aveAngleRadians = averageAngle*pi/180.0
                            labelRadius = sectorStyle.labelRadius
                            rx = xradius*labelRadius
                            ry = yradius*labelRadius
                            labelX = centerx + (0.5 * self.width * cos(aveAngleRadians) * labelRadius)
                            labelY = centery + (0.5 * self.height * sin(aveAngleRadians) * labelRadius)
                            l = _addWedgeLabel(self,text,averageAngle,labelX,labelY,sectorStyle)
                            if checkLabelOverlap:
                                l._origdata = { 'x': labelX, 'y':labelY, 'angle': averageAngle,
                                            'rx': rx, 'ry':ry, 'cx':cx, 'cy':cy,
                                            'bounds': l.getBounds(),
                                            }
                            L_add(l)

        else:
            #single series doughnut
            if irf is None:
                yir = yradius/2.5
                xir = xradius/2.5
            else:
                yir = yradius*irf
                xir = xradius*irf
            for i,angle in enumerate(normData):
                endAngle = (startAngle + (angle * whichWay)) #% 360
                aa = abs(startAngle-endAngle)
                if aa<1e-5:
                    startAngle = endAngle
                    continue
                if startAngle < endAngle:
                    a1 = startAngle
                    a2 = endAngle
                else:
                    a1 = endAngle
                    a2 = startAngle
                startAngle = endAngle

                #if we didn't use %stylecount here we'd end up with the later sectors
                #all having the default style
                sectorStyle = self.slices[i%styleCount]

                # is it a popout?
                cx, cy = centerx, centery
                if sectorStyle.popout != 0:
                    # pop out the sector
                    averageAngle = (a1+a2)/2.0
                    aveAngleRadians = averageAngle * pi/180.0
                    popdistance = sectorStyle.popout
                    cx = centerx + popdistance * cos(aveAngleRadians)
                    cy = centery + popdistance * sin(aveAngleRadians)

                if n > 1:
                    theSector = Wedge(cx, cy, xradius, a1, a2, yradius=yradius, radius1=xir, yradius1=yir)
                elif n==1:
                    theSector = Wedge(cx, cy, xradius, a1, a2, yradius=yradius, radius1=xir, yradius1=yir, annular=True)

                theSector.fillColor = sectorStyle.fillColor
                theSector.strokeColor = sectorStyle.strokeColor
                theSector.strokeWidth = sectorStyle.strokeWidth
                theSector.strokeDashArray = sectorStyle.strokeDashArray

                shader = sectorStyle.shadingKind
                if shader:
                    nshades = aa / float(sectorStyle.shadingAngle)
                    if nshades > 1:
                        shader = colors.Whiter if shader=='lighten' else colors.Blacker
                        nshades = 1+int(nshades)
                        shadingAmount = 1-sectorStyle.shadingAmount
                        if sectorStyle.shadingDirection=='normal':
                            dsh = (1-shadingAmount)/float(nshades-1)
                            shf1 = shadingAmount
                        else:
                            dsh = (shadingAmount-1)/float(nshades-1)
                            shf1 = 1
                        shda = (a2-a1)/float(nshades)
                        shsc = sectorStyle.fillColor
                        theSector.fillColor = None
                        for ish in range(nshades):
                            sha1 = a1 + ish*shda
                            sha2 = a1 + (ish+1)*shda
                            shc = shader(shsc,shf1 + dsh*ish)
                            if n > 1:
                                shSector = Wedge(cx, cy, xradius, sha1, sha2, yradius=yradius, radius1=xir, yradius1=yir)
                            elif n==1:
                                shSector = Wedge(cx, cy, xradius, sha1, sha2, yradius=yradius, radius1=xir, yradius1=yir, annular=True)
                            shSector.fillColor = shc
                            shSector.strokeColor = None
                            shSector.strokeWidth = 0
                            g.add(shSector)

                g.add(theSector)

                # now draw a label
                if labels[i] and sectorStyle.visible and sectorStyle.label_visible:
                    averageAngle = (a1+a2)/2.0
                    aveAngleRadians = averageAngle*pi/180.0
                    labelRadius = sectorStyle.labelRadius
                    labelX = centerx + (0.5 * self.width * cos(aveAngleRadians) * labelRadius)
                    labelY = centery + (0.5 * self.height * sin(aveAngleRadians) * labelRadius)
                    rx = xradius*labelRadius
                    ry = yradius*labelRadius
                    l = _addWedgeLabel(self,labels[i],averageAngle,labelX,labelY,sectorStyle)
                    if checkLabelOverlap:
                        l._origdata = { 'x': labelX, 'y':labelY, 'angle': averageAngle,
                                        'rx': rx, 'ry':ry, 'cx':cx, 'cy':cy,
                                        'bounds': l.getBounds(),
                                        }
                    L_add(l)

        if checkLabelOverlap and L:
            fixLabelOverlaps(L)

        for l in L: g.add(l)

        return g

    def draw(self):
        g = Group()
        g.add(self.makeSectors())
        return g


def sample1():
    "Make up something from the individual Sectors"

    d = Drawing(400, 400)
    g = Group()

    s1 = Wedge(centerx=200, centery=200, radius=150, startangledegrees=0, endangledegrees=120, radius1=100)
    s1.fillColor=colors.red
    s1.strokeColor=None
    d.add(s1)
    s2 = Wedge(centerx=200, centery=200, radius=150, startangledegrees=120, endangledegrees=240, radius1=100)
    s2.fillColor=colors.green
    s2.strokeColor=None
    d.add(s2)
    s3 = Wedge(centerx=200, centery=200, radius=150, startangledegrees=240, endangledegrees=260, radius1=100)
    s3.fillColor=colors.blue
    s3.strokeColor=None
    d.add(s3)
    s4 = Wedge(centerx=200, centery=200, radius=150, startangledegrees=260, endangledegrees=360, radius1=100)
    s4.fillColor=colors.gray
    s4.strokeColor=None
    d.add(s4)

    return d

def sample2():
    "Make a simple demo"

    d = Drawing(400, 400)

    dn = Doughnut()
    dn.x = 50
    dn.y = 50
    dn.width = 300
    dn.height = 300
    dn.data = [10,20,30,40,50,60]

    d.add(dn)

    return d

def sample3():
    "Make a more complex demo"

    d = Drawing(400, 400)
    dn = Doughnut()
    dn.x = 50
    dn.y = 50
    dn.width = 300
    dn.height = 300
    dn.data = [[10,20,30,40,50,60], [10,20,30,40]]
    dn.labels = ['a','b','c','d','e','f']

    d.add(dn)

    return d

def sample4():
    "Make a more complex demo with Label Overlap fixing"

    d = Drawing(400, 400)
    dn = Doughnut()
    dn.x = 50
    dn.y = 50
    dn.width = 300
    dn.height = 300
    dn.data = [[10,20,30,40,50,60], [10,20,30,40]]
    dn.labels = ['a','b','c','d','e','f']
    dn.checkLabelOverlap = True

    d.add(dn)

    return d

if __name__=='__main__':

    from reportlab.graphics.renderPDF import drawToFile
    d = sample1()
    drawToFile(d, 'doughnut1.pdf')
    d = sample2()
    drawToFile(d, 'doughnut2.pdf')
    d = sample3()
    drawToFile(d, 'doughnut3.pdf')
