import numpy as np
from PyQt5 import QtGui, QtCore


def make_selection(parent):
    """ buttons to draw a square on view """
    parent.topbtns = QtGui.QButtonGroup()
    ql = QtGui.QLabel("select cells")
    ql.setStyleSheet("color: white;")
    ql.setFont(QtGui.QFont("Arial", 8, QtGui.QFont.Bold))
    parent.l0.addWidget(ql, 0, 2, 1, 2)
    pos = [2, 3, 4]
    for b in range(3):
        btn = TopButton(b, parent)
        btn.setFont(QtGui.QFont("Arial", 8))
        parent.topbtns.addButton(btn, b)
        parent.l0.addWidget(btn, 0, (pos[b]) * 2, 1, 2)
        btn.setEnabled(False)
    parent.topbtns.setExclusive(True)
    parent.isROI = False
    parent.ROIplot = 0
    ql = QtGui.QLabel("n=")
    ql.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
    ql.setStyleSheet("color: white;")
    ql.setFont(QtGui.QFont("Arial", 8, QtGui.QFont.Bold))
    parent.l0.addWidget(ql, 0, 10, 1, 1)
    parent.topedit = QtGui.QLineEdit(parent)
    parent.topedit.setValidator(QtGui.QIntValidator(0, 500))
    parent.topedit.setText("40")
    parent.ntop = 40
    parent.topedit.setFixedWidth(35)
    parent.topedit.setAlignment(QtCore.Qt.AlignRight)
    parent.topedit.returnPressed.connect(parent.top_number_chosen)
    parent.l0.addWidget(parent.topedit, 0, 11, 1, 1)

# minimize view
def make_cellnotcell(parent):
    """ buttons for cell / not cell views at top """
    # number of ROIs in each image
    parent.lcell0 = QtGui.QLabel("")
    parent.lcell0.setStyleSheet("color: white;")
    parent.lcell0.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
    parent.l0.addWidget(parent.lcell0, 0, 12, 1, 2)
    parent.lcell1 = QtGui.QLabel("")
    parent.lcell1.setStyleSheet("color: white;")
    parent.l0.addWidget(parent.lcell1, 0, 20, 1, 2)

    parent.sizebtns = QtGui.QButtonGroup(parent)
    b = 0
    labels = [" cells", " both", " not cells"]
    for l in labels:
        btn = SizeButton(b, l, parent)
        parent.sizebtns.addButton(btn, b)
        parent.l0.addWidget(btn, 0, 14 + 2 * b, 1, 2)
        btn.setEnabled(False)
        if b == 1:
            btn.setEnabled(True)
        b += 1
    parent.sizebtns.setExclusive(True)

def make_quadrants(parent):
    """ make quadrant buttons """
    parent.quadbtns = QtGui.QButtonGroup(parent)
    for b in range(9):
        btn = QuadButton(b, ' '+str(b+1), parent)
        parent.quadbtns.addButton(btn, b)
        parent.l0.addWidget(btn, 0 + parent.quadbtns.button(b).ypos, 29 + parent.quadbtns.button(b).xpos, 1, 1)
        btn.setEnabled(False)
        b += 1
    parent.quadbtns.setExclusive(True)

class QuadButton(QtGui.QPushButton):
    """ custom QPushButton class for quadrant plotting
        requires buttons to put into a QButtonGroup (parent.quadbtns)
         allows only 1 button to pressed at a time
    """
    def __init__(self, bid, Text, parent=None):
        super(QuadButton,self).__init__(parent)
        self.setText(Text)
        self.setCheckable(True)
        self.setStyleSheet(parent.styleInactive)
        self.setFont(QtGui.QFont("Arial", 8, QtGui.QFont.Bold))
        self.resize(self.minimumSizeHint())
        self.setMaximumWidth(22)
        self.xpos = bid%3
        self.ypos = int(np.floor(bid/3))
        self.clicked.connect(lambda: self.press(parent, bid))
        self.show()
    def press(self, parent, bid):
        for b in range(9):
            if parent.quadbtns.button(b).isEnabled():
                parent.quadbtns.button(b).setStyleSheet(parent.styleUnpressed)
        self.setStyleSheet(parent.stylePressed)
        self.xrange = np.array([self.xpos-.15, self.xpos+1.15]) * parent.ops['Lx']/3
        self.yrange = np.array([self.ypos-.15, self.ypos+1.15]) * parent.ops['Ly']/3
        # change the zoom
        parent.p1.setXRange(self.xrange[0], self.xrange[1])
        parent.p1.setYRange(self.yrange[0], self.yrange[1])
        parent.p2.setXRange(self.xrange[0], self.xrange[1])
        parent.p2.setYRange(self.yrange[0], self.yrange[1])
        parent.p2.setXLink("plot1")
        parent.p2.setYLink("plot1")
        parent.show()


# size of view
class SizeButton(QtGui.QPushButton):
    """ buttons to make trace box bigger or smaller """
    def __init__(self, bid, Text, parent=None):
        super(SizeButton,self).__init__(parent)
        self.setText(Text)
        self.setCheckable(True)
        self.setStyleSheet(parent.styleInactive)
        self.setFont(QtGui.QFont("Arial", 8, QtGui.QFont.Bold))
        self.resize(self.minimumSizeHint())
        self.clicked.connect(lambda: self.press(parent))
        self.bid = bid
        self.show()
    def press(self, parent):
        bid = self.bid
        for b in parent.sizebtns.buttons():
            b.setStyleSheet(parent.styleUnpressed)
        self.setStyleSheet(parent.stylePressed)
        ts = 100
        if bid==0:
            parent.p2.linkView(parent.p2.XAxis,view=None)
            parent.p2.linkView(parent.p2.YAxis,view=None)
            parent.win.ci.layout.setColumnStretchFactor(0,ts)
            parent.win.ci.layout.setColumnStretchFactor(1,0)
        elif bid==1:
            parent.win.ci.layout.setColumnStretchFactor(0,ts)
            parent.win.ci.layout.setColumnStretchFactor(1,ts)
            parent.p2.setXLink('plot1')
            parent.p2.setYLink('plot1')
        elif bid==2:
            parent.p2.linkView(parent.p2.XAxis,view=None)
            parent.p2.linkView(parent.p2.YAxis,view=None)
            parent.win.ci.layout.setColumnStretchFactor(0,0)
            parent.win.ci.layout.setColumnStretchFactor(1,ts)
        # only enable selection buttons when not in 'both' view
        if bid!=1:
            if parent.ops_plot['color']!=0:
                for btn in parent.topbtns.buttons():
                    btn.setStyleSheet(parent.styleUnpressed)
                    btn.setEnabled(True)
            else:
                parent.topbtns.button(0).setStyleSheet(parent.styleUnpressed)
                parent.topbtns.button(0).setEnabled(True)
        else:
            parent.ROI_remove()
            for btn in parent.topbtns.buttons():
                btn.setEnabled(False)
                btn.setStyleSheet(parent.styleInactive)
        parent.win.show()
        parent.show()

# 
class TopButton(QtGui.QPushButton):
    """ selection of top neurons"""
    def __init__(self, bid, parent=None):
        super(TopButton,self).__init__(parent)
        text = [' draw selection', ' select top n', ' select bottom n']
        self.bid = bid
        self.setText(text[bid])
        self.setCheckable(True)
        self.setStyleSheet(parent.styleInactive)
        self.setFont(QtGui.QFont("Arial", 8, QtGui.QFont.Bold))
        self.resize(self.minimumSizeHint())
        self.clicked.connect(lambda: self.press(parent))
        self.show()

    def press(self, parent):
        bid = self.bid
        if not parent.sizebtns.button(1).isChecked():
            if parent.ops_plot['color']==0:
                for b in [1,2]:
                    parent.topbtns.button(b).setEnabled(False)
                    parent.topbtns.button(b).setStyleSheet(parent.styleInactive)
            else:
                for b in [1,2]:
                    parent.topbtns.button(b).setEnabled(True)
                    parent.topbtns.button(b).setStyleSheet(parent.styleUnpressed)
        else:
            for b in range(3):
                parent.topbtns.button(b).setEnabled(False)
                parent.topbtns.button(b).setStyleSheet(parent.styleInactive)
        self.setStyleSheet(parent.stylePressed)
        if bid==0:
            parent.ROI_selection()
        else:
            self.top_selection(parent)

    def top_selection(self, parent):
        bid = self.bid
        parent.ROI_remove()
        draw = False
        ncells = len(parent.stat)
        icells = np.minimum(ncells, parent.ntop)
        if bid == 1:
            top = True
        elif bid == 2:
            top = False
        if parent.sizebtns.button(0).isChecked():
            wplot = 0
            draw = True
        elif parent.sizebtns.button(2).isChecked():
            wplot = 1
            draw = True
        if draw:
            if parent.ops_plot['color'] != 0:
                c = parent.ops_plot['color']
                istat = parent.colors['istat'][c]
                if wplot == 0:
                    icell = np.array(parent.iscell.nonzero()).flatten()
                    istat = istat[parent.iscell]
                else:
                    icell = np.array((~parent.iscell).nonzero()).flatten()
                    istat = istat[~parent.iscell]
                inds = istat.argsort()
                if top:
                    inds = inds[-icells:]
                    parent.ichosen = icell[inds[-1]]
                else:
                    inds = inds[:icells]
                    parent.ichosen = icell[inds[0]]
                parent.imerge = []
                for n in inds:
                    parent.imerge.append(icell[n])
                # draw choices
                parent.update_plot()
                parent.show()