from PIL import Image, ImageDraw
from PyQt5.QtGui import QColor, QFont
from PyQt5 import QtGui, QtCore, QtWidgets
import os

from component import Component
from toolkit.frame import FramePainter
from toolkit import rgbFromString, pickColor


class Component(Component):
    name = 'Title Text'
    version = '1.0.0'

    def __init__(self, *args):
        super().__init__(*args)
        self.titleFont = QFont()

    def widget(self, *args):
        super().widget(*args)
        height = int(self.settings.value('outputHeight'))
        width = int(self.settings.value('outputWidth'))
        self.textColor = (255, 255, 255)
        self.title = 'Text'
        self.alignment = 1
        self.fontSize = height / 13.5
        fm = QtGui.QFontMetrics(self.titleFont)
        self.xPosition = width / 2 - fm.width(self.title)/2
        self.yPosition = height / 2 * 1.036

        self.page.comboBox_textAlign.addItem("Left")
        self.page.comboBox_textAlign.addItem("Middle")
        self.page.comboBox_textAlign.addItem("Right")

        self.page.lineEdit_textColor.setText('%s,%s,%s' % self.textColor)
        self.page.pushButton_textColor.clicked.connect(self.pickColor)
        btnStyle = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*self.textColor).name()
        self.page.pushButton_textColor.setStyleSheet(btnStyle)

        self.page.lineEdit_title.setText(self.title)
        self.page.comboBox_textAlign.setCurrentIndex(int(self.alignment))
        self.page.spinBox_fontSize.setValue(int(self.fontSize))
        self.page.spinBox_xTextAlign.setValue(int(self.xPosition))
        self.page.spinBox_yTextAlign.setValue(int(self.yPosition))

        self.page.fontComboBox_titleFont.currentFontChanged.connect(
            self.update
        )
        self.trackWidgets({
            'title': self.page.lineEdit_title,
            'alignment': self.page.comboBox_textAlign,
            'fontSize': self.page.spinBox_fontSize,
            'xPosition': self.page.spinBox_xTextAlign,
            'yPosition': self.page.spinBox_yTextAlign,
        })

    def update(self):
        self.titleFont = self.page.fontComboBox_titleFont.currentFont()
        self.textColor = rgbFromString(
            self.page.lineEdit_textColor.text())
        btnStyle = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*self.textColor).name()
        self.page.pushButton_textColor.setStyleSheet(btnStyle)

        super().update()

    def getXY(self):
        '''Returns true x, y after considering alignment settings'''
        fm = QtGui.QFontMetrics(self.titleFont)
        if self.alignment == 0:             # Left
            x = int(self.xPosition)

        if self.alignment == 1:             # Middle
            offset = int(fm.width(self.title)/2)
            x = self.xPosition - offset

        if self.alignment == 2:             # Right
            offset = fm.width(self.title)
            x = self.xPosition - offset
        return x, self.yPosition

    def loadPreset(self, pr, *args):
        super().loadPreset(pr, *args)

        font = QFont()
        font.fromString(pr['titleFont'])
        self.page.fontComboBox_titleFont.setCurrentFont(font)
        self.page.lineEdit_textColor.setText('%s,%s,%s' % pr['textColor'])
        btnStyle = "QPushButton { background-color : %s; outline: none; }" \
            % QColor(*pr['textColor']).name()
        self.page.pushButton_textColor.setStyleSheet(btnStyle)

    def savePreset(self):
        saveValueStore = super().savePreset()
        saveValueStore['titleFont'] = self.titleFont.toString()
        saveValueStore['textColor'] = self.textColor
        return saveValueStore

    def previewRender(self, previewWorker):
        width = int(self.settings.value('outputWidth'))
        height = int(self.settings.value('outputHeight'))
        return self.addText(width, height)

    def properties(self):
        props = ['static']
        if not self.title:
            props.append('error')
        return props

    def error(self):
        return "No text provided."

    def frameRender(self, layerNo, frameNo):
        width = int(self.settings.value('outputWidth'))
        height = int(self.settings.value('outputHeight'))
        return self.addText(width, height)

    def addText(self, width, height):

        image = FramePainter(width, height)
        self.titleFont.setPixelSize(self.fontSize)
        image.setFont(self.titleFont)
        image.setPen(self.textColor)
        x, y = self.getXY()
        image.drawText(x, y, self.title)

        return image.finalize()

    def pickColor(self):
        RGBstring, btnStyle = pickColor()
        if not RGBstring:
            return
        self.page.lineEdit_textColor.setText(RGBstring)
        self.page.pushButton_textColor.setStyleSheet(btnStyle)

    def commandHelp(self):
        print('Enter a string to use as centred white text:')
        print('    "title=User Error"')
        print('Specify a text color:\n    color=255,255,255')
        print('Set custom x, y position:\n    x=500 y=500')

    def command(self, arg):
        if '=' in arg:
            key, arg = arg.split('=', 1)
            if key == 'color':
                self.page.lineEdit_textColor.setText(arg)
                return
            elif key == 'size':
                self.page.spinBox_fontSize.setValue(int(arg))
                return
            elif key == 'x':
                self.page.spinBox_xTextAlign.setValue(int(arg))
                return
            elif key == 'y':
                self.page.spinBox_yTextAlign.setValue(int(arg))
                return
            elif key == 'title':
                self.page.lineEdit_title.setText(arg)
                return
        super().command(arg)