import os
import sys
import re
from PIL import Image, ImageDraw, ImageFont
from PyQt5.QtWidgets import *
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtCore import QEvent

from datetime import datetime
from os.path import getmtime

DEFAULT_ARTIST = "Taewoo Lee (anyzac.ltw@gmail.com)"
DEFAULT_COPYRIGHT = "(C) AZ/GG/SKB/DW"
DEFAULT_COMMENT = "No comment.\nAll copyrights are auto-generated."
DEFAULT_FONT = './arial.ttf'
TITLE_FONT_SIZE = 0.02
COPYRIGHT_FONT_SIZE = 0.01
COMMENT_FONT_SIZE = 0.01
MARGIN_RATE = 0.05 # ex) height * 0.05

# 파일명에 이미 날짜가 들어가 있는 경우의 처리
def filename_has_date(filePath):
	'파일명 앞에 yyymmdd 형태의 날짜가 적혀져 있으면 True를 리턴한다'
	yyyymmdd_re = re.compile('[0-9]{8}_.*')
	filename = os.path.splitext(os.path.basename(filePath))[0]
	if yyyymmdd_re.match(filename):
		return True
	else:
		return False

def stamp(filePath, artist, comment, copyright, logger):
	try:
		img = Image.open(filePath)
	except:
		logger.log('%s 는 이미지 파일이 아닙니다.' % filePath)
		return

	# 배경색을 얻는다.
	bg_color = img.getpixel( (0,0) )
	fg_color = (255-bg_color[0], 255-bg_color[1], 255-bg_color[2], 255)

	_orgn_bbox = img.getbbox()
	_orgn_width = _orgn_bbox[2]
	_orgn_height = _orgn_bbox[3]

	# 여백 계산
	margin_v = round(_orgn_height * MARGIN_RATE)
	margin = {
		'top': margin_v,
		'left': 0,
		'right': 0,
		'bottom': round(margin_v * 0.5)
	}

	# 여백을 포함하여 Crop 하기
	crop_bbox = (
		_orgn_bbox[0] - margin['left'],
		_orgn_bbox[1] - margin['top'],
		_orgn_bbox[2] + margin['right'],
		_orgn_bbox[3] + margin['bottom']
		)
	img = img.crop(crop_bbox)

	# Crop 이후
	bbox = img.getbbox()
	# fix bbox !!
	bbox = (bbox[0], bbox[1]-margin['top'], bbox[2], bbox[3]+margin['bottom'])
	top_area = ( 0, 0, bbox[2], margin['top'] )
	bottom_area = ( 0, bbox[3] - margin['bottom'], bbox[2], bbox[3] )

	draw = ImageDraw.Draw(img)
	draw.rectangle(top_area, outline=None, fill=bg_color)
	draw.rectangle(bottom_area, outline=None, fill=bg_color)

	# 폰트 사이즈 결정
	title_fnt_size = round(min(_orgn_width, _orgn_height) * TITLE_FONT_SIZE)
	title_fnt = ImageFont.truetype(DEFAULT_FONT, title_fnt_size)

	copyright_fnt_size = round(min(_orgn_width, _orgn_height) * COPYRIGHT_FONT_SIZE)
	copyright_fnt = ImageFont.truetype(DEFAULT_FONT, copyright_fnt_size)

	comment_fnt_size = round(min(_orgn_width, _orgn_height) * COMMENT_FONT_SIZE)
	comment_fnt = ImageFont.truetype(DEFAULT_FONT, comment_fnt_size)

	# 타이틀 그리기
	title_text = ''
	if filename_has_date(filePath):
		title_text = '[%s]' % os.path.splitext(os.path.basename(filePath))[0]
	else:
		yyyymmdd = datetime.fromtimestamp(getmtime(filePath)).strftime('%Y%m%d')
		filename = os.path.splitext( os.path.basename(filePath) )[0]
		title_text = '[%s_%s]' % (yyyymmdd, filename)
	draw.text((50,50), title_text, font=title_fnt, fill=fg_color )

	# 카피 라이트 그리기
	copyright_text = copyright
	copyright_w, copyright_h = draw.textsize(copyright_text, copyright_fnt)
	copyright_x = round(_orgn_width/2 - copyright_w/2)
	copyright_y = bbox[3] - margin['bottom'] + round(copyright_h/2)
	draw.text( (copyright_x, copyright_y), copyright_text, font=copyright_fnt, fill=fg_color )

	# 추가 정보 그리기
	add_text = 'Artist: %s\nComment:\n%s' % (artist, comment)
	add_text_w, add_text_h = draw.textsize(add_text, comment_fnt)
	add_text_x = bbox[2] - add_text_w - 50
	add_text_y = bbox[0] + 50
	draw.text( (add_text_x, add_text_y), add_text, font=comment_fnt, fill=fg_color )

	# 저장하기
	pre, ext = os.path.splitext(filePath)
	output = pre + '_Sealed.png'
	try:
		img.save(output)
	except:
		logger.log('%s 저장에 실패했습니다.' % filePath)
		return
	logger.log('%s 성공.' % filePath)

class FileListView(QListWidget):
	def __init__(self, parent):
		super().__init__(parent)
		self.setAcceptDrops(True)

	def dragEnterEvent(self, event):
		if event.mimeData().hasUrls():
			event.accept()
		else:
			event.ignore()

	def dragMoveEvent(self, event):
		event.accept()

	def dropEvent(self, event):
		if event.mimeData().hasUrls():
			event.accept()
			for url in event.mimeData().urls():
				filePath = str(url.toLocalFile())
				self.addItem(filePath)
		else:
			event.ignore()

	def removeSelected(self):
		for item in self.selectedItems():
			n = self.row(item)
			self.takeItem(n)

	def getFileList(self):
		result = []
		max = self.count()
		for i in range(max):
			item = self.item(i)
			result.append(item.text())
		return result

class CopyrighterWindow(QWidget):
	def __init__(self):
		super().__init__()
		self.setWindowTitle("Copyrighter")
		self.setGeometry(300, 300, 900, 450)

		self.hLayout = QHBoxLayout()
		self.setLayout(self.hLayout)

		# Left VLayout
		self.vLayout = QVBoxLayout()
		self.hLayout.addLayout(self.vLayout)

		# Right VLayout
		self.vLayoutR = QVBoxLayout()
		self.hLayout.addLayout(self.vLayoutR)
		self.logForm = QPlainTextEdit('', self)
		self.vLayoutR.addWidget(self.logForm)

		# Files list
		self.fileListView = FileListView(self)
		self.vLayout.addWidget(self.fileListView)

		# Remove File Button
		self.removeFileButton = QPushButton("Remove", self)
		self.removeFileButton.clicked.connect(self.fileListView.removeSelected)
		self.vLayout.addWidget(self.removeFileButton)

		# Grid Layout
		self.gridLayout = QGridLayout()
		self.vLayout.addLayout(self.gridLayout)

		# Title Form
		self.titleCheckbox = QCheckBox("Title", self)
		self.titleCheckbox.setChecked(True)
		# self.titleForm = QLineEdit("", self)
		self.gridLayout.addWidget(self.titleCheckbox,0,0)
		# self.gridLayout.addWidget(self.titleForm,0,1)

		# Artist Form
		self.artistCheckbox = QCheckBox("Artist", self)
		self.artistCheckbox.setChecked(True)
		self.artistForm = QLineEdit(DEFAULT_ARTIST)
		self.gridLayout.addWidget(self.artistCheckbox,1,0)
		self.gridLayout.addWidget(self.artistForm,1,1)

		# Copyright Form
		self.copyrightCheckbox = QCheckBox("Copyright", self)
		self.copyrightCheckbox.setChecked(True)
		self.copyrightForm = QLineEdit(DEFAULT_COPYRIGHT, self)
		self.gridLayout.addWidget(self.copyrightCheckbox,2,0)
		self.gridLayout.addWidget(self.copyrightForm,2,1)

		# Comment Form
		self.commentCheckbox = QCheckBox("Comment", self)
		self.commentCheckbox.setChecked(True)
		# self.commentForm = QLineEdit(DEFAULT_COMMENT, self)
		self.commentForm = QPlainTextEdit(DEFAULT_COMMENT, self)
		self.gridLayout.addWidget(self.commentCheckbox,3,0)
		self.gridLayout.addWidget(self.commentForm,3,1)

		# Start Button
		self.startButton = QPushButton("Start", self)
		self.startButton.clicked.connect(self.startButtonClicked)
		self.vLayout.addWidget(self.startButton)

	def drawTitleCheckboxChanged(self):
		if self.drawTitleCheckbox.isChecked() == True:
			QMessageBox.about(self, "Info", "Checked")

	def startButtonClicked(self):
		self.run()

	def log(self, text):
		self.logForm.insertPlainText(text + '\n')

	def run(self):
		# self.title = filename
		artist = self.artistForm.text()
		comment = self.commentForm.toPlainText()
		copyright = self.copyrightForm.text()
		files = self.fileListView.getFileList()
		for file in files:
			stamp(file, artist, comment, copyright, self)

if __name__ == "__main__":
	app = QApplication(sys.argv)
	win = CopyrighterWindow()
	win.show()
	app.exec_()