#!/usr/bin/python
# Copyright (c) 2013 SUSE Linux Products GmbH
# Author: Ludwig Nussel
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

from Tkinter import *
from PIL import Image, ImageTk
import json
import optparse
import sys
import shutil
from os.path import basename
from pprint import pprint

parser = optparse.OptionParser()
parser.add_option("--new", metavar="NAME", help="create new")
parser.add_option("--tag", metavar="NAME", action='append', help="add tag")

(options, args) = parser.parse_args()

filename = args[0]
if filename.endswith('.png'):
	png = filename
	filename = filename[0:len(filename)-len(".png")]+'.json'
	needle = json.loads("""{
	    "tags": [ "FIXME" ],
	    "area": [ { "height": 100, "width": 100,
	    "xpos": 0, "ypos": 0, "type": "match" } ]
	}""")
elif filename.endswith('.json'):
	png = filename[0:len(filename)-len(".json")]+'.png'
	needle = json.load(open(filename))

else:
	print "Error: needs to end in .png or .json"
	sys.exit(0)

if options.tag:
	needle['tags'] = options.tag

print json.dumps(needle, sort_keys=True, indent=4, separators=(',', ': '))

master = Tk()
master.title(basename(filename)[0:len(filename)-len(".json")])

image = Image.open(png)
photo = ImageTk.PhotoImage(image)

width = photo.width()
height = photo.height()

w = Canvas(master, width=width, height=height)
w.pack()

bg = w.create_image(0, 0, anchor=NW, image=photo)

uiareas = []

class UiArea:
    def __init__(self, w, area):
	self.color = "cyan"
	self.w = w
	self.rect = w.create_rectangle(area['xpos'],
		area['ypos'], area['xpos'] + area['width'],
		area['ypos'] + area['height'],
		outline=self.color)
	self.text = w.create_text(area['xpos'] + area['width'], area['ypos'] + area['height'],
		anchor="se", text=area['type'],
		fill=self.color)
	self.line = None
	self._update_exclude(area)

    def _update_exclude(self, area):
	if area['type'] == 'exclude' and self.line is None:
	    self.line = w.create_line(area['xpos'],
		    area['ypos'] + area['height'], area['xpos'] + area['width'],
		    area['ypos'],
		    fill=self.color)
	if area['type'] != 'exclude' and self.line is not None:
	    self.w.delete(self.line)
	    self.line = None

    def setcolor(self, color):
	self.color = color
	self.w.itemconfig(self.rect, outline=color)
	self.w.itemconfig(self.text, fill=color)
	if self.line is not None:
	    self.w.itemconfig(self.line, fill=color)

    def updatearea(self, area):
	self.w.coords(self.rect, area['xpos'], area['ypos'],
		area['xpos'] + area['width'],
		area['ypos'] + area['height'])
	self.w.coords(self.text, area['xpos'] + area['width'], area['ypos'] + area['height'])
	if self.line:
	    self.w.coords(self.line, area['xpos'], area['ypos'] + area['height'],
		    area['xpos'] + area['width'],
		    area['ypos'])

    def updatetype(self, area):
	self.w.itemconfig(self.text, text=area['type'])
	self._update_exclude(area)

    def destroy(self):
	self.w.delete(self.rect)
	self.w.delete(self.text)
	if self.line is not None:
	    self.w.delete(self.line)


for area in needle['area']:
    # make sure we have ints
    for s in ('xpos', 'ypos', 'width', 'height'):
	area[s] = int(area[s])
    uiareas.append(UiArea(w, area))

rect = 0

def selectarea():
    global uiareas, rect, area

    print "highlighting %d"%rect

    area = needle['area'][rect]
    for r in range(0, len(uiareas)):
	color = "green"
	if r == rect:
	    color = "cyan"
	uiareas[r].setcolor(color)

selectarea()

incr = 5

def resize(arg):
	if arg.keysym == 'Right':
		if width - area['xpos'] - area['width'] >= incr:
			area['width'] = area['width'] + incr
		elif area['width'] > incr:
			area['xpos'] = area['xpos'] + incr
			area['width'] = area['width'] - incr
	elif arg.keysym == 'Left':
		if area['width'] > incr:
			area['width'] = area['width'] - incr
	elif arg.keysym == 'Down':
		if height - area['ypos'] - area['height'] >= incr:
			area['height'] = area['height'] + incr
		elif area['height'] > incr:
			area['ypos'] = area['ypos'] + incr
			area['height'] = area['height'] - incr
	elif arg.keysym == 'Up':
		if area['height'] > incr:
			area['height'] = area['height'] - incr

	uiareas[rect].updatearea(area)

def move(arg):
	if arg.keysym == 'Right':
		if width - area['xpos'] - area['width'] >= incr:
			area['xpos'] = area['xpos'] + incr
	elif arg.keysym == 'Left':
		if area['xpos'] >= incr:
			area['xpos'] = area['xpos'] - incr
	elif arg.keysym == 'Down':
		if height - area['ypos'] - area['height'] >= incr:
			area['ypos'] = area['ypos'] + incr
	elif arg.keysym == 'Up':
		if area['ypos'] >= incr:
			area['ypos'] = area['ypos'] - incr

	uiareas[rect].updatearea(area)

def switch(arg):
	global rect
	rect = (rect + 1) % len(uiareas)
	selectarea()

def addrect(arg):
	global rect, area, uiareas, needle
	rect=len(needle['area'])
	needle['area'].append({ "height": 100, "width": 100,
		"xpos": 0, "ypos": 0, "type": "match" })
	area = needle['area'][rect]
	uiareas.append(UiArea(w, area))

	selectarea()

def delrect(arg):
	global rect, area, uiareas, needle
	if len(uiareas) <= 1:
	    return
	del needle['area'][rect]
	uiareas[rect].destroy()
	a = []
	for r in range(0, len(uiareas)):
	    if r == rect:
		continue
	    a.append(uiareas[r])
	uiareas = a;
	rect = rect % len(uiareas)
	selectarea()

def changetype(arg):
	types = ('match', 'exclude', 'ocr')
	global rect, area, uiareas, needle
	area['type'] = types[(types.index(area['type'])+1)%len(types)]
	uiareas[rect].updatetype(area)

def increment(arg):
	global incr
	if arg.keysym == 'plus':
		if incr < 100:
			incr = incr + 1
			print "increment changed to %d"%incr
	elif arg.keysym == 'minus':
		if incr > 1:
			incr = incr - 1
			print "increment changed to %d"%incr

def quit(arg):
	print "quit without saving"
	print json.dumps(needle, sort_keys=True, indent=4, separators=(',', ': '))
	master.quit()

def save_quit(arg):
	global filename
	if options.new:
		from os import environ
		if not 'CASEDIR' in environ:
		    environ['CASEDIR'] = 'distri/opensuse'
		pat = environ['CASEDIR']+"/needles/%s.%s"
		shutil.copyfile(png, pat%(options.new, 'png'))
		filename = pat%(options.new, 'json')
	json.dump(needle, open(filename, 'w'), sort_keys=True, indent=4, separators=(',', ': '))
	print "saved %s"%filename
	master.quit()

master.bind('<Shift-Up>', resize)
master.bind('<Shift-Down>', resize)
master.bind('<Shift-Left>', resize)
master.bind('<Shift-Right>', resize)
master.bind('<Up>', move)
master.bind('<Down>', move)
master.bind('<Left>', move)
master.bind('<Right>', move)
master.bind('+', increment)
master.bind('-', increment)
master.bind('s', save_quit)
master.bind('q', quit)
master.bind('<Escape>', quit)
master.bind('<Tab>', switch)
master.bind('<Insert>', addrect)
master.bind('<Delete>', delrect)
master.bind('t', changetype)

print """Use cursor keys to move
Use shift + cursor keys to resize
t = change type
ins = add area, del = remove area
s = save, q = quit
"""
master.mainloop()