from urllib.request import urlopen
from urllib.parse import urlencode
import os, json
from time import sleep
import jinja2

def ep(fn, api_url, api_key, **data):
    d = {}
    d['apikey'] = api_key
    for key in data:
        d[key] = data[key]
    return json.load(urlopen(f"{api_url}{fn}", data=urlencode(d).encode()))

with open("/srv/etherpad-lite/APIKEY.txt") as f:
    api_key = f.read()
api_url = "https://hub.vvvvvvaria.org/rosa/pad/api/1.2.15/"
pad_url = "https://hub.vvvvvvaria.org/rosa/pad/p/"

nickname = "folding"

author = ep("createAuthor", api_url, api_key, name=nickname)
author_id = author["data"]["authorID"]

all_pads = ep("listAllPads", api_url, api_key)
all_pads = all_pads["data"]["padIDs"]

db_filename = "folding.json"

# Make database json file when it does not exist yet
if not os.path.exists(db_filename):
	with open(db_filename, "w") as out:
		db = { 'messages' : [] }
		out.write(json.dumps(db, indent=4))
		out.close()

# Read db
db_file = open(db_filename).read()
db = json.loads(db_file)

while True:
	for pad in all_pads:

		# Get the current chat_head of this pad
		chat_head_data = ep("getChatHead", api_url, api_key, padID=pad)
		chat_head = chat_head_data["data"]["chatHead"]

		# If this pad is not in the database yet
		if not pad in db:

			# Then create an entry for this pad
			db[pad] = chat_head

		# Read latest chat_head from db
		latest_chat_head = db[pad]

		# If the last chat_head is lower then the current one
		if int(latest_chat_head) < chat_head:

			# Check how many messages have been sent
			num_of_messages = chat_head - int(latest_chat_head)
			print(num_of_messages)

			# Get latest num message(s)
			chat_history = ep("getChatHistory", api_url, api_key, padID=pad)
			print(chat_history)

			# Loop through the last num_of_messages
			for num in range(num_of_messages):
				print('------------')
				num = num_of_messages - num
				last_message = chat_history["data"]["messages"][-num]["text"]
				last_author_id = chat_history["data"]["messages"][-num]["userId"]
				last_author_name = chat_history["data"]["messages"][-num]["userName"]
				last_timestamp = chat_history["data"]["messages"][-num]["time"]
				print(num, last_message)

				# If the bot is called, using @bot
				if "<fold>" in last_message:

					# Say that the message is folded
					reply = f"{ last_author_name }, your message is folded onto the resonance board."
					ep("appendChatMessage", api_url, api_key, padID=pad, text=reply, authorID=author_id)

					# Store the message in the list folds
					message = last_message.replace("<fold>", "")
					message = f"<b>folding from <a href='{ pad_url }{ pad }'>{ pad }</a> by { last_author_name }</b>: { message }"
					db['messages'].append(message)

			# Update the db with the latest chat_head
			db[pad] = str(chat_head)

		sleep(5)

	# Write the db back to file
	with open(db_filename, "w") as db_out:
		db_out.write(json.dumps(db, indent=4))

	# Save the message to a .html file using a jinja template
	template = jinja2.Template(open("/srv/folds/templates/folds.html").read())
	html = template.render(folds=db["messages"])
	with open("/var/www/html/folds.html", "w") as out:
		out.write(html)

	# Pause 60 seconds between each loop through all the pads
	sleep(60)