from xbotlib import Bot
import json
import jinja2
import re

db = 'storage.json'

def readdb():
    storage = open(db, 'r').read()
    messages = json.loads(storage)
    lastid = sorted(list(messages.keys()))
    nextid = str(int(lastid[-1])+1)
    return messages

def writedb(message):
    try:
        with open(db, 'r') as storage:
            messages = json.loads(storage.read())
            if messages.keys():
                keys = [int(x) for x in messages.keys()]
                keys.sort()
                lastid = keys[-1]
                nextid = lastid + 1
            else:
                nextid = 0
            messages[f'{ nextid }'] = message
        storage = open(db, 'w')
        storage.write(json.dumps(messages, indent=4))
    except IOError:
        with open(db, 'w') as storage:
            storage.write(json.dumps('{}'))
            writedb(message)
    return messages

def deletefromdb(id):
    with open(db, 'r') as storage:
        messages = json.loads(storage.read())   
    del messages[id]
    storage = open(db, 'w')
    storage.write(json.dumps(messages, indent=4))
    return messages

def writelog(messages):
    template = jinja2.Template(open('index.html.j2').read())
    with open('index.html','w') as out:
        html = template.render(messages=messages)
        out.write(html)

class logbot(Bot):

    help = '''Oh dear, logbot is here!

@delete <num>
Delete posts from the log. 
For example: @logbot @delete 5

@bots
To see who is around :)

@uptime
To check how long @logbot has been around

@help
Print this message
'''

    def group(self, message):
        print(message.content)
        messages = readdb()

        if message.url:
            messages = writedb(f'<img src="{ message.url }">')
            reply = 'Thanks for that image!'

        elif '@delete' in message.text:
            match = re.findall("@delete \d*", message.content)[0]
            id = match.replace('@delete ','')
            if id in messages:
                print('To be deleted:', messages[str(id)])
                reply = f'This message is deleted: { messages[str(id)] }'
                messages = deletefromdb(id)
            else:
                reply = 'This message is already gone!'

        elif '@help' in message.text:
            print('HELP')

        else:
            messages = writedb(message.text)
            reply = 'Added, thanks!'
    
        writelog(messages)
        return self.reply(reply, room=message.room)

logbot()