import json

import config
import os
import sys

class _PadManager:

    def __init__(self):
        self.pads={}
        self.list=[]
        for file in os.listdir(config.PAD_DIRECTORY):
            if file.lower().endswith(".json") or file.lower().endswith(".conf"):
                x=self.test_pad(file)
                if x:
                    self.pads[x] = file
                    self.list.append(x)

    def test_pad(self, file):
        name = None
        try:
            with open(os.path.join(config.PAD_DIRECTORY, file)) as f:
                content=f.read()
                x=json.loads(content)
                if x and "name" in x and x["name"]:
                    return x["name"]
        except:
            pass
        return None

    def read_pad(self, padname):
        file=os.path.join(config.PAD_DIRECTORY, self.pads[padname])
        with open(file) as f:
            return json.loads(f.read())



class PadManager:
    __pm = _PadManager()
    @staticmethod
    def read_pad(name):
        return PadManager.__pm.read_pad(name)

    @staticmethod
    def pad_list():
        return PadManager.__pm.list