#
# encoding: UTF-8
# api: streamtuner2
# type: class
# title: global config object
# description: reads ~/.config/streamtuner/*.json files
# config: {type:var, name:z, description:v}
#
# In the main application or module files which need access
# to a global conf.* object, just import this module as follows:
#
#   from config import *
#
# Here conf is already an instantiation of the underlying
# ConfigDoct class.
#
# Also provides the logging function __print__, and basic
# plugin handling code: plugin_meta() and module_list(),
# and the relative get_data() alias (files from pyzip/path).
#


import os
import sys
import json
import gzip
import platform
import re
import zipfile
import inspect
import pkgutil


# export symbols
__all__ = ["conf", "__print__", "dbg", "plugin_meta", "module_list", "get_data"]


#-- create a stub instance of config object
conf = object()

# separate instance of netrc, if needed
netrc = None




# Global configuration store
#
# Autointializes itself on startup, makes conf.vars available.
# Also provides .load() and .save() for JSON data/cache files.
#
class ConfigDict(dict):


    # start
    def __init__(self):
    
        # object==dict means conf.var is conf["var"]

            except:
                pass
        for server in varhosts:
            if server in netrc:
                return netrc[server]
        


# Retrieve content from install path or pyzip archive (alias for pkgutil.get_data)
#
def get_data(fn, decode=False):
    try:
        bin = pkgutil.get_data("config", fn)
        if decode:
            return bin.decode("utf-8")
        else:
            return str(bin)
    except:
        pass


# Search through ./channels/ and get module basenames.
# Also order them by conf.channel_order
#
def module_list():

    # Should list plugins within zips as well as local paths
    ls = pkgutil.iter_modules([conf.share+"/channels", "channels"])
    ls = [name for loader,name,ispkg in ls]
    
    # resort with tab order
    order = [module.strip() for module in conf.channel_order.lower().replace(".","_").replace("-","_").split(",")]
    ls = [module for module in (order) if (module in ls)] + [module for module in (ls) if (module not in order)]

    return ls



# Plugin meta data extraction
#
# Extremely crude version for Python and streamtuner2 plugin usage.
# Fetches module source, or reads from filename / out of zip package.
#
def plugin_meta(fn=None, src=None, frame=1):

    # get source directly from caller
    if not src and not fn:
        module = inspect.getmodule(sys._getframe(frame))
        fn = inspect.getsourcefile(module)
        src = inspect.getcomments(module)