#
# encoding: UTF-8
# api: streamtuner2
# type: class
# title: global config object
# description: reads ~/.config/streamtuner/*.json files
# config:
#    { arg: -d,     type: str,      name: disable[], description: Omit plugin from initialization.  }
#    { arg: -e,     type: str,      name: enable[],  description: Add channel plugin.  }
#    { arg: --gtk3, type: boolean,  name: gtk3,      description: Start with Gtk3 interface. }
#    { arg: -D,     type: boolean,  name: debug,     description: Enable debug messages on console }
#    { arg: action, type: str *,    name: action[],  description: CLI interface commands. }
#    { arg: -x,     type: boolean,  name: exit,      hidden: 1 }
# version: 2.5
# priority: core
#
# 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).
#

from __future__ import print_function
import os
import sys
import json
import gzip
import platform
import re
from compat2and3 import gzip_decode, find_executable

        # store defaults in file
        else:
            self.save("settings")
            self.firstrun = 1
        
        # add argv
        self.args = self.init_args(argparse.ArgumentParser())
        self.apply_args(self.args)


    # some defaults
    def defaults(self):
        self.play = {
           "audio/mpeg": self.find_player(),
           "audio/ogg": self.find_player(),

            os.makedirs(self.dir)
       

    # store some configuration list/dict into a file                
    def save(self, name="settings", data=None, gz=0, nice=0):
        name = name + ".json"
        if (data is None):
            data = vars(self)
            if "args" in data:
                data.pop("args")
            nice = 1
        # check for subdir
        if (name.find("/") > 0):
            subdir = name[0:name.find("/")]
            subdir = self.dir + "/" + subdir
            if (not os.path.exists(subdir)):
                os.mkdir(subdir)

                     netrc = parser(self.xdg() + "/netrc").hosts
            except:
                pass
        for server in varhosts:
            if server in netrc:
                return netrc[server]


    # Use config:-style definitions for argv extraction,
    # such as: { arg: -D, name: debug, type: bool }
    def init_args(self, ap):
        for opt in plugin_meta(frame=0).get("config"):
            if [kwargs for kwargs in [self.argparse_map(opt)]]:
                #print kwargs



                ap.add_argument(*kwargs.pop("args"), **kwargs)
        return ap.parse_args()


    # Copy args fields into conf. dict
    def apply_args(self, args):
        self.debug = args.debug
        if args.exit:
            sys.exit(1)
        for p_id in (args.disable or []):
            self.plugins[p_id] = 0
        for p_id in (args.enable or []):
            self.plugins[p_id] = 1


    # Transform config: description into quirky ArgumentParser args.
    #
    # · An option entry requires an arg: parameter - unlike regular plugin options:
    #     { arg: -i, name: input[], type: str, description: input files }
    # · Where list elements are indicated by appending `[]` to names, or `*`onto type
    #   specifiers (alternatively `?`, `+` or a numeric count).
    # · Types `str` or `int` and `bool` are recognized (bool with false/true optionals).
    # · Entries can also carry a `hidden: 1` or `required: 1` attribute.
    # · And `help:` is an alias to `description:`
    # · Same for `default:` instead of the normal `value:`
    # · And `type: select` utilizes the `select: a|b|c` format as uaual.
    # · ArgParsers const=, metavar= flag, or type=file are not aliased here.
    #
    def argparse_map(self, opt):
        if not ("arg" in opt and opt["name"] and opt["type"]):
            return {}

        # Extract --flag names
        args = opt["arg"].split() + re.findall("-+\w+", opt["name"])

        # Prepare mapping options
        typing = re.findall("bool|str|\[\]|const|false|true", opt["type"])
        naming = re.findall("\[\]", opt["name"])
        name   = re.findall("(?<!-)\\b\\w+", opt["name"])
        nargs  = re.findall("\\b\d+\\b|[\?\*\+]", opt["type"]) or [None]
        is_arr = "[]" in (naming + typing) and nargs == [None]
        is_bool= "bool" in typing
        false_b = "false" in typing or opt["value"] in ("0", "false")
        #print "\nname=", name, "is_arr=", is_arr, "is_bool=", is_bool, "bool_d=", false_b, "naming=", naming, "typing=", typing

        # Populate partially - ArgumentParser has aversions to many parameter combinations
        kwargs = {
            "args": args,
            "dest": name[0] if not name[0] in args else None,
            "action": self.sw( {is_arr: "append"}, {is_bool and false_b: "store_false"}, {is_bool: "store_true"}, {1: "store"} ),
            "nargs": nargs[0],
            "default": opt.get("default") or opt["value"],
            "type":  self.sw( {is_bool: None}, {"int" in typing: int}, {"bool" in typing: bool}, {1: str} ),
            "choices": opt["select"].split("|") if "select" in opt else None,
            "required": "required" in opt or None,
            "help": opt["description"] if not "hidden" in opt else argparse.SUPPRESS,
        }
        return {k:w for k,w in kwargs.items() if w is not None}


    # Shorthand switch, returns first value for cond==true from list of {cond:val} arguments
    def sw(self, *args):
        for pair in args:
            [(cond,val)] = pair.items()
            if cond:
                return val


# Retrieve content from install path or pyzip archive (alias for pkgutil.get_data)
#
def get_data(fn, decode=False, gz=False, file_base="config"):
    try:
        bin = pkgutil.get_data(file_base, fn)

# wrapper for all print statements
def __print__(*args):
    if "debug" in conf and conf.debug or args[0] == dbg.ERR:
        print(" ".join([str(a) for a in args]), file=sys.stderr)


# error colorization
dbg = type('obj', (object,), {
    "ERR":  r"[ERR]",  # red    ERROR
    "INIT": r"[INIT]", # red    INIT ERROR
    "PROC": r"[PROC]", # green  PROCESS