# -*- coding: UTF-8 -*


"""Outil pour migration ScoDoc 7 => ScoDoc 8

Pour chaque module dans views:
    - construire la liste des fonctions définies dans ce module:
      get_module_functions

Pour chaque module dans views et dans scodoc:
    - remplacer context.xxx par app.views.M.xxx
    où M est le module de views définissant xxx
    Si xxx n'est pas trouvé, erreur !
"""


from __future__ import print_function
import re

from pprint import pprint as pp
import sys
import types

import click
import flask

import app
from app import create_app, cli, db
from app.auth.models import User, Role, UserRole

from config import Config

from app.views import notes

TYPES_TO_SCAN = {
    types.FunctionType,
    # types.ClassType,
    # types.DictionaryType,
    # types.FloatType,
    # types.IntType,
    # types.ListType,
    # types.StringType,
    # types.TupleType,
}


def get_module_symbols(module):
    """returns list of symbols (functions and constants) defined in the given module"""
    return [
        f.__name__
        for f in [getattr(module, name) for name in dir(module)]
        if (type(f) in TYPES_TO_SCAN)
        and ((type(f) != types.FunctionType) or (f.__module__ == module.__name__))
    ]


# print("\n".join(f.__name__ for f in get_module_functions(notes)))


def scan_views_symbols():
    """Scan modules in app.views and returns
    { }
    """
    views_modules = [
        getattr(app.views, mod_name)
        for mod_name in dir(app.views)
        if type(getattr(app.views, mod_name)) == types.ModuleType
    ]
    sym2mod = {}  # symbole_name : module
    for module in views_modules:
        start = "app.views."
        assert module.__name__.startswith(start)
        module_name = module.__name__[len(start) :]
        symbols = set(get_module_symbols(module))
        print("%d symbols defined in %s" % (len(symbols), module))
        dups = symbols.intersection(sym2mod)
        if len(dups):
            print("duplicated symbols !")
            for dup in dups:
                print("%s:\t%s\t%s" % (dup, sym2mod[dup], module_name))

        sym2mod.update({s: module_name for s in symbols})
    return sym2mod


def replace_context_calls(sourcefilename, sym2mod):
    undefined_list = []  # noms de fonctions non présents dans les modules "views"

    def repl(m):
        funcname = m.group(1)
        module = sym2mod.get(funcname, False)
        if module:
            return module + "." + funcname
        else:
            undefined_list.append((sourcefilename, funcname))
            return m.group(0)  # leave unchanged

    print("reading %s" % sourcefilename)
    source = open(sourcefilename).read()
    exp = re.compile(r"context\.([a-zA-Z0-9_]+)")
    source2 = exp.sub(repl, source)
    return source2, undefined_list


sym2mod = scan_views_symbols()

source2, undefined_list = replace_context_calls("app/scodoc/sco_core.py", sym2mod)