""" A collection of utilities for feedback app.

"""

from offline.feedback.models import *

LONG_FIELD_NAME = {'topics': "Range of topics covered:",

                   'depth': "Depth of coverage:",

                   'methodology': "Effectiveness of methodology:",

                   'pace': "Pace of coverage:",

                   'applicability': "Applicability:",

                   'problems': "Choice of problems:",

                   'exercises': "Choice of Exercises:",

                  }

EXPAND_OPTION = {

    "topics" : {

        "1" : "%d out of %s people felt that the range of topics covered was very relevant",

        "2" : "%d out of %s people felt that the range of topics covered was relevant",

        "3" : "%d out of %s people felt that the range of topics covered was somewhat relevant",

        "4" : "%d out of %s people felt that the range of topics covered was not relevant",

    },

    "depth" : {

        "1" : "%d out of %s people felt that the depth of coverage was too detailed",

        "2" : "%d out of %s people felt that the depth of coverage was detailed",

        "3" : "%d out of %s people felt that the depth of coverage was not detailed enough",

        "4" : "%d out of %s people felt that the depth of coverage was poorly detailed",

    },

    "methodology" : {

        "1" : "%d out of %s people felt that the teaching methodology was extremely effective",

        "2" : "%d out of %s people felt that the teaching methodology was effective",

        "3" : "%d out of %s people felt that the teaching methodology was not very effective",

        "4" : "%d out of %s people felt that the teaching methodology was ineffective",

    },

    "pace" : {

        "1" : "%d out of %s people felt that the the pace of coverage was too fast",

        "2" : "%d out of %s people felt that the the pace of coverage was fast",

        "3" : "%d out of %s people felt that the the pace of coverage was just right",

        "4" : "%d out of %s people felt that the the pace of coverage was slow",

        "5" : "%d out of %s people felt that the the pace of coverage was too slow",

    },

    "applicability" : {

        "1" : "%d out of %s people felt that they can apply what they have learnt immediately",

        "2" : "%d out of %s people felt that they can apply what they have learnt somewhat immediately",

        "3" : "%d out of %s people felt that they cannot apply what they have learnt immediately",

        "4" : "%d out of %s people felt that they might never apply what they have learnt",

    },

    "problems" : {

        "1" : "%d out of %s people felt that the problems were very interesting",

        "2" : "%d out of %s people felt that the problems were interesting",

        "3" : "%d out of %s people felt that the problems were somewhat interesting",

        "4" : "%d out of %s people felt that the problems were not interesting",

    },

    "exercises" : {

        "1" : "%d out of %s people felt that the exercises were very instructive",

        "2" : "%d out of %s people felt that the exercises were instructive",

        "3" : "%d out of %s people felt that the exercises were somewhat instructive",

        "4" : "%d out of %s people felt that the exercises were not instructive",

    },

}

def make_day_report(feeds):

    """ take a list of feedback objects and return the percentage of each item in the form of a dict.

    """

    no_of_feeds = feeds.count()

    if not no_of_feeds:

        return []

    day_report = []

    for field in ['topics', 'depth', 'methodology', 'pace', 'applicability', 'problems', 'exercises']:

        choices = eval((field+'_choices').upper()) ## the choices are named accordingly in the models file

        choices_dict = dict(choices)

        field_report = []

        for option in sorted(choices_dict.keys()):

            args_dict = {field : option}

            option_percent = feeds.filter(**args_dict).count() * 100.0 / no_of_feeds

            option_feeds = feeds.filter(**args_dict).count()

            if option_feeds:

                field_report.append((EXPAND_OPTION[field][option])%(option_feeds,no_of_feeds))

        if field_report:

            day_report.extend( [LONG_FIELD_NAME[field], field_report] )

    return day_report