From 9faee0c32f6cf4793effdad7425380360792bfc8 Mon Sep 17 00:00:00 2001
From: Kostanjevec <kostanjevecj@fdv.uni-lj.si>
Date: Sat, 4 Jun 2022 21:57:04 +0200
Subject: [PATCH] implementiral generate probabilistic deck

---
 deck.py | 83 ++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 68 insertions(+), 15 deletions(-)

diff --git a/deck.py b/deck.py
index 1fd426a..b4091ea 100644
--- a/deck.py
+++ b/deck.py
@@ -1,17 +1,15 @@
+from config import CONFIG
 from flask import (
     Blueprint, flash, g, redirect, render_template, request, url_for, session
 )
-
-from werkzeug.exceptions import abort
-
 from auth import login_required
 from create_db import Card, User
 
-from config import CONFIG
-
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker
 
+from numpy.random import choice
+
 bp = Blueprint('deck', __name__)
 
 engine = create_engine(CONFIG['DB_CONNECTION'])
@@ -19,17 +17,72 @@ dbsessionmaker = sessionmaker(bind=engine)
 dbsession = dbsessionmaker()
 
 @bp.route('/deck', methods=['GET'])
-# @login_required
-def get_deck(user_id):
-    user_collection = dbsession.query(Card).filter(Card.owner_id == user_id).all()
-
-    return user_collection
+def get_collection(user_id):
+    c = dbsession.query(Card).filter(Card.owner_id == user_id).all()
+    return c
 
 
-def render_card(card, user):
-    
-    return next_card()
+#2 Probabilistic
+## problem je, da pri probabilističnem težko nardiš, da pač en dan ni nič v decku, ker pač vedno izbere glede določeno število pač glede na uteži
+# 
+# to bi bilo dobro narediti direkt iz baze, ne pa da cel collection spremenimo v ta list ob card.objects TODO
+def generate_weights(user_clltn):
+    """generiramo uteži za due in new cards posebej; vrne tuple dveh listov za weightse..."""
+
+    weights_due = []
+    weights_new = []
+    for card in user_clltn:        
+        due = card.interest_rate
+
+        if due > 0:
+            weights_due.append(due)
+            weights_new.append(0)
+        else:
+            weights_due.append(0)
+            weights_new.append(1)
+        #če se odločimo, da izločimo iteme jih bo tu ignoriralo, če bo ir 0.
+
+    return weights_new, weights_due
 
 
-def next_card():
-    pass
\ No newline at end of file
+def probabilistic_deck_generator(user_id, max_new, max_due):
+        c = get_collection(user_id)
+        deck, dck_due, dck_new, due_cards = [], [], [], 0
+        w_new, w_due = generate_weights(c)
+
+        #treba je sestet non zero weights 
+        new_cards = sum(w_new)
+        for w in w_due:
+            if w > 0:
+                due_cards += 1 
+
+        #preverimo, če imamo dovolj kartic
+        if new_cards<max_new:
+            max_new = new_cards
+        if due_cards<max_due:
+            max_due = due_cards
+
+        sum_w_new = sum(w_new)
+        sum_w_due = sum(w_due)
+
+        if due_cards:
+            dck_due = list(choice(c, size=max_due, replace=False, p=list(map(lambda x: x/sum_w_due, w_due)))) #garancija, da ni ponovitev
+        if new_cards:
+            dck_new = list(choice(c, size=max_new, replace=False, p=list(map(lambda x: x/sum_w_new, w_new))))
+
+        deck = dck_due + dck_new
+
+        return deck
+
+#################################################
+#################################################
+#################################################
+##TODO
+# config za max_new in max_due
+#################################################
+#################################################
+#################################################
+#################################################
+#################################################
+#################################################
+#################################################
\ No newline at end of file