From e74fb23d68d94150d8ee18c8e553307cb07ec6b6 Mon Sep 17 00:00:00 2001
From: Ekaitz Zarraga <ekaitz@elenq.tech>
Date: Thu, 6 Aug 2020 12:43:58 +0200
Subject: Return the summary with the different VAT+Taxes in order

---
 fracture/__main__.py | 34 ++++++++++++++++++++++----
 fracture/invoice.py  | 67 ++++++++++++++++++++++++++++++++++++----------------
 2 files changed, 76 insertions(+), 25 deletions(-)

diff --git a/fracture/__main__.py b/fracture/__main__.py
index d0305ab..c51c556 100644
--- a/fracture/__main__.py
+++ b/fracture/__main__.py
@@ -1,6 +1,7 @@
-from invoice import Invoice, Tax
+from invoice import Invoice, Tax, Product
 import db
 
+from csv import DictWriter
 import datetime
 from functools import wraps
 from argparse import ArgumentParser as ap
@@ -27,6 +28,10 @@ def load_config():
     conf = ConfigParser()
     conf.read(confile)
 
+    # VAT-types
+    for k in conf["vat"]:
+        Product.VATS += (float(conf["vat"][k]),)
+
     # SERIES
     for k in conf["series"]:
         Invoice.SERIES[int(k)] = conf["series"][k]
@@ -55,10 +60,10 @@ def load_config():
         templatefile = path.join(confile, templatefile)
 
     # INVOICE LEVEL TAXES (like IRPF in Spain)
-    tax = []
+    tax = ()
     for k in conf["taxes"]:
-        tax.append(Tax(k, conf.getfloat("taxes",k)))
-    Invoice.DEFAULT_TAXES = tuple(tax)
+        tax += (Tax(k, conf.getfloat("taxes",k)),)
+    Invoice.DEFAULT_TAXES = tax
 
     # DATABASE
     Invoice.DB_FILE = path.join(basedir, "invoice.db")
@@ -112,7 +117,26 @@ def new_invoice():
 @command
 def summarize(xlsx=False, year=None, quarter=None):
     invoices = Invoice.load_by_date(year, quarter)
-    rows     = map(lambda x: x.to_row(), invoices)
+    rows     = sorted((map(lambda x: x.to_row(), invoices)),
+                 key=lambda x: x["type"])
+
+    keys = list(rows[0].keys())
+    for r in rows:
+        for k in r.keys():
+            if k not in keys:
+                # TODO:
+                # Inserts all the taxes at the end, but this is not cool
+                # because it needs information about how is the invoice
+                # arranged
+                # Maybe move this to a static function in invoices and call it
+                # summary and make it work with some logic like: create the
+                # keys first and then go setting them in order
+                keys.insert(-1, k)
+    import sys
+    wrtr = DictWriter(sys.stdout, keys)
+    wrtr.writeheader()
+    for r in rows:
+        wrtr.writerow(r)
 
 
 if __name__ == "__main__":
diff --git a/fracture/invoice.py b/fracture/invoice.py
index 84c0f9b..b3fa6b6 100644
--- a/fracture/invoice.py
+++ b/fracture/invoice.py
@@ -1,6 +1,7 @@
 import sqlite3
 from datetime import date, datetime, timedelta
 from configparser import ConfigParser
+from collections import OrderedDict
 import io
 
 class Tax:
@@ -9,6 +10,7 @@ class Tax:
         self.ratio = ratio
 
 class Product:
+    VATS = ()
     def __init__(self, description, units=1.0,
             price_unit=0.0, vat = 0.21):
         if len(description) == 0:
@@ -16,7 +18,15 @@ class Product:
         self.description = description
         self.units       = units
         self.price_unit  = price_unit
-        self.vat         = vat
+        if vat in self.VATS:
+            self.vat     = vat
+        else:
+            raise ValueError("Product: No valid VAT. Valid are:"+\
+                    str(Product.VATS))
+    def calc_base(self):
+        return self.price_unit * self.units
+    def calc_charged_vat(self):
+        return self.calc_base() * self.vat
 
 class Customer:
     def __init__(self, name, id = "", address = ""):
@@ -323,26 +333,43 @@ class Invoice:
         pass
 
     def to_row(self):
-        psum = ((i.price_unit*i.units,
-                 i.price_unit*i.units*i.vat) for  i in self.products)
-        base = 0
-        vat  = 0
-        for i in psum:
-            base += i[0]
-            vat  += i[1]
-
-        row =  {
-            "type":          self.type,
-            "series":        self.series,
-            "id":            self.format_id(),
-            "date":          self.date.strftime("%Y-%m-%d"),
-            "customer_id":   self.customer.id,
-            "customer_name": self.customer.name,
-            "base":          round(base, self.CURRENCY_DECIMAL),
-            "vat":           round(vat,  self.CURRENCY_DECIMAL)
-        }
 
+        row =  OrderedDict(
+            type =          self.type,
+            id =            self.format_id(),
+            date =          self.date.strftime("%Y-%m-%d"),
+            customer_id =   self.customer.id,
+            customer_name = self.customer.name,
+            )
+
+        total_base = 0
+        total_charged = 0
+
+        vats = sorted(Product.VATS)
+        to_base_key = lambda v: "base("+str(v*100)+"%)"
+        to_vat_key  = lambda v: "VAT("+str(v*100)+"%)"
+        for vat in vats:
+            ps = filter(lambda p: p.vat == vat, self.products)
+
+            vat_base = 0
+            charged_vat = 0
+            for product in ps:
+                vat_base  += product.calc_base()
+                charged_vat += product.calc_charged_vat()
+            row[to_base_key(vat)] = round(vat_base,  self.CURRENCY_DECIMAL)
+            row[to_vat_key(vat)]  = round(charged_vat, self.CURRENCY_DECIMAL)
+
+            total_base    += vat_base
+            total_charged += vat_base + charged_vat
+
+        row["base(TOTAL)"] = round(total_base, self.CURRENCY_DECIMAL)
+
+        to_tax_key = lambda tax: tax.name + "("+ str(tax.ratio*100) +"%)"
         for i in self.taxes:
-            row["tax-" + i.name] = round(i.ratio * base, self.CURRENCY_DECIMAL)
+            tax_amount = i.ratio * total_base
+            row[to_tax_key(i)] = round(tax_amount, self.CURRENCY_DECIMAL)
+            total_charged += tax_amount
+
+        row["TOTAL"] = round(total_charged, self.CURRENCY_DECIMAL)
 
         return row
-- 
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