from invoice import Invoice, Tax
import db

import argparse
import tempfile
import subprocess
import sqlite3
from configparser import ConfigParser
import os
from os import path


def load_config():
    basedir = os.environ.get('XDG_CONFIG_HOME', None) or \
              path.join(os.environ["HOME"], ".config")

    basedir = path.join(basedir, "fracture")
    confile = path.join(basedir, "config")

    conf = ConfigParser()
    conf.read(confile)

    # SERIES
    for k in conf["series"]:
        Invoice.SERIES[int(k)] = conf["series"][k]

    if Invoice.SERIES == {}:
        raise "Invoice series not configured correctly: no series found"

    # ID FORMAT
    FORMAT = conf["invoice"].get("id_format",
             '"%s/%s/%s" % (series, date.year, id)')

    def f(series, date, id):
        return eval(FORMAT, None, {"series": series, "date": date, "id": id})

    Invoice.ID_FORMAT =  f

    # CURRENCY
    Invoice.CURRENCY  = conf["invoice"].get("currency", "€")
    Invoice.CURRENCY_DECIMAL = conf["invoice"].getint("currency_decimal", 2)

    # INVOICE LEVEL TAXES (like IRPF in Spain)
    tax = []
    for k in conf["taxes"]:
        tax.append(Tax(k, conf.getfloat("taxes",k)))
    Invoice.DEFAULT_TAXES = tuple(tax)

    # DATABASE
    Invoice.DB_FILE = path.join(basedir, "invoice.db")
    if not os.path.exists(Invoice.DB_FILE):
        db.create(Invoice.DB_FILE)

def call_editor(filename):
    """ Edit filename with $EDITOR (fallback to Vim) """
    if not os.path.exists(filename):
        raise FileNotFoundError("File not found: " + filename)
    process = subprocess.Popen([os.environ.get("EDITOR", "vim"), filename],)
    process.wait()

def edit(contents):
    """ Edit temporary file with initial `contents` and return it's edited
    content """

    with tempfile.NamedTemporaryFile(mode="w", delete=False) as t:
        t.write(contents)

    call_editor(t.name)

    with open(t.name) as t:
        edited_content = t.read()

    if os.path.exists(t.name):
        os.remove(t.name)

    return edited_content


if __name__ == "__main__":
    load_config()


    # TODO
    a = Invoice()
    a.from_config( edit( a.to_config() ))
    num = a.persist()
    print(num)
    edit(Invoice.load(num).to_config())