from django.shortcuts import render, redirect
from django.contrib.auth.decorators import login_required
from django.db.models import Value
from apps.transactions.forms import TransactionForm
from apps.transactions.forms import ImportForm
from apps.transactions.models import Transaction
from apps.transactions.importbtcde import ImportBtcDe
import datetime
import socket
import xlwt
from django.http import HttpResponse


@login_required
def add(request):
    if request.method == "POST":
        # request.POST is immutable, so make a copy
        values = request.POST.copy()
        values['owner'] = request.user.id
        form = TransactionForm(values)
        if form.is_valid():
            try:
                form.save()
                return redirect('/transactions/show')
            except:
                pass
    else:
        form = TransactionForm()
    return render(request,'add.html',{'form':form})

@login_required
def importbtcde(request):
    form = ImportForm()
    if request.method == "POST":
         form = ImportForm(request.POST)
         if form.is_valid():
#        try:
            importBtcDe = ImportBtcDe()
#           importBtcDe.Import(request.POST['api_key'], request.POST['api_secret'], request.POST['start_date'], request.user.id)
            importBtcDe.Import(form.cleaned_data.get('api_key'), form.cleaned_data.get('api_secret'), form.cleaned_data.get('start_date'), request.user)
            return redirect('/transactions/show')
#        except:
#            pass
    hostname = socket.gethostname()
    my_ip = socket.gethostbyname(hostname)
    return render(request,'import.html',{'form':form, 'my_ip': my_ip})

@login_required
def show(request):
    if 'crypto' in request.GET:
        crypto = request.GET['crypto']
    else:
        crypto = None

    if crypto:
        transactions = Transaction.objects.filter(owner=request.user, crypto_currency=crypto).order_by('-date_valid').annotate(crypto_total=Value(0.0), fiat_total=Value(0.0))
    else:
        transactions = Transaction.objects.filter(owner=request.user).order_by('-date_valid').annotate(crypto_total=Value(0.0), fiat_total=Value(0.0))
    for tr in transactions:
        tr.crypto_total = 0.0
        if tr.crypto_amount:
            tr.crypto_total += float(tr.crypto_amount)
        if tr.crypto_fee:
            tr.crypto_total += float(tr.crypto_fee)
        tr.fiat_total = 0.0
        if tr.fiat_amount:
            tr.fiat_total += float(tr.fiat_amount)
        if tr.fiat_fee:
            tr.fiat_total += float(tr.fiat_fee)
    return render(request,"show.html",{'transactions':transactions,
        'tax_limit_day': datetime.datetime.now() - datetime.timedelta(days=1*365),
        'crypto': crypto})


@login_required
def export(request):
    if 'crypto' in request.GET:
        crypto = request.GET['crypto']
    else:
        crypto = None

    if crypto:
        filename="transactions-"+crypto+".xls"
        transactions = Transaction.objects.filter(owner=request.user, crypto_currency=crypto).order_by('-date_valid')
    else:
        transactions = Transaction.objects.filter(owner=request.user).order_by('-date_valid')
        filename="transactions.xls"

    response = HttpResponse(content_type='application/ms-excel')
    response['Content-Disposition'] = 'attachment; filename="'+filename+'"'

    wb = xlwt.Workbook(encoding='utf-8')
    ws = wb.add_sheet('Transactions')

    # header
    row_num = 0
    font_style = xlwt.XFStyle()
    font_style.font.bold = True

    columns = ['Date', 'Type', 'Crypto Amount', 'Crypto Fee', 'Crypto Currency', 'Fiat Amount', 'Fiat Fee', 'Fiat Currency', 'Rate', 'Description', ]
    for col_num in range(len(columns)):
        ws.write(row_num, col_num, columns[col_num], font_style)

    # body
    font_style = xlwt.XFStyle()
    date_format = xlwt.XFStyle()
    date_format.num_format_str = 'dd/mm/yyyy'

    for row in transactions:
        row_num += 1
        ws.write(row_num, 0, row.date_valid.replace(tzinfo=None), date_format)
        ws.write(row_num, 1, row.transaction_type, font_style)
        if row.transaction_type == 'B':
            ws.write(row_num, 2, row.crypto_amount, font_style)
        elif row.crypto_amount:
            ws.write(row_num, 2, -1*row.crypto_amount, font_style)
        if row.crypto_fee:
            ws.write(row_num, 3, -1*row.crypto_fee, font_style)
        ws.write(row_num, 4, row.crypto_currency, font_style)
        if row.transaction_type == 'B' and row.fiat_amount:
            ws.write(row_num, 5, -1*row.fiat_amount, font_style)
        else:
            ws.write(row_num, 5, row.fiat_amount, font_style)
        if row.fiat_fee:
            ws.write(row_num, 6, -1*row.fiat_fee, font_style)
        ws.write(row_num, 7, row.fiat_currency, font_style)
        ws.write(row_num, 8, row.exchange_rate, font_style)
        ws.write(row_num, 9, row.description, font_style)

    wb.save(response)
    return response


@login_required
def edit(request, id):
    transaction = Transaction.objects.get(id=id, owner=request.user)
    form = TransactionForm(request.POST or None, instance = transaction)
    return render(request,'edit.html', {'transaction':transaction, 'form': form})

@login_required
def update(request, id):
    transaction = Transaction.objects.get(id=id, owner=request.user)
    # request.POST is immutable, so make a copy
    values = request.POST.copy()
    values['owner'] = request.user.id
    form = TransactionForm(values, instance = transaction)
    if form.is_valid():
        form.save()
        return redirect("/transactions/show")
    return render(request, 'edit.html', {'transaction': transaction, 'form': form})

@login_required
def destroy(request, id):
    transaction = Transaction.objects.get(id=id, owner=request.user.id)
    transaction.delete()
    return redirect("/transactions/show")