# -*- coding: utf-8 -*-
import logging
import simplejson
import os
import io
import base64
import openerp
import time
import random
import openerp.addons.hw_proxy.controllers.main as hw_proxy
import subprocess
import usb.core
from .. import escpos
from ..escpos import printer
#import escpos 
#import escpos.printer
from PIL import Image

from openerp import http
from openerp.http import request
from openerp.addons.web.controllers.main import manifest_list, module_boot, html_template

_logger = logging.getLogger(__name__)

class EscposDriver(hw_proxy.Proxy):
    
    supported_printers = [
        { 'vendor' : 0x04b8, 'product' : 0x0e03, 'name' : 'Epson TM-T20' }
    ]
    
    @http.route('/hw_proxy/open_cashbox', type='json', auth='admin')
    def open_cashbox(self):
        print 'ESC/POS: OPEN CASHBOX'

    @http.route('/hw_proxy/print_receipt', type='json', auth='admin')
    def print_receipt(self, receipt):
        print 'ESC/POS: PRINT RECEIPT ' + str(receipt)

        printers = self.connected_usb_devices(self.supported_printers)

        def check(string):
            return string != True and bool(string) and string.strip()
        
        def price(amount):
            return "{0:.2f}".format(amount)

        def printline(left, right='', width=40, ratio=0.5, indent=0):
            lwidth = int(width * ratio) 
            rwidth = width - lwidth 
            lwidth = lwidth - indent
            
            left = left[:lwidth]
            if len(left) != lwidth:
                left = left + ' ' * (lwidth - len(left))

            right = right[-rwidth:]
            if len(right) != rwidth:
                right = ' ' * (rwidth - len(right)) + right

            return ' ' * indent + left + right + '\n'

        logo = None


        if receipt['company']['logo']:
            img = receipt['company']['logo']
            img = img[img.find(',')+1:]
            f = io.BytesIO('img')
            f.write(base64.decodestring(img))
            f.seek(0)
            logo_rgba = Image.open(f)
            logo = Image.new('RGB', logo_rgba.size, (255,255,255))
            logo.paste(logo_rgba, mask=logo_rgba.split()[3]) 
            width = 300
            wfac  = width/float(logo_rgba.size[0])
            height = int(logo_rgba.size[1]*wfac)
            logo   = logo.resize((width,height), Image.ANTIALIAS)

        if len(printers) > 0:
            printer = printers[0]

            eprint = escpos.printer.Usb(printer['vendor'], printer['product'])
            
            # Receipt Header
            if logo:
                eprint._convert_image(logo)
                eprint.text('\n')
            else:
                eprint.set(align='center',type='b',height=2,width=2)
                eprint.text(receipt['company']['name'] + '\n')

            eprint.set(align='center',type='b')
            if check(receipt['shop']['name']):
                eprint.text(receipt['shop']['name'] + '\n')
            if check(receipt['company']['contact_address']):
                eprint.text(receipt['company']['contact address'] + '\n')
            if check(receipt['company']['phone']):
                eprint.text('Tel:' + receipt['company']['phone'] + '\n')
            if check(receipt['company']['vat']):
                eprint.text('VAT:' + receipt['company']['vat'] + '\n')
            if check(receipt['company']['email']):
                eprint.text(receipt['company']['email'] + '\n')
            if check(receipt['company']['website']):
                eprint.text(receipt['company']['website'] + '\n')

            if check(receipt['cashier']):
                eprint.text('-'*32+'\n')
                eprint.text('Served by '+receipt['cashier']+'\n')

            # Orderlines
            eprint.text('\n\n')
            eprint.set(align='center')
            for line in receipt['orderlines']:
                pricestr = price(line['price_display'])
                if line['discount'] == 0 and line['unit_name'] == 'Unit(s)' and line['quantity'] == 1:
                    eprint.text(printline(line['product_name'],pricestr,ratio=0.6))
                else:
                    eprint.text(printline(line['product_name'],ratio=0.6))
                    if line['discount'] != 0:
                        eprint.text(printline('Discount: '+str(line['discount'])+'%', ratio=0.6, indent=2))
                    if line['unit_name'] == 'Unit(s)':
                        eprint.text( printline( str(line['quantity']) + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))
                    else:
                        eprint.text( printline( str(line['quantity']) + line['unit_name'] + ' x ' + price(line['price']), pricestr, ratio=0.6, indent=2))

            # Subtotal if the taxes are not included
            taxincluded = True
            if price(receipt['subtotal']) != price(receipt['total_with_tax']):
                eprint.text(printline('','-------'));
                eprint.text(printline('Subtotal',price(receipt['subtotal']),width=40, ratio=0.6))
                eprint.text(printline('Taxes',price(receipt['total_tax']),width=40, ratio=0.6))
                taxincluded = False


            # Total
            eprint.text(printline('','-------'));
            eprint.set(align='center',height=2)
            eprint.text(printline('         TOTAL',price(receipt['total_with_tax']),width=40, ratio=0.6))
            eprint.text('\n\n');
            
            # Paymentlines
            eprint.set(align='center')
            for line in receipt['paymentlines']:
                eprint.text(printline(line['journal'], price(line['amount']), ratio=0.6))

            eprint.text('\n');
            eprint.set(align='center',height=2)
            eprint.text(printline('        CHANGE',price(receipt['change']),width=40, ratio=0.6))
            eprint.set(align='center')
            eprint.text('\n');

            # Extra Payment info
            if receipt['total_discount'] != 0:
                eprint.text(printline('Discounts',price(receipt['total_discount']),width=40, ratio=0.6))
            if taxincluded:
                eprint.text(printline('Taxes',price(receipt['total_tax']),width=40, ratio=0.6))

            # Footer
            eprint.text(receipt['name']+'\n')
            eprint.text(      str(receipt['date']['date']).zfill(2)
                        +'/'+ str(receipt['date']['month']+1).zfill(2)
                        +'/'+ str(receipt['date']['year']).zfill(4)
                        +' '+ str(receipt['date']['hour']).zfill(2)
                        +':'+ str(receipt['date']['minute']).zfill(2) )
            eprint.cut()
            return