# -*- coding: utf-8 -*-
import sys
import socket
import math
from flask import Flask, render_template, request, Response

sys.path.append('/var/services/homes/Francesco/.local/lib/python3.8/site-packages')

app = Flask(__name__)

# Configurazione CUPS-PDF
CUPS_IP = "192.168.1.14"
CUPS_PORT = 6310 

@app.route('/', methods=['GET', 'POST'])
def index():
    res = None
    if request.method == 'POST':
        try:
            d = request.form
            def to_m(v, u):
                val = float(v.replace(',', '.')) if v else 0
                return val / 1000 if u == "mm" else (val / 100 if u == "cm" else val)

            vol = to_m(d.get('l','0'), d.get('ul','m')) * to_m(d.get('p','0'), d.get('up','m')) * to_m(d.get('a','0'), d.get('ua','m'))
            peso_tot = vol * 2400
            mats = ['cem', 'sab', 'ghi']
            p = {m: float(d.get(f'p_{m}', '0').replace(',','.')) for m in mats}
            w = {m: float(d.get(f'w_{m}', '25').replace(',','.')) for m in mats}
            
            somma_p = sum(p.values())
            res = {"vol": f"{vol:.3f}", "peso": f"{peso_tot:.0f}"}
            tot_s = 0
            for m in mats:
                if p[m] <= 0: # Correzione bug ghiaia a 0
                    res[f's_{m}'] = 0
                    continue
                s_calc = math.ceil(((p[m]/somma_p)*peso_tot)/w[m]) if somma_p > 0 else 0
                res[f's_{m}'] = s_calc
                tot_s += s_calc
            res["tot_sacc"] = tot_s
        except: res = None
    return render_template('index.html', res=res, form=request.form)

@app.route('/stampa_pdf', methods=['POST'])
def stampa_pdf():
    f = request.form
    # Intestazione formattata per CUPS-PDF
    report = "--- CALCOLO CEMENTO V1.1 ---\n"
    report += f"Volume: {f.get('v')} m3 | Peso: {f.get('p')} kg\n"
    report += f"Totale Sacchetti: {f.get('ts')}\n"
    
    try:
        with socket.create_connection((CUPS_IP, CUPS_PORT), timeout=5) as s:
            s.sendall(report.encode('utf-8'))
        return "OK - Report inviato a Virtual_PDF"
    except Exception as e:
        return f"Errore: {str(e)}"

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)