# -*- coding: utf-8 -*-
import sys
import os
import math
import socket # Usiamo i socket per evitare l'errore "lp not found"
import time
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
CUPS_IP = "192.168.1.14"
CUPS_PORT = 631 # Porta standard IPP/CUPS

@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
                if u == "mm": return val / 1000
                if u == "cm": return val / 100
                return val

            vol = to_m(d.get('a','0'), d.get('ua','m')) * to_m(d.get('l','0'), d.get('ul','m')) * to_m(d.get('p','0'), d.get('up','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}
            c = {m: float(d.get(f'c_{m}', '0').replace(',','.')) for m in mats}
            
            somma_p = sum(p.values())
            res = {"vol": f"{vol:.3f}", "peso": f"{peso_tot:.0f}"}
            
            tot_s, costo_t = 0, 0
            for m in mats:
                # Correzione bug per valori a zero
                if p[m] <= 0:
                    res[f's_{m}'] = 0
                    res[f'cost_{m}'] = "0.00"
                    continue
                kg = (p[m]/somma_p)*peso_tot if somma_p > 0 else 0
                s_esatti = kg/w[m] if w[m] > 0 else 0
                res[f's_{m}'] = math.ceil(s_esatti)
                res[f'cost_{m}'] = f"{math.ceil(s_esatti)*c[m]:.2f}"
                tot_s += math.ceil(s_esatti)
                costo_t += math.ceil(s_esatti)*c[m]
                
            res.update({"tot_sacc": tot_s, "costo_tot": f"{costo_t:.2f}", "acqua": f"{vol * 150:.0f}"})
            
            v_b = float(d.get('v_bet', '160').replace(',','.'))
            n_c = max(1, math.ceil((vol*1000)/v_b)) if vol > 0 else 1
            res["n_c"] = n_c
            for m in mats:
                if p[m] <= 0: res[f'bc_{m}'] = "0.00"
                else: res[f'bc_{m}'] = f"{((p[m]/somma_p)*peso_tot/w[m])/n_c:.2f}"
            res["bc_aq"] = f"{(vol*150)/n_c:.2f}"
        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
    testo = f"REPORT CALCOLO\nVolume: {f.get('res_vol')} m3\nSacchetti: {f.get('res_tot_s')}\nCosto: {f.get('res_costo_t')} EUR"
    try:
        # Invio diretto al socket del container per evitare l'errore 'lp'
        with socket.create_connection((CUPS_IP, CUPS_PORT), timeout=5) as s:
            s.sendall(testo.encode('utf-8'))
        return "OK - Inviato a Virtual_PDF"
    except Exception as e:
        return f"Errore di rete CUPS: {str(e)}"

@app.route('/download', methods=['POST'])
def download():
    f = request.form
    report = f"REPORT TECNICO\nVolume: {f.get('res_vol')} m3\nTotale: {f.get('res_tot_s')} sacchetti"
    return Response(report, mimetype="text/plain", headers={"Content-disposition":"attachment;filename=Report.txt"})

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