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

app = Flask(__name__)

def calcola(d):
    try:
        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('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:
            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:
            kg_tot = (p[m]/somma_p)*peso_tot if somma_p > 0 else 0
            res[f'bc_{m}'] = f"{(kg_tot/w[m])/n_c:.2f}"
        res["bc_aq"] = f"{(vol*150)/n_c:.2f}"
        return res
    except: return None

@app.route('/', methods=['GET', 'POST'])
def index():
    res = None
    msg_stampa = None
    if request.method == 'POST':
        res = calcola(request.form)
        if 'btn_stampa_cups' in request.form:
            msg_stampa = esegui_stampa_cups(request.form)
    return render_template('index.html', res=res, form=request.form, msg_stampa=msg_stampa)

def esegui_stampa_cups(f):
    try:
        ps_content = f"""%!PS
/Helvetica-Bold findfont 16 scalefont setfont
70 750 moveto (REPORT TECNICO CALCOLO CEMENTO) show
/Helvetica findfont 11 scalefont setfont
70 720 moveto (Volume: {f.get('res_vol')} m3 | Peso: {f.get('res_peso')} Kg) show
70 690 moveto (ACQUISTI:) show
80 675 moveto (- Cemento: {f.get('res_s_cem')} sacchetti) show
80 660 moveto (- Sabbia: {f.get('res_s_sab')} sacchetti) show
80 645 moveto (- Ghiaia: {f.get('res_s_ghi')} sacchetti) show
70 620 moveto (COSTO TOTALE: {f.get('res_costo_t')} Euro) show
70 590 moveto (DOSAGGIO CARICO ({f.get('res_nc')} carichi):) show
80 575 moveto (- Cemento: {f.get('res_bc_cem')} | Sabbia: {f.get('res_bc_sab')}) show
80 560 moveto (- Ghiaia: {f.get('res_bc_ghi')} | Acqua: {f.get('res_bc_aq')} L) show
70 500 moveto (Software Cemento Rev.1 | 20/01/2026) show
showpage"""
        comando = ["docker", "exec", "-i", "cups-pdf-server", "lp", "-d", "Virtual_PDF"]
        subprocess.run(comando, input=ps_content.encode('utf-8'), capture_output=True)
        return "OK - PDF inviato a CUPS!"
    except Exception as e:
        return f"Errore: {str(e)}"

@app.route('/download', methods=['POST'])
def download():
    f = request.form
    report = f"REPORT\nVolume: {f.get('res_vol')} m3\nCosto: {f.get('res_costo_t')} EUR"
    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)