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

# 1. PERCORSO LIBRERIE SYNOLOGY (Identificato con il test)
sys.path.append('/var/services/homes/Francesco/.local/lib/python3.8/site-packages')

app = Flask(__name__)

# 2. CONFIGURAZIONE VERSIONE E STAMPA
VERSIONE = "V1.1 - Synology CUPS Edition"
CUPS_SERVER = "192.168.1.14:6310" # Indirizzo container CUPS
PRINTER_NAME = "Virtual_PDF"      # Nome stampante configurata
OUTPUT_DIR = "/volume1/docker/cups-pdf/output" # Cartella destinazione PDF

def calcola(d):
    try:
        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

        # Calcolo Volume e Peso
        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: Se la parte è 0, forza a 0 sacchetti
            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}"})
        
        # Calcolo carichi betoniera
        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:
                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
    if request.method == 'POST': res = calcola(request.form)
    return render_template('index.html', res=res, form=request.form, rev=VERSIONE)

@app.route('/stampa_pdf', methods=['POST'])
def stampa_pdf():
    f = request.form
    # Creazione testo per il PDF
    report_text = f"--- REPORT CALCOLO CEMENTO {VERSIONE} ---\n\n"
    report_text += f"Volume: {f.get('res_vol')} m3 | Peso: {f.get('res_peso')} kg\n"
    report_text += f"Sacchetti totali: {f.get('res_tot_s')} | Costo: {f.get('res_costo_t')} EUR\n\n"
    report_text += f"DOSAGGIO PER {f.get('res_nc')} CARICHI:\n"
    report_text += f"- Cemento: {f.get('res_bc_cem')} sacch.\n- Sabbia: {f.get('res_bc_sab')} sacch.\n"
    report_text += f"- Ghiaia: {f.get('res_bc_ghi')} sacch.\n- Acqua: {f.get('res_bc_aq')} L"
    
    temp_file = "/tmp/stampa_cemento.txt"
    try:
        with open(temp_file, "w", encoding="utf-8") as tmp:
            tmp.write(report_text)
        
        # Comando di stampa lp (standard Linux su Synology)
        subprocess.run(["lp", "-h", CUPS_SERVER, "-d", PRINTER_NAME, temp_file], check=True)
        
        time.sleep(2) # Attesa per scrittura file nel container
        return f"OK - Inviato a Virtual_PDF. Verifica in: {OUTPUT_DIR}"
    except Exception as e:
        return f"Errore: {str(e)}"
    finally:
        if os.path.exists(temp_file): os.remove(temp_file)

@app.route('/download', methods=['POST'])
def download():
    f = request.form
    report = f"REPORT TECNICO - Volume: {f.get('res_vol')} m3 - Totale: {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)