#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
import urllib.parse
import qrcode
from pathlib import Path
from datetime import datetime
from PIL import Image, ImageTk
import customtkinter as ctk
from tkinter import messagebox


# ================================
# ⚙️ Default Configuration
# ================================
IBAN = "CZ7520100000002800046620"
CURRENCY = "CZK"
OUTPUT_DIR = Path("QRPlatby")
OUTPUT_DIR.mkdir(exist_ok=True)

# Default values (can be overridden by arguments)
PRIJMENI = "Buzalka"
JMENO = "Vladimír"
RODCIS = "730928104"

# ================================
# 💬 Argument Handling
# ================================
if len(sys.argv) >= 4:
    JMENO = sys.argv[1]
    PRIJMENI = sys.argv[2]
    RODCIS = sys.argv[3]
elif len(sys.argv) == 2 and sys.argv[1] in ("-h", "--help"):
    print("Usage: QRPlatbaApp.py JMENO PRIJMENI RODCIS")
    sys.exit(0)

# ================================
# 💉 Items to Pay
# ================================
ITEMS = {
    "Očkování chřipka Vaxigrip": 600.00,
    "Očkování chřipka Efluelda": 1300.00,
}

# ================================
# 🧩 Helper
# ================================
def create_spayd(iban, amount, vs, msg, currency="CZK"):
    msg_encoded = urllib.parse.quote(msg, safe="$%*+-.:/")
    return f"SPD*1.0*ACC:{iban}*AM:{amount:.2f}*CC:{currency}*X-VS:{vs}*MSG:{msg_encoded}"


# ================================
# 🪟 GUI Class
# ================================
class QRPlatbaApp(ctk.CTk):
    def __init__(self):
        super().__init__()
        self.title("QR Platba – Ordinace MUDr. Buzalková")
        self.geometry("520x520")
        self.minsize(480, 480)
        self.resizable(True, True)

        ctk.set_appearance_mode("light")
        ctk.set_default_color_theme("blue")

        frame = ctk.CTkFrame(self, corner_radius=10)
        frame.pack(expand=True, fill="both", padx=20, pady=20)

        ctk.CTkLabel(frame, text="Generátor QR Platby",
                     font=("Arial", 20, "bold")).pack(pady=(10, 20))

        # 👤 Patient Info
        patient = ctk.CTkFrame(frame, corner_radius=8)
        patient.pack(fill="x", pady=(0, 20), padx=10)
        for text in [f"Příjmení: {PRIJMENI}",
                     f"Jméno: {JMENO}",
                     f"Rodné číslo: {RODCIS}"]:
            ctk.CTkLabel(patient, text=text, font=("Arial", 12)).pack(anchor="w", padx=10, pady=2)

        # 💰 Payment Section
        pay = ctk.CTkFrame(frame, corner_radius=8)
        pay.pack(fill="x", pady=(0, 20), padx=10)
        ctk.CTkLabel(pay, text="Vyberte položku k úhradě:",
                     font=("Arial", 12, "bold")).pack(anchor="w", padx=10, pady=(10, 5))

        self.display_items = [f"{name} ({price:.0f} Kč)" for name, price in ITEMS.items()]
        self.item_map = {f"{name} ({price:.0f} Kč)": name for name, price in ITEMS.items()}

        self.selected_item = ctk.StringVar(value=self.display_items[0])
        self.combo = ctk.CTkOptionMenu(
            pay,
            variable=self.selected_item,
            values=self.display_items,
            font=("Arial", 12),
            command=self.update_amount
        )
        self.combo.pack(fill="x", padx=10)

        self.amount_label = ctk.CTkLabel(pay, text="", font=("Arial", 12, "italic"))
        self.amount_label.pack(anchor="e", padx=10, pady=(5, 10))
        self.update_amount()

        ctk.CTkButton(frame, text="Vytvořit QR Platbu",
                      font=("Arial", 13, "bold"),
                      height=40,
                      command=self.generate_qr).pack(pady=10)

        self.qr_label = ctk.CTkLabel(frame, text="")
        self.qr_label.pack(pady=15)

        ctk.CTkLabel(frame,
                     text="© Ordinace MUDr. Buzalková | QR Platba dle ČBA v1.2",
                     font=("Arial", 10),
                     text_color="#666").pack(side="bottom", pady=(10, 0))

        self.center_window()

    # ================================
    # 🪟 Center Window
    # ================================
    def center_window(self):
        self.update_idletasks()
        width = self.winfo_width()
        height = self.winfo_height()
        screen_width = self.winfo_screenwidth()
        screen_height = self.winfo_screenheight()
        x = int((screen_width / 2) - (width / 2))
        y = int((screen_height / 2) - (height / 2))
        self.geometry(f"{width}x{height}+{x}+{y}")

    # ================================
    # 💸 Update and Generate
    # ================================
    def update_amount(self, _=None):
        display_item = self.selected_item.get()
        item = self.item_map[display_item]
        self.amount_label.configure(text=f"Částka: {ITEMS[item]:.2f} Kč")

    def generate_qr(self):
        display_item = self.selected_item.get()
        item = self.item_map[display_item]
        spayd = create_spayd(IBAN, ITEMS[item], RODCIS, f"{PRIJMENI} {JMENO} – {item}", CURRENCY)
        img = qrcode.make(spayd)
        filename = f"{PRIJMENI}_{JMENO}_{datetime.now():%Y%m%d_%H%M%S}.png"
        out_path = OUTPUT_DIR / filename
        img.save(out_path)

        img_resized = img.resize((300, 300))
        qr_tk = ImageTk.PhotoImage(img_resized)
        self.qr_label.configure(image=qr_tk)
        self.qr_label.image = qr_tk

        self.update_idletasks()
        self.geometry(f"{self.winfo_reqwidth()}x{self.winfo_reqheight()}")
        self.center_window()


# ================================
# 🚀 Main
# ================================
if __name__ == "__main__":
    app = QRPlatbaApp()
    app.mainloop()