import tkinter as tk
from tkinter import messagebox
from database import connect

import qrcode
from PIL import ImageTk


class KasirPage:
    def __init__(self, parent, controller=None):
        self.parent = parent
        self.frame = tk.Frame(parent)
        self.frame.pack(fill="both", expand=True)

        # =====================
        # JUDUL
        # =====================
        tk.Label(
            self.frame,
            text="KASIR - PEMBAYARAN",
            font=("Arial", 18, "bold")
        ).pack(pady=10)

        tk.Button(
            self.frame,
            text="Logout",
            bg="#f9e79f",
            command=self.logout
        ).pack(pady=5)

        tk.Button(
            self.frame,
            text="Refresh",
            command=self.load_tagihan
        ).pack(pady=3)

        # =====================
        # LIST TAGIHAN
        # =====================
        tk.Label(
            self.frame,
            text="Daftar Tagihan (Status: Disajikan)",
            font=("Arial", 12)
        ).pack(pady=5)

        self.listbox = tk.Listbox(self.frame, width=65, height=10)
        self.listbox.pack(pady=5)

        # =====================
        # METODE PEMBAYARAN
        # =====================
        metode_frame = tk.Frame(self.frame)
        metode_frame.pack(pady=5)

        tk.Label(metode_frame, text="Metode Pembayaran:").pack(side=tk.LEFT)

        self.metode = tk.StringVar(value="Cash")
        tk.OptionMenu(
            metode_frame,
            self.metode,
            "Cash", "QRIS", "E-Wallet"
        ).pack(side=tk.LEFT, padx=5)

        # =====================
        # BUTTON BAYAR
        # =====================
        tk.Button(
            self.frame,
            text="Proses Pembayaran",
            bg="#d1e7dd",
            width=25,
            command=self.bayar
        ).pack(pady=10)

        self.transaksi_data = []
        self.load_tagihan()

    # =====================
    # LOAD TAGIHAN
    # =====================
    def load_tagihan(self):
        self.listbox.delete(0, tk.END)
        self.transaksi_data = []

        db = connect()
        cur = db.cursor()
        cur.execute("""
            SELECT id, meja_id, total
            FROM transaksi
            WHERE status='Disajikan'
        """)
        rows = cur.fetchall()
        db.close()

        for row in rows:
            t_id, meja, total = row
            self.listbox.insert(
                tk.END,
                f"Meja {meja} | ID {t_id} | Total Rp {total:,.0f}"
            )
            self.transaksi_data.append(row)

    # =====================
    # BAYAR
    # =====================
    def bayar(self):
        idx = self.listbox.curselection()
        if not idx:
            messagebox.showwarning("Pilih", "Pilih tagihan yang akan dibayar!")
            return

        t_id, meja, total = self.transaksi_data[idx[0]]
        metode = self.metode.get()

        if metode == "QRIS":
            self.tampilkan_qr(t_id, meja, total)
        else:
            self.selesaikan_pembayaran(t_id, meja, total, metode)

    # =====================
    # QRIS
    # =====================
    def tampilkan_qr(self, t_id, meja, total):
        win = tk.Toplevel(self.frame)
        win.title("QRIS Payment")
        win.geometry("320x420")

        tk.Label(
            win,
            text="SCAN QR UNTUK BAYAR",
            font=("Arial", 12, "bold")
        ).pack(pady=10)

        qr_data = f"""
QRIS-DUMMY
Cafe Python
Transaksi: {t_id}
Meja: {meja}
Total: {total}
"""

        qr = qrcode.make(qr_data)
        qr_img = ImageTk.PhotoImage(qr)

        lbl = tk.Label(win, image=qr_img)
        lbl.image = qr_img
        lbl.pack(pady=10)

        tk.Label(
            win,
            text=f"Total: Rp {total:,.0f}",
            font=("Arial", 11)
        ).pack(pady=5)

        tk.Button(
            win,
            text="Konfirmasi Pembayaran",
            bg="#d1e7dd",
            width=25,
            command=lambda: [
                self.selesaikan_pembayaran(t_id, meja, total, "QRIS"),
                win.destroy()
            ]
        ).pack(pady=15)

    # =====================
    # FINAL PEMBAYARAN
    # =====================
    def selesaikan_pembayaran(self, t_id, meja, total, metode):
        db = connect()
        cur = db.cursor()
        cur.execute(
            "UPDATE transaksi SET status='Lunas' WHERE id=?",
            (t_id,)
        )
        db.commit()
        db.close()

        messagebox.showinfo(
            "Struk Pembayaran",
            f"""
======= STRUK =======
ID Transaksi : {t_id}
Meja         : {meja}
Total        : Rp {total:,.0f}
Metode       : {metode}
Status       : Lunas
====================
Terima kasih 🙏
"""
        )

        self.load_tagihan()

    # =====================
    # LOGOUT
    # =====================
    def logout(self):
        self.frame.destroy()
        from main import LoginScreen
        LoginScreen(self.parent)