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

class WaiterDashboard:
    def __init__(self, parent):
        self.parent = parent
        self.frame = tk.Frame(parent)
        self.frame.pack(fill="both", expand=True, padx=20, pady=10)

        # =====================
        # HEADER
        # =====================
        tk.Label(
            self.frame,
            text="DASHBOARD WAITER (DAPUR)",
            font=("Arial", 18, "bold")
        ).pack(pady=10)

        top_btn = tk.Frame(self.frame)
        top_btn.pack(pady=5)

        tk.Button(top_btn, text="Refresh Data", bg="#cfe2ff",
                  width=15, command=self.load_orders).grid(row=0, column=0, padx=5)

        tk.Button(top_btn, text="Logout", bg="#f8d7da",
                  width=10, command=self.logout).grid(row=0, column=1, padx=5)

        # =====================
        # LIST PESANAN + SCROLL
        # =====================
        list_frame = tk.Frame(self.frame)
        list_frame.pack(pady=10)

        scrollbar = tk.Scrollbar(list_frame)
        scrollbar.pack(side=tk.RIGHT, fill=tk.Y)

        self.listbox = tk.Listbox(
            list_frame,
            width=90,
            height=15,
            yscrollcommand=scrollbar.set
        )
        self.listbox.pack(side=tk.LEFT)

        scrollbar.config(command=self.listbox.yview)

        # =====================
        # BUTTON VALIDASI
        # =====================
        tk.Button(
            self.frame,
            text="✔ Pesanan Selesai Disajikan",
            bg="#d1e7dd",
            font=("Arial", 11, "bold"),
            width=30,
            command=self.validasi_layanan
        ).pack(pady=10)

        self.order_ids = []
        self.load_orders()

    # =====================
    # LOAD DATA
    # =====================
    def load_orders(self):
        self.listbox.delete(0, tk.END)
        self.order_ids = []

        db = connect()
        cur = db.cursor()

        cur.execute(
            "SELECT id, meja_id, total FROM transaksi WHERE status='Pending'"
        )
        rows = cur.fetchall()

        for t_id, meja, total in rows:
            cur.execute(
                "SELECT menu_nama, jumlah FROM detail_transaksi WHERE transaksi_id=?",
                (t_id,)
            )
            details = cur.fetchall()

            self.listbox.insert(tk.END, f"Meja {meja} | ID Transaksi: {t_id}")
            for menu, qty in details:
                self.listbox.insert(tk.END, f"  - {menu} x{qty}")

            self.listbox.insert(tk.END, f"Total : Rp {total:,.0f}")
            self.listbox.insert(tk.END, "-" * 70)

            self.order_ids.append(t_id)

        db.close()

    # =====================
    # VALIDASI
    # =====================
    def validasi_layanan(self):
        idx = self.listbox.curselection()
        if not idx:
            messagebox.showwarning("Pilih", "Pilih pesanan yang sudah disajikan")
            return

        # Cari ID terdekat ke atas
        selected_index = idx[0]
        transaksi_index = selected_index // 5
        transaksi_id = self.order_ids[transaksi_index]

        db = connect()
        cur = db.cursor()
        cur.execute(
            "UPDATE transaksi SET status='Disajikan' WHERE id=?",
            (transaksi_id,)
        )
        db.commit()
        db.close()

        messagebox.showinfo(
            "Sukses",
            "Pesanan ditandai selesai.\nKasir bisa memproses pembayaran."
        )
        self.load_orders()

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