"use client";

import { createPayment } from "@/actions/payment";
import DeviceCard from "@/components/device-card";
import NumberInput from "@/components/number-input";
import { Button } from "@/components/ui/button";
import {
  deviceCartAtom,
  numberOfMonths
} from "@/lib/atoms";
import { authClient } from "@/lib/auth-client";
import type { PaymentType } from "@/lib/types";
import type { BillFormula } from "@prisma/client";
import { useAtom, useAtomValue, useSetAtom } from "jotai";
import {
  CircleDollarSign,
  Loader2
} from "lucide-react";
import { usePathname } from "next/navigation";
import { useEffect, useState } from "react";
export default function DevicesForPayment({
  billFormula,
}: {
  billFormula?: BillFormula;
}) {
  const baseAmount = billFormula?.baseAmount || 100;
  const discountPercentage = billFormula?.discountPercentage || 75;
  const session = authClient.useSession();
  const pathname = usePathname();
  const devices = useAtomValue(deviceCartAtom);
  const setDeviceCart = useSetAtom(deviceCartAtom);
  const [months, setMonths] = useAtom(numberOfMonths);
  const [message, setMessage] = useState("");
  const [disabled, setDisabled] = useState(false);
  const [total, setTotal] = useState(0);
  useEffect(() => {
    if (months === 7) {
      setMessage("You will get 1 month free.");
    } else if (months === 12) {
      setMessage("You will get 2 months free.");
    } else {
      setMessage("");
    }
    setTotal(baseAmount + ((devices.length + 1) - 1) * discountPercentage);
  }, [months, devices.length, baseAmount, discountPercentage]);

  if (pathname === "/payment") {
    return null;
  }

  const data: PaymentType = {
    numberOfMonths: months,
    userId: session?.data?.user.id ?? "",
    deviceIds: devices.map((device) => device.id),
    amount: Number.parseFloat(total.toFixed(2)),
    paid: false,
  };

  return (
    <div className="max-w-lg mx-auto space-y-4 px-4">
      <div className="flex max-h-[calc(100svh-400px)] flex-col overflow-auto pb-4 gap-4">
        {devices.map((device) => (
          <DeviceCard key={device.id} device={device} />
        ))}
      </div>
      <div className="flex flex-col gap-4">
        <NumberInput
          label="Set No of Months"
          value={months}
          onChange={(value: number) => setMonths(value)}
          maxAllowed={12}
          isDisabled={devices.length === 0}
        />
        {message && (
          <span className="title-bg text-lime-800 bg-lime-100/50 dark:text-lime-100 rounded text-center p-2 w-full">
            {message}
          </span>
        )}
      </div>
      <Button
        onClick={async () => {
          setDisabled(true);
          await createPayment(data);
          setDeviceCart([]);
          setMonths(1);
          setDisabled(false);

        }}
        className="w-full"
        disabled={devices.length === 0 || disabled}
      >
        {disabled ? (
          <>
            <Loader2 className="ml-2 animate-spin" />
          </>
        ) : (
          <>
            Go to payment
            <CircleDollarSign />
          </>
        )}
      </Button>

    </div>
  )
}