"use client";

import { useEffect, useState, useCallback } from "react";
import axios from "axios";
import { ApiServerBaseUrl } from "@/utils/baseurl.utils";
import { getSocialAuthStatus } from "@/utils/commonFunction.utils";
import { useRouter } from "next/navigation";

const ONE_HOUR = 3600;

const AutomationPage = () => {
    const router = useRouter();

    const [limit, setLimit] = useState<number>(20);
    const [loading, setLoading] = useState(false);
    const [lastRun, setLastRun] = useState<string>("");
    const [nextRunIn, setNextRunIn] = useState<number>(ONE_HOUR);

    /* ------------------------------------------------------------
     Validate payment + social login
    ------------------------------------------------------------ */
    useEffect(() => {
        async function validate() {
            const userEmail = localStorage.getItem("user_email");
            if (!userEmail) {
                router.push("/social-media-connect");
                return;
            }

            const storedUser = localStorage.getItem("userDetails");
            if (!storedUser) {
                router.push("/social-media-connect");
                return;
            }

            const user = JSON.parse(storedUser);
            const role = user?.role;

            // ✅ CUSTOMER → pricing check FIRST
            if (role === "customer") {
                const session = localStorage.getItem("payment_session");
                if (!session) {
                    router.push("/pricing");
                    return;
                }
            }

            // ✅ ALL ROLES → social media connect check
            const res = await getSocialAuthStatus(userEmail);

            if (!res?.connected) {
                router.push("/social-media-connect");
                return;
            }
        }
        validate();
    }, [router]);

    /* ------------------------------------------------------------
     Auto Reply Function (wrapped in useCallback)
    ------------------------------------------------------------ */
    const triggerAutoReply = useCallback(async () => {
        if (!limit || limit <= 0) {
            alert("Please enter a valid limit number");
            return;
        }

        try {
            setLoading(true);

            await axios.post(
                `${ApiServerBaseUrl}/social/automation/auto-reply?userId=${localStorage.getItem("user_email")}`,
                { limit }
            );

            const now = new Date().toLocaleString();
            setLastRun(now);

            const nextTime = Date.now() + ONE_HOUR * 1000;
            localStorage.setItem("nextRunTimestamp", nextTime.toString());

            setNextRunIn(ONE_HOUR);
        } catch (error: any) {
            alert(error.response?.data?.message || "Auto reply failed");
        } finally {
            setLoading(false);
        }
    }, [limit]);

    /* ------------------------------------------------------------
     Load saved next run or trigger if expired
    ------------------------------------------------------------ */
    useEffect(() => {
        const savedTime = localStorage.getItem("nextRunTimestamp");

        if (savedTime) {
            const diff = Math.floor((Number(savedTime) - Date.now()) / 1000);

            if (diff > 0) {
                setNextRunIn(diff);
            } else {
                triggerAutoReply();
            }
        } else {
            const nextTime = Date.now() + ONE_HOUR * 1000;
            localStorage.setItem("nextRunTimestamp", nextTime.toString());
        }
    }, [triggerAutoReply]);

    /* ------------------------------------------------------------
     Countdown timer
    ------------------------------------------------------------ */
    useEffect(() => {
        const timer = setInterval(() => {
            setNextRunIn((prev) => {
                if (prev <= 1) {
                    triggerAutoReply();
                    return ONE_HOUR;
                }
                return prev - 1;
            });
        }, 1000);

        return () => clearInterval(timer);
    }, [triggerAutoReply]);

    const formatTime = (sec: number) => {
        const m = Math.floor(sec / 60);
        const s = sec % 60;
        return `${m}m ${s < 10 ? "0" + s : s}s`;
    };

    return (
        <div className="relative min-h-[88vh] flex items-center justify-center overflow-hidden bg-[#111111] px-4">

            {/* Floating background bubbles */}
            <div className="absolute bottom-[-100px] left-[10%] w-[70px] h-[70px] rounded-full bg-pink-500/40 blur-xl animate-floatUp"></div>
            <div className="absolute bottom-[-120px] left-[30%] w-[90px] h-[90px] rounded-full bg-blue-500/40 blur-xl animate-floatUpSlow"></div>
            <div className="absolute bottom-[-110px] left-[60%] w-[60px] h-[60px] rounded-full bg-green-500/40 blur-xl animate-floatUpFast"></div>

            <div className="w-full max-w-md bg-white/10 shadow-2xl rounded-2xl p-8 border border-[#000]/20">
                <h2 className="text-3xl font-bold bg-gradient-to-r from-blue-400 to-pink-400 bg-clip-text text-transparent text-center mb-6">
                    Instagram Auto Reply
                </h2>

                <div className="mb-5">
                    <label className="block text-left text-gray-300 font-medium mb-2">
                        Auto Reply Limit
                    </label>
                    <input
                        type="number"
                        className="w-full px-4 py-3 border rounded-xl 
                        text-lg focus:ring-2 focus:ring-blue-500 
                        focus:outline-none bg-[#111111] border-[#111111]/60 text-white"
                        value={limit}
                        onChange={(e) => setLimit(Number(e.target.value))}
                    />
                </div>

                <button
                    onClick={triggerAutoReply}
                    disabled={loading}
                    title="Click to manually trigger the automation script to scan for new comments and reply."
                    className="w-full bg-gradient-to-r from-blue-600 to-pink-500 
                    text-white py-3 rounded-xl font-semibold shadow-lg 
                    transition-all hover:opacity-90"
                >
                    {loading ? "Processing..." : "Start Auto Reply"}
                </button>

                <p className="mt-4 text-[10px] text-gray-500 text-center leading-tight">
                    * This tool uses the `instagram_manage_comments` permission to fetch your recent posts' comments and apply pre-configured automated responses.
                </p>

                {lastRun && (
                    <p className="text-center mt-4 text-gray-300">
                        Last executed: <b className="text-white">{lastRun}</b>
                    </p>
                )}

                <p className="text-center mt-4 text-blue-300 font-semibold text-lg">
                    ⏳ Next auto-run in:{" "}
                    <span className="text-pink-400">{formatTime(nextRunIn)}</span>
                </p>

                <p className="text-center mt-6 text-xs text-gray-500">
                    Auto reply runs automatically every 1 hour.
                </p>
            </div>
        </div>
    );
};

export default AutomationPage;