"use client";
import { useMemo, useState } from "react";
import useSWR from "swr";
import Map from "@components/Map";
import Sidebar from "@components/Sidebar";
import { createPoster } from "@utils/axiosHelpers";
import { Earthquake } from "@prismaclient";
import { getRelativeDate } from "@utils/formatters";
import GeologicalEvent from "@appTypes/Event";
import axios from "axios";
import EarthquakeLogModal from "@components/EarthquakeLogModal";
import { useStoreState } from "@hooks/store";

// --- NO ACCESS MODAL ---
function NoAccessModal({ open, onClose }) {
    if (!open) return null;
    return (
        <div className="fixed z-50 inset-0 bg-black/40 flex items-center justify-center">
            <div className="bg-white rounded-lg shadow-lg p-8 max-w-xs w-full text-center relative">
                <button 
                    onClick={onClose} 
                    className="absolute right-4 top-4 text-gray-500 hover:text-black text-lg"
                    aria-label="Close"
                >&times;</button>
                <h2 className="font-bold text-xl mb-4">Access Denied</h2>
                <p className="text-gray-600 mb-3">Sorry, you do not have access rights to Log an Earthquake. Please Log in here, or contact an Admin if you believe this is a mistake</p>
                <button 
                    onClick={onClose} 
                    className="bg-blue-600 text-white px-6 py-2 rounded hover:bg-blue-700 mt-2"
                >OK</button>
            </div>
        </div>
    );
}

// --- SEARCH MODAL COMPONENT ---
function EarthquakeSearchModal({ open, onClose, onSelect }) {
    const [search, setSearch] = useState("");
    const [results, setResults] = useState([]);
    const [loading, setLoading] = useState(false);
    const handleSearch = async (e) => {
        e.preventDefault();
        setLoading(true);
        setResults([]);
        try {
            const res = await axios.post("/api/earthquakes/search", { query: search });
            setResults(res.data.earthquakes || []);
        } catch (e) {
            alert("Failed to search.");
        }
        setLoading(false);
    };
    if (!open) return null;
    return (
        <div className="fixed z-50 inset-0 bg-black/40 flex items-center justify-center">
            <div className="bg-white rounded-lg shadow-lg p-6 max-w-lg w-full relative">
                <button onClick={onClose} className="absolute right-4 top-4 text-gray-500 hover:text-black text-lg">
                    &times;
                </button>
                <h2 className="font-bold text-xl mb-4">Search Earthquakes</h2>
                <form onSubmit={handleSearch} className="flex gap-2 mb-4">
                    <input
                        type="text"
                        placeholder="e.g. Mexico, EV-7.4-Mexico-00035"
                        value={search}
                        onChange={(e) => setSearch(e.target.value)}
                        className="flex-grow px-3 py-2 border rounded"
                        required
                    />
                    <button type="submit" className="bg-blue-600 text-white px-4 py-2 rounded hover:bg-blue-700">
                        {loading ? "Searching..." : "Search"}
                    </button>
                </form>
                <div>
                    {results.length === 0 && !loading && search !== "" && <p className="text-gray-400 text-sm">No results found.</p>}
                    <ul>
                        {results.map((eq) => (
                            <li
                                key={eq.id}
                                className="border-b py-2 cursor-pointer hover:bg-gray-50 flex items-center justify-between"
                                onClick={() => {
                                    onSelect(eq);
                                    onClose();
                                }}
                                tabIndex={0}
                            >
                                <div>
                                    <strong>{eq.code}</strong> <span>{eq.location}</span>{" "}
                                    <span className="text-xs text-gray-500">{new Date(eq.date).toLocaleDateString()}</span>
                                </div>
                                <div
                                    className={`rounded-full px-2 py-1 ml-2 text-white font-semibold ${
                                        eq.magnitude >= 7 ? "bg-red-500" : eq.magnitude >= 6 ? "bg-orange-400" : "bg-yellow-400"
                                    }`}
                                >
                                    {eq.magnitude}
                                </div>
                            </li>
                        ))}
                    </ul>
                </div>
            </div>
        </div>
    );
}

// --- MAIN PAGE COMPONENT ---
export default function Earthquakes() {
    const [selectedEventId, setSelectedEventId] = useState("");
    const [hoveredEventId, setHoveredEventId] = useState("");
    const [searchModalOpen, setSearchModalOpen] = useState(false);
    const [logModalOpen, setLogModalOpen] = useState(false); 
    const [noAccessModalOpen, setNoAccessModalOpen] = useState(false);

    const user = useStoreState((state) => state.user);
    const role: "GUEST" | "SCIENTIST" | "ADMIN" = user?.role ?? "GUEST";
    const canLogEarthquake = role === "SCIENTIST" || role === "ADMIN";

    // Fetch recent earthquakes
    const { data, error, isLoading, mutate } = useSWR("/api/earthquakes", createPoster({ rangeDaysPrev: 10 }));

    // Prepare events
    const earthquakeEvents = useMemo(
        () =>
            data && data.earthquakes
                ? data.earthquakes
                        .map(
                            (x: Earthquake): GeologicalEvent => ({
                                id: x.code,
                                title: `Earthquake in ${x.location || (x.code && x.code.split("-")[2])}`,
                                magnitude: x.magnitude,
                                longitude: x.longitude,
                                latitude: x.latitude,
                                text1: "",
                                text2: getRelativeDate(x.date),
                                date: x.date,
                            })
                        )
                        .sort((a: GeologicalEvent, b: GeologicalEvent) => new Date(b.date).getTime() - new Date(a.date).getTime())
                : [],
        [data]
    );

    // This handler is always called, regardless of button state!
    const handleLogClick = () => {
        if (canLogEarthquake) {
            setLogModalOpen(true);
        } else {
            setNoAccessModalOpen(true);
        }
    };

    return (
        <div className="flex h-[calc(100vh-3.5rem)] w-full overflow-hidden">
            <div className="flex-grow h-full">
                <Map
                    events={earthquakeEvents}
                    selectedEventId={selectedEventId}
                    setSelectedEventId={setSelectedEventId}
                    hoveredEventId={hoveredEventId}
                    setHoveredEventId={setHoveredEventId}
                    mapType="Earthquakes"
                />
            </div>
            <Sidebar
                logTitle="Log an Earthquake"
                logSubtitle="Record new earthquakes - time/date, location, magnitude, observatory and scientists"
                recentsTitle="Recent Earthquakes"
                events={earthquakeEvents}
                selectedEventId={selectedEventId}
                setSelectedEventId={setSelectedEventId}
                hoveredEventId={hoveredEventId}
                setHoveredEventId={setHoveredEventId}
                button1Name="Log an Earthquake"
                button2Name="Search Earthquakes"
                onButton1Click={handleLogClick}        // <--- Important!
                onButton2Click={() => setSearchModalOpen(true)} 
                button1Disabled={!canLogEarthquake}    // <--- For style only!
            />
            <EarthquakeSearchModal
                open={searchModalOpen}
                onClose={() => setSearchModalOpen(false)}
                onSelect={(eq) => setSelectedEventId(eq.code)}
            />
            <EarthquakeLogModal
                open={logModalOpen}
                onClose={() => setLogModalOpen(false)}
                onSuccess={() => mutate()} // To refresh
            />
            <NoAccessModal
                open={noAccessModalOpen}
                onClose={() => setNoAccessModalOpen(false)}
            />
        </div>
    );
}