import { useState, useEffect, useCallback } from "react";

import { getAcademicsApi, deleteAcademicsApi } from "@/api/academics";
import { exportToExcel } from "@/utils/exportToExcel";

import {
	Table,
	TableBody,
	TableCell,
	TableHead,
	TableHeader,
	TableRow,
} from "@/components/ui/table";

import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";

import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";

import { Loader2, Trash, RefreshCw, Download } from "lucide-react";

export default function AcademicsPage() {
	const [records, setRecords] = useState<any[]>([]);
	const [loading, setLoading] = useState(true);

	const [searchText, setSearchText] = useState("");

	const fetchAll = useCallback(async () => {
		setLoading(true);
		try {
			const res = await getAcademicsApi();
			setRecords(res?.data || []);
		} catch (err) {
			console.error(err);
		} finally {
			setLoading(false);
		}
	}, []);

	useEffect(() => {
		fetchAll();
	}, [fetchAll]);

	const filteredRecords = records.filter((item) => {
		return (
			item.fullName?.toLowerCase().includes(searchText.toLowerCase()) ||
			item.number?.includes(searchText) ||
			item.emailId?.toLowerCase().includes(searchText.toLowerCase()) ||
			item.subject?.toLowerCase().includes(searchText.toLowerCase()) ||
			item.courseName?.toLowerCase().includes(searchText.toLowerCase())
		);
	});

	async function handleDelete(id: number) {
		if (!confirm("Delete record?")) return;
		await deleteAcademicsApi(id);
		fetchAll();
	}

	const handleExport = () => {
		const exportData = filteredRecords.map((item) => ({
			ID: item.id,
			Name: item.fullName,
			Phone: item.number,
			Email: item.emailId,
			Course: item.courseName,
			Subject: item.subject,
			Message: item.message,
			Date: new Date(item.createdAt).toLocaleDateString(),
		}));

		exportToExcel(exportData, "academics");
	};

	return (
		<div className="p-6 space-y-6">
			<div className="flex justify-between items-center gap-3 flex-wrap">
				<h1 className="text-2xl font-bold">Academics & Research</h1>

				<div className="flex flex-wrap gap-2">
					<Input
						placeholder="Search name / phone / email / subject..."
						value={searchText}
						onChange={(e) => setSearchText(e.target.value)}
						className="w-[260px]"
					/>

					<Button variant="outline" onClick={fetchAll} disabled={loading}>
						<RefreshCw className="mr-2 h-4 w-4" />
						Refresh
					</Button>

					<Button variant="outline" onClick={handleExport}>
						<Download className="mr-2 h-4 w-4" />
						Export
					</Button>
				</div>
			</div>

			<Card>
				<CardHeader>
					<CardTitle>Academics Records</CardTitle>
				</CardHeader>

				<CardContent>
					<div className="overflow-x-auto">
						<Table className="min-w-[1000px]">
							<TableHeader>
								<TableRow>
									<TableHead>ID</TableHead>
									<TableHead>Name</TableHead>
									<TableHead>Phone</TableHead>
									<TableHead>Email</TableHead>
									<TableHead>Course</TableHead>
									<TableHead>Subject</TableHead>
									<TableHead>Message</TableHead>
									<TableHead>Date</TableHead>
									<TableHead>Actions</TableHead>
								</TableRow>
							</TableHeader>

							<TableBody>
								{loading ? (
									<TableRow>
										<TableCell colSpan={9} className="text-center">
											<Loader2 className="h-6 w-6 animate-spin mx-auto" />
										</TableCell>
									</TableRow>
								) : filteredRecords.length === 0 ? (
									<TableRow>
										<TableCell colSpan={9} className="text-center">
											No records found
										</TableCell>
									</TableRow>
								) : (
									filteredRecords.map((item) => (
										<TableRow key={item.id}>
											<TableCell>{item.id}</TableCell>
											<TableCell>{item.fullName}</TableCell>
											<TableCell>{item.number}</TableCell>
											<TableCell>{item.emailId}</TableCell>

											<TableCell>{item.courseName}</TableCell>
											<TableCell>{item.subject}</TableCell>

											<TableCell className="max-w-[250px] whitespace-normal">
												{item.message}
											</TableCell>

											<TableCell>
												{new Date(item.createdAt).toLocaleDateString()}
											</TableCell>

											<TableCell>
												<Button
													size="sm"
													variant="destructive"
													onClick={() => handleDelete(item.id)}>
													<Trash className="h-4 w-4" />
												</Button>
											</TableCell>
										</TableRow>
									))
								)}
							</TableBody>
						</Table>
					</div>
				</CardContent>
			</Card>
		</div>
	);
}