import { useState, useEffect, useCallback } from 'react';
import { getAllInquiriesApi, HealthInquiry } from '@/api/healthCheck';

import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from '@/components/ui/table';
import { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from '@/components/ui/tooltip';
import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Badge } from '@/components/ui/badge';
import { Loader2, RefreshCw, ChevronLeft, ChevronRight, CalendarDays } from 'lucide-react';

export default function PackageInquiriesTab() {
	const [inquiries, setInquiries] = useState<HealthInquiry[]>([]);
	const [loading, setLoading] = useState(true);

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

	const [dateMode, setDateMode] = useState<'preferred' | 'booked'>('preferred');

	const [filterDate, setFilterDate] = useState('');
	const [startDate, setStartDate] = useState('');
	const [endDate, setEndDate] = useState('');

	const [createdDate, setCreatedDate] = useState('');
	const [createdStartDate, setCreatedStartDate] = useState('');
	const [createdEndDate, setCreatedEndDate] = useState('');

	const [currentPage, setCurrentPage] = useState(1);
	const [itemsPerPage, setItemsPerPage] = useState(10);
	const [totalItems, setTotalItems] = useState(0);
	const [totalPages, setTotalPages] = useState(1);

	const fetchInquiries = useCallback(async () => {
		setLoading(true);
		try {
			const res = await getAllInquiriesApi(
				currentPage,
				itemsPerPage,
				filterDate,
				startDate,
				endDate,
				createdDate,
				createdStartDate,
				createdEndDate,
				searchText
			);
			setInquiries(res.data || []);
			setTotalItems(res.pagination?.total || 0);
			setTotalPages(res.pagination?.totalPages || 1);
		} catch (err) {
			console.error('Failed to fetch inquiries', err);
		} finally {
			setLoading(false);
		}
	}, [
		currentPage,
		itemsPerPage,
		filterDate,
		startDate,
		endDate,
		createdDate,
		createdStartDate,
		createdEndDate,
		searchText,
	]);

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

	const handleModeChange = (newMode: 'preferred' | 'booked') => {
		setDateMode(newMode);
		setFilterDate('');
		setStartDate('');
		setEndDate('');
		setCreatedDate('');
		setCreatedStartDate('');
		setCreatedEndDate('');
		setCurrentPage(1);
	};

	useEffect(() => {
		setCurrentPage(1);
	}, [searchText, filterDate, startDate, endDate, createdDate, createdStartDate, createdEndDate, itemsPerPage]);

	const indexOfFirstItem = (currentPage - 1) * itemsPerPage;
	const indexOfLastItem = Math.min(currentPage * itemsPerPage, totalItems);

	return (
		<Card className="shadow-sm">
			<CardHeader className="flex flex-col gap-4 border-b pb-4 w-full">
				<div className="flex flex-col sm:flex-row items-start sm:items-center justify-between gap-2 w-full">
					<CardTitle className="text-xl flex items-center gap-2">
						<span>Package Inquiries</span>
					</CardTitle>
					<Button variant="outline" size="sm" onClick={fetchInquiries} disabled={loading} className="text-sm">
						<RefreshCw className={`mr-2 h-4 w-4 ${loading ? 'animate-spin' : ''}`} />
						Refresh
					</Button>
				</div>

				<div className="grid grid-cols-1 xl:grid-cols-4 gap-4 bg-muted/20 p-4 rounded-lg border w-full">
					<div className="flex flex-col gap-1.5 w-full">
						<label className="text-xs font-bold text-muted-foreground uppercase tracking-wider">Search Inquiry</label>
						<Input
							placeholder="Search name, phone, email, or package name..."
							value={searchText}
							onChange={(e) => setSearchText(e.target.value)}
							className="text-base h-10 bg-background w-full"
						/>
					</div>

					<div className="flex flex-col gap-1.5 w-full">
						<label className="text-xs font-bold text-muted-foreground uppercase tracking-wider flex items-center gap-1">
							<CalendarDays className="h-3.5 w-3.5 text-primary" /> Filter Date By
						</label>
						<select
							value={dateMode}
							onChange={(e) => handleModeChange(e.target.value as 'preferred' | 'booked')}
							className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm font-medium focus:ring-2 focus:ring-primary focus:outline-none"
						>
							<option value="preferred">🗓️ Preferred Date</option>
							<option value="booked">✍️ Booked Date (Created)</option>
						</select>
					</div>

					<div className="flex items-end gap-2 p-1.5 bg-background rounded-md border border-dashed flex-wrap sm:flex-nowrap w-full">
						<div className="flex flex-col gap-1 flex-1 min-w-[80px]">
							<span className="text-[10px] font-bold text-muted-foreground uppercase">Specific Day</span>
							<Input
								type="date"
								value={dateMode === 'preferred' ? filterDate : createdDate}
								onChange={(e) =>
									dateMode === 'preferred' ? setFilterDate(e.target.value) : setCreatedDate(e.target.value)
								}
								className="text-sm h-8"
								disabled={dateMode === 'preferred' ? !!startDate || !!endDate : !!createdStartDate || !!createdEndDate}
							/>
						</div>

						<div className="flex flex-col gap-1 flex-1 min-w-[80px]">
							<span className="text-[10px] font-bold text-muted-foreground uppercase">From Range</span>
							<Input
								type="date"
								value={dateMode === 'preferred' ? startDate : createdStartDate}
								onChange={(e) =>
									dateMode === 'preferred' ? setStartDate(e.target.value) : setCreatedStartDate(e.target.value)
								}
								className="text-sm h-8"
								disabled={dateMode === 'preferred' ? !!filterDate : !!createdDate}
							/>
						</div>

						<div className="flex flex-col gap-1 flex-1 min-w-[80px]">
							<span className="text-[10px] font-bold text-muted-foreground uppercase">To Range</span>
							<Input
								type="date"
								value={dateMode === 'preferred' ? endDate : createdEndDate}
								onChange={(e) =>
									dateMode === 'preferred' ? setEndDate(e.target.value) : setCreatedEndDate(e.target.value)
								}
								className="text-sm h-8"
								disabled={dateMode === 'preferred' ? !!filterDate : !!createdDate}
							/>
						</div>
					</div>

					<div className="flex flex-col gap-1.5 w-full">
						<label className="text-xs font-bold text-muted-foreground uppercase tracking-wider">Page Sizing</label>
						<select
							value={itemsPerPage}
							onChange={(e) => setItemsPerPage(Number(e.target.value))}
							className="flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:ring-2 focus:ring-primary focus:outline-none"
						>
							<option value={5}>5 Rows</option>
							<option value={10}>10 Rows</option>
							<option value={20}>20 Rows</option>
							<option value={50}>50 Rows</option>
						</select>
					</div>
				</div>
			</CardHeader>
			<CardContent className="p-0 sm:p-6 sm:pt-4">
				<div className="rounded-md border overflow-x-auto overflow-y-auto max-h-[650px] relative">
					<Table className="w-full min-w-[1100px] table-fixed border-separate border-spacing-0">
						<TableHeader className="sticky top-0 z-20 bg-background shadow-sm">
							<TableRow>
								<TableHead className="w-[145px] font-bold bg-background text-sm">Preferred Date</TableHead>
								<TableHead className="w-[145px] font-bold bg-background text-sm">Booked Date</TableHead>
								<TableHead className="w-[220px] font-bold bg-background text-sm">Patient Details</TableHead>
								<TableHead className="w-[240px] font-bold bg-background text-sm">Requested Package</TableHead>
								<TableHead className="w-[120px] font-bold bg-background text-sm">Demographics</TableHead>
								<TableHead className="w-[230px] font-bold bg-background text-sm">Message</TableHead>
							</TableRow>
						</TableHeader>
						<TableBody>
							{loading ? (
								<TableRow>
									<TableCell colSpan={6} className="text-center py-10">
										<Loader2 className="h-8 w-8 animate-spin mx-auto text-primary" />
									</TableCell>
								</TableRow>
							) : inquiries.length === 0 ? (
								<TableRow>
									<TableCell colSpan={6} className="text-center text-muted-foreground py-10 text-base">
										No package inquiries matched your active search filters.
									</TableCell>
								</TableRow>
							) : (
								inquiries.map((inq) => (
									<TableRow key={inq.id} className="hover:bg-muted/50 transition-colors">
										<TableCell>
											{inq.preferredDate ? (
												<div
													className={`text-sm font-semibold rounded px-1.5 py-0.5 inline-block ${dateMode === 'preferred' ? 'bg-primary/10 text-primary' : 'bg-muted'}`}
												>
													{new Date(inq.preferredDate).toLocaleDateString('en-GB')}
												</div>
											) : (
												<span className="text-xs text-muted-foreground italic">Not specified</span>
											)}
										</TableCell>
										<TableCell>
											<div
												className={`text-sm rounded px-1.5 py-0.5 inline-block ${dateMode === 'booked' ? 'bg-sky-500/10 text-sky-600 font-semibold' : 'text-muted-foreground'}`}
											>
												{new Date(inq.createdAt).toLocaleDateString('en-GB')}
											</div>
										</TableCell>
										<TableCell>
											<div className="font-semibold text-base text-gray-900 truncate">{inq.fullName}</div>
											<div className="text-sm text-gray-700 mt-0.5">{inq.mobileNumber}</div>
											{inq.email && <div className="text-xs text-muted-foreground truncate">{inq.email}</div>}
										</TableCell>
										<TableCell>
											<div className="font-semibold text-sm line-clamp-2 text-gray-800" title={inq.healthPackage?.name}>
												{inq.healthPackage?.name || 'N/A'}
											</div>
											{inq.healthPackage?.category?.name && (
												<Badge variant="secondary" className="text-[10px] font-normal px-2 py-0 mt-1">
													{inq.healthPackage.category.name}
												</Badge>
											)}
										</TableCell>
										<TableCell>
											<div className="font-medium text-sm text-gray-800">{inq.age ? `${inq.age} yrs` : '—'}</div>
											<div className="text-xs text-muted-foreground capitalize mt-0.5">
												{inq.gender || 'unspecified'}
											</div>
										</TableCell>
										<TableCell>
											<TooltipProvider>
												<Tooltip>
													<TooltipTrigger asChild>
														<div className="text-sm italic line-clamp-3 text-muted-foreground whitespace-pre-wrap cursor-pointer leading-relaxed hover:text-foreground transition-colors">
															{inq.message || 'No message provided.'}
														</div>
													</TooltipTrigger>
													<TooltipContent className="max-w-md whitespace-pre-wrap p-3 bg-popover text-popover-foreground border shadow-md rounded-md">
														{inq.message || 'No message provided.'}
													</TooltipContent>
												</Tooltip>
											</TooltipProvider>
										</TableCell>
									</TableRow>
								))
							)}
						</TableBody>
					</Table>
				</div>

				{!loading && totalItems > 0 && (
					<div className="flex flex-col sm:flex-row items-center justify-between px-2 py-4 border-t gap-4 mt-2">
						<div className="text-sm text-muted-foreground">
							Showing <span className="font-semibold">{indexOfFirstItem + 1}</span> to{' '}
							<span className="font-semibold">{indexOfLastItem}</span> of{' '}
							<span className="font-semibold">{totalItems}</span> inquiries
						</div>
						<div className="flex items-center gap-6">
							<div className="text-sm font-medium text-gray-700">
								Page {currentPage} of {totalPages || 1}
							</div>
							<div className="flex gap-1">
								<Button
									variant="outline"
									size="icon"
									className="h-9 w-9"
									onClick={() => setCurrentPage((prev) => Math.max(prev - 1, 1))}
									disabled={currentPage === 1}
								>
									<ChevronLeft className="h-4 w-4" />
								</Button>
								<Button
									variant="outline"
									size="icon"
									className="h-9 w-9"
									onClick={() => setCurrentPage((prev) => Math.min(prev + 1, totalPages))}
									disabled={currentPage === totalPages || totalPages === 0}
								>
									<ChevronRight className="h-4 w-4" />
								</Button>
							</div>
						</div>
					</div>
				)}
			</CardContent>
		</Card>
	);
}