import React from "react";
import { Table, Tag } from "antd";
import { SearchOutlined } from "@ant-design/icons";
import { useNavigate } from "react-router-dom";

import * as lib from "@clusterio/lib";

import { useRoles } from "../model/roles";
import { formatDuration } from "../util/time_format";
import {
	formatFirstSeen,
	formatLastSeen,
	sortFirstSeen,
	sortLastSeen,
	useUsers,
} from "../model/user";

import { onFilterUser, Username, useUserFilter } from "./UsersFilters";
import Link from "./Link";

export interface UsersTableProps {
	/**
	 * Optional instance id.
	 *  – If provided, instance-specific columns (Play Time, Join Count, First Seen) are shown.
	 *  – If omitted, global player statistics columns (Online Time, First/Last Seen) are shown.
	 */
	instanceId?: number;
	/** Show only players that are currently online, works with instanceId to show online of a particular instance */
	onlyOnline?: boolean;
	/** Ant Design pagination prop. Pass `false` to disable pagination. */
	pagination?: false | object;
	/** Ant Design size prop */
	size?: "small" | "middle" | "large";
}

const strcmp = new Intl.Collator(undefined, { numeric: true, sensitivity: "base" }).compare;

export default function UsersTable({ instanceId, onlyOnline = false, pagination, size }: UsersTableProps) {
	const [roles] = useRoles();
	const navigate = useNavigate();

	const {filterDropdown, filterDropdownProps} = useUserFilter(true);

	const [users] = useUsers();
	const data = [...users.values()];

	// Determine online predicate based on instanceId
	const isUserOnline = (user: lib.UserDetails) => {
		if (instanceId !== undefined) {
			return user.instances && user.instances.has(instanceId);
		}
		return user.instances && user.instances.size > 0;
	};

	// Prepare filters for roles column
	const roleFilters = [...roles.values()].map(role => ({ text: role.name, value: role.id }));

	const columns: any[] = [
		{
			title: "Name",
			key: "name",
			render: (_: any, user: lib.UserDetails) => (
				<Username user={user} withStatus />
			),
			defaultSortOrder: "ascend",
			sorter: (a: lib.UserDetails, b: lib.UserDetails) => strcmp(a.name, b.name),
			filterIcon: (filtered: boolean) => (
				<SearchOutlined style={{ color: filtered ? "#1677ff" : undefined }} />
			),
			onFilter: onFilterUser,
			filterDropdownProps,
			filterDropdown,
		},
		{
			title: "Roles",
			key: "roles",
			filters: roleFilters,
			filterMultiple: true,
			onFilter: (value: string | number | boolean, record: lib.UserDetails) => (
				record.roleIds.has(value as number)
			),
			render: (_: any, user: lib.UserDetails) => (
				[...user.roleIds].map((id) => (
					<Link key={id} to={`/roles/${id}/view`} onClick={(e) => e.stopPropagation()}>
						<Tag>{(roles.get(id) || { name: id }).name}</Tag>
					</Link>
				))
			),
		},
	];


	// Helper to get last seen timestamp
	function getLastSeenTimestamp(user: lib.UserDetails): number | undefined {
		const stats = instanceId !== undefined ? user.instanceStats.get(instanceId) : user.playerStats;
		if (!stats) { return undefined; }
		if (stats.lastLeaveAt && stats.lastLeaveAt.getTime() > (stats.lastJoinAt?.getTime() ?? 0)) {
			return stats.lastLeaveAt.getTime();
		}
		if (stats.lastJoinAt) {
			return stats.lastJoinAt.getTime();
		}
		return undefined;
	}

	if (instanceId !== undefined) {
		columns.push(
			{
				title: "Play Time",
				key: "playTime",
				render: (_: any, user: lib.UserDetails) => {
					const instanceStats = user.instanceStats.get(instanceId);
					return instanceStats?.onlineTimeMs ? formatDuration(instanceStats.onlineTimeMs) : "-";
				},
				sorter: (a: lib.UserDetails, b: lib.UserDetails) => {
					const statsA = a.instanceStats.get(instanceId);
					const statsB = b.instanceStats.get(instanceId);
					return (statsA?.onlineTimeMs ?? 0) - (statsB?.onlineTimeMs ?? 0);
				},
			},
			{
				title: "Join Count",
				key: "joinCount",
				render: (_: any, user: lib.UserDetails) => {
					const instanceStats = user.instanceStats.get(instanceId);
					return instanceStats?.joinCount ?? 0;
				},
				sorter: (a: lib.UserDetails, b: lib.UserDetails) => {
					const statsA = a.instanceStats.get(instanceId);
					const statsB = b.instanceStats.get(instanceId);
					return (statsA?.joinCount ?? 0) - (statsB?.joinCount ?? 0);
				},
			},
			{
				title: "First Seen",
				key: "firstSeen",
				render: (_: any, user: lib.UserDetails) => formatFirstSeen(user, instanceId),
				sorter: (a: lib.UserDetails, b: lib.UserDetails) => {
					const statsA = a.instanceStats.get(instanceId);
					const statsB = b.instanceStats.get(instanceId);
					const firstSeenA = statsA?.firstJoinAt?.getTime() ?? 0;
					const firstSeenB = statsB?.firstJoinAt?.getTime() ?? 0;
					return firstSeenA - firstSeenB;
				},
			},
		);
	} else {
		columns.push(
			{
				title: "Online time",
				key: "onlineTime",
				render: (_: any, user: lib.UserDetails) => (user.playerStats?.onlineTimeMs
					? formatDuration(user.playerStats.onlineTimeMs)
					: null),
				// eslint-disable-next-line max-len
				sorter: (a: lib.UserDetails, b: lib.UserDetails) => (a.playerStats?.onlineTimeMs ?? 0) - (b.playerStats?.onlineTimeMs ?? 0),
				responsive: ["lg"],
			},
			{
				title: "First seen",
				key: "firstSeen",
				render: (_: any, user: lib.UserDetails) => formatFirstSeen(user),
				sorter: (a: lib.UserDetails, b: lib.UserDetails) => sortFirstSeen(a, b),
			},
		);
	}
	columns.push(
		{
			title: "Last seen",
			key: "lastSeen",
			filterMultiple: false,
			defaultFilteredValue: onlyOnline ? ["online"] : undefined,
			filters: [
				{ text: "Online", value: "online" },
				{ text: "24h", value: "24h" },
				{ text: "7d", value: "7d" },
				{ text: "30d", value: "30d" },
			],
			onFilter: (value: string | number | boolean, record: lib.UserDetails) => {
				const online = isUserOnline(record);
				if (value === "online") {
					return online;
				}
				// Online players should appear in all buckets
				if (online) {
					return true;
				}
				const ts = getLastSeenTimestamp(record);
				if (!ts) { return false; }
				const diff = Date.now() - ts;
				switch (value) {
					case "24h":
						return diff <= 24 * 60 * 60 * 1000;
					case "7d":
						return diff <= 7 * 24 * 60 * 60 * 1000;
					case "30d":
						return diff <= 30 * 24 * 60 * 60 * 1000;
					default:
						return false;
				}
			},
			sorter: (a: lib.UserDetails, b: lib.UserDetails) => sortLastSeen(a, b, instanceId, instanceId),
			render: (_: any, user: lib.UserDetails) => formatLastSeen(user, instanceId),
			// Responsive breaks defaultFilteredValue, see: https://github.com/ant-design/ant-design/issues/32847
			// responsive: ["lg"],
		},
	);

	const defaultPagination = pagination === undefined
		? {
			defaultPageSize: 50,
			showSizeChanger: true,
			pageSizeOptions: ["10", "20", "50", "100", "200"],
			showTotal: (total: number) => `${total} Users`,
		}
		: pagination;

	return (
		<Table
			columns={columns}
			dataSource={data}
			rowKey={(user) => user.name}
			pagination={defaultPagination}
			size={size}
			scroll={{ x: "max-content" }}
			onRow={(user) => ({
				onClick: (event) => {
					if ((event.target as HTMLElement).closest("a")) {
						return;
					}
					navigate(`/users/${user.name}/view`);
				},
			})}
		/>
	);
}