import { Badge } from '@automattic/components';
import { formatNumber } from '@automattic/number-formatters';
import { useTranslate } from 'i18n-calypso';
import moment from 'moment';
import { useMemo } from 'react';
import { LogType, PHPLog, ServerLog } from 'calypso/data/hosting/use-site-logs-query';
import { useSelector } from 'calypso/state';
import { getCurrentUserLocale } from 'calypso/state/current-user/selectors';
import { useCurrentSiteGmtOffset } from './use-current-site-gmt-offset';
import type { Field, Operator } from '@wordpress/dataviews';

const getLabelCached = ( cached: string ) => {
	switch ( cached ) {
		case 'false':
			return 'False';
		case 'true':
			return 'True';
		default:
			return cached;
	}
};
const getLabelRenderer = ( renderer: string ) => {
	switch ( renderer ) {
		case 'php':
			return 'PHP';
		case 'static':
			return 'Static';
		default:
			return renderer;
	}
};
export const VALUES_CACHED = [ 'false', 'true' ];
export const VALUES_RENDERER = [ 'php', 'static' ];
export const VALUES_REQUEST_TYPE = [ 'GET', 'HEAD', 'POST', 'PUT', 'DELETE' ];
export const VALUES_SEVERITY = [ 'User', 'Warning', 'Deprecated', 'Fatal error' ];
export const VALUES_STATUS = [ '200', '301', '302', '400', '401', '403', '404', '429', '500' ];

const useFields = ( { logType }: { logType: LogType } ): Field< ServerLog | PHPLog >[] => {
	const translate = useTranslate();
	const locale = useSelector( getCurrentUserLocale );
	const siteGmtOffset = useCurrentSiteGmtOffset();
	const siteGsmOffsetDisplay =
		siteGmtOffset === 0 ? 'UTC' : `UTC${ siteGmtOffset > 0 ? '+' : '' }${ siteGmtOffset }`;

	const getFormattedDate = useMemo(
		() => ( value: string ) => {
			const dateFormat = locale === 'en' ? 'll [at] h:mm A' : 'h:mm A, ll';
			const formattedDate = moment( value )
				.utcOffset( siteGmtOffset * 60 )
				.format( dateFormat );
			return <span>{ formattedDate }</span>;
		},
		[ locale, siteGmtOffset ]
	);

	const fields = useMemo( () => {
		if ( logType === LogType.PHP ) {
			return [
				{
					id: 'timestamp',
					type: 'date',
					// translators: %(siteGsmOffsetDisplay)s will be replaced with the timezone offset of the site, e.g. GMT, GMT +1, GMT -1.
					label: translate( 'Date & time (%(siteGsmOffsetDisplay)s)', {
						args: { siteGsmOffsetDisplay },
					} ),
					render: ( { item }: { item: PHPLog } ) => getFormattedDate( item.timestamp ),
					enableHiding: false,
				},
				{
					id: 'severity',
					type: 'text',
					label: translate( 'Severity' ),
					elements: VALUES_SEVERITY.map( ( severity ) => ( { value: severity, label: severity } ) ),
					filterBy: {
						operators: [ 'isAny' as Operator ],
					},
					render: ( { item }: { item: PHPLog } ) => {
						const severity = item.severity;
						return <Badge className={ `badge--${ severity }` }>{ severity }</Badge>;
					},
					enableSorting: false,
				},
				{
					id: 'message',
					type: 'text',
					label: translate( 'Message' ),
					render: ( { item }: { item: PHPLog } ) => {
						return <span className="site-logs-table__message">{ item.message }</span>;
					},
					enableSorting: false,
				},
				{
					id: 'kind',
					type: 'text',
					label: translate( 'Group' ),
					enableSorting: false,
				},
				{
					id: 'name',
					type: 'text',
					label: translate( 'Source' ),
					render: ( { item }: { item: PHPLog } ) => {
						return <span className="site-logs-table__name">{ item.name }</span>;
					},
					enableSorting: false,
				},
				{
					id: 'file',
					type: 'text',
					label: translate( 'File' ),
					render: ( { item }: { item: PHPLog } ) => {
						return <span className="site-logs-table__file">{ item.file }</span>;
					},
					enableSorting: false,
				},
				{
					id: 'line',
					type: 'integer',
					label: translate( 'Line' ),
					render: ( { item }: { item: PHPLog } ) => formatNumber( item.line ),
					enableSorting: false,
				},
			] as Field< PHPLog | ServerLog >[];
		}

		return [
			{
				id: 'date',
				type: 'datetime',
				// translators: %(siteGsmOffsetDisplay)s will be replaced with the timezone offset of the site, e.g. GMT, GMT +1, GMT -1.
				label: translate( 'Date & time (%(siteGsmOffsetDisplay)s)', {
					args: { siteGsmOffsetDisplay },
				} ),
				render: ( { item }: { item: ServerLog } ) => getFormattedDate( item.date ),
				enableHiding: false,
			},
			{
				id: 'request_type',
				type: 'text',
				label: translate( 'Request type' ),
				elements: VALUES_REQUEST_TYPE.map( ( type ) => ( { value: type, label: type } ) ),
				filterBy: {
					operators: [ 'isAny' as Operator ],
				},
				render: ( { item }: { item: ServerLog } ) => {
					const requestType = item.request_type;
					return <Badge className={ `badge--${ requestType }` }>{ requestType }</Badge>;
				},
				enableSorting: false,
			},
			{
				id: 'status',
				type: 'text',
				label: translate( 'Status' ),
				elements: VALUES_STATUS.map( ( status ) => ( { value: status, label: status } ) ),
				filterBy: {
					operators: [ 'isAny' as Operator ],
				},
				enableSorting: false,
			},
			{
				id: 'request_url',
				type: 'text',
				label: translate( 'Request URL' ),
				render: ( { item }: { item: ServerLog } ) => {
					return <span className="site-logs-table__request-url">{ item.request_url }</span>;
				},
				enableSorting: false,
			},
			{
				id: 'body_bytes_sent',
				type: 'integer',
				label: translate( 'Body bytes sent' ),
				render: ( { item }: { item: ServerLog } ) => formatNumber( item.body_bytes_sent ),
				enableSorting: false,
			},
			{
				id: 'cached',
				type: 'text',
				label: translate( 'Cached' ),
				enableSorting: false,
				elements: VALUES_CACHED.map( ( cached ) => ( {
					value: cached,
					label: getLabelCached( cached ),
				} ) ),
				filterBy: {
					operators: [ 'isAny' as Operator ],
				},
			},
			{ id: 'http_host', type: 'text', label: translate( 'HTTP Host' ), enableSorting: false },
			{
				id: 'http_referer',
				type: 'text',
				label: translate( 'HTTP Referrer' ),
				render: ( { item }: { item: ServerLog } ) => {
					return <span className="site-logs-table__http-referer">{ item.http_referer }</span>;
				},
				enableSorting: false,
			},
			{
				id: 'http2',
				type: 'text',
				label: translate( 'HTTP/2' ),
				enableSorting: false,
			},
			{
				id: 'http_user_agent',
				type: 'text',
				label: translate( 'User Agent' ),
				enableSorting: false,
			},
			{
				id: 'http_version',
				type: 'text',
				label: translate( 'HTTP Version' ),
				enableSorting: false,
			},
			{
				id: 'http_x_forwarded_for',
				type: 'text',
				label: translate( 'X-Forwarded-For' ),
				enableSorting: false,
			},
			{
				id: 'renderer',
				type: 'text',
				label: translate( 'Renderer' ),
				elements: VALUES_RENDERER.map( ( renderer ) => ( {
					value: renderer,
					label: getLabelRenderer( renderer ),
				} ) ),
				filterBy: {
					operators: [ 'isAny' as Operator ],
				},
				enableSorting: false,
			},
			{
				id: 'request_completion',
				type: 'text',
				label: translate( 'Request Completion' ),
				enableSorting: false,
			},
			{
				id: 'request_time',
				type: 'text',
				label: translate( 'Request Time' ),
				enableSorting: false,
			},
			{
				id: 'scheme',
				type: 'text',
				label: translate( 'Scheme' ),
				enableSorting: false,
			},
			{ id: 'timestamp', type: 'integer', label: translate( 'Timestamp' ), enableSorting: false },
			{
				id: 'type',
				type: 'text',
				label: translate( 'Type' ),
				enableSorting: false,
			},
			{
				id: 'user_ip',
				type: 'text',
				label: translate( 'User IP' ),
				enableSorting: false,
			},
		] as Field< PHPLog | ServerLog >[];
	}, [ getFormattedDate, logType, siteGsmOffsetDisplay, translate ] );

	return fields;
};

export default useFields;