import React from 'react';

import * as storage from '../../util/storage';
import CountriesMap from './map';

import * as api from '../../api';
import { apiPath } from '../../util/url';
import ListReport from '../reports/list';
import * as metrics from '../reports/metrics';
import { hasGoalFilter, getFiltersByKeyPrefix } from '../../util/filters';
import ImportedQueryUnsupportedWarning from '../imported-query-unsupported-warning';
import { citiesRoute, countriesRoute, regionsRoute } from '../../router';

function Countries({ query, site, onClick, afterFetchData }) {
	function fetchData() {
		return api.get(apiPath(site, '/countries'), query, { limit: 9 })
	}

	function renderIcon(country) {
		return <span className="mr-2">{country.flag}</span>
	}

	function getFilterFor(listItem) {
		return {
			prefix: "country",
			filter: ["is", "country", [listItem['code']]],
			labels: { [listItem['code']]: listItem['name'] }
		}
	}

	function chooseMetrics() {
    return [
      metrics.createVisitors({ meta: {plot: true}}),
      hasGoalFilter(query) && metrics.createConversionRate(),
    ].filter(metric => !!metric)
  }

	return (
		<ListReport
			fetchData={fetchData}
			afterFetchData={afterFetchData}
			getFilterFor={getFilterFor}
			onClick={onClick}
			keyLabel="Country"
			metrics={chooseMetrics()}
			detailsLinkProps={{ path: countriesRoute.path, search: (search) => search }}
			renderIcon={renderIcon}
			color="bg-orange-50"
		/>
	)
}

function Regions({ query, site, onClick, afterFetchData }) {
	function fetchData() {
		return api.get(apiPath(site, '/regions'), query, { limit: 9 })
	}

	function renderIcon(region) {
		return <span className="mr-2">{region.country_flag}</span>
	}

	function getFilterFor(listItem) {
		return {
			prefix: "region",
			filter: ["is", "region", [listItem['code']]],
			labels: { [listItem['code']]: listItem['name'] }
		}
	}

	function chooseMetrics() {
    return [
      metrics.createVisitors({ meta: {plot: true}}),
      hasGoalFilter(query) && metrics.createConversionRate(),
    ].filter(metric => !!metric)
  }

	return (
		<ListReport
			fetchData={fetchData}
			afterFetchData={afterFetchData}
			getFilterFor={getFilterFor}
			onClick={onClick}
			keyLabel="Region"
			metrics={chooseMetrics()}
			detailsLinkProps={{ path: regionsRoute.path, search: (search) => search }}
			renderIcon={renderIcon}
			color="bg-orange-50"
		/>
	)
}

function Cities({ query, site, afterFetchData }) {
	function fetchData() {
		return api.get(apiPath(site, '/cities'), query, { limit: 9 })
	}

	function renderIcon(city) {
		return <span className="mr-2">{city.country_flag}</span>
	}

	function getFilterFor(listItem) {
		return {
			prefix: "city",
			filter: ["is", "city", [listItem['code']]],
			labels: { [listItem['code']]: listItem['name'] }
		}
	}

	function chooseMetrics() {
    return [
      metrics.createVisitors({ meta: {plot: true}}),
      hasGoalFilter(query) && metrics.createConversionRate(),
    ].filter(metric => !!metric)
  }

	return (
		<ListReport
			fetchData={fetchData}
			afterFetchData={afterFetchData}
			getFilterFor={getFilterFor}
			keyLabel="City"
			metrics={chooseMetrics()}
			detailsLinkProps={{ path: citiesRoute.path, search: (search) => search }}
			renderIcon={renderIcon}
			color="bg-orange-50"
		/>
	)
}


const labelFor = {
	'countries': 'Countries',
	'regions': 'Regions',
	'cities': 'Cities',
}

export default class Locations extends React.Component {
	constructor(props) {
		super(props)
		this.onCountryFilter = this.onCountryFilter.bind(this)
		this.onRegionFilter = this.onRegionFilter.bind(this)
		this.afterFetchData = this.afterFetchData.bind(this)
		this.tabKey = `geoTab__${props.site.domain}`
		const storedTab = storage.getItem(this.tabKey)
		this.state = {
			mode: storedTab || 'map',
			loading: true,
			skipImportedReason: null
		}
	}

	componentDidUpdate(prevProps, prevState) {
		const isRemovingFilter = (filterName) => {
			return getFiltersByKeyPrefix(prevProps.query, filterName).length > 0 &&
				getFiltersByKeyPrefix(this.props.query, filterName).length == 0
		}

		if (this.state.mode === 'cities' && isRemovingFilter('region')) {
			this.setMode('regions')()
		}

		if (this.state.mode === 'regions' && isRemovingFilter('country')) {
			this.setMode(this.countriesRestoreMode || 'countries')()
		}

		if (this.props.query !== prevProps.query || this.state.mode !== prevState.mode) {
			this.setState({ loading: true })
		}
	}

	setMode(mode) {
		return () => {
			storage.setItem(this.tabKey, mode)
			this.setState({ mode })
		}
	}

	onCountryFilter(mode) {
		return () => {
			this.countriesRestoreMode = mode
			this.setMode('regions')()
		}
	}

	onRegionFilter() {
		this.setMode('cities')()
	}

	afterFetchData(apiResponse) {
		this.setState({ loading: false, skipImportedReason: apiResponse.skip_imported_reason })
	}

	renderContent() {
		switch (this.state.mode) {
			case "cities":
				return <Cities site={this.props.site} query={this.props.query} afterFetchData={this.afterFetchData} />
			case "regions":
				return <Regions onClick={this.onRegionFilter} site={this.props.site} query={this.props.query} afterFetchData={this.afterFetchData} />
			case "countries":
				return <Countries onClick={this.onCountryFilter('countries')} site={this.props.site} query={this.props.query} afterFetchData={this.afterFetchData} />
			case "map":
			default:
				return <CountriesMap onClick={this.onCountryFilter('map')} site={this.props.site} query={this.props.query} afterFetchData={this.afterFetchData} />
		}
	}

	renderPill(name, mode) {
		const isActive = this.state.mode === mode

		if (isActive) {
			return (
				<button
					className="inline-block h-5 text-indigo-700 dark:text-indigo-500 font-bold active-prop-heading"
				>
					{name}
				</button>
			)
		}

		return (
			<button
				className="hover:text-indigo-600 cursor-pointer"
				onClick={this.setMode(mode)}
			>
				{name}
			</button>
		)
	}

	render() {
		return (
			<div>
				<div className="w-full flex justify-between">
					<div className="flex gap-x-1">
						<h3 className="font-bold dark:text-gray-100">
							{labelFor[this.state.mode] || 'Locations'}
						</h3>
						<ImportedQueryUnsupportedWarning loading={this.state.loading} skipImportedReason={this.state.skipImportedReason} />
					</div>
					<div className="flex text-xs font-medium text-gray-500 dark:text-gray-400 space-x-2">
						{this.renderPill('Map', 'map')}
						{this.renderPill('Countries', 'countries')}
						{this.renderPill('Regions', 'regions')}
						{this.renderPill('Cities', 'cities')}
					</div>
				</div>
				{this.renderContent()}
			</div>
		)
	}
}