import {DateTime} from 'luxon';
import {createStructuredSelector} from 'reselect';

import {link} from 'ui/lib/d3-redux';
import {drawLoadingIndicator} from 'd3render/loading-indicator';

// required to make the USWDS component JS available to init after page load
import components from '../../../../../node_modules/uswds/src/js/components';

import {
    isLoadingTS,
    hasAnyTimeSeries,
    getUserInputsForSelectingTimespan,
    getCustomTimeRange,
    getCurrentParmCd
} from 'ml/selectors/time-series-selector';
import {getIanaTimeZone} from 'ml/selectors/time-zone-selector';
import {Actions as ivTimeSeriesDataActions} from 'ml/store/instantaneous-value-time-series-data';
import {Actions as ivTimeSeriesStateActions} from 'ml/store/instantaneous-value-time-series-state';
import {MAX_DIGITS_FOR_DAYS_FROM_TODAY} from 'ivhydrograph/hydrograph-utils';

export const drawDateRangeControls = function(elem, store, siteno) {
    const DATE_RANGE = [{
        name: '7 days',
        period: 'P7D'
    }, {
        name: '30 days',
        period: 'P30D'
    }, {
        name: '1 year',
        period: 'P1Y'
    }, {
        name: 'Custom',
        period: 'custom',
        ariaExpanded: false
    }];
    const CUSTOM_TIMEFRAME_RADIO_BUTTON_DETAILS = [
        {
            id: 'custom-input-days-before-today',
            value: 'days',
            text: 'Days before today',
            checked: true,
            ariaExpanded: false
        },
        {
            id: 'custom-input-calender-days',
            value: 'calender',
            text: 'Calender days',
            checked: false,
            ariaExpanded: false
        }
    ];

    const containerRadioGroupMainSelectButtons = elem.insert('div', ':nth-child(2)')
        .attr('id', 'ts-daterange-select-container')
        .attr('role', 'radiogroup')
        .attr('aria-label', 'Time interval select')
        .call(link(store,function(container, showControls) {
            container.attr('hidden', showControls ? null : true);
        }, hasAnyTimeSeries));

    // Add a container that holds the custom selection radio buttons and the form fields
    const containerRadioGroupAndFormButtons = elem.insert('div', ':nth-child(3)')
        .attr('class', 'container-radio-group-and-form-buttons')
        .call(link(store, (container, userInputsForSelectingTimespan) => {
            container.attr('hidden', userInputsForSelectingTimespan.mainTimeRangeSelectionButton === 'custom' ? null : true);
        }, getUserInputsForSelectingTimespan));

    const containerRadioGroupCustomSelectButtons = containerRadioGroupAndFormButtons.append('div')
        .attr('id', 'ts-custom-date-radio-group')
        .attr('role', 'radiogroup')
        .attr('aria-label', 'Custom time interval select');

    const containerCustomDaysBeforeToday = containerRadioGroupAndFormButtons.append('div')
        .attr('id', 'ts-custom-days-before-today-select-container')
        .attr('class', 'usa-form')
        .attr('aria-label', 'Custom date by days before today specification')
    .call(link(store, (container, userInputsForSelectingTimespan) => {
        container.attr('hidden', userInputsForSelectingTimespan.customTimeRangeSelectionButton === 'days-input' && userInputsForSelectingTimespan.mainTimeRangeSelectionButton === 'custom' ? null : true);
    }, getUserInputsForSelectingTimespan));

    const containerCustomCalenderDays = containerRadioGroupAndFormButtons.append('div')
        .attr('id', 'ts-customdaterange-select-container')
        .attr('role', 'customdate')
        .attr('class', 'usa-form')
        .attr('aria-label', 'Custom date specification')
        .call(link(store, (container, userInputsForSelectingTimespan) => {
            container.attr('hidden', userInputsForSelectingTimespan.customTimeRangeSelectionButton === 'calender-input' && userInputsForSelectingTimespan.mainTimeRangeSelectionButton === 'custom' ? null : true);
        }, getUserInputsForSelectingTimespan));

    const createRadioButtonsForCustomDaterangeSelection = function(containerRadioGroupCustomSelectButtons) {
        containerRadioGroupCustomSelectButtons.append('p').text('Enter timespan using');
        const listContainerForCustomSelectRadioButtons = containerRadioGroupCustomSelectButtons.append('ul')
            .attr('class', 'usa-fieldset usa-list--unstyled');
        const listItemForCustomSelectRadioButtons  = listContainerForCustomSelectRadioButtons.selectAll('li')
            .attr('class', 'usa-fieldset')
            .data(CUSTOM_TIMEFRAME_RADIO_BUTTON_DETAILS)
            .enter()
            .append('li');
        listItemForCustomSelectRadioButtons.append('input')
            .attr('type', 'radio')
            .attr('name', 'ts-custom-daterange-input')
            .attr('id', d => `${d.value}-input`)
            .attr('class', 'usa-radio__input')
            .attr('value', d => d.value)
            .property('checked', d => d.checked)
            .attr('ga-on', 'click')
            .attr('aria-expanded', d => d.ariaExpanded)
            .attr('ga-event-category', 'TimeSeriesGraph')
            .attr('ga-event-action', d => `changeDateRangeWith${d.value}`)
            .on('change', function() {
                const selected = listItemForCustomSelectRadioButtons.select('input:checked');
                const selectedVal = selected.attr('id');
                store.dispatch(ivTimeSeriesStateActions.setUserInputsForSelectingTimespan('customTimeRangeSelectionButton', selectedVal));
            });
        listItemForCustomSelectRadioButtons.append('label')
            .attr('class', 'usa-radio__label')
            .attr('for', (d) => `${d.value}-input`)
            .text((d) => d.text);
        listItemForCustomSelectRadioButtons.call(link(store, (elem, userInputsForSelectingTimespan) => {
            store.dispatch(ivTimeSeriesStateActions.setCustomIVTimeRange(null));
            elem.select(`#${userInputsForSelectingTimespan.customTimeRangeSelectionButton}`).property('checked', true);
        }, getUserInputsForSelectingTimespan));
    };

    const createControlsForSelectingTimeSpanInDaysFromToday = function() {
        const numberOfDaysSelection = containerCustomDaysBeforeToday.append('div')
            .attr('class', 'usa-character-count')
            .append('div')
            .attr('class', 'usa-form-group');
        numberOfDaysSelection.append('label')
            .attr('class', 'usa-label')
            .attr('for', 'with-hint-input-days-from-today' )
            .text('Days');
        numberOfDaysSelection.append('span')
            .attr('id', 'with-hint-input-days-from-today-hint')
            .attr('class', 'usa-hint')
            .text('Timespan in days before today');
        numberOfDaysSelection.append('input')
            .attr('class', 'usa-input usa-character-count__field')
            .attr('id', 'with-hint-input-days-from-today')
            .attr('maxlength', `${MAX_DIGITS_FOR_DAYS_FROM_TODAY}`)
            .attr('name', 'with-hint-input-days-from-today')
            .attr('aria-describedby', 'with-hint-input-days-from-today-info with-hint-input-days-from-today-hint');
        numberOfDaysSelection.append('span')
            .text(`${MAX_DIGITS_FOR_DAYS_FROM_TODAY} digits allowed`)
            .attr('id', 'with-hint-input-days-from-today-info')
            .attr('class', 'usa-hint usa-character-count__message')
            .attr('aria-live', 'polite');
        // Create a validation alert for user selection of number of days before today
        const customDaysBeforeTodayValidationContainer = containerCustomDaysBeforeToday.append('div')
            .attr('class', 'usa-alert usa-alert--warning usa-alert--validation')
            .attr('id', 'custom-days-before-today-alert-container')
            .attr('hidden', true);
        const customDaysBeforeTodayAlertBody = customDaysBeforeTodayValidationContainer.append('div')
            .attr('class', 'usa-alert__body')
            .attr('id', 'custom-days-before-today-alert');
        customDaysBeforeTodayAlertBody.append('h3')
            .attr('class', 'usa-alert__heading')
            .text('Requirements');
        numberOfDaysSelection.call(link(store, (container, userInputsForSelectingTimespan) => {
            if (userInputsForSelectingTimespan.mainTimeRangeSelectionButton === 'custom' && userInputsForSelectingTimespan.customTimeRangeSelectionButton === 'days-input') {
                container.select('#with-hint-input-days-from-today')
                    .property('value', userInputsForSelectingTimespan.numberOfDaysFieldValue);
            }
        }, getUserInputsForSelectingTimespan));
        // Adds controls for the 'days before today' submit button
        const daysBeforeTodaySubmitContainer = containerCustomDaysBeforeToday.append('div')
            .attr('class', 'submit-button');
        daysBeforeTodaySubmitContainer.append('button')
            .attr('class', 'usa-button')
            .attr('id', 'custom-date-submit-days')
            .text('Display data on graph')
            .on('click', function() {
                const userSpecifiedNumberOfDays = document.getElementById('with-hint-input-days-from-today').value;
                const formattedPeriodQueryParameter = `P${parseInt(userSpecifiedNumberOfDays)}D`;
                // Validate user input for things not a number and blank entries
                if (isNaN(userSpecifiedNumberOfDays) || userSpecifiedNumberOfDays.length === 0) {
                    customDaysBeforeTodayAlertBody.selectAll('p').remove();
                    customDaysBeforeTodayAlertBody.append('p')
                        .text('Entry must be a number.');
                    customDaysBeforeTodayValidationContainer.attr('hidden', null);
                } else {
                    customDaysBeforeTodayValidationContainer.attr('hidden', true);
                    const parameterCode = getCurrentParmCd(store.getState());

                    store.dispatch(ivTimeSeriesStateActions.setUserInputsForSelectingTimespan('numberOfDaysFieldValue', userSpecifiedNumberOfDays));
                    store.dispatch(ivTimeSeriesDataActions.retrieveCustomTimePeriodIVTimeSeries(
                        siteno,
                        parameterCode,
                        formattedPeriodQueryParameter
                    )).then(() => store.dispatch(ivTimeSeriesStateActions.clearIVGraphBrushOffset()));
                }
            });
    };

    const createControlsForDateRangePicker = function() {
        const dateRangePicker = containerCustomCalenderDays.append('div')
            .attr('class', 'usa-date-range-picker');

        const customDateValidationContainer = containerCustomCalenderDays.append('div')
            .attr('class', 'usa-alert usa-alert--warning usa-alert--validation')
            .attr('id', 'custom-date-alert-container')
            .attr('hidden', true);

        const dateAlertBody = customDateValidationContainer.append('div')
            .attr('class', 'usa-alert__body')
            .attr('id', 'custom-date-alert');

        dateAlertBody.append('h3')
            .attr('class', 'usa-alert__heading')
            .text('Date requirements');

        const startDateFormGroup = dateRangePicker.append('div')
            .attr('id', 'start-date-form-group')
            .attr('class', 'usa-form-group');

        const endDateFormGroup = dateRangePicker.append('div')
            .attr('id', 'end-date-form-group')
            .attr('class', 'usa-form-group');

        startDateFormGroup.append('label')
            .attr('class', 'usa-label')
            .attr('id', 'custom-start-date-label')
            .attr('for', 'custom-start-date')
            .text('Start Date');

        startDateFormGroup.append('div')
            .attr('class', 'usa-hint')
            .attr('id', 'custom-start-date-hint')
            .text('mm/dd/yyyy')
            .append('div')
                .attr('class', 'usa-date-picker')
                .attr('data-min-date', '1900-01-01')
                .attr('data-max-date', '2100-12-31')
            .append('input')
                .attr('class', 'usa-input')
                .attr('id', 'custom-start-date')
                .attr('name', 'custom-start-date')
                .attr('aria-describedby', 'custom-start-date-label custom-start-date-hint')
                .attr('type', 'text');

        endDateFormGroup.append('label')
            .attr('class', 'usa-label')
            .attr('id', 'custom-end-date-label')
            .attr('for', 'custom-end-date')
            .text('End Date');

        endDateFormGroup.append('div')
            .attr('class', 'usa-hint')
            .attr('id', 'custom-end-date-hint')
            .text('mm/dd/yyyy')
            .append('div')
            .attr('class', 'usa-date-picker')
            .attr('data-min-date', '1900-01-01')
            .attr('data-max-date', '2100-12-31')
            .append('input')
            .attr('class', 'usa-input')
            .attr('id', 'custom-end-date')
            .attr('name', 'custom-end-date')
            .attr('type', 'text')
            .attr('aria-describedby', 'custom-end-date-label custom-end-date-hint');

        // required to init the USWDS date picker after page load
        components.datePicker.init(elem.node());
        // required to init the USWDS date range picker after page load
        components.dateRangePicker.init(elem.node());

        // Adds controls for the calender day submit button
        const calenderDaysSubmitContainer = containerCustomCalenderDays.append('div')
            .attr('class', 'submit-button');

        calenderDaysSubmitContainer.append('button')
            .attr('class', 'usa-button')
            .attr('id', 'custom-date-submit-calender')
            .text('Display data on graph')
            .on('click', function() {
                let userSpecifiedStart = document.getElementById('custom-start-date').value;
                let userSpecifiedEnd = document.getElementById('custom-end-date').value;
                if (userSpecifiedStart.length === 0 || userSpecifiedEnd.length === 0) {
                    dateAlertBody.selectAll('p').remove();
                    dateAlertBody.append('p')
                        .text('Both start and end dates must be specified.');
                    customDateValidationContainer.attr('hidden', null);
                } else if (DateTime.fromFormat(userSpecifiedEnd, 'LL/dd/yyyy') < DateTime.fromFormat(userSpecifiedStart, 'LL/dd/yyyy')) {
                    dateAlertBody.selectAll('p').remove();
                    dateAlertBody.append('p')
                        .text('The start date must precede the end date.');
                    customDateValidationContainer.attr('hidden', null);
                } else {
                    customDateValidationContainer.attr('hidden', true);
                    userSpecifiedStart = DateTime.fromFormat(userSpecifiedStart, 'LL/dd/yyyy').toISODate();
                    userSpecifiedEnd = DateTime.fromFormat(userSpecifiedEnd, 'LL/dd/yyyy').toISODate();
                    store.dispatch(ivTimeSeriesDataActions.retrieveUserRequestedIVDataForDateRange(
                        siteno,
                        userSpecifiedStart,
                        userSpecifiedEnd
                    )).then(() => store.dispatch(ivTimeSeriesStateActions.clearIVGraphBrushOffset()));
                }
            });

        containerCustomCalenderDays.call(link(store, (container, {customTimeRange, ianaTimeZone}) => {
            container.select('#custom-start-date')
                .property('value', customTimeRange && customTimeRange.start ? DateTime.fromMillis(customTimeRange.start, {zone: ianaTimeZone}).startOf('day').toFormat('LL/dd/yyyy') : '');
            container.select('#custom-end-date')
                .property('value', customTimeRange && customTimeRange.end ? DateTime.fromMillis(customTimeRange.end, {zone: ianaTimeZone}).toFormat('LL/dd/yyyy') : '');
        }, createStructuredSelector({
            customTimeRange: getCustomTimeRange,
            ianaTimeZone: getIanaTimeZone
        })));
    };

    const createRadioButtonsForPrimaryTimeframes = function() {
        const listContainer = containerRadioGroupMainSelectButtons.append('ul')
            .attr('class', 'usa-fieldset usa-list--unstyled');
        const li = listContainer.selectAll('li')
            .attr('class', 'usa-fieldset')
            .data(DATE_RANGE)
            .enter().append('li');
        listContainer.call(link(store, drawLoadingIndicator, createStructuredSelector({
            showLoadingIndicator: isLoadingTS('current'),
            sizeClass: () => 'fa-lg'
        })));

        li.append('input')
            .attr('type', 'radio')
            .attr('name', 'ts-daterange-input')
            .attr('id', d => `${d.period}-input`)
            .attr('class', 'usa-radio__input')
            .attr('value', d => d.period)
            .attr('ga-on', 'click')
            .attr('aria-expanded', d => d.ariaExpanded)
            .attr('ga-event-category', 'TimeSeriesGraph')
            .attr('ga-event-action', d => `changeDateRangeTo${d.period}`)
            .on('change', function() {
                const selected = li.select('input:checked');
                const selectedVal = selected.attr('value');

                // Remove any values stored in the form, because they may not match what is shown in the graph until the submit button is pushed
                store.dispatch(ivTimeSeriesStateActions.setUserInputsForSelectingTimespan('numberOfDaysFieldValue', ''));
                store.dispatch(ivTimeSeriesStateActions.setCustomIVTimeRange(null));

                if (selectedVal === 'custom') {
                    selected.attr('aria-expanded', true);
                    containerRadioGroupCustomSelectButtons.attr('hidden', null);
                    containerCustomDaysBeforeToday.attr('hidden', null);
                    containerCustomCalenderDays.attr('hidden', true);
                    store.dispatch(ivTimeSeriesStateActions.setUserInputsForSelectingTimespan('mainTimeRangeSelectionButton', 'custom'));
                } else {
                    const userInputTimeframeButtonSelected = li.select('input:checked').attr('value');

                    li.select('input#custom-date-range').attr('aria-expanded', false);
                    containerRadioGroupCustomSelectButtons.attr('hidden', true);
                    containerCustomDaysBeforeToday.attr('hidden', true);
                    containerCustomCalenderDays.attr('hidden', true);
                    store.dispatch(ivTimeSeriesStateActions.setUserInputsForSelectingTimespan('mainTimeRangeSelectionButton', userInputTimeframeButtonSelected));
                    store.dispatch(ivTimeSeriesDataActions.retrieveExtendedIVTimeSeries(
                        siteno,
                        userInputTimeframeButtonSelected
                    )).then(() => {
                        store.dispatch(ivTimeSeriesStateActions.clearIVGraphBrushOffset());
                    });
                }
            });

        li.append('label')
            .attr('class', 'usa-radio__label')
            .attr('for', (d) => `${d.period}-input`)
            .text((d) => d.name);
        li.call(link(store, (elem, userInputsForSelectingTimespan) => {
            store.dispatch(ivTimeSeriesStateActions.setCustomIVTimeRange(null));
            elem.select(`#${userInputsForSelectingTimespan.mainTimeRangeSelectionButton}-input`).property('checked', true);
        }, getUserInputsForSelectingTimespan));
    };


    createRadioButtonsForCustomDaterangeSelection(containerRadioGroupCustomSelectButtons);
    createControlsForSelectingTimeSpanInDaysFromToday();
    createControlsForDateRangePicker();
    createRadioButtonsForPrimaryTimeframes();
};