import ngModule from '../../module';
import Component from '../../lib/component';
import {Flatpickr} from '../../vendor';
import './style.scss';

class DatePicker extends Component {
    constructor($element, $scope, $translate, $attrs) {
        super($element, $scope);
        this.input = $element[0].querySelector('input');
        this.$translate = $translate;
        this.$attrs = $attrs;
        this._model = undefined;
        this.dateValue = undefined;
        this.hasMouseIn = false;
        let locale = this.$translate.use();
        this.defaultOptions = {
            locale: locale,
            dateFormat: locale == 'es' ? 'd-m-Y' : 'Y-m-d',
            enableTime: false,
            onValueUpdate: () => this.onValueUpdate()
        };
        this.userOptions = {};
        this._iniOptions = this.defaultOptions;
        componentHandler.upgradeElement($element[0].firstChild);
        this.vp = new Flatpickr(this.input, this._iniOptions);
    }

    onValueUpdate() {
        if (this.vp.selectedDates.length) {
            let date = this.vp.selectedDates[0];
            let offset = date.getTimezoneOffset() * 60000;
            date.setTime(date.getTime() - offset);
            this._model = date;
        } else
            this.model = null;
        this.$.$apply();
    }

    set iniOptions(value) {
        this.userOptions = value;
        let options = Object.assign({}, this.defaultOptions, value);
        this._iniOptions = options;

        // TODO: When some properties change Flatpickr doesn't refresh the view
        // for (let option in options)
        //    this.vp.set(option, options[option]);

        if (this.vp) this.vp.destroy();
        this.vp = new Flatpickr(this.input, this._iniOptions);
        this.vp.setDate(this.dateValue);
        this.mdlUpdate();
    }

    get iniOptions() {
        return this.userOptions;
    }

    get model() {
        return this._model;
    }

    set model(value) {
        this._model = value;
        this.dateValue = value;
        let date;
        if (value && this.iniOptions.enableTime) {
            date = new Date(value);
            let offset = date.getTimezoneOffset() * 60000;
            date.setTime(date.getTime() + offset);
        } else
            date = value;

        this.vp.setDate(date);
        this.mdlUpdate();
    }

    onClear() {
        this.model = null;
    }

    mdlUpdate() {
        let mdlField = this.element.firstChild.MaterialTextfield;
        if (mdlField)
            mdlField.updateClasses_();
    }

    $onDestroy() {
        this.vp.destroy();
        this.dateValue = undefined;
    }
}
DatePicker.$inject = ['$element', '$scope', '$translate', '$attrs'];

ngModule.component('vnDatePicker', {
    template: require('./date-picker.html'),
    bindings: {
        iniOptions: '<?',
        model: '=',
        label: '@?',
        name: '@?',
        disabled: '<?',
        rule: '<?',
        isLocale: '<?'
    },
    controller: DatePicker
});