import ngModule from '../../module';
import Component from '../../lib/component';
import './style.scss';

export default class SmartTable extends Component {
    constructor($element, $, $transclude) {
        super($element, $);
        this.$transclude = $transclude;
        this.sortCriteria = [];
        this.autoSave = false;
    }

    get model() {
        return this._model;
    }

    set model(value) {
        this._model = value;
        if (value) {
            this.$.model = value;
            this.transclude();
        }
    }

    get checkedRows() {
        const model = this.model;
        if (model && model.data)
            return model.data.filter(row => row.$checked);

        return null;
    }

    registerColumns() {
        const header = this.element.querySelector('thead > tr');
        if (!header) return;
        const columns = header.querySelectorAll('th');

        // Click handler
        for (let column of columns) {
            const field = column.getAttribute('field');
            if (field)
                column.addEventListener('click', () => this.orderHandler(column));
        }
    }

    // Creo que se puede hacer directamente desde ng-transclude
    transclude() {
        const slotTable = this.element.querySelector('#table');
        this.$transclude(($clone, $scope) => {
            const table = $clone[0];
            $scope.hasChanges = this.hasChanges;
            slotTable.appendChild(table);
            this.registerColumns();
        }, null, 'table');
    }

    orderHandler(element) {
        const field = element.getAttribute('field');
        const existingCriteria = this.sortCriteria.find(criteria => {
            return criteria.field == field;
        });

        if (!existingCriteria) {
            this.sortCriteria.push({field: field, sortType: 'ASC'});
            element.classList.remove('desc');
            element.classList.add('asc');
        }

        if (existingCriteria && existingCriteria.sortType == 'DESC') {
            this.sortCriteria.splice(this.sortCriteria.findIndex(criteria => {
                return criteria.field == field;
            }), 1);
            element.classList.remove('desc');
            element.classList.remove('asc');
        }
        if (existingCriteria && existingCriteria.sortType == 'ASC') {
            existingCriteria.sortType = 'DESC';
            element.classList.remove('asc');
            element.classList.add('desc');
        }

        this.applySort();
    }

    applySort() {
        let order = this.sortCriteria.map(criteria => `${criteria.field} ${criteria.sortType}`);
        order = order.join(', ');

        if (order)
            this.model.order = order;

        this.model.refresh();
    }

    createRow() {
        this.model.insert({
            nickname: 'New row'
        });
    }

    deleteAll() {
        const rowsChecked = this.checkedRows();
        for (let row of rowsChecked)
            this.model.removeRow(row);

        if (this.autoSave)
            this.saveAll();
    }

    saveAll() {
        const model = this.model;

        if (!model.isChanged)
            return this.vnApp.showError(this.$t('No changes to save'));

        this.model.save()
            .then(() => this.vnApp.showSuccess(this.$t('Data saved!')));
    }

    hasChanges() {
        return true;
    }
}

SmartTable.$inject = ['$element', '$scope', '$transclude'];

ngModule.vnComponent('smartTable', {
    template: require('./index.html'),
    controller: SmartTable,
    transclude: {
        table: '?slotTable',
        actions: '?slotActions'
    },
    bindings: {
        model: '<?',
        autoSave: '<?'
    }
});