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

const maxStrLen = 512;

/**
 * Displays pretty JSON value.
 *
 * @property {*} value The value
 */
export default class Controller extends Component {
    get value() {
        return this._value;
    }

    set value(value) {
        const wasEmpty = this._value === undefined;
        this._value = value;

        let text;
        let cssClass;
        const type = typeof value;

        if (value == null) {
            text = '∅';
            cssClass = 'null';
        } else {
            cssClass = type;
            switch (type) {
            case 'number':
                if (Number.isInteger(value))
                    text = value;
                else
                    text = Math.round((value + Number.EPSILON) * 1000) / 1000;
                break;
            case 'boolean':
                text = value ? '✓' : '✗';
                cssClass = value ? 'true' : 'false';
                break;
            case 'string':
                text = value.length <= maxStrLen
                    ? value
                    : value.substring(0, maxStrLen) + '...';
                break;
            case 'object':
                if (value instanceof Date) {
                    const hasZeroTime =
                        value.getHours() === 0 &&
                        value.getMinutes() === 0 &&
                        value.getSeconds() === 0;
                    const format = hasZeroTime ? 'dd/MM/yyyy' : 'dd/MM/yyyy HH:mm:ss';
                    text = this.$filter('date')(value, format);
                } else
                    text = value;
                break;
            default:
                text = value;
            }
        }

        const el = this.element;
        el.textContent = text;
        el.title = type == 'string' && value.length > maxStrLen ? value : '';

        cssClass = `json-${cssClass}`;
        if (wasEmpty)
            el.classList.add(cssClass);
        else
            el.classList.replace(this.className, cssClass);
    }
}

ngModule.vnComponent('vnJsonValue', {
    controller: Controller,
    bindings: {
        value: '<?'
    }
});