import { tap } from 'rxjs/operators';
import { ITrackable } from '../listing/models/trackable';
import { MonoTypeOperatorFunction } from 'rxjs';
import moment from 'moment';
import { FormGroup } from '@angular/forms';

export function capitalize(value: string): string {
    if (!value) {
        return '';
    }
    return value.charAt(0).toUpperCase() + value.slice(1);
}

export function humanize(value: string, lowercase = true): string {
    if (!value) {
        return '';
    }

    const words = (lowercase ? value.toLowerCase() : value).split(/[ \-_]+/);
    return words.map(capitalize).join(' ');
}

export function log<T>(): MonoTypeOperatorFunction<T> {
    return tap<T>(res => console.log(`%c[${moment().format('HH:mm:ss.SSS')}]`, 'color: yellow;', res));
}

export function toNumber(str: string): number {
    try {
        return parseInt(`${str}`.replace(/\D/g, ''), 10);
    } catch (e) {
        return 0;
    }
}

export function trackByFactory<T extends ITrackable>() {
    return (index: number, item: T): string => item.id;
}

export function hasFormChanged(form: FormGroup, initialFormValue): boolean {

    if (form && initialFormValue) {
        for (const key of Object.keys(form.getRawValue())) {
            const initialValue = initialFormValue[key];
            const updatedValue = form.get(key).value;

            if (initialValue == null && updatedValue != null) {
                const updatedValueType = typeof updatedValue;
                if (updatedValueType !== 'string' && updatedValueType !== 'boolean') {
                    return true;
                } else if (updatedValueType === 'string' && updatedValue.length > 0) {
                    return true;
                } else if (updatedValueType === 'boolean' && updatedValue === true) {
                    return true;
                }
            } else if (initialValue !== updatedValue) {
                if (Array.isArray(updatedValue)) {
                    if (JSON.stringify(initialValue) !== JSON.stringify(updatedValue)) {
                        return true;
                    }
                } else if (updatedValue instanceof moment) {
                    if (!moment(updatedValue).isSame(moment(initialValue))) {
                        return true;
                    }
                } else {
                    return true;
                }
            }
        }
    }
    return false;
}