import { LightningElement, api } from "lwc";

export default class RelativeDateTime extends LightningElement {
    @api
    set value(value) {
        if (!value) {
            console.error("Value provided to RelativeDateTime is invalid");
            return;
        }

        this._inputDateTime = new Date(value);
    }
    get value() {
        this._relativeDateTime = this.getFormattedDateTime(
            this._inputDateTime!
        );
        return this._relativeDateTime;
    }
    get original() {
        return this._inputDateTime?.toLocaleString();
    }

    private _inputDateTime?: Date;
    private _relativeDateTime?: string;

    getFormattedDateTime(inputDateTime: Date) {
        const now = new Date();
        const yesterday = new Date(
            now.getTime() - 24 * 60 * 60 * 1000
        ).toLocaleDateString();
        const twoDaysAgo = new Date(
            now.getTime() - 48 * 60 * 60 * 1000
        ).toLocaleDateString();
        const dateStringFromInput = inputDateTime?.toLocaleDateString();
        if (dateStringFromInput === yesterday) {
            return "1 day ago";
        } else if (dateStringFromInput === twoDaysAgo) {
            return "2 days ago";
        }
        return dateStringFromInput;
    }
}