import { formatDistanceToNow, parseJSON, format, parse } from "date-fns";

export function friendlyDate(date) {
  return formatDistanceToNow(parseJSON(date), { addSuffix: true });
}

export function readableDate(date) {
  if (!date) {
    return "";
  }
  return format(parseJSON(date), "dd MMM yyyy");
}

export function readableDatetime(date) {
  if (!date) {
    return "";
  }

  return format(parseJSON(date), "dd MMM yyyy HH:mm");
}

export function stripHtml(html = "") {
  let tmp = document.createElement("div");
  tmp.innerHTML = html;
  return tmp.textContent || tmp.innerText || "";
}

export function randomId(length = 10) {
  return Math.random()
    .toString(36)
    .substring(2, length + 2);
}

export function clickOutside(node) {
  const handleClick = (event) => {
    if (node && !node.contains(event.target) && !event.defaultPrevented) {
      node.dispatchEvent(new CustomEvent("click_outside", node));
    }
  };

  document.addEventListener("click", handleClick, true);

  return {
    destroy() {
      document.removeEventListener("click", handleClick, true);
    },
  };
}

export function arrayUnique(array) {
  return array.filter((value, index) => array.indexOf(value) === index);
}

export function arrayUniqueBy(items, uniqueBy) {
  const ids = new Set(items.map((item) => item[uniqueBy]));
  return [...ids].map((id) => items.find((i) => i[uniqueBy] === id));
}

export function arrayMoveElement(array, from, to) {
  if (from === to) {
    return array;
  }

  const item = array.find((v, i) => i === from);
  const arrayWithout = array.filter((v, i) => i !== from);
  if (from > to) {
    return arrayWithout.reduce((c, v, i) => {
      if (i === to) {
        return [...c, item, v];
      }
      return [...c, v];
    }, []);
  }

  return arrayWithout.reduce((c, v, i) => {
    if (i + 1 === to) {
      return [...c, v, item];
    }
    return [...c, v];
  }, []);
}

export function isEqual(db, ed) {
  let isObject = (x) =>
    typeof x === "object" && !Array.isArray(x) && x !== null;
  let isArray = (x) => x?.constructor === Array;
  let isEmpty = (x) => x === null || x === undefined || x == [];
  const db_value = db ?? null;
  const ed_value = ed ?? null;

  if (isObject(db_value)) {
    let keys = Object.keys(db_value);
    return keys.reduce((acc, k) => {
      if (acc === false) {
        return false;
      }
      return isEqual(db_value?.[k], ed_value?.[k]);
    }, true);
  }
  if (isArray(db_value)) {
    return db_value.reduce((c, v, i) => {
      if (c === false) {
        return false;
      }
      return isEqual(v, ed_value?.[i]);
    }, true);
  }

  if (isEmpty(db_value) && isEmpty(ed_value)) {
    return true;
  }

  if (db_value == ed_value) {
    return true;
  }

  return false;

  // const ok = Object.keys,
  //     tx = typeof x,
  //     ty = typeof y;
  // return x && y && tx === "object" && tx === ty
  //     ? ok(x).length === ok(y).length &&
  //           ok(x).every((key) => isEqual(x[key], y[key]))
  //     : x === y;
}