'use strict';

const defaults = Object.freeze({
  ignoreUnknown: false,
  respectType: false,
  respectFunctionNames: false,
  respectFunctionProperties: false,
  unorderedObjects: true,
  unorderedArrays: false,
  unorderedSets: false,
  excludeKeys: void 0,
  excludeValues: void 0,
  replacer: void 0
});
function objectHash(object, options) {
  if (options) {
    options = { ...defaults, ...options };
  } else {
    options = defaults;
  }
  const hasher = createHasher(options);
  hasher.dispatch(object);
  return hasher.toString();
}
const defaultPrototypesKeys = Object.freeze([
  "prototype",
  "__proto__",
  "constructor"
]);
function createHasher(options) {
  let buff = "";
  let context = /* @__PURE__ */ new Map();
  const write = (str) => {
    buff += str;
  };
  return {
    toString() {
      return buff;
    },
    getContext() {
      return context;
    },
    dispatch(value) {
      if (options.replacer) {
        value = options.replacer(value);
      }
      const type = value === null ? "null" : typeof value;
      return this[type](value);
    },
    object(object) {
      if (object && typeof object.toJSON === "function") {
        return this.object(object.toJSON());
      }
      const objString = Object.prototype.toString.call(object);
      let objType = "";
      const objectLength = objString.length;
      if (objectLength < 10) {
        objType = "unknown:[" + objString + "]";
      } else {
        objType = objString.slice(8, objectLength - 1);
      }
      objType = objType.toLowerCase();
      let objectNumber = null;
      if ((objectNumber = context.get(object)) === void 0) {
        context.set(object, context.size);
      } else {
        return this.dispatch("[CIRCULAR:" + objectNumber + "]");
      }
      if (typeof Buffer !== "undefined" && Buffer.isBuffer && Buffer.isBuffer(object)) {
        write("buffer:");
        return write(object.toString("utf8"));
      }
      if (objType !== "object" && objType !== "function" && objType !== "asyncfunction") {
        if (this[objType]) {
          this[objType](object);
        } else if (!options.ignoreUnknown) {
          this.unkown(object, objType);
        }
      } else {
        let keys = Object.keys(object);
        if (options.unorderedObjects) {
          keys = keys.sort();
        }
        let extraKeys = [];
        if (options.respectType !== false && !isNativeFunction(object)) {
          extraKeys = defaultPrototypesKeys;
        }
        if (options.excludeKeys) {
          keys = keys.filter((key) => {
            return !options.excludeKeys(key);
          });
          extraKeys = extraKeys.filter((key) => {
            return !options.excludeKeys(key);
          });
        }
        write("object:" + (keys.length + extraKeys.length) + ":");
        const dispatchForKey = (key) => {
          this.dispatch(key);
          write(":");
          if (!options.excludeValues) {
            this.dispatch(object[key]);
          }
          write(",");
        };
        for (const key of keys) {
          dispatchForKey(key);
        }
        for (const key of extraKeys) {
          dispatchForKey(key);
        }
      }
    },
    array(arr, unordered) {
      unordered = unordered === void 0 ? options.unorderedArrays !== false : unordered;
      write("array:" + arr.length + ":");
      if (!unordered || arr.length <= 1) {
        for (const entry of arr) {
          this.dispatch(entry);
        }
        return;
      }
      const contextAdditions = /* @__PURE__ */ new Map();
      const entries = arr.map((entry) => {
        const hasher = createHasher(options);
        hasher.dispatch(entry);
        for (const [key, value] of hasher.getContext()) {
          contextAdditions.set(key, value);
        }
        return hasher.toString();
      });
      context = contextAdditions;
      entries.sort();
      return this.array(entries, false);
    },
    date(date) {
      return write("date:" + date.toJSON());
    },
    symbol(sym) {
      return write("symbol:" + sym.toString());
    },
    unkown(value, type) {
      write(type);
      if (!value) {
        return;
      }
      write(":");
      if (value && typeof value.entries === "function") {
        return this.array(
          Array.from(value.entries()),
          true
          /* ordered */
        );
      }
    },
    error(err) {
      return write("error:" + err.toString());
    },
    boolean(bool) {
      return write("bool:" + bool);
    },
    string(string) {
      write("string:" + string.length + ":");
      write(string);
    },
    function(fn) {
      write("fn:");
      if (isNativeFunction(fn)) {
        this.dispatch("[native]");
      } else {
        this.dispatch(fn.toString());
      }
      if (options.respectFunctionNames !== false) {
        this.dispatch("function-name:" + String(fn.name));
      }
      if (options.respectFunctionProperties) {
        this.object(fn);
      }
    },
    number(number) {
      return write("number:" + number);
    },
    xml(xml) {
      return write("xml:" + xml.toString());
    },
    null() {
      return write("Null");
    },
    undefined() {
      return write("Undefined");
    },
    regexp(regex) {
      return write("regex:" + regex.toString());
    },
    uint8array(arr) {
      write("uint8array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    uint8clampedarray(arr) {
      write("uint8clampedarray:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    int8array(arr) {
      write("int8array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    uint16array(arr) {
      write("uint16array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    int16array(arr) {
      write("int16array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    uint32array(arr) {
      write("uint32array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    int32array(arr) {
      write("int32array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    float32array(arr) {
      write("float32array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    float64array(arr) {
      write("float64array:");
      return this.dispatch(Array.prototype.slice.call(arr));
    },
    arraybuffer(arr) {
      write("arraybuffer:");
      return this.dispatch(new Uint8Array(arr));
    },
    url(url) {
      return write("url:" + url.toString());
    },
    map(map) {
      write("map:");
      const arr = [...map];
      return this.array(arr, options.unorderedSets !== false);
    },
    set(set) {
      write("set:");
      const arr = [...set];
      return this.array(arr, options.unorderedSets !== false);
    },
    file(file) {
      write("file:");
      return this.dispatch([file.name, file.size, file.type, file.lastModfied]);
    },
    blob() {
      if (options.ignoreUnknown) {
        return write("[blob]");
      }
      throw new Error(
        'Hashing Blob objects is currently not supported\nUse "options.replacer" or "options.ignoreUnknown"\n'
      );
    },
    domwindow() {
      return write("domwindow");
    },
    bigint(number) {
      return write("bigint:" + number.toString());
    },
    /* Node.js standard native objects */
    process() {
      return write("process");
    },
    timer() {
      return write("timer");
    },
    pipe() {
      return write("pipe");
    },
    tcp() {
      return write("tcp");
    },
    udp() {
      return write("udp");
    },
    tty() {
      return write("tty");
    },
    statwatcher() {
      return write("statwatcher");
    },
    securecontext() {
      return write("securecontext");
    },
    connection() {
      return write("connection");
    },
    zlib() {
      return write("zlib");
    },
    context() {
      return write("context");
    },
    nodescript() {
      return write("nodescript");
    },
    httpparser() {
      return write("httpparser");
    },
    dataview() {
      return write("dataview");
    },
    signal() {
      return write("signal");
    },
    fsevent() {
      return write("fsevent");
    },
    tlswrap() {
      return write("tlswrap");
    }
  };
}
const nativeFunc = "[native code] }";
const nativeFuncLength = nativeFunc.length;
function isNativeFunction(f) {
  if (typeof f !== "function") {
    return false;
  }
  return Function.prototype.toString.call(f).slice(-nativeFuncLength) === nativeFunc;
}

function diff(obj1, obj2, opts = {}) {
  const h1 = _toHashedObject(obj1, opts);
  const h2 = _toHashedObject(obj2, opts);
  return _diff(h1, h2, opts);
}
function _diff(h1, h2, opts = {}) {
  const diffs = [];
  const allProps = /* @__PURE__ */ new Set([
    ...Object.keys(h1.props || {}),
    ...Object.keys(h2.props || {})
  ]);
  if (h1.props && h2.props) {
    for (const prop of allProps) {
      const p1 = h1.props[prop];
      const p2 = h2.props[prop];
      if (p1 && p2) {
        diffs.push(..._diff(h1.props?.[prop], h2.props?.[prop], opts));
      } else if (p1 || p2) {
        diffs.push(
          new DiffEntry((p2 || p1).key, p1 ? "removed" : "added", p2, p1)
        );
      }
    }
  }
  if (allProps.size === 0 && h1.hash !== h2.hash) {
    diffs.push(new DiffEntry((h2 || h1).key, "changed", h2, h1));
  }
  return diffs;
}
function _toHashedObject(obj, opts, key = "") {
  if (obj && typeof obj !== "object") {
    return new DiffHashedObject(key, obj, objectHash(obj, opts));
  }
  const props = {};
  const hashes = [];
  for (const _key in obj) {
    props[_key] = _toHashedObject(
      obj[_key],
      opts,
      key ? `${key}.${_key}` : _key
    );
    hashes.push(props[_key].hash);
  }
  return new DiffHashedObject(key, obj, `{${hashes.join(":")}}`, props);
}
class DiffEntry {
  constructor(key, type, newValue, oldValue) {
    this.key = key;
    this.type = type;
    this.newValue = newValue;
    this.oldValue = oldValue;
  }
  toString() {
    return this.toJSON();
  }
  toJSON() {
    switch (this.type) {
      case "added": {
        return `Added   \`${this.key}\``;
      }
      case "removed": {
        return `Removed \`${this.key}\``;
      }
      case "changed": {
        return `Changed \`${this.key}\` from \`${this.oldValue?.toString() || "-"}\` to \`${this.newValue.toString()}\``;
      }
    }
  }
}
class DiffHashedObject {
  constructor(key, value, hash, props) {
    this.key = key;
    this.value = value;
    this.hash = hash;
    this.props = props;
  }
  toString() {
    if (this.props) {
      return `{${Object.keys(this.props).join(",")}}`;
    } else {
      return JSON.stringify(this.value);
    }
  }
  toJSON() {
    const k = this.key || ".";
    if (this.props) {
      return `${k}({${Object.keys(this.props).join(",")}})`;
    }
    return `${k}(${this.value})`;
  }
}

function isEqual(object1, object2, hashOptions = {}) {
  if (object1 === object2) {
    return true;
  }
  if (objectHash(object1, hashOptions) === objectHash(object2, hashOptions)) {
    return true;
  }
  return false;
}

exports.diff = diff;
exports.isEqual = isEqual;
exports.objectHash = objectHash;