export class Collection<K, V> extends Map<K, V> {
  maxSize?: number;

  set(key: K, value: V) {
    if (this.maxSize || this.maxSize === 0) {
      if (this.size >= this.maxSize) return this
    }

    return super.set(key, value)
  }

  array() {
    return [...this.values()]
  }

  first(): V {
    return this.values().next().value
  }

  last(): V {
    return [...this.values()][this.size - 1]
  }

  random() {
    const arr = [...this.values()]
    return arr[Math.floor(Math.random() * arr.length)]
  }

  find(callback: (value: V, key: K) => boolean) {
    for (const key of this.keys()) {
      const value = this.get(key)!
      if (callback(value, key)) return value
    }
    // If nothing matched
    
  }

  filter(callback: (value: V, key: K) => boolean) {
    const relevant = new Collection<K, V>()
    this.forEach((value, key) => {
      if (callback(value, key)) relevant.set(key, value)
    });

    return relevant;
  }

  map<T>(callback: (value: V, key: K) => T) {
    const results = []
    for (const key of this.keys()) {
      const value = this.get(key)!
      results.push(callback(value, key))
    }
    return results
  }

  some(callback: (value: V, key: K) => boolean) {
    for (const key of this.keys()) {
      const value = this.get(key)!
      if (callback(value, key)) return true
    }

    return false
  }

  every(callback: (value: V, key: K) => boolean) {
    for (const key of this.keys()) {
      const value = this.get(key)!
      if (!callback(value, key)) return false
    }

    return true
  }

  reduce<T>(
    callback: (accumulator: T, value: V, key: K) => T,
    initialValue?: T,
  ): T {
    let accumulator: T = initialValue!

    for (const key of this.keys()) {
      const value = this.get(key)!
      accumulator = callback(accumulator, value, key)
    }

    return accumulator
  }
}