export function deepClone<T>(obj: T): T {
  return JSON.parse(JSON.stringify(obj))
}

export function deepEqual(obj1: any, obj2: any) {
  const keys1 = Object.keys(obj1)
  const keys2 = Object.keys(obj2)
  if (keys1.length !== keys2.length) {
    return false
  }
  for (const key of keys1) {
    if (!obj2.hasOwnProperty(key)) {
      return false
    }
    if (typeof obj1[key] === 'object' && typeof obj2[key] === 'object') {
      if (!deepEqual(obj1[key], obj2[key])) {
        return false
      }
    } else {
      if (obj1[key] !== obj2[key]) {
        return false
      }
    }
  }
  return true
}

export function deepMerge<T>(target: T, source: Partial<T>): T {
  function isObject(value: any): value is Record<string, any> {
    return (
      value !== null &&
      typeof value === 'object' &&
      !Array.isArray(value) &&
      !(value instanceof Date) &&
      !(value instanceof RegExp)
    )
  }

  if (isObject(target) && isObject(source)) {
    const result = { ...target }

    for (const key in source) {
      const targetValue = (target as any)[key]
      const sourceValue = (source as any)[key]

      if (isObject(sourceValue) && isObject(targetValue)) {
        // @ts-ignore
        result[key] = deepMerge(targetValue, sourceValue)
      } else {
        result[key] = sourceValue
      }
    }

    return result
  }

  return source as T
}