export type StringifyFunction = (
  obj: any,
  ...args: any[]
) => string

export type ParseFunction = (
  repr: string,
  reviver: (k: string, v: any) => any
) => any

export interface IRegistration {
  item?: Function | RegExpConstructor
  prefix?: string
  key?: string
  toJSON?: (_this: any, parent: any) => any,
  fromJSON?: ((current: any, parent: any) => any) | null
}

export function isClassConstructor (k: any): k is { prototype: { constructor: any } } {
  return !!(k.prototype && k.prototype.constructor)
}

export function isClassObject (k: any): k is { constructor: { name: string }} {
  return !!(k.constructor && typeof k.constructor.name === 'string')
}

export function compareNotFalsy (a: any, b: any) {
  return !!a && a === b
}

export function getFunctionName (R: Function) {
  return R.toString().replace(/^function /, '').split('(')[0]
}

export function functionToString (R: Function) {
  return R.toString().replace(/^.+?\{/s, '').replace(/\}.*?$/s, '').trim().replace(/[\t\n\r ]*/g, ' ')
}

/**
 * https://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript
 *
 * https://stackoverflow.com/a/52171480/9023855
 *
 * @param str
 * @param seed
 */
export function cyrb53 (str: string, seed = 0) {
  let h1 = 0xdeadbeef ^ seed; let h2 = 0x41c6ce57 ^ seed
  for (let i = 0, ch; i < str.length; i++) {
    ch = str.charCodeAt(i)
    h1 = Math.imul(h1 ^ ch, 2654435761)
    h2 = Math.imul(h2 ^ ch, 1597334677)
  }
  h1 = Math.imul(h1 ^ h1 >>> 16, 2246822507) ^ Math.imul(h2 ^ h2 >>> 13, 3266489909)
  h2 = Math.imul(h2 ^ h2 >>> 16, 2246822507) ^ Math.imul(h1 ^ h1 >>> 13, 3266489909)
  return 4294967296 * (2097151 & h2) + (h1 >>> 0)
}

/**
 * https://stackoverflow.com/questions/34699529/convert-javascript-class-instance-to-plain-object-preserving-methods
 */
export function extractObjectFromClass (o: any, exclude: string[] = []) {
  const content = {} as any

  Object.getOwnPropertyNames(o).map((prop) => {
    const val = o[prop]
    if (['constructor', ...exclude].includes(prop)) {
      return
    }
    content[prop] = val
  })

  return o
}