const types = require('./types/index.js')
const BaseType = require('./types/base.js') // eslint-disable-line
const validator = {}
module.exports = validator

validator.Base = types.Base
validator.string = () => new types.StringType()
validator.number = () => new types.NumberType()
validator.boolean = () => new types.BooleanType()
validator.array = () => new types.ArrayType()
validator.object = () => new types.ObjectType()

/**
 * @exports
 * @typedef SchemaField
 * @property {BaseType} type
 * @property {SchemaField} children
 */
/**
 * @exports
 * @typedef {Object<string, SchemaField|BaseType>} Schema
 */

/**
 * validate
 * @param {Object} src
 * @param {Schema} schema
 */
validator.validate = function (src, schema) {
  if (typeof src !== 'object' || typeof schema !== 'object') throw new Error('source or schema not object')

  for (const it in schema) {
    if (schema[it] instanceof BaseType) {
      const result = schema[it].validate(src[it])
      if (result) throw new Error(`field [${it}]: ${result}`)
    } else if (typeof schema[it] === 'object' && 'type' in schema[it] && schema[it].type instanceof BaseType) {
      const result = schema[it].type.validate(src[it])
      if (result) throw new Error(`field [${it}]: ${result}`)
    } else {
      throw new Error('not get any check schema type')
    }

    if (typeof schema[it] === 'object' && 'children' in schema[it]) {
      validator.validate(src[it], schema[it].children)
    }
  }
}