import * as _ from 'lodash'
import * as assert from 'assert'
const {Validator} = require('jsonschema')
import {ValidationError} from './errors'
import {isValidClassicAddress, isValidXAddress} from 'ripple-address-codec'
import {isValidSecret} from '../utils'

function loadSchemas() {
  // listed explicitly for webpack (instead of scanning schemas directory)
  const schemas = [
    require('./schemas/objects/tx-json.json'),
    require('./schemas/objects/transaction-type.json'),
    require('./schemas/objects/hash128.json'),
    require('./schemas/objects/hash256.json'),
    require('./schemas/objects/sequence.json'),
    require('./schemas/objects/ticket-sequence.json'),
    require('./schemas/objects/signature.json'),
    require('./schemas/objects/issue.json'),
    require('./schemas/objects/ledger-version.json'),
    require('./schemas/objects/max-adjustment.json'),
    require('./schemas/objects/memo.json'),
    require('./schemas/objects/memos.json'),
    require('./schemas/objects/public-key.json'),
    require('./schemas/objects/private-key.json'),
    require('./schemas/objects/uint32.json'),
    require('./schemas/objects/value.json'),
    require('./schemas/objects/source-adjustment.json'),
    require('./schemas/objects/destination-adjustment.json'),
    require('./schemas/objects/tag.json'),
    require('./schemas/objects/lax-amount.json'),
    require('./schemas/objects/lax-lax-amount.json'),
    require('./schemas/objects/min-adjustment.json'),
    require('./schemas/objects/source-exact-adjustment.json'),
    require('./schemas/objects/destination-exact-adjustment.json'),
    require('./schemas/objects/destination-address-tag.json'),
    require('./schemas/objects/transaction-hash.json'),
    require('./schemas/objects/address.json'),
    require('./schemas/objects/x-address.json'),
    require('./schemas/objects/classic-address.json'),
    require('./schemas/objects/adjustment.json'),
    require('./schemas/objects/quality.json'),
    require('./schemas/objects/amount.json'),
    require('./schemas/objects/amountbase.json'),
    require('./schemas/objects/balance.json'),
    require('./schemas/objects/blob.json'),
    require('./schemas/objects/currency.json'),
    require('./schemas/objects/signed-value.json'),
    require('./schemas/objects/orderbook.json'),
    require('./schemas/objects/instructions.json'),
    require('./schemas/objects/settings-plus-memos.json'),
    require('./schemas/specifications/settings.json'),
    require('./schemas/specifications/payment.json'),
    require('./schemas/specifications/get-payment.json'),
    require('./schemas/specifications/escrow-cancellation.json'),
    require('./schemas/specifications/order-cancellation.json'),
    require('./schemas/specifications/order.json'),
    require('./schemas/specifications/escrow-execution.json'),
    require('./schemas/specifications/escrow-creation.json'),
    require('./schemas/specifications/payment-channel-create.json'),
    require('./schemas/specifications/payment-channel-fund.json'),
    require('./schemas/specifications/payment-channel-claim.json'),
    require('./schemas/specifications/check-create.json'),
    require('./schemas/specifications/check-cash.json'),
    require('./schemas/specifications/check-cancel.json'),
    require('./schemas/specifications/trustline.json'),
    require('./schemas/specifications/deposit-preauth.json'),
    require('./schemas/specifications/account-delete.json'),
    require('./schemas/output/sign.json'),
    require('./schemas/output/submit.json'),
    require('./schemas/output/get-account-info.json'),
    require('./schemas/output/get-account-objects.json'),
    require('./schemas/output/get-balances.json'),
    require('./schemas/output/get-balance-sheet.json'),
    require('./schemas/output/get-ledger.json'),
    require('./schemas/output/get-orderbook.json'),
    require('./schemas/output/get-orders.json'),
    require('./schemas/output/order-change.json'),
    require('./schemas/output/get-payment-channel.json'),
    require('./schemas/output/prepare.json'),
    require('./schemas/output/ledger-event.json'),
    require('./schemas/output/get-paths.json'),
    require('./schemas/output/get-server-info.json'),
    require('./schemas/output/get-settings.json'),
    require('./schemas/output/orderbook-orders.json'),
    require('./schemas/output/outcome.json'),
    require('./schemas/output/get-transaction.json'),
    require('./schemas/output/get-transactions.json'),
    require('./schemas/output/get-trustlines.json'),
    require('./schemas/output/sign-payment-channel-claim.json'),
    require('./schemas/output/verify-payment-channel-claim.json'),
    require('./schemas/input/get-balances.json'),
    require('./schemas/input/get-balance-sheet.json'),
    require('./schemas/input/get-ledger.json'),
    require('./schemas/input/get-orders.json'),
    require('./schemas/input/get-orderbook.json'),
    require('./schemas/input/get-paths.json'),
    require('./schemas/input/get-payment-channel.json'),
    require('./schemas/input/api-options.json'),
    require('./schemas/input/get-settings.json'),
    require('./schemas/input/get-account-info.json'),
    require('./schemas/input/get-account-objects.json'),
    require('./schemas/input/get-transaction.json'),
    require('./schemas/input/get-transactions.json'),
    require('./schemas/input/get-trustlines.json'),
    require('./schemas/input/prepare-payment.json'),
    require('./schemas/input/prepare-order.json'),
    require('./schemas/input/prepare-trustline.json'),
    require('./schemas/input/prepare-order-cancellation.json'),
    require('./schemas/input/prepare-settings.json'),
    require('./schemas/input/prepare-escrow-creation.json'),
    require('./schemas/input/prepare-escrow-cancellation.json'),
    require('./schemas/input/prepare-escrow-execution.json'),
    require('./schemas/input/prepare-payment-channel-create.json'),
    require('./schemas/input/prepare-payment-channel-fund.json'),
    require('./schemas/input/prepare-payment-channel-claim.json'),
    require('./schemas/input/prepare-check-create.json'),
    require('./schemas/input/prepare-check-cash.json'),
    require('./schemas/input/prepare-check-cancel.json'),
    require('./schemas/input/prepare-ticket-create.json'),
    require('./schemas/input/compute-ledger-hash.json'),
    require('./schemas/input/sign.json'),
    require('./schemas/input/submit.json'),
    require('./schemas/input/generate-address.json'),
    require('./schemas/input/sign-payment-channel-claim.json'),
    require('./schemas/input/verify-payment-channel-claim.json'),
    require('./schemas/input/combine.json')
  ]
  const titles = schemas.map((schema) => schema.title)
  const duplicates = Object.keys(_.pickBy(_.countBy(titles), (count) => count > 1))
  assert.ok(duplicates.length === 0, 'Duplicate schemas for: ' + duplicates)
  const validator = new Validator()
  // Register custom format validators that ignore undefined instances
  // since jsonschema will still call the format validator on a missing
  // (optional)  property

  // This relies on "format": "xAddress" in `x-address.json`!
  validator.customFormats.xAddress = function (instance) {
    if (instance == null) {
      return true
    }
    return isValidXAddress(instance)
  }

  // This relies on "format": "classicAddress" in `classic-address.json`!
  validator.customFormats.classicAddress = function (instance) {
    if (instance == null) {
      return true
    }
    return isValidAddress(instance)
  }

  validator.customFormats.secret = function (instance) {
    if (instance == null) {
      return true
    }
    return isValidSecret(instance)
  }

  // Register under the root URI '/'
  schemas.forEach((schema) =>
    validator.addSchema(schema, '/' + schema.title)
  )
  return validator
}

const schemaValidator = loadSchemas()

function schemaValidate(schemaName: string, object: any): void {
  // Lookup under the root URI '/'
  const schema = schemaValidator.getSchema('/' + schemaName)
  if (schema == null) {
    throw new ValidationError('no schema for ' + schemaName)
  }
  const result = schemaValidator.validate(object, schema)
  if (!result.valid) {
    throw new ValidationError(result.errors.join())
  }
}

function isValidAddress(address: string): boolean {
  return isValidXAddress(address) || isValidClassicAddress(address)
}

export {schemaValidate, isValidSecret, isValidAddress}