/**
* @ignore
*/
export const ERROR_CODES = {
  MISSING_PARAMETER: 'missing_parameter',
  REMOTE_SERVICE_ERROR: 'remote_service_error',
  INVALID_STATE: 'invalid_state',
  NO_SESSION_DATA: 'no_session_data',
  DOES_NOT_EXIST: 'does_not_exist',
  FAILED_DECRYPTION_ERROR: 'failed_decryption_error',
  INVALID_DID_ERROR: 'invalid_did_error',
  NOT_ENOUGH_FUNDS_ERROR: 'not_enough_error',
  INVALID_AMOUNT_ERROR: 'invalid_amount_error',
  LOGIN_FAILED_ERROR: 'login_failed',
  SIGNATURE_VERIFICATION_ERROR: 'signature_verification_failure',
  CONFLICT_ERROR: 'conflict_error',
  NOT_ENOUGH_PROOF_ERROR: 'not_enough_proof_error',
  BAD_PATH_ERROR: 'bad_path_error',
  VALIDATION_ERROR: 'validation_error',
  PAYLOAD_TOO_LARGE_ERROR: 'payload_too_large_error',
  PRECONDITION_FAILED_ERROR: 'precondition_failed_error',
  UNKNOWN: 'unknown'
}

Object.freeze(ERROR_CODES)

/**
* @ignore
*/
type ErrorData = {
  code: string,
  parameter?: string,
  message: string
}

/**
* @ignore
*/
export class BlockstackError extends Error {
  message: string

  code: string

  parameter?: string

  constructor(error: ErrorData) {
    super()
    let message = error.message
    let bugDetails = `Error Code: ${error.code}`
    let stack = this.stack
    if (!stack) { 
      try {
        throw new Error()
      } catch (e) {
        stack = e.stack
      }
    } else {
      bugDetails += `Stack Trace:\n${stack}`
    }
    message += `\nIf you believe this exception is caused by a bug in blockstack.js,
      please file a bug report: https://github.com/blockstack/blockstack.js/issues\n\n${bugDetails}`
    this.message = message
    this.code = error.code
    this.parameter = error.parameter ? error.parameter : null
  }
  
  toString() {
    return `${super.toString()}
    code: ${this.code} param: ${this.parameter ? this.parameter : 'n/a'}`
  }
}

/**
* @ignore
*/
export class InvalidParameterError extends BlockstackError {
  constructor(parameter: string, message: string = '') {
    super({ code: ERROR_CODES.MISSING_PARAMETER, message, parameter: '' })
    this.name = 'MissingParametersError'
  }
}

/**
* @ignore
*/
export class MissingParameterError extends BlockstackError {
  constructor(parameter: string, message: string = '') {
    super({ code: ERROR_CODES.MISSING_PARAMETER, message, parameter })
    this.name = 'MissingParametersError'
  }
}

/**
* @ignore
*/
export class RemoteServiceError extends BlockstackError {
  response: Response

  constructor(response: Response, message: string = '') {
    super({ code: ERROR_CODES.REMOTE_SERVICE_ERROR, message })
    this.response = response
  }
}

/**
* @ignore
*/
export class InvalidDIDError extends BlockstackError {
  constructor(message: string = '') {
    super({ code: ERROR_CODES.INVALID_DID_ERROR, message })
    this.name = 'InvalidDIDError'
  }
}

/**
* @ignore
*/
export class NotEnoughFundsError extends BlockstackError {
  leftToFund: number

  constructor(leftToFund: number) {
    const message = `Not enough UTXOs to fund. Left to fund: ${leftToFund}`
    super({ code: ERROR_CODES.NOT_ENOUGH_FUNDS_ERROR, message })
    this.leftToFund = leftToFund
    this.name = 'NotEnoughFundsError'
    this.message = message
  }
}

/**
* @ignore
*/
export class InvalidAmountError extends BlockstackError {
  fees: number

  specifiedAmount: number

  constructor(fees: number, specifiedAmount: number) {
    const message = `Not enough coin to fund fees transaction fees. Fees would be ${fees},`
          + ` specified spend is  ${specifiedAmount}`
    super({ code: ERROR_CODES.INVALID_AMOUNT_ERROR, message })
    this.specifiedAmount = specifiedAmount
    this.fees = fees
    this.name = 'InvalidAmountError'
    this.message = message
  }
}

/**
* @ignore
*/
export class LoginFailedError extends BlockstackError {
  constructor(reason: string) {
    const message = `Failed to login: ${reason}`
    super({ code: ERROR_CODES.LOGIN_FAILED_ERROR, message })
    this.message = message
    this.name = 'LoginFailedError'
  }
}

/**
* @ignore
*/
export class SignatureVerificationError extends BlockstackError {
  constructor(reason: string) {
    const message = `Failed to verify signature: ${reason}`
    super({ code: ERROR_CODES.SIGNATURE_VERIFICATION_ERROR, message })
    this.message = message
    this.name = 'SignatureVerificationError'
  }
}

/**
* @ignore
*/
export class FailedDecryptionError extends BlockstackError {
  constructor(message: string = 'Unable to decrypt cipher object.') {
    super({ code: ERROR_CODES.FAILED_DECRYPTION_ERROR, message })
    this.message = message
    this.name = 'FailedDecryptionError'
  }
}

/**
* @ignore
*/
export class InvalidStateError extends BlockstackError {
  constructor(message: string) {
    super({ code: ERROR_CODES.INVALID_STATE, message })
    this.message = message
    this.name = 'InvalidStateError'
  }
}

/**
* @ignore
*/
export class NoSessionDataError extends BlockstackError {
  constructor(message: string) {
    super({ code: ERROR_CODES.INVALID_STATE, message })
    this.message = message
    this.name = 'NoSessionDataError'
  }
}

/**
* @ignore
*/
export interface GaiaHubErrorResponse {
  status: number, 
  statusText: string,
  body?: string | any
}

export interface HubErrorDetails {
  message?: string
  statusCode: number
  statusText: string
  [prop: string]: any
}

/**
* @ignore
*/
export class GaiaHubError extends BlockstackError {
  hubError: HubErrorDetails

  constructor(error: ErrorData, response: GaiaHubErrorResponse) {
    super(error)
    if (response) {
      this.hubError = {
        statusCode: response.status,
        statusText: response.statusText
      }
      if (typeof response.body === 'string') {
        this.hubError.message = response.body
      } else if (typeof response.body === 'object') {
        Object.assign(this.hubError, response.body)
      }
    }
  }
}

/**
* @ignore
*/
export class DoesNotExist extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.DOES_NOT_EXIST }, response)
    this.name = 'DoesNotExist'
  }
}

/**
* @ignore
*/
export class ConflictError extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.CONFLICT_ERROR }, response)
    this.name = 'ConflictError'
  }
}

/**
* @ignore
*/
export class NotEnoughProofError extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.NOT_ENOUGH_PROOF_ERROR }, response)
    this.name = 'NotEnoughProofError'
  }
}

/**
* @ignore
*/
export class BadPathError extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.BAD_PATH_ERROR }, response)
    this.name = 'BadPathError'
  }
}

/**
* @ignore
*/
export class ValidationError extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.VALIDATION_ERROR }, response)
    this.name = 'ValidationError'
  }
}

/**
 * @ignore
 */
export class PayloadTooLargeError extends GaiaHubError {
  /** Can be `null` when an oversized payload is detected client-side. */
  hubError: HubErrorDetails

  maxUploadByteSize: number;

  constructor(message: string, response: GaiaHubErrorResponse, maxUploadByteSize: number) {
    super({ message, code: ERROR_CODES.PAYLOAD_TOO_LARGE_ERROR }, response)
    this.name = 'PayloadTooLargeError'
    this.maxUploadByteSize = maxUploadByteSize
  }
}

/**
 * @ignore
 */
export class PreconditionFailedError extends GaiaHubError {
  constructor(message: string, response: GaiaHubErrorResponse) {
    super({ message, code: ERROR_CODES.PRECONDITION_FAILED_ERROR }, response)
    this.name = 'PreconditionFailedError'
  }
}