import { Buffer } from 'buffer'
import { MsgProtoStake } from '../proto/generated/tx-signer'
import { Any } from '../proto/generated/google/protobuf/any'
import { TxMsg } from './tx-msg'

const MINIMUM_STAKE_AMOUNT = 1000000

/**
 * Model representing a MsgAppStake to stake as an Application in the Pocket Network
 */
export class MsgProtoAppStake extends TxMsg {
  public readonly KEY: string = '/x.apps.MsgProtoStake'
  public readonly AMINO_KEY: string = 'apps/MsgAppStake'
  public readonly pubKey: Buffer
  public readonly chains: string[]
  public readonly amount: string

  /**
   * Constructor for this class
   * @param {Buffer} pubKey - Public key buffer
   * @param {string[]} chains - Network identifier list to be requested by this app
   * @param {string} amount - The amount to stake, must be greater than 0
   */
  constructor(pubKey: string, chains: string[], amount: string) {
    super()
    this.pubKey = Buffer.from(pubKey, 'hex')
    this.chains = chains
    this.amount = amount

    const amountNumber = Number(this.amount)

    if (isNaN(amountNumber)) {
      throw new Error('Amount is not a valid number')
    } else if (amountNumber < MINIMUM_STAKE_AMOUNT) {
      throw new Error(
        'Amount should be bigger than ${MINIMUM_STAKE_AMOUNT} uPOKT'
      )
    } else if (this.chains.length === 0) {
      throw new Error('Chains is empty')
    }
  }

  /**
   * Returns the msg type key
   * @returns {string} - Msg type key value.
   * @memberof MsgAppStake
   */
  public getMsgTypeKey(): string {
    return this.KEY
  }

  /**
   * Converts an Msg Object to StdSignDoc
   * @returns {object} - Msg type key value.
   * @memberof MsgAppStake
   */
  public toStdSignDocMsgObj(): object {
    return {
      type: this.AMINO_KEY,
      value: {
        chains: this.chains,
        pubkey: {
          type: 'crypto/ed25519_public_key',
          value: this.pubKey.toString('hex'),
        },
        value: this.amount,
      },
    }
  }

  /**
   * Converts an Msg Object for StdTx encoding
   * @returns {any} - Msg type key value.
   * @memberof MsgAppStake
   */
  public toStdTxMsgObj(): any {
    const data = {
      pubKey: this.pubKey,
      chains: this.chains,
      value: this.amount,
    }

    return Any.fromJSON({
      typeUrl: this.KEY,
      value: Buffer.from(MsgProtoStake.encode(data).finish()).toString(
        'base64'
      ),
    })
  }
}