'use strict';

var _ = require('lodash');
var $ = require('preconditions').singleton();
var log = require('npmlog');
log.debug = log.verbose;
log.disableColor();

var Bitcore = require('bitcore-lib');

var Common = require('../common');
var Constants = Common.Constants;
var Defaults = Common.Defaults;

var TxProposalAction = require('./txproposalaction');

function TxProposal() {};

TxProposal.Types = {
  SIMPLE: 'simple',
  MULTIPLEOUTPUTS: 'multiple_outputs',
  EXTERNAL: 'external'
};

TxProposal.fromObj = function(obj) {
  var x = new TxProposal();

  x.version = obj.version;
  if (obj.version === '1.0.0') {
    x.type = TxProposal.Types.SIMPLE;
  } else {
    x.type = obj.type;
  }
  x.createdOn = obj.createdOn;
  x.id = obj.id;
  x.walletId = obj.walletId;
  x.creatorId = obj.creatorId;
  x.outputs = obj.outputs;
  x.toAddress = obj.toAddress;
  x.amount = obj.amount;
  x.message = obj.message;
  x.payProUrl = obj.payProUrl;
  x.proposalSignature = obj.proposalSignature;
  x.changeAddress = obj.changeAddress;
  x.inputs = obj.inputs;
  x.requiredSignatures = obj.requiredSignatures;
  x.requiredRejections = obj.requiredRejections;
  x.walletN = obj.walletN;
  x.status = obj.status;
  x.txid = obj.txid;
  x.broadcastedOn = obj.broadcastedOn;
  x.inputPaths = obj.inputPaths;
  x.actions = _.map(obj.actions, function(action) {
    return TxProposalAction.fromObj(action);
  });
  x.outputOrder = obj.outputOrder;
  x.network = obj.network;
  x.fee = obj.fee;
  x.feePerKb = obj.feePerKb;
  x.excludeUnconfirmedUtxos = obj.excludeUnconfirmedUtxos;
  x.proposalSignaturePubKey = obj.proposalSignaturePubKey;
  x.proposalSignaturePubKeySig = obj.proposalSignaturePubKeySig;
  x.addressType = obj.addressType || Constants.SCRIPT_TYPES.P2SH;
  x.derivationStrategy = obj.derivationStrategy || Constants.DERIVATION_STRATEGIES.BIP45;
  x.customData = obj.customData;

  return x;
};

function throwUnsupportedError() {
  var msg = 'Unsupported operation on this transaction proposal';
  log.warn('DEPRECATED: ' + msg);
  throw new Error(msg);
};

TxProposal.prototype.toObject = function() {
  var x = _.cloneDeep(this);
  x.isPending = this.isPending();
  return x;
};

TxProposal.prototype._updateStatus = function() {
  if (this.status != 'pending') return;

  if (this.isRejected()) {
    this.status = 'rejected';
  } else if (this.isAccepted()) {
    this.status = 'accepted';
  }
};

TxProposal.prototype.getBitcoreTx = function() {
  throwUnsupportedError();
};

TxProposal.prototype.getNetworkName = function() {
  return Bitcore.Address(this.changeAddress.address).toObject().network;
};

TxProposal.prototype.getRawTx = function() {
  throwUnsupportedError();
};

TxProposal.prototype.getTotalAmount = function() {
  if (this.type == TxProposal.Types.MULTIPLEOUTPUTS || this.type == TxProposal.Types.EXTERNAL) {
    return _.pluck(this.outputs, 'amount')
      .reduce(function(total, n) {
        return total + n;
      }, 0);
  } else {
    return this.amount;
  }
};

TxProposal.prototype.getActors = function() {
  return _.pluck(this.actions, 'copayerId');
};

TxProposal.prototype.getApprovers = function() {
  return _.pluck(
    _.filter(this.actions, {
      type: 'accept'
    }), 'copayerId');
};

TxProposal.prototype.getActionBy = function(copayerId) {
  return _.find(this.actions, {
    copayerId: copayerId
  });
};

TxProposal.prototype.addAction = function(copayerId, type, comment, signatures, xpub) {
  var action = TxProposalAction.create({
    copayerId: copayerId,
    type: type,
    signatures: signatures,
    xpub: xpub,
    comment: comment,
  });
  this.actions.push(action);
  this._updateStatus();
};

TxProposal.prototype.sign = function() {
  throwUnsupportedError();
};

TxProposal.prototype.reject = function(copayerId, reason) {
  this.addAction(copayerId, 'reject', reason);
};

TxProposal.prototype.isPending = function() {
  return !_.contains(['broadcasted', 'rejected'], this.status);
};

TxProposal.prototype.isAccepted = function() {
  var votes = _.countBy(this.actions, 'type');
  return votes['accept'] >= this.requiredSignatures;
};

TxProposal.prototype.isRejected = function() {
  var votes = _.countBy(this.actions, 'type');
  return votes['reject'] >= this.requiredRejections;
};

TxProposal.prototype.isBroadcasted = function() {
  return this.status == 'broadcasted';
};

TxProposal.prototype.setBroadcasted = function() {
  $.checkState(this.txid);
  this.status = 'broadcasted';
  this.broadcastedOn = Math.floor(Date.now() / 1000);
};

module.exports = TxProposal;