'use strict';
var bitcore = require('bitcore');

angular.module('copayApp.services')
  .factory('controllerUtils', function($rootScope, $sce, $location, $filter, notification, $timeout, uriHandler, rateService) {
    var root = {};


    root.redirIfNotComplete = function() {
      var w = $rootScope.wallet;
      if (w) {
        if (!w.isReady()) {
          $location.path('/copayers');
        }
      } else {
        $location.path('/');
      }
    };


    root.redirIfLogged = function() {
      var w = $rootScope.wallet;
      if (w) {
        if (!w.isReady()) {
          $location.path('/copayers');
        } else {
          $location.path('receive');
        }
      }
    };

    root.logout = function() {

      if ($rootScope.iden) {
        $rootScope.iden.store(null, function() {
          $rootScope.iden.close();

          delete $rootScope['wallet'];
          delete $rootScope['iden'];

          // Clear rootScope
          for (var i in $rootScope) {
            if (i.charAt(0) != '$') {
              delete $rootScope[i];
            }
          }

          $location.path('/');

        });
      }
    };

    root.onError = function(scope) {
      if (scope) scope.loading = false;
    }

    root.onErrorDigest = function(scope, msg) {
      root.onError(scope);
      if (msg) {
        notification.error('Error', msg);
      }
    };


    root.isFocusedWallet = function(wid) {
      return wid === $rootScope.wallet.getId();
    };


    root.updateTxsAndBalance = _.debounce(function(w) {
      root.updateTxs({
        wallet: w
      });
      root.updateBalance(w, function() {
        $rootScope.$digest();
      })
    }, 3000);

    root.installWalletHandlers = function($scope, w) {

      var wid = w.getId();
      w.on('connectionError', function() {
        if (root.isFocusedWallet(wid)) {
          var message = "Could not connect to the Insight server. Check your settings and network configuration";
          notification.error('Networking Error', message);
          root.onErrorDigest($scope);
        }
      });

      w.on('corrupt', function(peerId) {
        if (root.isFocusedWallet(wid)) {
          notification.error('Error', $filter('translate')('Received corrupt message from ') + peerId);
        }
      });
      w.on('ready', function(myPeerID) {
        $scope.loading = false;
        if ($rootScope.initialConnection) {
          $rootScope.initialConnection = false;
          if ($rootScope.pendingPayment) {
            $location.path('send');
          } else {
            root.redirIfLogged();
          }
        }
      });

      w.on('tx', function(address, isChange) {
        if (!isChange) {
          notification.funds('Funds received on ' + w.getName(), address);
        }
        root.updateBalance(w, function() {
          $rootScope.$digest();
        });
      });

      w.on('balanceUpdated', function() {
        root.updateBalance(w, function() {
          $rootScope.$digest();
        });
      });

      w.on('insightReconnected', function() {
        $rootScope.reconnecting = false;
        root.updateAddressList(w.getId());
        root.updateBalance(w, function() {
          $rootScope.$digest();
        });
      });

      w.on('insightError', function() {
        if (root.isFocusedWallet(wid)) {
          $rootScope.reconnecting = true;
          $rootScope.$digest();
        }
      });
      w.on('newAddresses', function() {
        root.updateTxsAndBalance(w);
      });

      w.on('txProposalsUpdated', function() {
        root.updateTxsAndBalance(w);
      });

      w.on('txProposalEvent', function(e) {

        // TODO: add wallet name notification
        var user = w.publicKeyRing.nicknameForCopayer(e.cId);
        switch (e.type) {
          case 'signed':
            notification.info('Transaction Update', $filter('translate')('A transaction was signed by') + ' ' + user);
            break;
          case 'rejected':
            notification.info('Transaction Update', $filter('translate')('A transaction was rejected by') + ' ' + user);
            break;
          case 'corrupt':
            notification.error('Transaction Error', $filter('translate')('Received corrupt transaction from') + ' ' + user);
            break;
        }
      });
      w.on('addressBookUpdated', function(dontDigest) {
        if (root.isFocusedWallet(wid)) {
          if (!dontDigest) {
            $rootScope.$digest();
          }
        }
      });
      w.on('connect', function(peerID) {
        $rootScope.$digest();
      });
      w.on('close', root.onErrorDigest);
      w.on('locked', root.onErrorDigest.bind(this));

    };

    root.setupGlobalVariables = function(iden) {
      notification.enableHtml5Mode(); // for chrome: if support, enable it
      uriHandler.register();
      $rootScope.unitName = config.unitName;
      $rootScope.txAlertCount = 0;
      $rootScope.initialConnection = true;
      $rootScope.reconnecting = false;
      $rootScope.isCollapsed = true;

      $rootScope.iden = iden;

      // TODO
      // $rootScope.$watch('txAlertCount', function(txAlertCount) {
      //   if (txAlertCount && txAlertCount > 0) {
      //
      //     notification.info('New Transaction', ($rootScope.txAlertCount == 1) ? 'You have a pending transaction proposal' : $filter('translate')('You have') + ' ' + $rootScope.txAlertCount + ' ' + $filter('translate')('pending transaction proposals'), txAlertCount);
      //   }
      // });
    };


    root.rebindWallets = function($scope, iden) {
      _.each(iden.listWallets(), function(wallet) {
        preconditions.checkState(wallet);
        root.installWalletHandlers($scope, wallet);
      });
    };

    root.setFocusedWallet = function(w) {
      if (!_.isObject(w))
        w = $rootScope.iden.getWalletById(w);
      preconditions.checkState(w && _.isObject(w));

      $rootScope.wallet = w;
      w.updateTimestamp(new Date().getTime(), function() {
        root.redirIfLogged();
        root.updateBalance(w, function() {
          $rootScope.$digest();
        })
      });
    };

    root.bindProfile = function($scope, iden, w) {
      root.setupGlobalVariables(iden);
      root.rebindWallets($scope, iden);
      if (w) {
        root.setFocusedWallet(w);
      } else {
        $location.path('/manage');
      }
    };

    // On the focused wallet
    root.updateAddressList = function(wid) {

      if (!wid || root.isFocusedWallet(wid)) {
        var w = $rootScope.wallet;

        if (w && w.isReady()) {
          $rootScope.addrInfos = w.getAddressesInfo();
        }
      }
    };

    var _balanceCache = {};
    root.clearBalanceCache = function(w) {
      delete _balanceCache[w.getId()];
    };


    root._computeBalance = function(w, cb) {
      cb = cb || function() {};
      var satToUnit = 1 / w.settings.unitToSatoshi;
      var COIN = bitcore.util.COIN;

      w.getBalance(function(err, balanceSat, balanceByAddrSat, safeBalanceSat) {
        if (err) return cb(err);

        var r = {};
        r.totalBalance = balanceSat * satToUnit;
        r.totalBalanceBTC = (balanceSat / COIN);
        r.availableBalance = safeBalanceSat * satToUnit;
        r.availableBalanceBTC = (safeBalanceSat / COIN);

        r.lockedBalance = (balanceSat - safeBalanceSat) * satToUnit;
        r.lockedBalanceBTC = (balanceSat - safeBalanceSat) / COIN;

        var balanceByAddr = {};
        for (var ii in balanceByAddrSat) {
          balanceByAddr[ii] = balanceByAddrSat[ii] * satToUnit;
        }
        r.balanceByAddr = balanceByAddr;
        root.updateAddressList();
        r.updatingBalance = false;

        rateService.whenAvailable(function() {
          r.totalBalanceAlternative = rateService.toFiat(balanceSat, w.settings.alternativeIsoCode);
          r.alternativeIsoCode = w.settings.alternativeIsoCode;
          r.lockedBalanceAlternative = rateService.toFiat(balanceSat - safeBalanceSat, w.settings.alternativeIsoCode);
          r.alternativeConversionRate = rateService.toFiat(100000000, w.settings.alternativeIsoCode);
          return cb(null, r)
        });
      });
    };

    root._updateScope = function(w, data, $scope, cb) {
      $scope.totalBalance = data.totalBalance;
      $scope.totalBalanceBTC = data.totalBalanceBTC;
      $scope.availableBalance = data.availableBalance;
      $scope.availableBalanceBTC = data.availableBalanceBTC;

      $scope.lockedBalance = data.lockedBalance;
      $scope.lockedBalanceBTC = data.lockedBalanceBTC;

      $scope.balanceByAddr = data.balanceByAddr;

      $scope.totalBalanceAlternative = data.totalBalanceAlternative;
      $scope.alternativeIsoCode = data.alternativeIsoCode;
      $scope.lockedBalanceAlternative = data.lockedBalanceAlternative;
      $scope.alternativeConversionRate = data.alternativeConversionRate;

      if (cb) return cb();
    };

    root.updateBalance = function(w, cb) {
      w = w || $rootScope.wallet;
      if (!w) return root.onErrorDigest();
      if (!w.isReady()) return;
      console.log('## Updating balance of:' + w.id)

      w.balanceInfo = {};
      var scope = root.isFocusedWallet(w.id) ? $rootScope : w.balanceInfo;

      root.updateAddressList();

      var wid = w.getId();

      if (_balanceCache[wid]) {
        root._updateScope(w, _balanceCache[wid], scope, function() {
          if (root.isFocusedWallet(w.id)) {
            setTimeout(function() {
              $rootScope.$digest();
            }, 1);
          }
        });
      } else {
        scope.updatingBalance = true;
      }

      root._computeBalance(w, function(err, res) {
        if (err) throw err;
        _balanceCache[wid] = res;
        root._updateScope(w, _balanceCache[wid], scope, function() {
          scope.updatingBalance = false;
          if (cb) cb();
        });
      });
    };

    root.updateTxs = function(opts) {
      var w = opts.wallet || $rootScope.wallet;
      if (!w) return;
      opts = opts || $rootScope.txsOpts || {};

      var satToUnit = 1 / w.settings.unitToSatoshi;
      var myCopayerId = w.getMyCopayerId();
      var pendingForUs = 0;
      var inT = w.getTxProposals().sort(function(t1, t2) {
        return t2.createdTs - t1.createdTs
      });
      var txs = [];

      inT.forEach(function(i, index) {
        if (opts.skip && (index < opts.skip[0] || index >= opts.skip[1])) {
          return txs.push(null);
        }

        if (i.isPending && myCopayerId != i.creator && !i.rejectedByUs && !i.signedByUs) {
          pendingForUs++;
        }

        if (!!opts.pending == !!i.isPending) {
          var tx = i.builder.build();
          var outs = [];
          tx.outs.forEach(function(o) {
            var addr = bitcore.Address.fromScriptPubKey(o.getScript(), w.getNetworkName())[0].toString();
            if (!w.addressIsOwn(addr, {
              excludeMain: true
            })) {
              outs.push({
                address: addr,
                value: bitcore.util.valueToBigInt(o.getValue()) * satToUnit,
              });
            }
          });
          // extra fields
          i.outs = outs;
          i.fee = i.builder.feeSat * satToUnit;
          i.missingSignatures = tx.countInputMissingSignatures(0);
          i.actionList = getActionList(i.peerActions);
          txs.push(i);
        }
      });

      // Disabling this as discrepancies in local time on copayer machines is causing
      // valid TXPs to get removed
      //w.removeTxWithSpentInputs();

      $rootScope.txs = txs;
      $rootScope.txsOpts = opts;
      if ($rootScope.pendingTxCount < pendingForUs) {
        $rootScope.txAlertCount = pendingForUs;
      }
      $rootScope.pendingTxCount = pendingForUs;
    };

    root.deleteWallet = function($scope, w) {
      w = w || $rootScope.wallet;
      $rootScope.iden.deleteWallet(w.id, function() {
        notification.info('Wallet deleted', $filter('translate')('Wallet deleted'));
        $rootScope.wallet = null;
        var lastFocused = $rootScope.iden.getLastFocusedWallet();
        root.bindProfile($scope, $rootScope.iden, lastFocused);
      });
    };

    function getActionList(actions) {
      var peers = Object.keys(actions).map(function(i) {
        return {
          cId: i,
          actions: actions[i]
        }
      });

      return peers.sort(function(a, b) {
        return !!b.actions.create - !!a.actions.create;
      });
    }



    return root;
  });