import { Component } from '@angular/core';
import * as _ from 'lodash';
import { Logger } from '../../../providers/logger/logger';

// Providers
import { ConfigProvider } from '../../../providers/config/config';
import { FeeProvider } from '../../../providers/fee/fee';

const COIN = 'btc';
const NETWORK = 'livenet';

@Component({
  selector: 'page-fee-policy',
  templateUrl: 'fee-policy.html',
})
export class FeePolicyPage {
  public feeLevels: object;
  public feeOpts: object;
  public currentFeeLevel: string;

  public error;

  public feePerSatByte;
  public avgConfirmationTime;

  constructor(
    private logger: Logger,
    private feeProvider: FeeProvider,
    private configProvider: ConfigProvider
  ) {
    this.feeOpts = this.feeProvider.feeOpts;
    delete this.feeOpts['custom']; // Remove custom level
    this.currentFeeLevel = this.feeProvider.getCurrentFeeLevel();
  }

  ionViewDidEnter() {
    this.error = null;
    this.feeProvider.getFeeLevels(COIN).then((data) => {
      this.feeLevels = data['levels'];
      this.updateCurrentValues();
    }).catch((err) => {
      this.logger.error(err);
      this.error = err;
    });
  }

  public save() {
    if (_.isEmpty(this.currentFeeLevel) || this.currentFeeLevel == this.feeProvider.getCurrentFeeLevel()) return;
    this.logger.debug('New fee level: ' + this.currentFeeLevel);
    this.updateCurrentValues();
    this.setFee();
  }

  private updateCurrentValues() {
    if (_.isEmpty(this.feeLevels) || _.isEmpty(this.currentFeeLevel)) return;

    let value = _.find(this.feeLevels[NETWORK], {
      level: this.currentFeeLevel
    });

    if (_.isEmpty(value)) return;

    this.feePerSatByte = (value['feePerKb'] / 1000).toFixed();
    this.avgConfirmationTime = value['nbBlocks'] * 10;
  }

  private setFee() {
    let opts = {
      wallet: {
        settings: {
          feeLevel: this.currentFeeLevel
        }
      }
    };

    this.configProvider.set(opts);
  }

}