/*
 * Copyright 2016 Resin.io
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

const visuals = require('resin-cli-visuals');
const form = require('resin-cli-form');
const writer = require('./writer');
const utils = require('./utils');
const options = require('./cli');
const log = require('./log');
const EXIT_CODES = require('../src/exit-codes');

form.run([
  {
    message: 'Select drive',
    type: 'drive',
    name: 'drive'
  },
  {
    message: 'This will erase the selected drive. Are you sure?',
    type: 'confirm',
    name: 'yes',
    default: false
  }
], {
  override: {
    drive: options.drive,

    // If `options.yes` is `false`, pass `undefined`,
    // otherwise the question will not be asked because
    // `false` is a defined value.
    yes: options.robot || options.yes || undefined

  }
}).then((answers) => {
  if (!answers.yes) {
    throw new Error('Aborted');
  }

  const progressBars = {
    write: new visuals.Progress('Flashing'),
    check: new visuals.Progress('Validating')
  };

  return writer.writeImage(options._[0], {
    device: answers.drive
  }, {
    unmountOnSuccess: options.unmount,
    validateWriteOnSuccess: options.check
  }, (state) => {

    if (options.robot) {
      log.toStdout(JSON.stringify({
        command: 'progress',
        data: {
          type: state.type,
          percentage: Math.floor(state.percentage),
          eta: state.eta,
          speed: Math.floor(state.speed)
        }
      }));
    } else {
      progressBars[state.type].update(state);
    }

  });
}).then((results) => {

  if (options.robot) {
    log.toStdout(JSON.stringify({
      command: 'done',
      data: {
        passedValidation: results.passedValidation,
        sourceChecksum: results.sourceChecksum
      }
    }));
  } else {
    if (results.passedValidation) {
      console.log('Your flash is complete!');
      console.log(`Checksum: ${results.sourceChecksum}`);
    } else {
      console.error('Validation failed!');
    }
  }

  if (results.passedValidation) {
    process.exit(EXIT_CODES.SUCCESS);
  } else {
    process.exit(EXIT_CODES.VALIDATION_ERROR);
  }

}).catch((error) => {

  if (options.robot) {
    log.toStderr(JSON.stringify({
      command: 'error',
      data: {
        message: error.message
      }
    }));
  } else {
    utils.printError(error);
  }

  process.exit(EXIT_CODES.GENERAL_ERROR);
}).finally(log.close);