/* global LIMITS */
import FileSender from './fileSender';
import FileReceiver from './fileReceiver';
import { copyToClipboard, delay, openLinksInNewTab, percent } from './utils';
import * as metrics from './metrics';
import { bytes } from './utils';
import okDialog from './ui/okDialog';
import copyDialog from './ui/copyDialog';
import signupDialog from './ui/signupDialog';

export default function(state, emitter) {
  let lastRender = 0;
  let updateTitle = false;

  function render() {
    emitter.emit('render');
  }

  async function checkFiles() {
    const changes = await state.user.syncFileList();
    const rerender = changes.incoming || changes.downloadCount;
    if (rerender) {
      render();
    }
  }

  function updateProgress() {
    if (updateTitle) {
      emitter.emit('DOMTitleChange', percent(state.transfer.progressRatio));
    }
    render();
  }

  emitter.on('DOMContentLoaded', () => {
    document.addEventListener('blur', () => (updateTitle = true));
    document.addEventListener('focus', () => {
      updateTitle = false;
      emitter.emit('DOMTitleChange', 'Firefox Send');
    });
    checkFiles();
  });

  emitter.on('render', () => {
    lastRender = Date.now();
  });

  emitter.on('login', email => {
    state.user.login(email);
  });

  emitter.on('logout', () => {
    state.user.logout();
    metrics.loggedOut({ trigger: 'button' });
    emitter.emit('pushState', '/');
  });

  emitter.on('removeUpload', file => {
    state.archive.remove(file);
    render();
  });

  emitter.on('delete', async ownedFile => {
    try {
      metrics.deletedUpload({
        size: ownedFile.size,
        time: ownedFile.time,
        speed: ownedFile.speed,
        type: ownedFile.type,
        ttl: ownedFile.expiresAt - Date.now(),
        location
      });
      state.storage.remove(ownedFile.id);
      await ownedFile.del();
    } catch (e) {
      state.raven.captureException(e);
    }
    render();
  });

  emitter.on('cancel', () => {
    state.transfer.cancel();
  });

  emitter.on('addFiles', async ({ files }) => {
    if (files.length < 1) {
      return;
    }
    const maxSize = state.user.maxSize;
    try {
      state.archive.addFiles(files, maxSize);
    } catch (e) {
      if (e.message === 'fileTooBig' && maxSize < LIMITS.MAX_FILE_SIZE) {
        return emitter.emit('signup-cta', 'size');
      }
      state.modal = okDialog(
        state.translate(e.message, {
          size: bytes(maxSize),
          count: LIMITS.MAX_FILES_PER_ARCHIVE
        })
      );
    }
    render();
  });

  emitter.on('signup-cta', source => {
    state.modal = signupDialog(source);
    render();
  });

  /*
    FIXME choo on Edge double-triggers loaded routes
    causing 'authenticate' to fire twice which leads to
    an error. Until that's fixed we have authLocked to
    prevent the second event from causing the error.
    Once choo doesn't double-trigger we can remove authLocked.
  */
  let authLocked = false;
  emitter.on('authenticate', async (code, oauthState) => {
    if (authLocked) {
      return;
    }
    authLocked = true;
    try {
      await state.user.finishLogin(code, oauthState);
      await state.user.syncFileList();
      emitter.emit('replaceState', '/');
    } catch (e) {
      emitter.emit('replaceState', '/error');
      setTimeout(render);
    }
    authLocked = false;
  });

  emitter.on('upload', async () => {
    if (state.storage.files.length >= LIMITS.MAX_ARCHIVES_PER_USER) {
      state.modal = okDialog(
        state.translate('tooManyArchives', {
          count: LIMITS.MAX_ARCHIVES_PER_USER
        })
      );
      return render();
    }
    const archive = state.archive;
    const sender = new FileSender();

    sender.on('progress', updateProgress);
    sender.on('encrypting', render);
    sender.on('complete', render);
    state.transfer = sender;
    state.uploading = true;
    render();

    const links = openLinksInNewTab();
    await delay(200);
    const start = Date.now();
    try {
      const ownedFile = await sender.upload(archive, state.user.bearerToken);
      state.storage.totalUploads += 1;
      const duration = Date.now() - start;
      metrics.completedUpload(archive, duration);

      state.storage.addFile(ownedFile);
      // TODO integrate password into /upload request
      if (archive.password) {
        emitter.emit('password', {
          password: archive.password,
          file: ownedFile
        });
      }
      state.modal = copyDialog(ownedFile.name, ownedFile.url);
    } catch (err) {
      if (err.message === '0') {
        //cancelled. do nothing
        const duration = Date.now() - start;
        metrics.cancelledUpload(archive, duration);
        render();
      } else {
        // eslint-disable-next-line no-console
        console.error(err);
        state.raven.captureException(err);
        metrics.stoppedUpload(archive);
        emitter.emit('pushState', '/error');
      }
    } finally {
      openLinksInNewTab(links, false);
      archive.clear();
      state.uploading = false;
      state.transfer = null;
      await state.user.syncFileList();
      render();
    }
  });

  emitter.on('password', async ({ password, file }) => {
    try {
      state.settingPassword = true;
      render();
      await file.setPassword(password);
      state.storage.writeFile(file);
      await delay(1000);
    } catch (err) {
      // eslint-disable-next-line no-console
      console.error(err);
      state.passwordSetError = err;
    } finally {
      state.settingPassword = false;
    }
    render();
  });

  emitter.on('getMetadata', async () => {
    const file = state.fileInfo;

    const receiver = new FileReceiver(file);
    try {
      await receiver.getMetadata();
      state.transfer = receiver;
    } catch (e) {
      if (e.message === '401' || e.message === '404') {
        file.password = null;
        if (!file.requiresPassword) {
          return emitter.emit('pushState', '/404');
        }
      }
    }

    render();
  });

  emitter.on('download', async file => {
    state.transfer.on('progress', updateProgress);
    state.transfer.on('decrypting', render);
    state.transfer.on('complete', render);
    const links = openLinksInNewTab();
    const size = file.size;
    const start = Date.now();
    try {
      const dl = state.transfer.download({
        stream: state.capabilities.streamDownload
      });
      render();
      await dl;
      state.storage.totalDownloads += 1;
      const duration = Date.now() - start;
      metrics.completedDownload({
        size,
        duration,
        password_protected: file.requiresPassword
      });
    } catch (err) {
      if (err.message === '0') {
        // download cancelled
        state.transfer.reset();
        render();
      } else {
        // eslint-disable-next-line no-console
        state.transfer = null;
        const location = err.message === '404' ? '/404' : '/error';
        if (location === '/error') {
          state.raven.captureException(err);
          const duration = Date.now() - start;
          metrics.stoppedDownload({
            size,
            duration,
            password_protected: file.requiresPassword
          });
        }
        emitter.emit('pushState', location);
      }
    } finally {
      openLinksInNewTab(links, false);
    }
  });

  emitter.on('copy', ({ url }) => {
    copyToClipboard(url);
    // metrics.copiedLink({ location });
  });

  setInterval(() => {
    // poll for updates of the upload list
    if (state.route === '/') {
      checkFiles();
    }
  }, 2 * 60 * 1000);

  setInterval(() => {
    // poll for rerendering the file list countdown timers
    if (
      state.route === '/' &&
      state.storage.files.length > 0 &&
      Date.now() - lastRender > 30000
    ) {
      render();
    }
  }, 60000);
}