/* eslint global-require: 0*/
import _ from 'underscore';
import {
  Thread,
  Actions,
  Message,
  TaskFactory,
  DatabaseStore,
  FocusedPerspectiveStore,
} from 'mailspring-exports';

export default class ThreadListContextMenu {
  constructor({ threadIds = [], accountIds = [] }) {
    this.threadIds = threadIds;
    this.accountIds = accountIds;
  }

  menuItemTemplate() {
    return DatabaseStore.modelify(Thread, this.threadIds)
      .then(threads => {
        this.threads = threads;

        return Promise.all([
          this.replyItem(),
          this.replyAllItem(),
          this.forwardItem(),
          { type: 'separator' },
          this.archiveItem(),
          this.trashItem(),
          this.markAsReadItem(),
          this.starItem(),
        ]);
      })
      .then(menuItems => {
        return _.filter(_.compact(menuItems), (item, index) => {
          if ((index === 0 || index === menuItems.length - 1) && item.type === 'separator') {
            return false;
          }
          return true;
        });
      });
  }

  replyItem() {
    if (this.threadIds.length !== 1) {
      return null;
    }
    return {
      label: 'Reply',
      click: () => {
        Actions.composeReply({
          threadId: this.threadIds[0],
          popout: true,
          type: 'reply',
          behavior: 'prefer-existing-if-pristine',
        });
      },
    };
  }

  replyAllItem() {
    if (this.threadIds.length !== 1) {
      return null;
    }

    return DatabaseStore.findBy(Message, { threadId: this.threadIds[0] })
      .order(Message.attributes.date.descending())
      .limit(1)
      .then(message => {
        if (message && message.canReplyAll()) {
          return {
            label: 'Reply All',
            click: () => {
              Actions.composeReply({
                threadId: this.threadIds[0],
                popout: true,
                type: 'reply-all',
                behavior: 'prefer-existing-if-pristine',
              });
            },
          };
        }
        return null;
      });
  }

  forwardItem() {
    if (this.threadIds.length !== 1) {
      return null;
    }
    return {
      label: 'Forward',
      click: () => {
        Actions.composeForward({ threadId: this.threadIds[0], popout: true });
      },
    };
  }

  archiveItem() {
    const perspective = FocusedPerspectiveStore.current();
    const allowed = perspective.canArchiveThreads(this.threads);
    if (!allowed) {
      return null;
    }
    return {
      label: 'Archive',
      click: () => {
        const tasks = TaskFactory.tasksForArchiving({
          source: 'Context Menu: Thread List',
          threads: this.threads,
        });
        Actions.queueTasks(tasks);
      },
    };
  }

  trashItem() {
    const perspective = FocusedPerspectiveStore.current();
    const allowed = perspective.canMoveThreadsTo(this.threads, 'trash');
    if (!allowed) {
      return null;
    }
    return {
      label: 'Trash',
      click: () => {
        const tasks = TaskFactory.tasksForMovingToTrash({
          source: 'Context Menu: Thread List',
          threads: this.threads,
        });
        Actions.queueTasks(tasks);
      },
    };
  }

  markAsReadItem() {
    const unread = this.threads.every(t => t.unread === false);
    const dir = unread ? 'Unread' : 'Read';

    return {
      label: `Mark as ${dir}`,
      click: () => {
        Actions.queueTask(
          TaskFactory.taskForInvertingUnread({
            source: 'Context Menu: Thread List',
            threads: this.threads,
          })
        );
      },
    };
  }

  starItem() {
    const starred = this.threads.every(t => t.starred === false);

    let dir = '';
    let star = 'Star';
    if (!starred) {
      dir = 'Remove ';
      star = this.threadIds.length > 1 ? 'Stars' : 'Star';
    }

    return {
      label: `${dir}${star}`,
      click: () => {
        Actions.queueTask(
          TaskFactory.taskForInvertingStarred({
            source: 'Context Menu: Thread List',
            threads: this.threads,
          })
        );
      },
    };
  }

  displayMenu() {
    const { remote } = require('electron');
    this.menuItemTemplate().then(template => {
      remote.Menu.buildFromTemplate(template).popup(remote.getCurrentWindow());
    });
  }
}