// @flow
import uuid from 'uuid';
import { URL } from 'url';
import fs from 'fs';
import util from 'util';
import path from 'path';
import { DataTypes, sequelize, Op } from '../sequelize';
import { publicS3Endpoint, uploadToS3FromUrl } from '../utils/s3';
import {
  stripSubdomain,
  RESERVED_SUBDOMAINS,
} from '../../shared/utils/domains';
import { ValidationError } from '../errors';

import Collection from './Collection';
import Document from './Document';
import User from './User';

const readFile = util.promisify(fs.readFile);

const Team = sequelize.define(
  'team',
  {
    id: {
      type: DataTypes.UUID,
      defaultValue: DataTypes.UUIDV4,
      primaryKey: true,
    },
    name: DataTypes.STRING,
    subdomain: {
      type: DataTypes.STRING,
      allowNull: true,
      validate: {
        isLowercase: true,
        is: {
          args: [/^[a-z\d-]+$/, 'i'],
          msg: 'Must be only alphanumeric and dashes',
        },
        len: {
          args: [4, 32],
          msg: 'Must be between 4 and 32 characters',
        },
        notIn: {
          args: [RESERVED_SUBDOMAINS],
          msg: 'You chose a restricted word, please try another.',
        },
      },
      unique: true,
    },
    slackId: { type: DataTypes.STRING, allowNull: true },
    googleId: { type: DataTypes.STRING, allowNull: true },
    avatarUrl: { type: DataTypes.STRING, allowNull: true },
    sharing: { type: DataTypes.BOOLEAN, allowNull: false, defaultValue: true },
    guestSignin: {
      type: DataTypes.BOOLEAN,
      allowNull: false,
      defaultValue: true,
    },
    documentEmbeds: {
      type: DataTypes.BOOLEAN,
      allowNull: false,
      defaultValue: true,
    },
    slackData: DataTypes.JSONB,
  },
  {
    getterMethods: {
      url() {
        if (!this.subdomain || process.env.SUBDOMAINS_ENABLED !== 'true') {
          return process.env.URL;
        }

        const url = new URL(process.env.URL);
        url.host = `${this.subdomain}.${stripSubdomain(url.host)}`;
        return url.href.replace(/\/$/, '');
      },
      logoUrl() {
        return (
          this.avatarUrl || (this.slackData ? this.slackData.image_88 : null)
        );
      },
    },
  }
);

Team.associate = models => {
  Team.hasMany(models.Collection, { as: 'collections' });
  Team.hasMany(models.Document, { as: 'documents' });
  Team.hasMany(models.User, { as: 'users' });
};

const uploadAvatar = async model => {
  const endpoint = publicS3Endpoint();
  const { avatarUrl } = model;

  if (
    avatarUrl &&
    !avatarUrl.startsWith('/api') &&
    !avatarUrl.startsWith(endpoint)
  ) {
    try {
      const newUrl = await uploadToS3FromUrl(
        avatarUrl,
        `avatars/${model.id}/${uuid.v4()}`,
        'public-read'
      );
      if (newUrl) model.avatarUrl = newUrl;
    } catch (err) {
      // we can try again next time
      console.error(err);
    }
  }
};

Team.prototype.provisionSubdomain = async function(subdomain) {
  if (this.subdomain) return this.subdomain;

  let append = 0;
  while (true) {
    try {
      await this.update({ subdomain });
      break;
    } catch (err) {
      // subdomain was invalid or already used, try again
      subdomain = `${subdomain}${++append}`;
    }
  }

  return subdomain;
};

Team.prototype.provisionFirstCollection = async function(userId) {
  const collection = await Collection.create({
    name: 'Welcome',
    description:
      'This collection is a quick guide to what Outline is all about. Feel free to delete this collection once your team is up to speed with the basics!',
    type: 'atlas',
    teamId: this.id,
    creatorId: userId,
  });

  // For the first collection we go ahead and create some intitial documents to get
  // the team started. You can edit these in /server/onboarding/x.md
  const onboardingDocs = [
    '❤️ Support',
    '🚀 Integrations & API',
    '📝 Our Editor',
    '👋 What is Outline',
  ];
  for (const title of onboardingDocs) {
    const text = await readFile(
      path.join(__dirname, '..', 'onboarding', `${title}.md`),
      'utf8'
    );
    const document = await Document.create({
      version: 1,
      isWelcome: true,
      parentDocumentId: null,
      collectionId: collection.id,
      teamId: collection.teamId,
      userId: collection.creatorId,
      lastModifiedById: collection.creatorId,
      createdById: collection.creatorId,
      title,
      text,
    });
    await document.publish();
  }
};

Team.prototype.addAdmin = async function(user: User) {
  return user.update({ isAdmin: true });
};

Team.prototype.removeAdmin = async function(user: User) {
  const res = await User.findAndCountAll({
    where: {
      teamId: this.id,
      isAdmin: true,
      id: {
        [Op.ne]: user.id,
      },
    },
    limit: 1,
  });
  if (res.count >= 1) {
    return user.update({ isAdmin: false });
  } else {
    throw new ValidationError('At least one admin is required');
  }
};

Team.prototype.suspendUser = async function(user: User, admin: User) {
  if (user.id === admin.id)
    throw new ValidationError('Unable to suspend the current user');
  return user.update({
    suspendedById: admin.id,
    suspendedAt: new Date(),
  });
};

Team.prototype.activateUser = async function(user: User, admin: User) {
  return user.update({
    suspendedById: null,
    suspendedAt: null,
  });
};

Team.prototype.collectionIds = async function(paranoid: boolean = true) {
  let models = await Collection.findAll({
    attributes: ['id', 'private'],
    where: { teamId: this.id, private: false },
    paranoid,
  });
  return models.map(c => c.id);
};

Team.beforeSave(uploadAvatar);

export default Team;