// @flow
import crypto from 'crypto';
import * as db from '../common/database';
import type { BaseModel } from './index';

export const name = 'Cookie Jar';
export const type = 'CookieJar';
export const prefix = 'jar';
export const canDuplicate = true;
export const canSync = false;

export type Cookie = {
  id: string,
  key: string,
  value: string,
  expires: Date | string | number | null,
  domain: string,
  path: string,
  secure: boolean,
  httpOnly: boolean,

  extensions?: Array<any>,
  creation?: Date,
  creationIndex?: number,
  hostOnly?: boolean,
  pathIsDefault?: boolean,
  lastAccessed?: Date,
};

type BaseCookieJar = {
  name: string,
  cookies: Array<Cookie>,
};

export type CookieJar = BaseModel & BaseCookieJar;

export function init() {
  return {
    name: 'Default Jar',
    cookies: [],
  };
}

export function migrate(doc: CookieJar): CookieJar {
  doc = migrateCookieId(doc);
  return doc;
}

export async function create(patch: Object = {}) {
  if (!patch.parentId) {
    throw new Error(`New CookieJar missing \`parentId\`: ${JSON.stringify(patch)}`);
  }

  return db.docCreate(type, patch);
}

export async function getOrCreateForParentId(parentId: string) {
  const cookieJars = await db.find(type, { parentId });
  if (cookieJars.length === 0) {
    return create({
      parentId,

      // Deterministic ID. It helps reduce sync complexity since we won't have to
      // de-duplicate environments.
      _id: `${prefix}_${crypto
        .createHash('sha1')
        .update(parentId)
        .digest('hex')}`,
    });
  } else {
    return cookieJars[0];
  }
}

export async function all(): Promise<Array<BaseModel>> {
  return db.all(type);
}

export async function getById(id: string) {
  return db.get(type, id);
}

export async function update(cookieJar: CookieJar, patch: Object = {}) {
  return db.docUpdate(cookieJar, patch);
}

/** Ensure every cookie has an ID property */
function migrateCookieId(cookieJar: CookieJar) {
  for (const cookie of cookieJar.cookies) {
    if (!cookie.id) {
      cookie.id = Math.random()
        .toString()
        .replace('0.', '');
    }
  }
  return cookieJar;
}