// @flow
import Router from "koa-router";
import userDestroyer from "../../commands/userDestroyer";
import userInviter from "../../commands/userInviter";
import userSuspender from "../../commands/userSuspender";
import auth from "../../middlewares/authentication";
import { Event, User, Team } from "../../models";
import policy from "../../policies";
import { presentUser, presentPolicies } from "../../presenters";
import { Op } from "../../sequelize";
import pagination from "./middlewares/pagination";

const { can, authorize } = policy;
const router = new Router();

router.post("users.list", auth(), pagination(), async (ctx) => {
  let { sort = "createdAt", query, direction, filter } = ctx.body;
  if (direction !== "ASC") direction = "DESC";
  ctx.assertSort(sort, User);

  if (filter) {
    ctx.assertIn(filter, [
      "invited",
      "viewers",
      "admins",
      "active",
      "all",
      "suspended",
    ]);
  }

  const actor = ctx.state.user;

  let where = {
    teamId: actor.teamId,
  };

  switch (filter) {
    case "invited": {
      where = { ...where, lastActiveAt: null };
      break;
    }
    case "viewers": {
      where = { ...where, isViewer: true };
      break;
    }
    case "admins": {
      where = { ...where, isAdmin: true };
      break;
    }
    case "suspended": {
      where = { ...where, suspendedAt: { [Op.ne]: null } };
      break;
    }
    case "all": {
      break;
    }
    default: {
      where = { ...where, suspendedAt: { [Op.eq]: null } };
      break;
    }
  }

  if (query) {
    where = {
      ...where,
      name: {
        [Op.iLike]: `%${query}%`,
      },
    };
  }

  const [users, total] = await Promise.all([
    User.findAll({
      where,
      order: [[sort, direction]],
      offset: ctx.state.pagination.offset,
      limit: ctx.state.pagination.limit,
    }),
    User.count({
      where,
    }),
  ]);

  ctx.body = {
    pagination: {
      ...ctx.state.pagination,
      total,
    },
    data: users.map((user) =>
      presentUser(user, { includeDetails: can(actor, "readDetails", user) })
    ),
    policies: presentPolicies(actor, users),
  };
});

router.post("users.count", auth(), async (ctx) => {
  const { user } = ctx.state;
  const counts = await User.getCounts(user.teamId);

  ctx.body = {
    data: {
      counts,
    },
  };
});

router.post("users.info", auth(), async (ctx) => {
  const { id } = ctx.body;
  const actor = ctx.state.user;

  const user = id ? await User.findByPk(id) : actor;
  authorize(actor, "read", user);

  const includeDetails = can(actor, "readDetails", user);

  ctx.body = {
    data: presentUser(user, { includeDetails }),
    policies: presentPolicies(actor, [user]),
  };
});

router.post("users.update", auth(), async (ctx) => {
  const { user } = ctx.state;
  const { name, avatarUrl, language } = ctx.body;

  if (name) user.name = name;
  if (avatarUrl) user.avatarUrl = avatarUrl;
  if (language) user.language = language;

  await user.save();

  await Event.create({
    name: "users.update",
    actorId: user.id,
    userId: user.id,
    teamId: user.teamId,
    ip: ctx.request.ip,
  });

  ctx.body = {
    data: presentUser(user, { includeDetails: true }),
  };
});

// Admin specific

router.post("users.promote", auth(), async (ctx) => {
  const userId = ctx.body.id;
  const teamId = ctx.state.user.teamId;
  const actor = ctx.state.user;
  ctx.assertPresent(userId, "id is required");

  const user = await User.findByPk(userId);
  authorize(actor, "promote", user);

  await user.promote();

  await Event.create({
    name: "users.promote",
    actorId: actor.id,
    userId,
    teamId,
    data: { name: user.name },
    ip: ctx.request.ip,
  });

  const includeDetails = can(actor, "readDetails", user);

  ctx.body = {
    data: presentUser(user, { includeDetails }),
    policies: presentPolicies(actor, [user]),
  };
});

router.post("users.demote", auth(), async (ctx) => {
  const userId = ctx.body.id;
  const teamId = ctx.state.user.teamId;
  let { to } = ctx.body;

  const actor = ctx.state.user;
  ctx.assertPresent(userId, "id is required");

  to = to === "viewer" ? "viewer" : "member";

  const user = await User.findByPk(userId);

  authorize(actor, "demote", user);

  await user.demote(teamId, to);

  await Event.create({
    name: "users.demote",
    actorId: actor.id,
    userId,
    teamId,
    data: { name: user.name },
    ip: ctx.request.ip,
  });

  const includeDetails = can(actor, "readDetails", user);

  ctx.body = {
    data: presentUser(user, { includeDetails }),
    policies: presentPolicies(actor, [user]),
  };
});

router.post("users.suspend", auth(), async (ctx) => {
  const userId = ctx.body.id;
  const actor = ctx.state.user;
  ctx.assertPresent(userId, "id is required");

  const user = await User.findByPk(userId);
  authorize(actor, "suspend", user);

  await userSuspender({
    user,
    actorId: actor.id,
    ip: ctx.request.ip,
  });

  const includeDetails = can(actor, "readDetails", user);

  ctx.body = {
    data: presentUser(user, { includeDetails }),
    policies: presentPolicies(actor, [user]),
  };
});

router.post("users.activate", auth(), async (ctx) => {
  const userId = ctx.body.id;
  const teamId = ctx.state.user.teamId;
  const actor = ctx.state.user;
  ctx.assertPresent(userId, "id is required");

  const user = await User.findByPk(userId);
  authorize(actor, "activate", user);

  await user.activate();

  await Event.create({
    name: "users.activate",
    actorId: actor.id,
    userId,
    teamId,
    data: { name: user.name },
    ip: ctx.request.ip,
  });

  const includeDetails = can(actor, "readDetails", user);

  ctx.body = {
    data: presentUser(user, { includeDetails }),
    policies: presentPolicies(actor, [user]),
  };
});

router.post("users.invite", auth(), async (ctx) => {
  const { invites } = ctx.body;
  ctx.assertArray(invites, "invites must be an array");

  const { user } = ctx.state;
  const team = await Team.findByPk(user.teamId);
  authorize(user, "inviteUser", team);

  const response = await userInviter({ user, invites, ip: ctx.request.ip });

  ctx.body = {
    data: {
      sent: response.sent,
      users: response.users.map((user) => presentUser(user)),
    },
  };
});

router.post("users.delete", auth(), async (ctx) => {
  const { confirmation, id } = ctx.body;
  ctx.assertPresent(confirmation, "confirmation is required");

  const actor = ctx.state.user;
  let user = actor;
  if (id) {
    user = await User.findByPk(id);
  }

  authorize(actor, "delete", user);

  await userDestroyer({
    user,
    actor,
    ip: ctx.request.ip,
  });

  ctx.body = {
    success: true,
  };
});

export default router;