// client.js
// Copyright (C) 2024 DTP Technologies, LLC
// All Rights Reserved

'use strict';

import mongoose from 'mongoose';
const Client = mongoose.model('Client');
const ClientProject = mongoose.model('ClientProject');

import { SiteService/*, SiteError*/ } from '../../lib/site-lib.js';

export default class ClientService extends SiteService {

  static get name ( ) { return 'ClientService'; }
  static get slug () { return 'client'; }

  constructor (dtp) {
    super(dtp, ClientService);
  }

  async start ( ) {
    const { user: userService } = this.dtp.services;

    this.populateClient = [
      {
        path: 'user',
        select: userService.USER_SELECT,
      },
    ];

    this.populateClientProject = [
      {
        path: 'user',
        select: userService.USER_SELECT,
      },
      {
        path: 'client',
        populate: this.populateClient,
      },
    ];
  }

  async createClient (user, clientDefinition) {
    const { text: textService } = this.dtp.services;

    const client = new Client();
    client.user = user._id;
    client.name = textService.filter(clientDefinition.name);
    if (clientDefinition.description && clientDefinition.description.length > 0) {
      client.description = textService.filter(clientDefinition.description);
    }
    client.hoursLimit = clientDefinition.hoursLimit;

    await client.save();

    return client.toObject();
  }

  async updateClient (client, clientDefinition) {
    const { text: textService } = this.dtp.services;
    const update = { $set: { }, $unset: { } };

    let changed = false;

    if (clientDefinition.name !== client.name) {
      update.$set.name = textService.filter(clientDefinition.name);
      changed = true;
    }

    if (clientDefinition.description && (clientDefinition.description.length > 0)) {
      if (clientDefinition.description !== client.description) {
        update.$set.description = textService.filter(clientDefinition.description);
        changed = true;
      }
    } else {
      update.$unset.description = 1;
      changed = true;
    }

    if (clientDefinition.hoursLimit !== client.hoursLimit) {
      update.$set.hoursLimit = clientDefinition.hoursLimit;
      changed = true;
    }

    if (!changed) {
      return;
    }

    await Client.updateOne({ _id: client._id }, update);
  }

  async getClientById (clientId) {
    const client = Client
      .findOne({ _id: clientId })
      .populate(this.populateClient)
      .lean();
    return client;
  }

  async getClientsForUser (user) {
    const clients = Client
      .find({ user: user._id })
      .sort({ name: 1 })
      .populate(this.populateClient)
      .lean();
    return clients;
  }

  async createProject (client, projectDefinition) {
    const { text: textService } = this.dtp.services;

    const project = new ClientProject();
    project.user = client.user._id;
    project.client = client._id;

    project.name = textService.filter(projectDefinition.name);
    if (projectDefinition.description && (projectDefinition.description.length > 0)) {
      project.description = textService.filter(projectDefinition.description);
    }

    project.hourlyRate = projectDefinition.hourlyRate;

    await project.save();

    return project.toObject();
  }

  async updateProject (project, projectDefinition) {
    const { text: textService } = this.dtp.services;
    const update = { $set: { }, $unset: { } };
    let changed = false;

    if (projectDefinition.name !== project.name) {
      update.$set.name = textService.filter(projectDefinition.name);
      changed = true;
    }
    if (projectDefinition.description !== project.description) {
      update.$set.description = textService.filter(projectDefinition.description);
      changed = true;
    }

    if (projectDefinition.hourlyRate !== project.hourlyRate) {
      update.$set.hourlyRate = projectDefinition.hourlyRate;
      changed = true;
    }

    if (!changed) {
      return;
    }

    await ClientProject.updateOne({ _id: project._id }, update);
  }

  async getProjectById (projectId) {
    const project = ClientProject
      .findOne({ _id: projectId })
      .populate(this.populateClientProject)
      .lean();
    return project;
  }

  async getProjectsForUser (user) {
    const projects = ClientProject
      .find({ user: user._id })
      .sort({ created: -1 })
      .populate(this.populateClientProject)
      .lean();
    return projects;
  }

  async getProjectsForClient (client) {
    const projects = ClientProject
      .find({ client: client._id })
      .sort({ created: -1 })
      .populate(this.populateClientProject)
      .lean();
    return projects;
  }

  async addTimeWorked (client, duration) {
    const { task: taskService } = this.dtp.services;

    const durationLimit = client.hoursLimit * 3600;
    if ((client.weeklyTotals.timeWorked + duration) > durationLimit) {
      this.log.alert('clamping time worked to weekly hours limit', {
        user: {
          _id: client.user._id,
          username: client.user.username,
        },
        client: {
          _id: client._id,
          hoursLimit: client.hoursLimit,
        },
      });
      await Client.updateOne(
        { _id: client._id },
        {
          $set: { 'weeklyTotals.timeWorked': durationLimit },
        },
      );

      this.log.alert('Ending work sessions for user due to hours limit reached', {
        user: {
          _id: client.user._id,
          username: client.user.username,
        },
        client: {
          _id: client._id,
          hoursLimit: client.hoursLimit,
        },
      });
      await taskService.closeTaskSessionForUser(client.user);

      const displayList = this.createDisplayList('session-control');
      displayList.showNotification(
        'Hours limit reached. The task work session has been closed.',
        'danger',
        'bottom-center',
        5000,
      );

      this.dtp.emitter
        .to(client.user._id.toString())
        .emit('session-control', {
          cmd: 'end-session',
          displayList,
        });

      return;
    }

    this.log.info('adding time worked to client weekly totals', {
      user: {
        _id: client.user._id,
        username: client.user.username,
      },
      client: {
        _id: client._id,
        hoursLimit: client.hoursLimit,
        currentHours: client.weeklyTotals.timeWorked / 3600,
      },
      hours: duration / 3600,
    });
    await Client.updateOne(
      { _id: client._id },
      {
        $inc: { 'weeklyTotals.timeWorked': duration },
      },
    );
  }
}