import {
  Button,
  Container,
  Header,
  Icon,
  Label,
  Message,
  Segment,
  Table,
} from 'semantic-ui-react';
/* eslint-disable no-nested-ternary */
import React, { Component } from 'react';
import {
  addTask,
  deleteTask,
  getDocuments,
  getProfiles,
  getSolutions,
  getTasks,
  setSelectedTask,
} from '../../actions/homework';

import AddSolutionForm from '../forms/AddSolutionForm';
import AddTaskForm from '../forms/AddTaskForm';
import ConfirmModal from '../forms/ConfirmModal';
import EditTaskForm from '../forms/EditTaskForm';
import InfoModal from '../forms/InfoModal';
import SolutionDetailsForm from '../forms/SolutionDetailsForm';
import { connect } from 'react-redux';
import moment from 'moment';

// Display type for the Table Semantic UI component
// {icon} {text} - Displayed for the student for each Task
// {rowstyle} - Table row style (red text, yellow bg, ...)
const displayTypes = {
  can_submit: {
    text: 'Beadható',
    icon: 'send',
    rowstyle: { warning: false, positive: false, negative: false },
  },
  no_submit: {
    text: 'Beadás elmaradt',
    icon: 'warning circle',
    rowstyle: { warning: true, positive: false, negative: false },
  },
  wait_correction: {
    text: 'Javításra vár',
    icon: 'wait',
    rowstyle: { warning: true, positive: false, negative: false },
  },
  no_accept: {
    text: 'Nem elfogadható',
    icon: 'warning circle',
    rowstyle: { warning: false, positive: false, negative: true },
  },
  accepted: {
    text: 'Elfogadva',
    icon: 'checkmark',
    rowstyle: { warning: false, positive: true, negative: false },
  },
};

export const customMessage = (header, text, marginBottom, warning) => (
  <Message
    style={{ marginBottom }}
    icon={warning ? 'warning' : 'info'}
    info
    warning={warning}
    header={header}
    content={text}
  />
);

class Homework extends Component {
  componentDidMount() {
    this.props.getTasks();
    this.props.getProfiles();
    this.props.getSolutions();
    this.props.getDocuments();
  }

  // Returns a table style for the given task
  getTaskDisplayStyle(task) {
    const taskSolution = this.props.homeworks.solutions.filter(
      (solution) => solution.task === task.id
    );

    if (taskSolution.length === 0) {
      if (moment().isBefore(task.deadline)) {
        return 'can_submit';
      }

      return 'no_submit';
    }

    if (taskSolution[0].corrected === false) {
      return 'wait_correction';
    }

    if (taskSolution[0].accepted === false) {
      return 'no_accept';
    }

    return 'accepted';
  }

  // Returns table rows for the tasks
  // given parameters separates the active/inactive tasks and normal/staff users
  renderTaskList(active, staff) {
    const { user, homeworks } = this.props;
    const profileSolutions = homeworks.solutions.filter(
      (solution) => solution.created_by === user.id
    );

    // Normal user
    if (!staff) {
      return homeworks.tasks
        .filter((task) => moment().isBefore(task.deadline) === active)
        .map((task) => (
          // Style
          <Table.Row
            key={task.id}
            warning={
              displayTypes[this.getTaskDisplayStyle(task)].rowstyle.warning
            }
            positive={
              displayTypes[this.getTaskDisplayStyle(task)].rowstyle.positive
            }
            negative={
              displayTypes[this.getTaskDisplayStyle(task)].rowstyle.negative
            }
          >
            {/* Form component */}
            <Table.Cell>
              <AddSolutionForm
                taskid={task.id}
                tasktitle={task.title}
                taskdesc={task.text}
                multiple={this.getTaskDisplayStyle(task) !== 'can_submit'}
                disabled={moment().isAfter(task.deadline)}
              />
            </Table.Cell>
            {/* Deadline Date */}
            <Table.Cell>
              {moment(task.deadline).format('YYYY. MM. DD. HH:mm')}
            </Table.Cell>

            <Table.Cell>
              <Label
                color={
                  displayTypes[this.getTaskDisplayStyle(task)].rowstyle.positive
                    ? 'green'
                    : moment().isAfter(task.deadline)
                    ? 'red'
                    : displayTypes[this.getTaskDisplayStyle(task)].rowstyle
                        .negative
                    ? 'red'
                    : null
                }
              >
                {task.bits} bit
              </Label>
            </Table.Cell>
            {/* Status (Javításra vár, ...) */}
            <Table.Cell>
              <Icon name={displayTypes[this.getTaskDisplayStyle(task)].icon} />{' '}
              {displayTypes[this.getTaskDisplayStyle(task)].text}
              {profileSolutions.filter(
                (solution) => solution.task === task.id
              ) &&
              profileSolutions
                .filter((solution) => solution.task === task.id)
                .slice(-1)[0] &&
              profileSolutions
                .filter((solution) => solution.task === task.id)
                .slice(-1)[0].note ? (
                <div>
                  <InfoModal
                    button={
                      <button type="button" id="tasknote">
                        (Megjegyzés <Icon name="external" />)
                      </button>
                    }
                    title="Megjegyzés a feladathoz"
                    content={
                      profileSolutions
                        .filter((solution) => solution.task === task.id)
                        .slice(-1)[0].note
                    }
                    onAccept={() => {}}
                  />
                </div>
              ) : (
                ''
              )}
            </Table.Cell>
          </Table.Row>
        ));
    }

    // Staff

    const deleteButton = (
      <Button inverted style={{ marginRight: '2em' }} color="red">
        <Icon name="x" /> Törlés
      </Button>
    );

    return this.props.homeworks.tasks
      .filter((task) => moment().isBefore(task.deadline) === active)
      .map((task) => (
        <Table.Row
          key={task.id}
          warning={
            displayTypes[this.getTaskDisplayStyle(task)].rowstyle.warning
          }
          positive={
            displayTypes[this.getTaskDisplayStyle(task)].rowstyle.positive
          }
          negative={
            displayTypes[this.getTaskDisplayStyle(task)].rowstyle.negative
          }
        >
          {/* Form */}
          <Table.Cell>
            <SolutionDetailsForm
              taskid={task.id}
              tasktitle={task.title}
              taskdesc={task.text}
            />
          </Table.Cell>
          {/* Deadline Date */}
          <Table.Cell>
            {moment(task.deadline).format('YYYY. MM. DD. HH:mm')}
          </Table.Cell>
          {/* Bits */}
          <Table.Cell>
            <Label color={null}>{task.bits} bit</Label>
          </Table.Cell>
          {/* Admin buttons */}
          <Table.Cell>
            <EditTaskForm onClick={() => this.props.setSelectedTask(task)} />
            <ConfirmModal
              button={deleteButton}
              text="törlöd a kiválaszott feladatot a már beadott megoldásokkal együtt"
              onAccept={() => this.props.deleteTask(task)}
            />
          </Table.Cell>
        </Table.Row>
      ));
  }

  // Active/Inactive tasks table
  renderHomeworksTable(active, staff) {
    let tableColor = 'green';
    let marginBottom = '0em';

    if (!active) {
      tableColor = 'blue';
      marginBottom = '3em';
    }

    if (!staff) {
      return (
        <Table color={tableColor} fixed style={{ marginBottom }}>
          <Table.Header>
            <Table.Row>
              <Table.HeaderCell>
                <Icon circular name="home" />
                Feladat megnevezése / beadása
              </Table.HeaderCell>
              <Table.HeaderCell>
                <Icon circular name="calendar" />
                Beadási határidő
              </Table.HeaderCell>
              <Table.HeaderCell width={2}></Table.HeaderCell>
              <Table.HeaderCell>
                <Icon circular name="tasks" />
                Állapot
              </Table.HeaderCell>
            </Table.Row>
          </Table.Header>
          <Table.Body>{this.renderTaskList(active, staff)}</Table.Body>
        </Table>
      );
    }
    return (
      <Table color={tableColor} fixed style={{ marginBottom }}>
        <Table.Header>
          <Table.Row>
            <Table.HeaderCell>
              <Icon circular name="home" />
              Feladat megnevezése / Beadások állapota
            </Table.HeaderCell>
            <Table.HeaderCell>
              <Icon circular name="calendar" />
              Beadási határidő
            </Table.HeaderCell>
            <Table.HeaderCell width={2}></Table.HeaderCell>
            <Table.HeaderCell>
              <Icon circular name="edit" />
              Módosítás / Törlés
            </Table.HeaderCell>
          </Table.Row>
        </Table.Header>
        <Table.Body>{this.renderTaskList(active, staff)}</Table.Body>
      </Table>
    );
  }

  // Headers and stuff around the Tables
  renderHomeworks(active, staff) {
    let noTask = false;
    let noTaskText = 'Jelenleg nincs egyetlen beadható feladat sem. ';
    let marginBottom = '0em';
    const noTaskHeaderText = 'Nincs feladat.';
    let headerText = 'Aktív feladatok';

    if (staff) {
      headerText = 'Aktív feladatok kijavítása, módosítása vagy törlése';
    }

    if (
      this.props.homeworks.tasks.filter(
        (task) => moment().isBefore(task.deadline) === active
      ).length === 0
    ) {
      noTask = true;
    }

    if (!active) {
      if (staff) {
        headerText =
          'Lejárt határidejű feladatok kijavítása, módosítása vagy törlése';
      } else {
        headerText = 'Lejárt határidejű feladatok';
      }
      noTaskText = 'Jelenleg nincs egyetlen lejárt határidejű feladat sem.';
      marginBottom = '3em';
    }

    return (
      <Segment style={{ padding: '0 0 2em 0' }} vertical basic>
        <Container>
          <Header
            as="h1"
            dividing
            content={headerText}
            style={{
              fontSize: '2em',
              fontWeight: 'normal',
              marginBottom: 0,
              marginTop: '0.5em',
            }}
          />
          {noTask ? (
            customMessage(noTaskHeaderText, noTaskText, marginBottom, false)
          ) : (
            <div>{this.renderHomeworksTable(active, staff)}</div>
          )}
          {!active && !staff ? (
            <Header
              as="h3"
              content={
                <div>
                  Jelenlegi bitjeid száma:
                  <Label color="green" size="large">
                    {this.props.user.bits} bit
                  </Label>
                </div>
              }
              style={{
                fontWeight: 'normal',
                marginTop: '0.5em',
                marginBottom: '1em',
              }}
              textAlign="right"
            />
          ) : null}
        </Container>
      </Segment>
    );
  }

  render() {
    const { user } = this.props;

    if (user.role === 'Student') {
      return (
        <div style={{ paddingBottom: '2em' }}>
          {this.renderHomeworks(true, false)}
          {this.renderHomeworks(false, false)}
        </div>
      );
    }
    if (user.role === 'Staff') {
      return (
        <div style={{ paddingBottom: '2em' }}>
          <Segment style={{ padding: '0 0 2em 0' }} vertical basic>
            <Container>
              <Header
                dividing
                as="h1"
                content="Új házi feladat létrehozása"
                style={{
                  fontSize: '2em',
                  fontWeight: 'normal',
                  marginBottom: '0.5em',
                  marginTop: '0.5em',
                }}
              />
              <Button.Group>
                <AddTaskForm />
              </Button.Group>
            </Container>
          </Segment>
          {this.renderHomeworks(true, true)}
          {this.renderHomeworks(false, true)}
        </div>
      );
    }
    return null; // ¯\_(ツ)_/¯
  }
}

const mapStateToProps = ({ selectedTask, homeworks, user }) => ({
  selectedTask,
  homeworks,
  user,
});

export default connect(mapStateToProps, {
  getTasks,
  setSelectedTask,
  getSolutions,
  getDocuments,
  addTask,
  deleteTask,
  getProfiles,
})(Homework);