import moment from "moment";
import React, { useEffect, useRef, useState } from "react";
import { useDispatch, useSelector } from "react-redux";
import { Link, useParams } from "react-router-dom";

import {
  activeLoader,
  filterCreatedByMe,
  filteredParticipateTasks,
  getBoarderLoader,
  getProjectBoard,
  modalToggle,
  moveProjectTask,
  setColumnId,
  setColumnName,
  setColumnPriority,
  setProjectBoardFetch,
  setToggleTab
} from "@redux/projectsTrackerSlice";

import { urlForLocal } from "@utils/helper";

import { apiRequest } from "@api/request";

import { useNotification } from "@hooks/useNotification";

import BaseButton from "@components/Common/BaseButton/BaseButton";
import { Footer } from "@components/Common/Footer/Footer";
import { Loader } from "@components/Common/Loader/Loader";
import AcceptModal from "@components/Modal/AcceptModal/AcceptModal";
import ListEmployees from "@components/Modal/Tracker/ListEmployees/ListEmployees";
import ModalTicket from "@components/Modal/Tracker/ModalTicket/ModalTicket";
import TrackerModal from "@components/Modal/Tracker/TrackerModal/TrackerModal";
import { Navigation } from "@components/Navigation/Navigation";
import { ProfileBreadcrumbs } from "@components/ProfileBreadcrumbs/ProfileBreadcrumbs";
import { ProfileHeader } from "@components/ProfileHeader/ProfileHeader";
import TrackerCardTask from "@components/TrackerCardTask/TrackerCardTask";
import TrackerSelectExecutor from "@components/TrackerSelectExecutor/TrackerSelectExecutor";
import TrackerTagList from "@components/TrackerTagList/TrackerTagList";

import arrow from "assets/icons/arrows/arrowRight.png";
import category from "assets/icons/category.svg";
import del from "assets/icons/delete.svg";
import edit from "assets/icons/edit.svg";
import trackerNoTasks from "assets/icons/trackerNoTasks.svg";
import project from "assets/icons/trackerProject.svg";
import tasks from "assets/icons/trackerTasks.svg";
import accept from "assets/images/accept.png";
import avatarMok from "assets/images/avatarMok.png";

export const ProjectTracker = () => {
  const dispatch = useDispatch();
  const projectId = useParams();

  const [openColumnSelect, setOpenColumnSelect] = useState({});
  const [selectedTab, setSelectedTab] = useState(0);
  const [priorityTask, setPriorityTask] = useState(0);
  const [wrapperHover, setWrapperHover] = useState({});
  const [modalAdd, setModalAdd] = useState(false);
  const [modalActiveTicket, setModalActiveTicket] = useState(false);
  const [selectedTicket, setSelectedTicket] = useState({});
  const [personListOpen, setPersonListOpen] = useState(false);
  const [acceptModalOpen, setAcceptModalOpen] = useState(false);
  const [currentColumnDelete, setCurrentColumnDelete] = useState(null);
  const [checkBoxParticipateTasks, setCheckBoxParticipateTasks] =
    useState(false);
  const [filteredNoTasks, setFilteredNoTasks] = useState(false);
  const [checkBoxMyTasks, setCheckBoxMyTasks] = useState(false);
  const [selectedExecutor, setSelectedExecutor] = useState(null);
  const startWrapperIndexTest = useRef({});
  const projectBoard = useSelector(getProjectBoard);
  const loader = useSelector(getBoarderLoader);
  const { showNotification } = useNotification();

  useEffect(() => {
    dispatch(activeLoader());
    dispatch(setProjectBoardFetch(projectId.id));
    initListeners();
  }, []);

  useEffect(() => {
    let columnsTasksEmpty = true;
    if (Object.keys(projectBoard).length) {
      projectBoard.columns.forEach((column) => {
        if (column.tasks.length) columnsTasksEmpty = false;
        setOpenColumnSelect((prevState) => ({
          ...prevState,
          [column.id]: false
        }));
      });
    }
    if (
      columnsTasksEmpty &&
      (checkBoxMyTasks || selectedExecutor || checkBoxParticipateTasks)
    ) {
      setFilteredNoTasks(true);
    } else {
      setFilteredNoTasks(false);
    }
  }, [projectBoard]);

  function dragOverHandler(e) {
    e.preventDefault();
  }

  function dragEnterHandler(columnId) {
    if (columnId === startWrapperIndexTest.current.index) {
      return;
    }

    setWrapperHover((prevState) => ({
      [prevState]: false,
      [columnId]: true
    }));
  }

  function dragDropHandler(e, columnId) {
    e.preventDefault();

    setWrapperHover((prevState) => ({
      [prevState]: false
    }));

    if (
      startWrapperIndexTest.current.index === columnId ||
      e.target.className.includes("__item")
    ) {
      return;
    }

    if (columnId !== startWrapperIndexTest.current.index) {
      dispatch(
        moveProjectTask({
          startWrapperIndex: startWrapperIndexTest.current,
          columnId
        })
      );
    }
  }

  function selectedTabTask(columnId, length) {
    setSelectedTab(columnId);
    dispatch(modalToggle("create-ticket-project"));
    setModalAdd(true);
    setPriorityTask(length);
  }

  function openTicket(e, task) {
    setSelectedTicket(task);
    setModalActiveTicket(true);
    document.body.style.overflow = "hidden";
  }

  function deleteColumn(column) {
    const priorityColumns = [];
    apiRequest("/project-column/update-column", {
      method: "PUT",
      data: {
        column_id: column.id,
        project_id: projectBoard.id,
        status: 0
      }
    }).then(() => {
      if (column.priority < projectBoard.columns.length) {
        for (let i = column.priority; i < projectBoard.columns.length; i++) {
          const currentColumn = {
            column_id: projectBoard.columns[i].id,
            priority: i
          };
          priorityColumns.push(currentColumn);
        }
        apiRequest("/project-column/set-priority", {
          method: "POST",
          data: {
            project_id: projectBoard.id,
            data: JSON.stringify(priorityColumns)
          }
        }).then(() => {
          dispatch(setProjectBoardFetch(projectBoard.id));
        });
      } else {
        dispatch(setProjectBoardFetch(projectBoard.id));
      }
      showNotification({
        show: true,
        text: "Колонка удалена",
        type: "error"
      });
    });
  }

  function filterParticipateTasks() {
    if (!checkBoxParticipateTasks) {
      dispatch(filteredParticipateTasks(Number(localStorage.getItem("id"))));
    } else {
      dispatch(setProjectBoardFetch(projectId.id));
      setCheckBoxParticipateTasks(false);
      setCheckBoxMyTasks(false);
      setSelectedExecutor(null);
    }
    setCheckBoxParticipateTasks(!checkBoxParticipateTasks);
  }

  function filterMyTask() {
    if (!checkBoxMyTasks) {
      dispatch(filterCreatedByMe(Number(localStorage.getItem("id"))));
    } else {
      dispatch(setProjectBoardFetch(projectId.id));
      setCheckBoxParticipateTasks(false);
      setCheckBoxMyTasks(false);
      setSelectedExecutor(null);
    }
    setCheckBoxMyTasks(!checkBoxMyTasks);
  }

  function deleteSelectedExecutorFilter() {
    setSelectedExecutor(null);
    setCheckBoxParticipateTasks(false);
    setCheckBoxMyTasks(false);
    dispatch(setProjectBoardFetch(projectId.id));
  }

  const initListeners = () => {
    document.addEventListener("click", closeByClickingOut);
  };

  const closeByClickingOut = (event) => {
    const path = event.path || (event.composedPath && event.composedPath());

    if (
      event &&
      !path.find(
        (div) =>
          div.classList &&
          (div.classList.contains("add-person") ||
            div.classList.contains("persons__list"))
      )
    ) {
      setPersonListOpen(false);
    }

    if (
      event &&
      !path.find(
        (div) =>
          div.classList &&
          (div.classList.contains("board__head__more") ||
            div.classList.contains("column__select"))
      )
    ) {
      setOpenColumnSelect((prevState) => {
        const newState = {};
        for (const key in prevState) {
          newState[key] = false;
        }
        return newState;
      });
    }
  };

  function closeAcceptModal() {
    setAcceptModalOpen(false);
  }

  return (
    <div className="tracker">
      <ProfileHeader />
      <Navigation />
      <div className="container">
        <div className="tracker__content">
          <ProfileBreadcrumbs
            links={[
              { name: "Главная", link: "/profile" },
              { name: "Трекер", link: "/profile/tracker" }
            ]}
          />
          <h2 className="tracker__title">Управление проектами с трекером</h2>
        </div>
      </div>
      <div className="tracker__tabs">
        <div className="tracker__tabs__head">
          <Link
            to="/profile/tracker"
            className="tab active-tab tab"
            onClick={() => dispatch(setToggleTab(1))}
          >
            <img src={project} alt="img" />
            <p>Проекты </p>
          </Link>
          <Link
            to="/profile/tracker"
            className="tab"
            onClick={() => dispatch(setToggleTab(2))}
          >
            <img src={tasks} alt="img" />
            <p>Все мои задачи</p>
          </Link>
        </div>
        <div className="tracker__tabs__content">
          <TrackerModal
            active={modalAdd}
            setActive={setModalAdd}
            selectedTab={selectedTab}
            priorityTask={priorityTask}
            projectUsers={projectBoard.projectUsers}
            projectMarks={projectBoard.mark}
          />

          {loader && <Loader style="green" />}
          {!loader && (
            <div className="tracker__tabs__content__tasks tasks active__content">
              <div className="tasks__head">
                <div className="tasks__head__wrapper">
                  <div className="tasks__head__title">
                    <img src={category}></img>
                    <h5>{projectBoard.name}</h5>
                  </div>
                  <div className="tasks__head__add">
                    <BaseButton
                      onClick={() => {
                        dispatch(modalToggle("create-column"));
                        setModalAdd(true);
                      }}
                      styles={"button-add-column"}
                    >
                      +
                    </BaseButton>

                    <p>добавить колонку</p>
                  </div>
                  <div
                    className={
                      projectBoard.projectUsers?.length
                        ? "tasks__head__persons"
                        : "tasks__head__persons no-project-users"
                    }
                  >
                    {Boolean(projectBoard.projectUsers?.length) && (
                      <div
                        className={
                          projectBoard.projectUsers?.length == 1
                            ? "one-person"
                            : "project-persons"
                        }
                      >
                        {projectBoard.projectUsers.slice(0, 3).map((person) => {
                          return (
                            <img
                              key={person.user_id}
                              src={
                                person.user?.avatar
                                  ? urlForLocal(person.user.avatar)
                                  : avatarMok
                              }
                              alt="avatar"
                            />
                          );
                        })}
                      </div>
                    )}
                    {projectBoard.projectUsers?.length > 3 && (
                      <span className="count-persons">
                        +{projectBoard.projectUsers?.length - 3}
                      </span>
                    )}
                    <span
                      className="add-person"
                      onClick={() => {
                        setPersonListOpen(true);
                      }}
                    >
                      +
                    </span>

                    <ListEmployees
                      active={personListOpen}
                      setActiveListEmpl={setPersonListOpen}
                      setModalAdd={setModalAdd}
                      projectBoard={projectBoard}
                    />
                  </div>
                  <div
                    className="tasks__head__checkBox"
                    onClick={filterParticipateTasks}
                  >
                    <span>Участвую</span>
                    <div className="tasks__head__checkBox__box">
                      {checkBoxParticipateTasks && (
                        <img src={accept} alt="accept" />
                      )}
                    </div>
                  </div>
                  <div className="tasks__head__checkBox" onClick={filterMyTask}>
                    <span>Мои</span>
                    <div className="tasks__head__checkBox__box">
                      {checkBoxMyTasks && <img src={accept} alt="accept" />}
                    </div>
                  </div>

                  <TrackerSelectExecutor
                    deleteSelectedExecutor={deleteSelectedExecutorFilter}
                    projectBoard={projectBoard}
                    selectedExecutor={selectedExecutor}
                    setSelectedExecutor={setSelectedExecutor}
                  />

                  <TrackerTagList projectBoard={projectBoard} />

                  <Link to="/profile/tracker" className="tasks__head__back">
                    <p>К списку проектов</p>
                    <img src={arrow} alt="arrow" />
                  </Link>
                </div>
              </div>

              {Boolean(modalActiveTicket) && (
                <ModalTicket
                  active={modalActiveTicket}
                  setActive={setModalActiveTicket}
                  task={selectedTicket}
                  projectId={projectBoard.id}
                  projectName={projectBoard.name}
                  projectUsers={projectBoard.projectUsers}
                  projectOwnerId={projectBoard.owner_id}
                  projectMarks={projectBoard.mark}
                />
              )}

              <div className="tasks__container">
                {Boolean(projectBoard?.columns) &&
                  !filteredNoTasks &&
                  Boolean(projectBoard.columns.length) &&
                  projectBoard.columns.map((column) => {
                    return (
                      <div
                        key={column.id}
                        onDragOver={(e) => dragOverHandler(e)}
                        onDragEnter={() => dragEnterHandler(column.id)}
                        onDrop={(e) => dragDropHandler(e, column.id)}
                        className={`tasks__board ${
                          wrapperHover[column.id] ? "tasks__board__hover" : ""
                        }`}
                      >
                        <div className="board__head">
                          <span>{column.title}</span>
                          <div className="board__head__more">
                            <span
                              className="add"
                              onClick={() => {
                                selectedTabTask(
                                  column.id,
                                  projectBoard?.columns && column.tasks.length
                                    ? column.tasks[0].priority - 1
                                    : 1
                                );
                              }}
                            >
                              +
                            </span>
                            <span
                              onClick={() => {
                                setOpenColumnSelect((prevState) => ({
                                  ...prevState,
                                  [column.id]: true
                                }));
                              }}
                              className="more"
                            >
                              ...
                            </span>
                          </div>
                        </div>
                        {openColumnSelect[column.id] && (
                          <div className="column__select">
                            <div
                              className="column__select__item"
                              onClick={() => {
                                setOpenColumnSelect((prevState) => ({
                                  ...prevState,
                                  [column.id]: false
                                }));
                                dispatch(modalToggle("edit-column"));
                                dispatch(setColumnName(column.title));
                                dispatch(setColumnId(column.id));
                                dispatch(setColumnPriority(column.priority));
                                setModalAdd(true);
                              }}
                            >
                              <img src={edit} alt="edit" />
                              <span>Изменить</span>
                            </div>
                            <div
                              className="column__select__item"
                              onClick={() => {
                                if (column.tasks.length) {
                                  setAcceptModalOpen(true);
                                  setCurrentColumnDelete(column);
                                } else {
                                  deleteColumn(column);
                                }
                              }}
                            >
                              <img src={del} alt="delete" />
                              <span>Удалить</span>
                            </div>
                          </div>
                        )}
                        <div className="tasks-container">
                          {column.tasks.map((task, index) => {
                            const dateDeadline = new Date(task.dead_line);
                            const currentDate = moment().format(
                              "YYYY-MM-DD HH:mm:ss"
                            );
                            const titleColor =
                              task.dead_line &&
                              dateDeadline < new Date(currentDate)
                                ? "red"
                                : "#1a1919";
                            return (
                              <TrackerCardTask
                                column={column}
                                key={index}
                                openTicket={openTicket}
                                projectBoard={projectBoard}
                                setWrapperHover={setWrapperHover}
                                startWrapperIndexTest={startWrapperIndexTest}
                                task={task}
                                titleColor={titleColor}
                              />
                            );
                          })}
                        </div>
                      </div>
                    );
                  })}
                {Boolean(projectBoard?.columns) &&
                  !Boolean(projectBoard.columns.length) && (
                    <div className="tasks__board__no-items">
                      В проекте нет задач.
                    </div>
                  )}
                {filteredNoTasks && (
                  <div className="tasks__board__no-tasks">
                    <div className="tasks__board__no-tasks-info">
                      <img src={trackerNoTasks} alt="no-tasks" />
                      <p>Пока нет подходящих задач</p>
                    </div>
                    <p className="tasks__board__no-tasks-more">
                      Ставьте задачи, следите за прогрессом, ведите учёт
                      рабочего времени
                    </p>
                  </div>
                )}
              </div>
            </div>
          )}
        </div>
      </div>
      {acceptModalOpen && (
        <AcceptModal
          title={
            "В колонке ещё есть задачи, Вы действительно хотите удалить её ?"
          }
          closeModal={closeAcceptModal}
          agreeHandler={() => deleteColumn(currentColumnDelete)}
        />
      )}
      <Footer />
    </div>
  );
};