import { type FC, useState } from "react";
import TaskDetailAttachmentPopover from "./attachment/TaskDetailAttachmentPopover";
import { DEFAULT_DATE_RANGE } from "./date/constants";
import TaskDetailDatePopover from "./date/TaskDetailDatePopover";
import type DateObject from "react-date-object";
import { DEFAULT_CHECKLISTS } from "./checklist/constants";
import TaskDetailChecklistPopover from "./checklist/TaskDetailChecklistPopover";
import type { TaskChecklist } from "./checklist/types";
import { DEFAULT_LABELS } from "./labels/constants";
import TaskDetailLabelsPopover from "./labels/TaskDetailLabelsPopover";
import type { LabelsView, TaskLabel } from "./labels/types";
import TaskDetailActionBar from "./TaskDetailActionBar";
import TaskDetailMetadataPreview from "./TaskDetailMetadataPreview";
import type { TaskDetailTab } from "./types";
import { DEFAULT_USERS } from "./users/constants";
import TaskDetailUsersPopover from "./users/TaskDetailUsersPopover";

type Props = {
  activeTab: TaskDetailTab | null;
  onTabChange: (tab: TaskDetailTab) => void;
};

const TaskDetailToolbar: FC<Props> = ({ activeTab, onTabChange }) => {
  const [labelsView, setLabelsView] = useState<LabelsView>("list");
  const [labels, setLabels] = useState<TaskLabel[]>(DEFAULT_LABELS);
  const [selectedLabelIds, setSelectedLabelIds] = useState<Set<string>>(new Set(["1"]));
  const [selectedUserIds, setSelectedUserIds] = useState<Set<string>>(new Set(["1"]));
  const [checklists, setChecklists] = useState<TaskChecklist[]>(DEFAULT_CHECKLISTS);
  const [startDate, setStartDate] = useState<DateObject | null>(DEFAULT_DATE_RANGE.startDate);
  const [endDate, setEndDate] = useState<DateObject | null>(DEFAULT_DATE_RANGE.endDate);

  const selectedLabels = labels.filter((label) => selectedLabelIds.has(label.id));
  const selectedUsers = DEFAULT_USERS.filter((user) => selectedUserIds.has(user.id));
  const isLabelsOpen = activeTab === "labels";
  const isUsersOpen = activeTab === "users";
  const isChecklistOpen = activeTab === "checklist";
  const isAttachmentOpen = activeTab === "attachment";
  const isDateOpen = activeTab === "date";

  const handleTabChange = (tab: TaskDetailTab) => {
    if (tab === "labels" && activeTab !== "labels") {
      setLabelsView("list");
    }
    onTabChange(tab);
  };

  const handleLabelToggle = (id: string) => {
    setSelectedLabelIds((prev) => {
      const next = new Set(prev);
      if (next.has(id)) {
        next.delete(id);
      } else {
        next.add(id);
      }
      return next;
    });
  };

  const handleUserToggle = (id: string) => {
    setSelectedUserIds((prev) => {
      const next = new Set(prev);
      if (next.has(id)) {
        next.delete(id);
      } else {
        next.add(id);
      }
      return next;
    });
  };

  const handleCreate = (title: string, color: string) => {
    const newLabel: TaskLabel = {
      id: crypto.randomUUID(),
      title,
      color,
    };
    setLabels((prev) => [...prev, newLabel]);
    setSelectedLabelIds((prev) => new Set([...prev, newLabel.id]));
    setLabelsView("list");
  };

  const handleChecklistClose = () => {
    if (isChecklistOpen) onTabChange("checklist");
  };

  const handleChecklistCreate = (title: string, _copyFromId: string) => {
    const newChecklist: TaskChecklist = {
      id: crypto.randomUUID(),
      title,
    };
    setChecklists((prev) => [...prev, newChecklist]);
    handleChecklistClose();
  };

  const handleAttachmentClose = () => {
    if (isAttachmentOpen) onTabChange("attachment");
  };

  const handleAttachmentCreate = (_data: { file?: File; title: string; linkId: string }) => {
    handleAttachmentClose();
  };

  const handleDateClose = () => {
    if (isDateOpen) onTabChange("date");
  };

  const handleDateSubmit = (data: { startDate: DateObject | null; endDate: DateObject | null }) => {
    setStartDate(data.startDate);
    setEndDate(data.endDate);
    handleDateClose();
  };

  return (
    <div className="relative">
      <TaskDetailActionBar
        activeTab={activeTab}
        onTabChange={handleTabChange}
        labelsPopover={
          isLabelsOpen ? (
            <TaskDetailLabelsPopover
              view={labelsView}
              labels={labels}
              selectedIds={selectedLabelIds}
              onViewChange={setLabelsView}
              onToggle={handleLabelToggle}
              onCreate={handleCreate}
            />
          ) : null
        }
        usersPopover={
          isUsersOpen ? (
            <TaskDetailUsersPopover users={DEFAULT_USERS} selectedIds={selectedUserIds} onToggle={handleUserToggle} />
          ) : null
        }
        checklistPopover={
          isChecklistOpen ? (
            <TaskDetailChecklistPopover
              checklists={checklists}
              onClose={handleChecklistClose}
              onSubmit={handleChecklistCreate}
            />
          ) : null
        }
        attachmentPopover={
          isAttachmentOpen ? (
            <TaskDetailAttachmentPopover onClose={handleAttachmentClose} onSubmit={handleAttachmentCreate} />
          ) : null
        }
        datePopover={
          isDateOpen ? (
            <TaskDetailDatePopover onClose={handleDateClose} onSubmit={handleDateSubmit} />
          ) : null
        }
      />

      <TaskDetailMetadataPreview
        selectedLabels={selectedLabels}
        selectedUsers={selectedUsers}
        startDate={startDate}
        endDate={endDate}
      />
    </div>
  );
};

export default TaskDetailToolbar;