import { useState } from "react";
import { useNavigate } from "react-router-dom";
import { DeviceRequest } from "fhir/r4";
import { FhirDeviceRequestDisplay } from "../../../../components";
import {
  useFhirDeviceRequestBroadcast,
  useFhirDeviceRequests,
  useFhirDeviceRequestTargetedBroadcast,
} from "../../../../hooks";
import {
  useAuthServiceContext,
} from "../../../../services";
import { Button } from "../../../../components/ui/button.tsx";
import { ChevronRight, Cpu, Edit, Plus, Radio } from "lucide-react";
import { Skeleton } from "../../../../components/ui/skeleton.tsx";
import { Sheet, SheetContent } from "../../../../components/ui/sheet.tsx";
import { mayEditRecord } from '../../../../utils/recordEditability';
import { useSeatStanding } from '../../../../utils/seatStanding';

const DeviceRequests = () => {
  const navigate = useNavigate();
  const { userRole, USER_ROLES, practitionerRoles } = useAuthServiceContext();
  const seatStanding = useSeatStanding();
  // The nav row that opens this page says one thing and the page said another. A clinician reading
  // the same page through the chart is a different audience and keeps their own wording.
  const isPatientOrProxy = [USER_ROLES.PATIENT, USER_ROLES.RELATED_PERSON].includes(userRole as string);
  const { loading, error, deviceRequestsList } =
    useFhirDeviceRequests();
  const [selectedDeviceRequest, setSelectedDeviceRequest] =
    useState<DeviceRequest | null>(null);
  const [showDisplayModal, setShowDisplayModal] = useState<boolean>(false);

  useFhirDeviceRequestBroadcast();
  useFhirDeviceRequestTargetedBroadcast({
    deviceRequest: selectedDeviceRequest || undefined,
    isOpen: showDisplayModal,
    onUpdate: (updatedDeviceRequest) => {
      setSelectedDeviceRequest(updatedDeviceRequest);
    },
    onDelete: () => {
      setShowDisplayModal(false);
      setSelectedDeviceRequest(null);
    },
  });

  const viewDeviceRequest = (deviceRequest: DeviceRequest) => {
    setSelectedDeviceRequest(deviceRequest);
    setShowDisplayModal(true);
  };

  const editDeviceRequest = (
    event: React.MouseEvent,
    deviceRequest: DeviceRequest,
  ) => {
    event.stopPropagation();
    navigate(deviceRequest.id as string, { relative: "path" });
  };

  const addDeviceRequest = () => {
    navigate("new", { relative: "path" });
  };

  const roleAllowsEdit = () => {
    return userRole && [USER_ROLES.PRACTITIONER].includes(userRole as string);
  };

  /*
   * AND THE ROLE IS NOT THE RULE THE SERVER APPLIES.
   *
   * Writing a DeviceRequest needs a paid clinician seat, resolved per request by `callerMayWrite`. The role
   * check above passes for an unseated practitioner - a medical assistant, a nurse rooming patients,
   * somebody whose seat was turned off this morning - so the page offered Add and Edit, and the save
   * came back refused. A refusal that arrives after the typing has already spent the work.
   */
  const seat = mayEditRecord({ seatStanding,
      resourceType: 'DeviceRequest',
      viewerIsStaff: Boolean(userRole)
          && ![USER_ROLES.PATIENT, USER_ROLES.RELATED_PERSON].includes(userRole as string),
      practitionerRoles,
  });

  const isAuthorizedToEdit = () => roleAllowsEdit() && seat.mayEdit;

  return (
    <div>
      <div className="flex justify-between items-center">
        <div className="mb-2 lg:mb-0 sm:mb-0">
          <h2 className="font-bold text-xl">
            {isPatientOrProxy ? "Devices ordered for you" : "Devices"}
          </h2>
          <p className="text-sm">
            View and manage medical devices, implants, and associated
            traceability information.{" "}
          </p>
        </div>
        <div className="flex justify-end text-end">
          {/* SAID, NOT WITHHELD. A control that simply disappears reads as a broken screen or as a
              permission the reader has lost, and both send them to an administrator to check permissions
              that are already correct. A seat is nameable, and a practice can enable one in a minute. */}
          {roleAllowsEdit() && !seat.mayEdit && (
              <p className="text-sm text-secondary max-w-[22rem] text-right">{seat.reason}</p>
          )}
          {isAuthorizedToEdit() && (
            <Button onClick={addDeviceRequest}>
              <Plus />
              Add
            </Button>
          )}
        </div>
      </div>{" "}
      
      {error ? (
        <div className="flex flex-col items-center font-normal justify-center p-8 text-center space-y-5 pt-[100px]">
          <Radio strokeWidth={1} size={50} className="mx-auto mb-5" />{" "}
          <div>
            <h3 className="text-lg font-semibold mb-3">
              Could not load Devices requests
            </h3>
            <p className="text-muted-foreground">Try again later.</p>
          </div>
          <Button
            className="cursor-pointer bg-primary rounded p-2 text-white hover:bg-primary/80 px-4"
            onClick={() => window.location.reload()}
          >
            Retry
          </Button>
        </div>
      ) : !loading && deviceRequestsList.length === 0 ? (
        <div className="p-4 items-center justify-center text-center space-y-4 m-auto pt-[100px]">
          <Radio strokeWidth={1} size={50} className="mx-auto mb-5" />
          <p className="text-lg font-bold">
            No device requests found.
          </p>
          <p>
            There are currently No device requests found to your health record.
            Devices are added by your healthcare provider and will appear here
            once assigned.
          </p>
        </div>
      ) : loading ? (
        <div className="space-y-3 mt-3">
          {[...Array(7)].map((_, index) => (
            <div
              key={index}
              className="flex justify-between gap-3 items-center rounded p-1 animate-pulse"
            >
              <div className="space-y-2 w-3/4 items-center">
                <div className="flex items-center gap-4">
                  <Skeleton className="h-5 w-full rounded"></Skeleton>
                  <Skeleton className="h-5 w-full rounded"></Skeleton>
                </div>
                <Skeleton className="h-5 w-full rounded"></Skeleton>
              </div>
              <Skeleton className="h-12 w-12 rounded-full"></Skeleton>
            </div>
          ))}
        </div>
      ) : (
        deviceRequestsList.length !== 0 && (
          <div className="space-y-2 mt-3">
            {deviceRequestsList.map((deviceRequest: DeviceRequest) => {
              return (
                <div
                  className="focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 flex gap-2 justify-between items-center"
                  key={deviceRequest.id}
                  role="button"
                  tabIndex={0}
                  onClick={() => viewDeviceRequest(deviceRequest)}
                  onKeyDown={(event: React.KeyboardEvent) => {
                    if (event.key !== 'Enter' && event.key !== ' ') return;
                    event.preventDefault();
                    viewDeviceRequest(deviceRequest);
                  }}
                >
                  <div className="flex w-full justify-between gap-3 group items-center cursor-pointer rounded p-2 hover:bg-muted">
                    <div className="flex gap-2 items-center">
                      <Cpu
                        size={40}
                        className="bg-green-soft text-sage-ink p-2 rounded"
                      />
                      <div className="space-y-1">
                        <p className="font-bold flex gap-4 items-center text-lg">
                          {deviceRequest.codeCodeableConcept ? (
                            <span>
                              {deviceRequest.codeCodeableConcept.text
                                ?.split("[")[0]
                                .trim()}
                            </span>
                          ) : (
                            "Device name not available"
                          )}
                          <span className="text-xs bg-green-600 font-normal rounded p-0.5 px-2 text-white capitalize">
                            {deviceRequest.status ? deviceRequest.status : "-"}
                          </span>
                        </p>
                        <div className="flex gap-2 items-center text-secondary">
                          <p className="text-sm capitalize">
                            {deviceRequest.intent ? deviceRequest.intent : "-"}
                          </p>{" "}
                          ·
                          <p className="text-xs bg-amber-soft text-amber-ink px-2 py-0.5 capitalize">
                            {deviceRequest.priority
                              ? deviceRequest.priority
                              : "-"}
                          </p>{" "}
                        </div>
                      </div>
                    </div>
                    <div className="text-secondary group-hover:text-foreground transition-colors flex gap-2">
                      <ChevronRight size={30} strokeWidth={1} />
                    </div>
                  </div>
                  {isAuthorizedToEdit() && (
                    <Button
                      variant="outline"
                      onClick={(event: React.MouseEvent) =>
                        editDeviceRequest(event, deviceRequest)
                      }
                    >
                      <Edit /> Edit{" "}
                    </Button>
                  )}
                </div>
              );
            })}
          </div>
        )
      )}
      {selectedDeviceRequest && (
        <Sheet
          open={!!selectedDeviceRequest}
          onOpenChange={(open) => {
            if (!open) setSelectedDeviceRequest(null);
          }}
        >
          <SheetContent className="sm:max-w-[700px] sm:min-w-[700px] w-4/4">
            <FhirDeviceRequestDisplay
              deviceRequest={selectedDeviceRequest}
              isOpen={showDisplayModal}
              onClose={() => {
                setShowDisplayModal(false);
                setSelectedDeviceRequest(null);
              }}
            />
          </SheetContent>
        </Sheet>
      )}
    </div>
  );
};

export default DeviceRequests;

// import { useNavigate } from 'react-router-dom';
// import { DeviceRequest } from 'fhir/r4';
// import { AppSpinner, FhirDeviceRequestDisplay, ScrollableTab } from '../../../../components';
// import { formatDate } from '../../../../utils/dateUtils.ts';
// import {
// useFhirDeviceRequestBroadcast,
// useFhirDeviceRequests,
// useFhirDeviceRequestTargetedBroadcast
// } from '../../../../hooks';
// import { useAuthServiceContext, useDeviceRequestServiceContext } from '../../../../services';

// const DeviceRequests = () => {
// const navigate = useNavigate();
// const { userRole, USER_ROLES } = useAuthServiceContext();
// const { getDeviceRequestDisplay } = useDeviceRequestServiceContext();
// const { loading, error, clearError, deviceRequestsList } = useFhirDeviceRequests();
// const [isGuideOpen, setIsGuideOpen] = useState<boolean>(false);
// const [selectedDeviceRequest, setSelectedDeviceRequest] = useState<DeviceRequest | null>(null);
// const [showDisplayModal, setShowDisplayModal] = useState<boolean>(false);
// const spacerMargin = '24px';

// useFhirDeviceRequestBroadcast();
// useFhirDeviceRequestTargetedBroadcast({
// deviceRequest: selectedDeviceRequest || undefined,
// isOpen: showDisplayModal,
// onUpdate: (updatedDeviceRequest) => {
// setSelectedDeviceRequest(updatedDeviceRequest);
// },
// onDelete: () => {
// setShowDisplayModal(false);
// setSelectedDeviceRequest(null);
// }
// });

// const viewDeviceRequest = (deviceRequest: DeviceRequest) => {
// setSelectedDeviceRequest(deviceRequest);
// setShowDisplayModal(true);
// };

// const editDeviceRequest = (event: React.MouseEvent, deviceRequest: DeviceRequest) => {
// event.stopPropagation();
// navigate(deviceRequest.id as string, { relative: 'path' });
// };

// const addDeviceRequest = () => {
// navigate('new', { relative: 'path' });
// };

// const isAuthorizedToEdit = () => {
// return userRole && [USER_ROLES.PRACTITIONER].includes(userRole as string);
// };

// const getStatusDisplay = (deviceRequest: DeviceRequest): { text: string, color?: string } => {
// if (!deviceRequest) return { text: 'Unknown' };

// switch (deviceRequest.status) {
// case 'active':
// return { text: 'Active', color: '#00a32a' };
// case 'draft':
// return { text: 'Draft', color: '#4f94d4' };
// case 'entered-in-error':
// return { text: 'Error', color: '#cc1818' };
// case 'on-hold':
// return { text: 'On Hold', color: '#e39700' };
// case 'completed':
// return { text: 'Completed', color: '#7b3ff2' };
// case 'cancelled':
// return { text: 'Cancelled', color: '#757575' };
// case 'unknown':
// default:
// return { text: deviceRequest.status?.charAt(0).toUpperCase() + deviceRequest.status?.slice(1) || 'Unknown' };
// }
// };

// const getPriorityDisplay = (deviceRequest: DeviceRequest): { text: string, color?: string } => {
// if (!deviceRequest || !deviceRequest.priority) return { text: '' };

// switch (deviceRequest.priority) {
// case 'urgent':
// return { text: 'Urgent', color: '#cc1818' };
// case 'asap':
// return { text: 'ASAP', color: '#e39700' };
// case 'stat':
// return { text: 'STAT', color: '#cc1818' };
// case 'routine':
// return { text: 'Routine', color: '#4f94d4' };
// default:
// return { text: deviceRequest.priority.charAt(0).toUpperCase() + deviceRequest.priority.slice(1) };
// }
// };

// const getDeviceRequestDate = (deviceRequest: DeviceRequest) => {
// if (deviceRequest.occurrenceDateTime) {
// return `Requested for: ${formatDate(deviceRequest.occurrenceDateTime)}`;
// } else if (deviceRequest.occurrencePeriod?.start) {
// return `Requested for: ${formatDate(deviceRequest.occurrencePeriod.start)} ${deviceRequest.occurrencePeriod.end ? `to ${formatDate(deviceRequest.occurrencePeriod.end)}`: '(ongoing)'}`;
// } else if (deviceRequest.authoredOn) {
// return `Authored on: ${formatDate(deviceRequest.authoredOn)}`;
// }
// return '';
// };

// return (
// <View>
// <FhirGuide isOpen={isGuideOpen}
// onFinish={() => setIsGuideOpen(false)}
// resourceType="DeviceRequest"/>

// <Flex align="center" justify="space-between">
// <FlexBlock>
// </FlexBlock>
// <FlexItem>
// <Button variant="primary"
// icon={info}
// onClick={() => setIsGuideOpen(true)}>
// Help
// </Button>
// </FlexItem>
// {isAuthorizedToEdit() && (
// <FlexItem>
// <Button variant="primary"
// icon={plus}
// onClick={addDeviceRequest}>
// Add
// </Button>
// </FlexItem>
// )}
// </Flex>
// <Spacer margin="8"/>

// {error && (
// <>
// <Notice status="error" onRemove={clearError}>
// {error}
// </Notice>

// <Spacer margin={spacerMargin}/>
// </>
// )}

// {!loading && deviceRequestsList.length === 0 && (
// <>
// <Notice status="info" isDismissible={false}>
// No device requests found.
// </Notice>

// <Spacer margin={spacerMargin}/>
// </>
// )}

// <>
// {loading ? (
// <AppSpinner/>
// ): (
// <ScrollableTab>
// {deviceRequestsList.length !== 0 && (
// <ItemGroup isBordered isSeparated isRounded size="large">
// {deviceRequestsList.map((deviceRequest: DeviceRequest) => {
// const displayTitle = getDeviceRequestDisplay(deviceRequest);
// const { text: statusText, color: statusColor } = getStatusDisplay(deviceRequest);
// const { text: priorityText, color: priorityColor } = getPriorityDisplay(deviceRequest);
// const dateInfo = getDeviceRequestDate(deviceRequest);
// const intent = deviceRequest.intent ?
// `Intent: ${deviceRequest.intent.charAt(0).toUpperCase() + deviceRequest.intent.slice(1)}`: '';

// return (
// <Item key={deviceRequest.id}
// onClick={() => viewDeviceRequest(deviceRequest)}>
// <Flex>
// <FlexItem>
// <Icon icon={archive}
// size={24}
// style={{
// marginRight: 12,
// color: statusColor
// }}/>
// </FlexItem>
// <FlexBlock>
// <Flex align="center" justify="space-between">
// <FlexItem>
// <Text style={{ fontWeight: 500 }}>
// {displayTitle}
// </Text>
// {intent && (
// <Text variant="muted" style={{ display: 'block' }}>
// {intent}
// </Text>
// )}
// {priorityText && (
// <Text variant="muted" style={{ display: 'block', color: priorityColor }}>
// Priority: {priorityText}
// </Text>
// )}
// {dateInfo && (
// <Text variant="muted" style={{ display: 'block' }}>
// <Icon icon={calendar}
// size={16}
// style={{ marginRight: 4 }}/>
// {dateInfo}
// </Text>
// )}
// </FlexItem>
// {isAuthorizedToEdit() && (
// <FlexItem>
// <Button
// variant="secondary"
// size="small"
// icon={edit}
// onClick={(event: React.MouseEvent) => editDeviceRequest(event, deviceRequest)}
// >
// Edit
// </Button>
// </FlexItem>
// )}
// </Flex>
// </FlexBlock>
// </Flex>
// </Item>
// );
// })}
// </ItemGroup>
// )}
// </ScrollableTab>
// )}
// </>

// {selectedDeviceRequest && (
// <FhirDeviceRequestDisplay
// deviceRequest={selectedDeviceRequest}
// isOpen={showDisplayModal}
// onClose={() => {
// setShowDisplayModal(false);
// setSelectedDeviceRequest(null);
// }}
// />
// )}
// </View>
// );
// };

// export default DeviceRequests;