import { useState, useEffect, useRef, useCallback } from 'react';
import { useDispatch } from 'react-redux';
import { useNavigate, useLocation } from 'react-router-dom';
import moment from 'moment';
import { Form, Tooltip, Collapse, Space, Modal, Table } from 'antd';
import {
  ArrowRightOutlined,
  PlusCircleOutlined,
  DeleteFilled,
  EditFilled,
  InfoCircleOutlined,
  ReloadOutlined,
} from '@ant-design/icons';
import { InputField } from '../../Components/Forms/InputField.jsx';
import Buttons from '../../Components/Forms/Buttons.jsx';
import { Messages } from '../../Components/Notifications/Messages';
import { TimePickers } from '../../Components/Forms/TimePicker.jsx';
import FormHeader from '../PageComponents/FormHeader.jsx';
import { changeBreadCrumb } from '../../Features/AppPage/CenterPage.js';
import { getSession, validateSafeInput } from '../../Services/Others';
import { postshift, putshift } from '../../Features/ShiftMaster/ShiftMaster.js';
import './ShiftMaster.scss';
import { FaPlus } from 'react-icons/fa6';
import '../../Styles/OverAllStyle/OverAllStyle.scss';

const subDirectory = import.meta.env.BASE_URL;

const ShiftForm = ({ formType }) => {
  const formRef = useRef(null);
  const dispatch = useDispatch();
  const navigate = useNavigate();
  const location = useLocation();
  const state = location?.state;
  const editstate = state?.editstate;

  const CompId = getSession('CompId');
  const BranchId = getSession('BranchId');
  const AppId = getSession('AppId');
  const UserId = getSession('UserId');

  const [messageType, setMessageType] = useState(null);
  const [messageData, setMessageData] = useState(null);
  const [fromTime, setFromTime] = useState();
  const [toTime, setToTime] = useState();
  const [BrakeFromTime, setBrakeFromTime] = useState();
  const [BrakeToTime, setBrakeToTime] = useState();
  const [Tabledata, setTabledata] = useState([]);
  const [searchedText, setSearchedText] = useState('');
  const [sortedInfo, setSortedInfo] = useState({});
  const [editDataval, setEditDataval] = useState(false);
  const [page, setpage] = useState(1);
  const [editIndex, setEditIndex] = useState();
  const [BrakeId, setBrakeId] = useState();

  const items = [
    {
      name: 'Home',
      link: `${subDirectory}app-page/home`,
    },

    {
      name: 'Shift',
      link: `${subDirectory}setting/shift-master`,
    },
    {
      name: editstate ? 'Edit' : 'New',
      link: null,
      // link:  editstate
      // ? `${subDirectory}setting/shift-master/update`
      // : `${subDirectory}setting/shift-master/new`,
    },
  ];

  useEffect(() => {
    try {
      dispatch(changeBreadCrumb({ items: items }));
      if (formType === 'edit') {
        if (editstate) {
          setFromTime(editstate?.StartTime);
          setToTime(editstate?.EndTime);
          setBrakeFromTime(editstate?.BreakStartTime);
          setBrakeToTime(editstate?.BreakEndTime);
          setTabledata(editstate?.BreakDtl);

          formRef.current?.setFieldsValue(editstate);
        } else {
          navigate(`${subDirectory}setting/shift-master/`);
        }
      }
    } catch (err) {
      console.log(err, 'err');
    }
  }, []);

  const onFinish = async (values) => {
    // Validate all break times are within shift time range
    const shiftStart = moment(fromTime, 'HH:mm:ss');
    const shiftEnd = moment(toTime, 'HH:mm:ss');

    for (const breakItem of Tabledata) {
      const breakStart = moment(breakItem.BreakStartTime, 'HH:mm:ss');
      const breakEnd = moment(breakItem.BreakEndTime, 'HH:mm:ss');

      const isValidBreak = shiftEnd.isBefore(shiftStart)
        ? (breakStart.isAfter(shiftStart) || breakStart.isBefore(shiftEnd)) &&
          (breakEnd.isAfter(shiftStart) || breakEnd.isBefore(shiftEnd))
        : breakStart.isBetween(shiftStart, shiftEnd, null, '[]') &&
          breakEnd.isBetween(shiftStart, shiftEnd, null, '[]');

      if (!isValidBreak) {
        setMessageType('error');
        setMessageData(
          `Break "${breakItem.BreakName}" is not within shift time range`
        );
        return;
      }
    }

    let postData = {
      AppId: getSession('AppId'),
      BranchId: getSession('BranchId'),
      CompId: getSession('CompId'),
      ShiftName: values.ShiftName,
      StartTime: fromTime,
      EndTime: toTime,
      GracePeriod: values.GracePeriod,
      BreakDtl: Tabledata.map((item) => ({
        BreakName: item.BreakName,
        BreakStartTime: item.BreakStartTime,
        BreakEndTime: item.BreakEndTime,
        BreakId: item.BreakId ? item.BreakId : '',
      })),
      CreatedBy: getSession('UserId'),
    };

    console.log(postData, 'postDatapostDatapostDatapostDatapostData');

    let response = {};
    if (formType === 'add') {
      response = await dispatch(postshift(postData)).unwrap();
    } else if (formType === 'edit') {
      if (editstate) {
        postData['UpdatedBy'] = getSession('UserId');
        postData['ShiftId'] = editstate?.ShiftId;
      }

      response = await dispatch(putshift(postData)).unwrap();
    }

    if (response?.data?.statusCode == 1) {
      navigate(`${subDirectory}setting/shift-master/`, {
        state: {
          Notiffy: {
            messageType: 'success',
            messageData: response?.data?.response,
          },
        },
      });
    } else {
      setMessageType('error');
      setMessageData(response?.data?.response);
    }
  };

  const validateTime = (rule, value, callback) => {
    // if either value is not set yet, bail out (required rule will show message)
    if (!fromTime || !toTime) {
      return callback();
    }

    // parse safely (allow formats like "HH:mm" or "HH:mm:ss")
    const fromParts = (fromTime || '')
      .split(':')
      .map((s) => parseInt(s, 10) || 0);
    const toParts = (toTime || '').split(':').map((s) => parseInt(s, 10) || 0);

    const [fromHour = 0, fromMinute = 0] = fromParts;
    const [toHour = 0, toMinute = 0] = toParts;

    const fromTotalMinutes = fromHour * 60 + fromMinute;
    const toTotalMinutes = toHour * 60 + toMinute;
    const minutesInDay = 24 * 60;
    let timeDifference = toTotalMinutes - fromTotalMinutes;

    if (timeDifference < 0) {
      timeDifference = minutesInDay - fromTotalMinutes + toTotalMinutes;
    }

    const maxAllowedInterval = 12 * 60;

    if (timeDifference <= maxAllowedInterval) {
      return callback();
    } else {
      return callback('Shift should not exceed 12 hours');
    }
  };

  const validateBreakTime1 = (rule, value, callback) => {
    if (!value) return callback();

    const brakeFromTime = moment(BrakeFromTime, 'HH:mm');
    const startTime = moment(fromTime, 'HH:mm');
    const endTime = moment(toTime, 'HH:mm');

    if (endTime.isBefore(startTime)) {
      // Handle shifts that span across midnight
      if (brakeFromTime.isAfter(startTime) || brakeFromTime.isBefore(endTime)) {
        callback(); // Valid time interval
      } else {
        callback(
          'Break Start Time should be between Shift Start Time and Shift End Time'
        );
      }
    } else {
      if (
        brakeFromTime.isBetween(startTime, endTime, null, '[]') ||
        brakeFromTime.isSame(startTime) ||
        brakeFromTime.isSame(endTime)
      ) {
        callback(); // Valid time interval
      } else {
        callback(
          'Break Start Time should be between Shift Start Time and Shift End Time'
        );
      }
    }
  };

  const validateBreakTime2 = (rule, value, callback) => {
    if (!value) return callback();

    const brakeToTime = moment(BrakeToTime, 'HH:mm');
    const brakeFromTime = moment(BrakeFromTime, 'HH:mm');
    const startTime = moment(fromTime, 'HH:mm');
    const endTime = moment(toTime, 'HH:mm');

    if (endTime.isBefore(startTime)) {
      // Handle shifts that span across midnight
      if (brakeToTime.isAfter(startTime) || brakeToTime.isBefore(endTime)) {
        // Check if BrakeToTime is always greater than BrakeFromTime
        if (brakeToTime.isAfter(brakeFromTime)) {
          callback(); // Valid time interval
        } else {
          callback('Break End Time should be greater than Break Start Time');
        }
      } else {
        callback(
          'Break End Time should be between Shift Start Time and Shift End Time'
        );
      }
    } else {
      if (
        brakeToTime.isBetween(startTime, endTime, null, '[]') ||
        brakeToTime.isSame(startTime) ||
        brakeToTime.isSame(endTime)
      ) {
        // Check if BrakeToTime is always greater than BrakeFromTime
        if (brakeToTime.isAfter(brakeFromTime)) {
          callback(); // Valid time interval
        } else {
          callback('Break End Time should be greater than Break Start Time');
        }
      } else {
        callback(
          'Break End Time should be between Shift Start Time and Shift End Time'
        );
      }
    }
  };

  const onFromTimeChange = (time, timeString) => {
    if (timeString) {
      const fromTime = moment(timeString, ['h:mm a']).format('HH:mm:ss');
      setToTime(null);
      setFromTime(fromTime);
    } else {
      setFromTime(null);
    }
  };

  const onToTimeChange = (time, timeString) => {
    if (timeString) {
      const toTime = moment(timeString, ['h:mm a']).format('HH:mm:ss');
      setToTime(toTime);
    } else {
      setToTime(null);
    }
  };

  const onBrakeFromTimeChange = (time, timeString) => {
    if (timeString) {
      const FromBrakeTime = moment(timeString, ['h:mm a']).format('HH:mm:ss');
      setBrakeFromTime(FromBrakeTime);
      setBrakeToTime(null);
    } else {
      setBrakeFromTime(null);
    }
  };

  const onBrakeToTimeChange = (time, timeString) => {
    if (timeString) {
      const toBrakeTime = moment(timeString, ['h:mm a']).format('HH:mm:ss');
      setBrakeToTime(toBrakeTime);
    } else {
      setBrakeToTime(null);
    }
  };

  const Columns = [
    {
      title: 'Sl.No',
      key: 'sno',
      align: 'center',
      render: (text, object, index) => (
        <a style={{ color: 'black' }}>{(page - 1) * 10 + index + 1}</a>
      ),
    },
    {
      title: 'Break Name',
      dataIndex: 'BreakName',
      key: 'BreakName',
      editable: true,
      render: (text) => <a style={{ color: 'black' }}>{text}</a>,
      filteredValue: [searchedText],
      onFilter: (value, record) => {
        return (
          String(record.TableName)
            ?.toLowerCase()
            ?.includes(value?.toLowerCase()) ||
          String(record.TableName)
            ?.toLowerCase()
            ?.includes(value?.toLowerCase()) ||
          String(record.ChairCount)
            ?.toLowerCase()
            ?.includes(value?.toLowerCase()) ||
          String(record.ChairLevelSer)
            ?.toLowerCase()
            ?.includes(value?.toLowerCase()) ||
          String(record.DineInTypeName)
            ?.toLowerCase()
            ?.includes(value?.toLowerCase())
        );
      },
      sorter: (a, b) => a?.BreakName?.length - b?.BreakName?.length,
      sortOrder: sortedInfo.columnKey === 'BreakName' ? sortedInfo.order : null,
      ellipsis: true,
    },
    {
      title: 'Break Start',
      dataIndex: 'BreakStartTime',
      key: 'BreakStartTime',
    },
    {
      title: 'Break End',
      dataIndex: 'BreakEndTime',
      key: 'BreakEndTime',
    },
    {
      title: 'Duration (mins)',
      key: 'Duration',
      align: 'center',
      render: (_, record) => {
        const startTime = moment(record.BreakStartTime, 'HH:mm:ss');
        const endTime = moment(record.BreakEndTime, 'HH:mm:ss');
        const duration = endTime.diff(startTime, 'minutes');
        return duration > 0 ? duration : 0;
      },
    },
    {
      title: 'Action',
      key: 'Action',
      dataIndex: 'Action',
      align: 'center',
      render: (_, record, index) => (
        // Tabledata.length >= 1 ? (
        <Space size="middle">
          {/* {record.ActiveStatus === "A" ? ( */}
          <a>
            <EditFilled
              style={{ color: '#1292EE' }}
              onClick={
                () =>
                  // ((UserType === 'Super Admin') ||
                  //   (UserType === "Super Admin User" && SAAccessCommonMaster?.UpdateAccess === "Y") ||
                  //   (UserType === 'Employee' && empData?.UpdateAccess === "Y") ||
                  //   (UserType === 'Admin'))
                  //   ?
                  actionsFormatter(record, index)
                // : null
              }
            />
          </a>
          {/* ) : (
              ""
            )} */}
          <a>
            {/* {record.ActiveStatus === "A" ? ( */}
            <DeleteFilled
              style={{
                color: '#FF4D4F',
              }}
              onClick={() => statusFormatter(record)}
            />
            {/* ) : (
                <ReloadOutlined
                  style={{
                    color: "#ff4d4f",
                    pointerEvents: "none"
                  }}
                />
              )} */}
          </a>
        </Space>
      ),
      // ) : null,
    },
  ];

  const handleadd = async (values) => {
    try {
      // Validate break time fields before adding
      await formRef.current?.validateFields([
        'BreakName',
        'BreakStartTime',
        'BreakEndTime',
      ]);

      const Formdata = formRef.current?.getFieldsValue();
      const alreadyExists = Tabledata.some(
        (item) => item.BreakName === Formdata?.BreakName
      );

      if (BrakeFromTime && BrakeToTime && Formdata?.BreakName != undefined) {
        if (!alreadyExists) {
          setTabledata((prev) => {
            const newIndex = prev.length + 1;

            const datas = {
              BreakName: Formdata?.BreakName,
              BreakStartTime: BrakeFromTime,
              BreakEndTime: BrakeToTime,
              key: newIndex,
            };

            return [...prev, datas];
          });

          setBrakeFromTime();
          setBrakeToTime();
          formRef.current.resetFields([
            'BreakEndTime',
            'BreakStartTime',
            'BreakName',
          ]);
        } else {
          setMessageType('error');
          setMessageData('Break Time Already Exist');
        }
      } else {
        setMessageType('error');
        setMessageData('Add Break Time');
      }
    } catch (error) {
      setMessageType('error');
      setMessageData('Please fix validation errors before adding break time');
    }
  };

  const handleEdit = async (values) => {
    try {
      // Validate break time fields before editing
      await formRef.current?.validateFields([
        'BreakName',
        'BreakStartTime',
        'BreakEndTime',
      ]);

      const Formdata = formRef.current?.getFieldsValue();
      const alreadyExists = Tabledata.some(
        (item, idx) =>
          item.BreakName === Formdata?.BreakName && idx !== editIndex
      );

      if (BrakeFromTime && BrakeToTime && Formdata?.BreakName !== undefined) {
        if (!alreadyExists) {
          const updatedArray = [...Tabledata];
          updatedArray[editIndex] = {
            ...updatedArray[editIndex],
            BreakName: Formdata?.BreakName,
            BreakStartTime: BrakeFromTime,
            BreakEndTime: BrakeToTime,
            BreakId: BrakeId,
          };

          setTabledata(updatedArray);
          setBrakeFromTime();
          setBrakeToTime();
          setEditDataval(false);
          formRef.current.resetFields([
            'BreakEndTime',
            'BreakStartTime',
            'BreakName',
          ]);
        } else {
          setMessageType('error');
          setMessageData('Break Time Already Exists');
        }
      } else {
        setMessageType('error');
        setMessageData('Add Break Time');
      }
    } catch (error) {
      setMessageType('error');
      setMessageData('Please fix validation errors before editing break time');
    }
  };

  const actionsFormatter = async (row, index, rowIndex) => {
    setEditDataval(true);
    setEditIndex(index);

    console.log(row, rowIndex, 'row, rowIndexrow, rowIndex');
    formRef.current?.setFieldsValue({
      BreakName: row?.BreakName,
      BreakStartTime: row?.BreakStartTime,
      BreakEndTime: row?.BreakEndTime,
    });
    (setBrakeFromTime(row?.BreakStartTime), setBrakeToTime(row?.BreakEndTime));
    setBrakeId(row?.BreakId);
  };

  const statusFormatter = (record, index) => {
    let Deleteddata = Tabledata.filter(
      (item) => item.BreakName != record?.BreakName
    );
    setTabledata(Deleteddata);
  };

  const onComplete = useCallback(() => {
    setMessageData(null);
    setMessageType(null);
  }, []);

  return (
    <div className="shiftMasterForm-Master" style={{ fontFamily: 'Poppins' }}>
      <div className="pageOverAll">
        <div className="userPage">
          <div className="userPageContent">
            <Messages
              messageType={messageType}
              messageData={messageData}
              onComplete={onComplete}
            />
            <div className="formName">
              <FormHeader title={'Shift'} />
            </div>

            <div className="formDiv">
              <Form
                ref={formRef}
                className="formDivAnt"
                onFinish={onFinish}
                initialValues={{ ...editstate }}
              >
                <div className="formDivS">
                  <div className="inputForm">
                    <Form.Item
                      name="ShiftName"
                      rules={[
                        {
                          required: true,
                          pattern: /^(?!\s*$).+/,
                          message: 'Please Enter Shift Name',
                        },
                        {
                          validator: async (_, value) => {
                            await validateSafeInput(value);
                            if (value?.length > 20) {
                              return Promise.reject(
                                'Shift Name Max 20 characters allowed'
                              );
                            } else {
                              return Promise.resolve();
                            }
                          },
                        },
                      ]}
                    >
                      <InputField
                        label={<label class="required">Shift Name</label>}
                        isOnChange={
                          formType == 'edit' || editDataval ? true : false
                        }
                        autocomplete="off"
                      />
                    </Form.Item>

                    <Form.Item
                      name="StartTime"
                      rules={[
                        {
                          required: true,
                          message: 'Please Select Shift Start Time',
                        },
                      ]}
                    >
                      <TimePickers
                        label={<label class="required">Start Time</label>}
                        isOnChange={true}
                        onChange={onFromTimeChange}
                        valueData={fromTime}
                      />
                    </Form.Item>

                    <Form.Item
                      name="EndTime"
                      rules={[
                        {
                          required: true,
                          message: 'Please Select Shift End Time',
                        },
                        { validator: validateTime },
                      ]}
                    >
                      <TimePickers
                        label={<label class="required">End Time</label>}
                        isOnChange={true}
                        onChange={onToTimeChange}
                        valueData={toTime}
                      />
                    </Form.Item>

                    <Form.Item
                      name="GracePeriod"
                      rules={[
                        {
                          required: true,
                          pattern: /^(?!\s*$).+/,
                          message: 'Please Enter Grace Period',
                        },
                        {
                          validator: async (_, value) => {
                            if (
                              value === undefined ||
                              value === null ||
                              value === ''
                            ) {
                              return Promise.resolve(); // ✅ Allow empty value (optional field)
                            }
                            await validateSafeInput(value);
                            if (value <= 60 && value >= 0) {
                              return Promise.resolve();
                            } else if (!value) {
                              return Promise.reject(
                                'Please Enter Grace Period'
                              );
                            } else {
                              return Promise.reject(
                                'Please Enter below or equal to (60 mins)'
                              );
                            }
                          },
                        },
                      ]}
                    >
                      <InputField
                        label={
                          <label class="required">Grace Period (Min)</label>
                        }
                        type="number"
                        autoComplete="off"
                        min={1}
                        max={60}
                        maxLength={2}
                        isOnChange={
                          formType == 'edit' || editDataval ? true : false
                        }
                      />
                    </Form.Item>

                    <Collapse className="breakTimeSection">
                      <Collapse.Panel header="Break Time Configuration" key="1">
                        <div
                          style={{
                            display: 'flex',
                            gap: '16px',
                            alignItems: 'start',
                            flexWrap: 'wrap',
                          }}
                        >
                          <Form.Item
                            name="BreakName"
                            rules={[
                              {
                                validator: async (_, value) => {
                                  await validateSafeInput(value);
                                  if (value?.length > 20) {
                                    return Promise.reject(
                                      'Break Name Max 20 characters allowed'
                                    );
                                  } else {
                                    return Promise.resolve();
                                  }
                                },
                              },
                            ]}
                          >
                            <InputField
                              label={<label class="required">Break Name</label>}
                              autocomplete="off"
                              isOnChange={
                                formType == 'edit' || editDataval ? true : false
                              }
                            />
                          </Form.Item>

                          <Form.Item
                            name="BreakStartTime"
                            rules={[{ validator: validateBreakTime1 }]}
                          >
                            <TimePickers
                              label={
                                <label class="required">Break Start Time</label>
                              }
                              isOnChange={true}
                              onChange={onBrakeFromTimeChange}
                              valueData={BrakeFromTime}
                            />
                          </Form.Item>

                          <Form.Item
                            name="BreakEndTime"
                            rules={[{ validator: validateBreakTime2 }]}
                          >
                            <TimePickers
                              label={
                                <label class="required">Break End Time</label>
                              }
                              isOnChange={true}
                              onChange={onBrakeToTimeChange}
                              valueData={BrakeToTime}
                            />
                          </Form.Item>
                          <button
                            type="button"
                            className="break-add"
                            onClick={() => {
                              editDataval ? handleEdit() : handleadd();
                            }}
                          >
                            <FaPlus />
                            <p>Add Break</p>
                          </button>
                        </div>
                      </Collapse.Panel>
                    </Collapse>

                    <div
                      className="Quotation-tables Quotation-tablesShift"
                      style={{
                        maxwidth: '500px',
                        overflowX: 'auto',
                        scrollbarWidth: 'thin',
                      }}
                    >
                      <Table
                        bordered
                        columns={Columns}
                        dataSource={Tabledata}
                      />
                    </div>
                  </div>
                </div>

                <div className="submitButton">
                  <Buttons
                    buttonText="SUBMIT"
                    color="901D77"
                    icon={<ArrowRightOutlined />}
                    // handleSubmit={handleSubmit}
                  />
                </div>
              </Form>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
};

export default ShiftForm;