import React, { useState, useEffect } from 'react';
import { GenericModal } from "../atoms/GenericModal";
import { MenuItem, TextField, Typography, Box, Switch, FormControlLabel } from "@mui/material";
import { Dropdown } from "../atoms/DropdownMui";
import Button from "@mui/material/Button";
import { modalStyle } from "./AddWhereCondModal";
import { validMomentTimezones } from '../../constants/const';

interface ScheduleSettingsProps {
  isOpen: boolean;
  handleStart: (settings: ScheduleSettings) => void;
  handleClose: () => void;
  initialSettings?: ScheduleSettings | null;
}

export interface ScheduleSettings {
  enabled: boolean;
  runEvery: number;
  runEveryUnit: string;
  startFrom: string;
  atTimeStart?: string;
  atTimeEnd?: string;
  timezone: string;
}

export const ScheduleSettingsModal = ({ isOpen, handleStart, handleClose, initialSettings }: ScheduleSettingsProps) => {
  const [settings, setSettings] = useState<ScheduleSettings>({
    enabled: true,
    runEvery: 1,
    runEveryUnit: 'HOURS',
    startFrom: 'MONDAY',
    atTimeStart: '00:00',
    atTimeEnd: '01:00',
    timezone: 'UTC'
  });

  // Load initial settings if provided
  useEffect(() => {
    if (initialSettings) {
      setSettings(initialSettings);
    }
  }, [initialSettings]);

  const handleChange = (field: keyof ScheduleSettings, value: string | number | boolean) => {
    setSettings(prev => ({ ...prev, [field]: value }));
  };

  const textStyle = {
    width: '150px',
    height: '52px',
    marginRight: '10px',
  };

  const dropDownStyle = {
    marginTop: '2px',
    width: '150px',
    height: '59px',
    marginRight: '10px',
  };

  const units = [
    'MINUTES',
    'HOURS',
    'DAYS',
    'WEEKS',
    'MONTHS'
  ];

  const days = [
    'MONDAY',
    'TUESDAY',
    'WEDNESDAY',
    'THURSDAY',
    'FRIDAY',
    'SATURDAY',
    'SUNDAY'
  ];

  const deleteSchedule = () => {
    setSettings({
      enabled: false,
      runEvery: 1,
      runEveryUnit: 'HOURS',
      startFrom: 'MONDAY',
      atTimeStart: '00:00',
      atTimeEnd: '01:00',
      timezone: 'UTC'
    });
  };

  return (
    <GenericModal
      isOpen={isOpen}
      onClose={handleClose}
      modalStyle={modalStyle}
    >
      <Box sx={{
        display: 'flex',
        flexDirection: 'column',
        alignItems: 'flex-start',
        padding: '20px',
        '& > *': { marginBottom: '20px' },
      }}>
        <Typography variant="h6" sx={{ marginBottom: '20px' }}>Schedule Settings</Typography>
        <>
          <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
            <Typography sx={{ marginRight: '10px' }}>Run once every</Typography>
            <TextField
              type="number"
              value={settings.runEvery}
              onChange={(e) => handleChange('runEvery', parseInt(e.target.value))}
              sx={textStyle}
              inputProps={{ min: 1 }}
            />
            <Dropdown
              label=""
              id="runEveryUnit"
              value={settings.runEveryUnit}
              handleSelect={(e) => handleChange('runEveryUnit', e.target.value)}
              sx={dropDownStyle}
            >
              {units.map((unit) => (
                <MenuItem key={unit} value={unit}>{unit}</MenuItem>
              ))}
            </Dropdown>
          </Box>

          <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
            <Typography sx={{ marginBottom: '5px', marginRight: '25px' }}>Start from / On</Typography>
            <Dropdown
              label=""
              id="startFrom"
              value={settings.startFrom}
              handleSelect={(e) => handleChange('startFrom', e.target.value)}
              sx={dropDownStyle}
            >
              {days.map((day) => (
                <MenuItem key={day} value={day}>{day}</MenuItem>
              ))}
            </Dropdown>
          </Box>

          {['MINUTES', 'HOURS'].includes(settings.runEveryUnit) ? (
            <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
              <Box sx={{ marginRight: '20px' }}>
                <Typography sx={{ marginBottom: '5px' }}>In Between</Typography>
                <TextField
                  type="time"
                  value={settings.atTimeStart}
                  onChange={(e) => handleChange('atTimeStart', e.target.value)}
                  sx={textStyle}
                />
                <TextField
                  type="time"
                  value={settings.atTimeEnd}
                  onChange={(e) => handleChange('atTimeEnd', e.target.value)}
                  sx={textStyle}
                />
              </Box>
            </Box>
          ) : (
            <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
              <Typography sx={{ marginBottom: '5px', marginRight: '10px' }}>At Around</Typography>
              <TextField
                type="time"
                value={settings.atTimeStart}
                onChange={(e) => handleChange('atTimeStart', e.target.value)}
                sx={textStyle}
              />
            </Box>
          )}

          <Box sx={{ display: 'flex', alignItems: 'center', width: '100%' }}>
            <Typography sx={{ marginRight: '10px' }}>Timezone</Typography>
            <Dropdown
              label=""
              id="timezone"
              value={settings.timezone}
              handleSelect={(e) => handleChange('timezone', e.target.value)}
              sx={dropDownStyle}
            >
              {validMomentTimezones.map((tz) => (
                <MenuItem key={tz} value={tz}>{tz}</MenuItem>
              ))}
            </Dropdown>
          </Box>
        </>

        <Box mt={2} display="flex" justifyContent="space-between">
          <Button
            onClick={deleteSchedule}
            variant="outlined"
            color="secondary"
          >
            Delete Schedule
          </Button>
        </Box>

        <Box mt={2} display="flex" justifyContent="flex-end">
          <Button onClick={() => handleStart(settings)} variant="contained" color="primary">
            Save Schedule
          </Button>
          <Button onClick={handleClose} color="primary" variant="outlined" style={{ marginLeft: '10px' }}>
            Cancel
          </Button>
        </Box>
      </Box>
    </GenericModal>
  );
};