/**
 * TimePicker на базе MUI X: Static variant (как на скрине).
 */

'use client';

import React from 'react';
import { ru } from 'date-fns/locale';
import { LocalizationProvider } from '@mui/x-date-pickers/LocalizationProvider';
import { AdapterDateFns } from '@mui/x-date-pickers/AdapterDateFns';
import { StaticTimePicker } from '@mui/x-date-pickers/StaticTimePicker';
import { Box, Dialog, DialogContent, DialogTitle, Button } from '@mui/material';

interface TimePickerProps {
  value: string; // HH:mm format
  onChange: (value: string) => void;
  disabled?: boolean;
  required?: boolean;
}

export const TimePicker: React.FC<TimePickerProps> = ({
  value,
  onChange,
  disabled = false,
  required = false,
}) => {
  const [open, setOpen] = React.useState(false);
  const [draft, setDraft] = React.useState<Date | null>(null);

  const valueDate = React.useMemo(() => {
    const base = new Date();
    const parts = (value || '').split(':');
    const hh = Number(parts[0]);
    const mm = Number(parts[1]);
    if (Number.isFinite(hh) && Number.isFinite(mm)) {
      base.setHours(hh, mm, 0, 0);
      return base;
    }
    base.setHours(0, 0, 0, 0);
    return base;
  }, [value]);

  const openPicker = () => {
    if (disabled) return;
    setDraft(valueDate);
    setOpen(true);
  };

  const closePicker = () => setOpen(false);

  const commit = () => {
    const d = draft ?? valueDate;
    const hh = String(d.getHours()).padStart(2, '0');
    const mm = String(d.getMinutes()).padStart(2, '0');
    onChange(`${hh}:${mm}`);
    closePicker();
  };

  return (
    <>
      <button
        type="button"
        onClick={openPicker}
        disabled={disabled}
        aria-required={required}
        style={{
          width: '100%',
          padding: '12px 16px',
          fontSize: '16px',
          color: value ? 'var(--md-sys-color-on-surface)' : 'var(--md-sys-color-on-surface-variant)',
          background: 'var(--md-sys-color-surface)',
          border: `1px solid var(--md-sys-color-outline)`,
          borderRadius: '4px',
          fontFamily: 'inherit',
          cursor: disabled ? 'not-allowed' : 'pointer',
          outline: 'none',
          transition: 'all 0.2s ease',
          display: 'flex',
          alignItems: 'center',
          justifyContent: 'space-between',
          gap: '12px',
          textAlign: 'left',
        }}
      >
        <span>{value || 'Выберите время'}</span>
        <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
          <circle cx="12" cy="12" r="10"></circle>
          <polyline points="12 6 12 12 16 14"></polyline>
        </svg>
      </button>

      <Dialog open={open} onClose={closePicker} fullWidth maxWidth="xs">
        <DialogTitle sx={{ fontSize: 12, fontWeight: 700, letterSpacing: '0.08em' }}>
          ВЫБЕРИТЕ ВРЕМЯ
        </DialogTitle>
        <DialogContent sx={{ pt: 1 }}>
          <LocalizationProvider dateAdapter={AdapterDateFns} adapterLocale={ru}>
            <Box sx={{ display: 'flex', justifyContent: 'center' }}>
              <StaticTimePicker
                value={draft}
                onChange={(v) => setDraft(v == null ? null : v instanceof Date ? v : (v as { toDate?: () => Date }).toDate?.() ?? null)}
                ampm={false}
                minutesStep={5}
                localeText={{}}
                sx={{
                  '& .MuiClockPointer-root': {
                    backgroundColor: 'var(--md-sys-color-primary)',
                  },
                  '& .MuiClockPointer-thumb': {
                    borderColor: 'var(--md-sys-color-primary)',
                    backgroundColor: 'var(--md-sys-color-primary)',
                  },
                  '& .MuiClock-pin': {
                    backgroundColor: 'var(--md-sys-color-primary)',
                  },
                  '& .MuiClockNumber-root.Mui-selected': {
                    backgroundColor: 'var(--md-sys-color-primary)',
                    color: 'var(--md-sys-color-on-primary)',
                  },
                }}
                slotProps={{
                  // убираем встроенные CANCEL/OK у MUI
                  actionBar: { actions: [] },
                }}
              />
            </Box>
          </LocalizationProvider>

          <Box sx={{ display: 'flex', justifyContent: 'flex-end', gap: 1, mt: 1.5 }}>
            <Button
              onClick={closePicker}
              variant="text"
              sx={{
                color: 'var(--md-sys-color-primary)',
                '&:hover': { backgroundColor: 'rgba(116, 68, 253, 0.08)' },
              }}
            >
              ОТМЕНА
            </Button>
            <Button
              onClick={commit}
              variant="contained"
              sx={{
                backgroundColor: 'var(--md-sys-color-primary)',
                color: 'var(--md-sys-color-on-primary)',
                '&:hover': {
                  backgroundColor: 'color-mix(in srgb, var(--md-sys-color-primary) 88%, #000 12%)',
                },
              }}
            >
              ОК
            </Button>
          </Box>
        </DialogContent>
      </Dialog>
    </>
  );
};