import React from 'react';
import { Box, Slider, Typography } from '@mui/material';

interface MemorySliderProps {
  memory: number;
  onChange: (e: Event, value: number | number[]) => void;
  min?: number;
  max?: number;
  step?: number;
}

const gradientPrimary =
  'linear-gradient(71deg, #F27121 0%, #E940CD 70%, #8A2387 100%)';

const formatMb = (v: number) => `${v} MB`;
const formatGb = (v: number) => `${(v / 1024).toFixed(v % 1024 === 0 ? 0 : 1)} GB`;

const MemorySlider = ({
  memory,
  onChange,
  min = 1024,
  max = 32768,
  step = 1024,
}: MemorySliderProps) => {
  // marks только на “красивых” значениях, чтобы не было каши
  const marks = [
    { value: 1024, label: '1 GB' },
    { value: 4096, label: '4 GB' },
    { value: 8192, label: '8 GB' },
    { value: 16384, label: '16 GB' },
    { value: 32768, label: '32 GB' },
  ].filter((m) => m.value >= min && m.value <= max);

  return (
    <Box sx={{ width: '100%' }}>
      {/* Header */}
      <Box
        sx={{
          display: 'flex',
          alignItems: 'baseline',
          justifyContent: 'space-between',
          mb: '1.2vh',
        }}
      >
        <Typography
          sx={{
            fontFamily: 'Benzin-Bold, system-ui, -apple-system, Segoe UI, Roboto, Arial',
            fontWeight: 800,
            fontSize: '1.1vw',
            color: '#fff',
            textTransform: 'uppercase',
            letterSpacing: 0.5,
          }}
        >
          Память
        </Typography>

        <Typography
          sx={{
            fontFamily: 'Benzin-Bold, system-ui, -apple-system, Segoe UI, Roboto, Arial',
            fontWeight: 800,
            fontSize: '1.1vw',
            backgroundImage: gradientPrimary,
            WebkitBackgroundClip: 'text',
            WebkitTextFillColor: 'transparent',
          }}
        >
          {memory >= 1024 ? formatGb(memory) : formatMb(memory)}
        </Typography>
      </Box>

      <Slider
        name="memory"
        aria-label="Memory"
        valueLabelDisplay="auto"
        valueLabelFormat={(v) => (v >= 1024 ? formatGb(v as number) : formatMb(v as number))}
        shiftStep={step}
        step={step}
        marks={marks}
        min={min}
        max={max}
        value={memory}
        onChange={onChange}
        sx={{
          px: '0.2vw',

          // rail (фон полосы)
          '& .MuiSlider-rail': {
            opacity: 1,
            height: '0.9vh',
            borderRadius: '999vw',
            backgroundColor: 'rgba(255,255,255,0.10)',
            boxShadow: 'inset 0 0.25vh 0.6vh rgba(0,0,0,0.45)',
          },

          // track (заполненная часть)
          '& .MuiSlider-track': {
            height: '0.9vh',
            borderRadius: '999vw',
            border: 'none',
            background: gradientPrimary,
            boxShadow: '0 0.6vh 1.6vh rgba(233,64,205,0.18)',
          },

          // thumb (ползунок)
          '& .MuiSlider-thumb': {
            width: '1.6vw',
            height: '1.6vw',
            minWidth: 14,
            minHeight: 14,
            borderRadius: '999vw',
            background: 'rgba(10,10,20,0.92)',
            border: '0.22vw solid rgba(255,255,255,0.18)',
            boxShadow:
              '0 0.9vh 2.4vh rgba(0,0,0,0.55), 0 0 1.2vw rgba(242,113,33,0.20)',
            transition: 'transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease',
            '&:hover': {
              // transform: 'scale(1.06)',
              borderColor: 'rgba(242,113,33,0.55)',
              boxShadow:
                '0 1.1vh 2.8vh rgba(0,0,0,0.62), 0 0 1.6vw rgba(233,64,205,0.28)',
            },

            // внутренний “свет”
            '&:before': {
              content: '""',
              position: 'absolute',
              inset: '18%',
              borderRadius: '999vw',
              background: gradientPrimary,
              opacity: 0.85,
              filter: 'blur(0.3vw)',
            },
          },

          // value label (плашка значения)
          '& .MuiSlider-valueLabel': {
            fontFamily: 'Benzin-Bold, system-ui, -apple-system, Segoe UI, Roboto, Arial',
            fontSize: '0.85vw',
            borderRadius: '1.2vw',
            padding: '0.4vh 0.8vw',
            color: '#fff',
            background: 'rgba(0,0,0,0.55)',
            border: '1px solid rgba(255,255,255,0.10)',
            backdropFilter: 'blur(10px)',
            boxShadow: '0 1.2vh 3vh rgba(0,0,0,0.55)',
            '&:before': { display: 'none' },
          },

          // marks (точки)
          '& .MuiSlider-mark': {
            width: '0.35vw',
            height: '0.35vw',
            minWidth: 4,
            minHeight: 4,
            borderRadius: '999vw',
            backgroundColor: 'rgba(255,255,255,0.18)',
          },
          '& .MuiSlider-markActive': {
            backgroundColor: 'rgba(255,255,255,0.55)',
          },

          // mark labels (подписи)
          '& .MuiSlider-markLabel': {
            color: 'rgba(255,255,255,0.55)',
            fontSize: '0.75vw',
            marginTop: '1vh',
            userSelect: 'none',
          },

          // focus outline
          '& .MuiSlider-thumb.Mui-focusVisible': {
            outline: 'none',
            boxShadow:
              '0 0 0 0.25vw rgba(242,113,33,0.20), 0 1.1vh 2.8vh rgba(0,0,0,0.62)',
          },
        }}
      />

      {/* Subtext */}
      <Typography sx={{ mt: '1.2vh', color: 'rgba(255,255,255,0.55)', fontSize: '0.85vw' }}>
        Шаг: {formatGb(step)} • Рекомендуем: 4–8 GB для большинства сборок
      </Typography>
    </Box>
  );
};

export default MemorySlider;