import { Box, Button, Divider, TextField, Typography } from '@mui/material';
import { useEffect, useState } from 'react';
import { PrimaryButton } from '../../components/common/Buttons/Buttons';
import Modal from '../../components/common/Modal/Modal';
import SelectWithOptions from '../AdminPanel/components/SelectWithOptions';

export const ModalCreateProject = ({
	open,
	onClose,
	onCreate,
	config = {},
	initialData = null,
	title = 'Создание проекта',
	buttonText = 'Создать',
}) => {
	const [projectData, setProjectData] = useState(() => {
		if (initialData) {
			return { ...initialData };
		}
		// Иначе создаем из конфига
		const data = {};
		Object.keys(config).forEach((key) => {
			data[key] = config[key].defaultValue;
		});
		return data;
	});

	const [errors, setErrors] = useState({});

	useEffect(() => {
		if (initialData) {
			setProjectData({ ...initialData });
		} else {
			const data = {};
			Object.keys(config).forEach((key) => {
				data[key] = config[key].defaultValue;
			});
			setProjectData(data);
		}
		setErrors({});
	}, [initialData, config, open]);

	const handleChange = (field, value) => {
		setProjectData((prev) => ({
			...prev,
			[field]: value,
		}));
		if (errors[field]) {
			setErrors((prev) => ({
				...prev,
				[field]: undefined,
			}));
		}
	};

	const validateField = (fieldName, config) => {
		const value = projectData[fieldName];

		if (config.required_field) {
			if (config.type === 'multiselect') {
				if (!value || (Array.isArray(value) && value.length === 0) || value === '') {
					return `Поле "${fieldName}" обязательно для заполнения`;
				}
			} else if (config.type === 'text') {
				if (!value || value.trim() === '') {
					return `Поле "${fieldName}" обязательно для заполнения`;
				}
			} else if (config.type === 'number') {
				if (value === null || value === undefined || value === '') {
					return `Поле "${fieldName}" обязательно для заполнения`;
				}
			}
		}

		if (config.type === 'number' && value !== null && value !== undefined && value !== '') {
			if (config.min !== undefined && Number(value) < config.min) {
				return `Значение должно быть не меньше ${config.min}`;
			}
			if (config.max !== undefined && Number(value) > config.max) {
				return `Значение должно быть не больше ${config.max}`;
			}
		}
		return null;
	};

	const validateAllFields = () => {
		const newErrors = {};
		let hasErrors = false;

		Object.entries(config).forEach(([fieldName, fieldConfig]) => {
			const error = validateField(fieldName, fieldConfig);
			if (error) {
				newErrors[fieldName] = error;
				hasErrors = true;
			}
		});

		setErrors(newErrors);
		return !hasErrors;
	};

	const handleClickCreate = () => {
		if (validateAllFields()) {
			onCreate(projectData);
			onClose();
		}
	};

	const handleClose = () => {
		const resetData = {};
		Object.keys(config).forEach((key) => {
			resetData[key] = config[key].defaultValue;
		});
		setProjectData(resetData);
		setErrors({});
		onClose();
	};

	const renderField = (fieldName, config) => {
		const hasError = !!errors[fieldName];
		const errorText = errors[fieldName];

		switch (config.type) {
			case 'multiselect':
				return (
					<Box key={fieldName} sx={{ mb: hasError ? '0.5rem' : 0 }}>
						<Typography
							className='gray-color'
							sx={{
								fontWeight: '400',
								fontSize: '0.75rem',
								paddingBottom: '.25rem',
								color: hasError ? 'var(--error-color, #d32f2f)' : 'var(--grey-dark)',
							}}>
							{fieldName}
							{config.required_field && <span style={{ color: 'var(--error-color, #d32f2f)', marginLeft: '4px' }}>*</span>}
						</Typography>
						<SelectWithOptions
							className='sameSize'
							value={projectData[fieldName] || ''}
							options={config.options}
							placeholder={config.placeholder}
							onChange={(value) => handleChange(fieldName, value)}
							width='28.25rem'
							style={{
								borderColor: hasError ? 'var(--error-color, #d32f2f)' : undefined,
								borderWidth: hasError ? '2px' : undefined,
							}}
						/>
						{hasError && (
							<Typography
								sx={{
									color: 'var(--error-color, #d32f2f)',
									fontSize: '0.75rem',
									marginTop: '4px',
								}}>
								{errorText}
							</Typography>
						)}
					</Box>
				);

			case 'text':
				return (
					<Box key={fieldName} sx={{ mb: hasError ? '0.5rem' : 0 }}>
						<Typography
							className='gray-color'
							sx={{
								fontWeight: '400',
								fontSize: '0.75rem',
								color: hasError ? 'var(--error-color, #d32f2f)' : 'var(--grey-dark)',
								paddingBottom: '.25rem',
							}}>
							{fieldName}
							{config.required_field && <span style={{ color: 'var(--error-color, #d32f2f)', marginLeft: '4px' }}>*</span>}
						</Typography>
						<TextField
							className='sameSize'
							value={projectData[fieldName] || ''}
							onChange={(e) => handleChange(fieldName, e.target.value)}
							placeholder={config.placeholder}
							size='small'
							error={hasError}
							helperText={hasError ? errorText : ''}
							FormHelperTextProps={{
								sx: {
									marginLeft: 0,
									fontSize: '0.75rem',
								},
							}}
						/>
					</Box>
				);

			case 'number':
				return (
					<Box key={fieldName} sx={{ mb: hasError ? '0.5rem' : 0 }}>
						<Typography
							className='gray-color'
							sx={{
								fontWeight: '400',
								fontSize: '0.75rem',
								color: hasError ? 'var(--error-color, #d32f2f)' : 'var(--grey-dark)',
								paddingBottom: '.25rem',
							}}>
							{fieldName}
							{config.required_field && <span style={{ color: 'var(--error-color, #d32f2f)', marginLeft: '4px' }}>*</span>}
						</Typography>
						<TextField
							className='sameSize'
							type='text'
							value={projectData[fieldName] || ''}
							onChange={(e) => {
								const inputValue = e.target.value;
								const isValidInput = /^\d*\.?\d*$/.test(inputValue) || inputValue === '';
								if (isValidInput) {
									handleChange(fieldName, inputValue);
								}
							}}
							placeholder={config.placeholder}
							size='small'
							error={hasError}
							helperText={hasError ? errorText : ''}
							slotProps={{
								htmlInput: {
									min: config.min,
									max: config.max || null,
									step: config.step || 1,
								},
							}}
							FormHelperTextProps={{
								sx: {
									marginLeft: 0,
									fontSize: '0.75rem',
								},
							}}
						/>
					</Box>
				);

			default:
				return null;
		}
	};

	return (
		<Modal
			title={title}
			open={open}
			onClose={handleClose}
			customSize={'43.75'}
			actions={
				<>
					<Button variant='grey' onClick={handleClose} style={{ height: '2.5rem' }}>
						Отменить
					</Button>
					<PrimaryButton variant='contained' onClick={handleClickCreate} style={{ height: '2.5rem' }}>
						{buttonText}
					</PrimaryButton>
				</>
			}>
			<Divider />
			<Box
				sx={{
					m: '1.25rem 0',
					display: 'flex',
					flexDirection: 'column',
					gap: '1.25rem',
					'& .sameSize': {
						minWidth: '39.75rem',
					},
					'& .sameSize.MuiInputBase-root, & .sameSize .MuiInputBase-root': {
						height: '2.69rem',
					},
					'& .gray-color': { color: '#4A5565' },
				}}>
				{Object.entries(config).map(([fieldName, config]) => renderField(fieldName, config))}
			</Box>
			<Divider />
		</Modal>
	);
};