import React, { useState, useEffect, useRef } from 'react';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faEdit, faTrash, faTimes } from '@fortawesome/free-solid-svg-icons';
import { faMarkdown } from '@fortawesome/free-brands-svg-icons';
import PropTypes from 'prop-types';

const FileList = ({ files, onFileClick, onSaveEdit, onFileDelete }) => {
    const [editStatus, setEditStatus] = useState(false);
    const [value, setValue] = useState('');
    let node = useRef(null);

    useEffect(() => {
        const handleInputEvent = (event) => {
            const { keyCode } = event;
            if (keyCode === 13 && editStatus) {
                const editItem = files.find(file => file.id === editStatus);
                onSaveEdit(editItem.id, value);
                closeSearch(event);
            }
            if (keyCode === 27 && editStatus) {
                closeSearch(event);
            }
        };
        document.addEventListener('keyup', handleInputEvent);
        return () => {
            document.removeEventListener('keyup', handleInputEvent);
        };
    });

    useEffect(() => {
        node.current && editStatus && node.current.focus();
    }, [editStatus]);


    const closeSearch = (event) => {
        event.preventDefault();
        setEditStatus(false);
        setValue('');
    };

    return (
        <ul className='list-group list-group-flush file-list'>
            {
                files.map(file => (
                    <li className='list-group-item bg-light row d-flex align-item-center file-item' key={file.id}>
                        {
                            file.id !== editStatus && (
                                <>
                                    <span className='col-2'><FontAwesomeIcon icon={faMarkdown} size='lg' /></span>
                                    <span className='col-8 c-link' onClick={() => onFileClick(file.id)}>{file.title}</span>
                                    <button
                                        type='button'
                                        className='icon-button col-1'
                                        onClick={() => {
                                            setEditStatus(file.id);
                                            setValue(file.title);
                                        }}
                                    >
                                        <FontAwesomeIcon icon={faEdit} title="编辑" size='lg' />
                                    </button>
                                    <button
                                        type='button'
                                        className='icon-button col-1'
                                        onClick={() => onFileDelete(file.id)}
                                    >
                                        <FontAwesomeIcon icon={faTrash} title="删除" size='lg' />
                                    </button>
                                </>
                            )
                        }
                        {
                            file.id === editStatus && (
                                <>
                                    <div className='col-10'>
                                        <input
                                            className='form-control'
                                            value={value}
                                            onChange={(e) => setValue(e.target.value)}
                                            ref={node}
                                        />
                                    </div>

                                    <button
                                        type='button'
                                        className='icon-button col-2'
                                        onClick={closeSearch}
                                    >
                                        <FontAwesomeIcon icon={faTimes} title="关闭" size='lg' />
                                    </button>
                                </>
                            )
                        }
                    </li>
                ))
            }
        </ul>
    );
};

FileList.propTypes = {
    files: PropTypes.array,
    onFileClick: PropTypes.func,
    onFileDelete: PropTypes.func,
    onSaveEdit: PropTypes.func,
};

export default FileList;


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