/*
 * UnitCommitment.jl: Optimization Package for Security-Constrained Unit Commitment
 * Copyright (C) 2020-2025, UChicago Argonne, LLC. All rights reserved.
 * Released under the modified BSD license. See COPYING.md for more details.
 */

import React, { Component } from "react";

class FileUploadElement extends Component<any> {
  private inputRef = React.createRef<HTMLInputElement>();
  private callback: (data: any) => void = () => {};

  showFilePicker = (callback: (data: any) => void) => {
    this.callback = callback;
    this.inputRef.current?.click();
  };

  onFileSelected = (event: React.ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files![0];
    if (file) {
      const reader = new FileReader();
      reader.onload = async (e) => {
        this.callback(e.target?.result as string);
        this.callback = () => {};
      };
      reader.readAsText(file);
    }
    event.target.value = "";
  };

  override render() {
    return (
      <input
        ref={this.inputRef}
        type="file"
        accept={this.props.accept}
        style={{ display: "none" }}
        onChange={this.onFileSelected}
      />
    );
  }
}

export default FileUploadElement;