import React from "react";
import { WithTranslation, withTranslation } from "react-i18next";
import { apiClient, ErrorNotification, Loading, SyntaxHighlighter } from "@scm-manager/ui-components";
import { File } from "@scm-manager/ui-types";

type Props = WithTranslation & {
  file: File;
  language: string;
};

type State = {
  content: string;
  error?: Error;
  loaded: boolean;
};

class SourcecodeViewer extends React.Component<Props, State> {
  constructor(props: Props) {
    super(props);

    this.state = {
      content: "",
      loaded: false
    };
  }

  componentDidMount() {
    const { file } = this.props;
    getContent(file._links.self.href)
      .then(result => {
        if (result.error) {
          this.setState({
            ...this.state,
            error: result.error,
            loaded: true
          });
        } else {
          this.setState({
            ...this.state,
            content: result,
            loaded: true
          });
        }
      })
      .catch(err => {});
  }

  render() {
    const { content, error, loaded } = this.state;
    const language = this.props.language;

    if (error) {
      return <ErrorNotification error={error} />;
    }

    if (!loaded) {
      return <Loading />;
    }

    if (!content) {
      return null;
    }

    return <SyntaxHighlighter language={getLanguage(language)} value={content} />;
  }
}

export function getLanguage(language: string) {
  return language.toLowerCase();
}

export function getContent(url: string) {
  return apiClient
    .get(url)
    .then(response => response.text())
    .then(response => {
      return response;
    })
    .catch(err => {
      return {
        error: err
      };
    });
}

export default withTranslation("repos")(SourcecodeViewer);