// @flow

import React from "react";
import { Diff, Hunk, parseDiff } from "react-diff-view";
import { apiClient } from "@scm-manager/ui-components";

type Props = {
  namespace: string,
  name: string,
  revision: string
};

class ScmDiff extends React.Component<Props> {
  constructor(props: Props) {
    super(props);
    this.state = {};
  }

  componentDidMount() {
    const { namespace, name, revision } = this.props;
    const url = `http://localhost:8081/scm/api/rest/v2/repositories/${namespace}/${name}/diff/${revision}`;
    apiClient
      .get(url)
      .then(response => response.text())
      .then(text => this.setState({ diff: text }))
      .catch(error => this.setState({ error }));
  }

  render() {
    if (!this.state.diff || this.state.diff === "") {
      return null;
    }
    const files = parseDiff(this.state.diff);
    return (
      <div>
        {files.map(({ hunks }, i) => (
          <Diff key={i} hunks={hunks} viewType="unified" />
        ))}
      </div>
    );
  }
}

export default ScmDiff;