// @flow
import React, {Component} from "react";
import {commitWeight, userWeightForPath} from "./commitUtils";
import type {CommitData, FileTree} from "./commitUtils";

export class UserExplorer extends Component<{
  selectedPath: string,
  selectedUser: ?string,
  onSelectUser: (newUser: string) => void,
  data: CommitData,
}> {
  render() {
    const weights = userWeightForPath(
      this.props.selectedPath,
      this.props.data,
      commitWeight
    );
    const sortedUserWeightTuples = Object.keys(weights)
      .map((k) => [k, weights[k]])
      .sort((a, b) => b[1] - a[1]);
    const entries = sortedUserWeightTuples.map((authorWeight) => {
      const [author, weight] = authorWeight;
      return <UserEntry userId={author} weight={weight} key={author} />;
    });
    return (
      <div className="user-explorer plugin-pane">
        <h3 style={{textAlign: "center"}}> User Explorer </h3>
        <div style={{marginLeft: 8, marginRight: 8}}>{entries}</div>
      </div>
    );
  }
}

/**
 * Record the cred earned by the user in a given scope.
 */
class UserEntry extends Component<{
  userId: string,
  weight: number,
}> {
  render() {
    return (
      <div className="user-entry">
        <span> {this.props.userId} </span>
        <span> {this.props.weight.toFixed(1)} </span>
      </div>
    );
  }
}