import { type Host, Request } from "@app/api";
import type { Author } from "@app/cobs";

export interface TimelineItem {
  person: Author;
  message: string;
  timestamp: number;
}

export interface IIssue {
  id: string;
  author: Author;
  title: string;
  state: State;
  comment: Comment;
  discussion: Thread[];
  labels: Label[];
  timestamp: number;
}

export type State =
  | {
      status: "open";
    }
  | {
      status: "closed";
      reason: string;
    };

export interface Comment<R = null> {
  author: Author;
  body: string;
  reactions: Record<string, number>;
  timestamp: number;
  replies: R;
}

export type Thread = Comment<Comment[]>;

export type Label = string;

export function groupIssues(issues: Issue[]): {
  open: Issue[];
  closed: Issue[];
} {
  return issues.reduce(
    (acc, issue) => {
      acc[issue.state.status].push(issue);
      return acc;
    },
    { open: [] as Issue[], closed: [] as Issue[] },
  );
}

export class Issue {
  id: string;
  author: Author;
  title: string;
  state: State;
  comment: Comment;
  discussion: Thread[];
  labels: Label[];
  timestamp: number;

  constructor(issue: IIssue) {
    this.id = issue.id;
    this.author = issue.author;
    this.title = issue.title;
    this.state = issue.state;
    this.comment = issue.comment;
    this.discussion = issue.discussion;
    this.labels = issue.labels;
    this.timestamp = issue.timestamp;
  }

  // Counts the amount of comments and replies in a discussion
  countComments(): number {
    return this.discussion.reduce((acc, comment) => {
      if (comment.replies) return acc + comment.replies.length + 1; // We add all replies and 1 forathe comment in this loop.
      return acc + 1; // If there are no replies, we simply add 1 for the comment in this loop.
    }, 0);
  }

  static async getIssues(urn: string, host: Host): Promise<Issue[]> {
    const response: IIssue[] = await new Request(
      `projects/${urn}/issues`,
      host,
    ).get();
    return response.map(issue => new Issue(issue));
  }

  static async getIssue(
    urn: string,
    issue: string,
    host: Host,
  ): Promise<Issue> {
    const response: IIssue = await new Request(
      `projects/${urn}/issues/${issue}`,
      host,
    ).get();
    return new Issue(response);
  }
}