// This file contains types and functions related to interacting with the API.

export interface NewPost {
  content: string;
  token: string;
}

interface Votes {
  up: number;
  down: number;
}

export interface Post extends NewPost {
  id: string;
  createdAt: string;
  updatedAt: string;
  votes: Votes;
}

export interface NewComment {
  content: string;
  user_token: string;
  parent_post_id: number;
  parent_comment_id?: number;
}

export interface Comment extends NewComment {
  content: string;
  token: string;
}

// This is what the login and registration responses look like
export interface AuthResponse {
  username: string;
  token: string;
}

// This is what a public comment looks like, as it arrives from the server
export interface PublicComment {
  id: number;
  parent_post_id: number;
  parent_comment_id: number | null;
  content: string;
  created_at: string;
  updated_at: string;
}

export async function getPosts(): Promise<Post[]> {
  const res = await fetch("/api/posts");
  const data = await res.json();
  return data;
}

export async function getPost(id: string): Promise<Post> {
  const res = await fetch(`/api/posts/${id}`);
  const data = await res.json();
  return data;
}

export async function createPost(post: NewPost): Promise<void> {
  await fetch("/api/posts", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify(post),
  });
}

export async function createComment(comment: NewComment): Promise<void> {
  await fetch("/api/comments", {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
    },
    body: JSON.stringify(comment),
  });
}

// Gets the comments for a specific post
export async function getComments(
  postId: string,
  limit: number,
  offset: number
): Promise<PublicComment[]> {
  const res = await fetch(
    `/api/comments?post_id=${postId}&limit=${limit}&offset=${offset}`
  );
  const data = await res.json();
  return data;
}

/** Incomplete */
export async function engagePost(postId: string): Promise<void> {
  const res = await fetch(`/api/engage_post?post_id=${postId}`);
  const data = await res.json();
  return data;
}

// Send the registration request to the server
export async function submitRegistration(
  username: string,
  password: string,
  captcha: string
): Promise<AuthResponse | undefined> {
  const response = await fetch("/api/register", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ username, password, captcha }),
  });

  if (response.ok) return await response.json();
}

// Send the login request to the server
export async function submitLogin(
  username: string,
  password: string
): Promise<AuthResponse | undefined> {
  if (username == "" || password == "") return;
  const response = await fetch("/api/login", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ username, password }),
  });

  if (response.ok) return await response.json();
}
/**
 * Engage with a post.
 * @param postId The id of the post to engage with.
 * @param token The token of the user engaging with the post.
 * @returns {Promise<Response>} A promise that resolves to a Response object.
 */
export async function engage(postId: string, token: string): Promise<Response> {
  return await fetch(`/api/posts/${postId}/engage`, {
    method: "POST",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${token}`,
    },
  });
}