import { TwitterAuth } from './auth';
import { updateCookieJar } from './requests';

export interface DirectMessage {
  id: string;
  text: string;
  senderId: string;
  recipientId: string;
  createdAt: string;
  mediaUrls?: string[];
  senderScreenName?: string;
  recipientScreenName?: string;
}

export interface DirectMessageConversation {
  conversationId: string;
  messages: DirectMessage[];
  participants: {
    id: string;
    screenName: string;
  }[];
}

export interface DirectMessageEvent {
  id: string;
  type: string;
  message_create: {
    sender_id: string;
    target: {
      recipient_id: string;
    };
    message_data: {
      text: string;
      created_at: string;
      entities?: {
        urls?: Array<{
          url: string;
          expanded_url: string;
          display_url: string;
        }>;
        media?: Array<{
          url: string;
          type: string;
        }>;
      };
    };
  };
}

export interface DirectMessagesResponse {
  conversations: DirectMessageConversation[];
  users: TwitterUser[];
  cursor?: string;
  lastSeenEventId?: string;
  trustedLastSeenEventId?: string;
  untrustedLastSeenEventId?: string;
  inboxTimelines?: {
    trusted?: {
      status: string;
      minEntryId?: string;
    };
    untrusted?: {
      status: string;
      minEntryId?: string;
    };
  };
  userId: string;
}

export interface TwitterUser {
  id: string;
  screenName: string;
  name: string;
  profileImageUrl: string;
  description?: string;
  verified?: boolean;
  protected?: boolean;
  followersCount?: number;
  friendsCount?: number;
}

export interface SendDirectMessageResponse {
  entries: {
    message: {
      id: string;
      time: string;
      affects_sort: boolean;
      conversation_id: string;
      message_data: {
        id: string;
        time: string;
        recipient_id: string;
        sender_id: string;
        text: string;
      };
    };
  }[];
  users: Record<string, TwitterUser>;
}

function parseDirectMessageConversations(
  data: any,
  userId: string,
): DirectMessagesResponse {
  try {
    const inboxState = data?.inbox_initial_state;
    const conversations = inboxState?.conversations || {};
    const entries = inboxState?.entries || [];
    const users = inboxState?.users || {};

    // Parse users first
    const parsedUsers: TwitterUser[] = Object.values(users).map(
      (user: any) => ({
        id: user.id_str,
        screenName: user.screen_name,
        name: user.name,
        profileImageUrl: user.profile_image_url_https,
        description: user.description,
        verified: user.verified,
        protected: user.protected,
        followersCount: user.followers_count,
        friendsCount: user.friends_count,
      }),
    );

    // Group messages by conversation_id
    const messagesByConversation: Record<string, any[]> = {};
    entries.forEach((entry: any) => {
      if (entry.message) {
        const convId = entry.message.conversation_id;
        if (!messagesByConversation[convId]) {
          messagesByConversation[convId] = [];
        }
        messagesByConversation[convId].push(entry.message);
      }
    });

    // Convert to DirectMessageConversation array
    const parsedConversations = Object.entries(conversations).map(
      ([convId, conv]: [string, any]) => {
        const messages = messagesByConversation[convId] || [];

        // Sort messages by time in ascending order
        messages.sort((a, b) => Number(a.time) - Number(b.time));

        return {
          conversationId: convId,
          messages: parseDirectMessages(messages, users),
          participants: conv.participants.map((p: any) => ({
            id: p.user_id,
            screenName: users[p.user_id]?.screen_name || p.user_id,
          })),
        };
      },
    );

    return {
      conversations: parsedConversations,
      users: parsedUsers,
      cursor: inboxState?.cursor,
      lastSeenEventId: inboxState?.last_seen_event_id,
      trustedLastSeenEventId: inboxState?.trusted_last_seen_event_id,
      untrustedLastSeenEventId: inboxState?.untrusted_last_seen_event_id,
      inboxTimelines: {
        trusted: inboxState?.inbox_timelines?.trusted && {
          status: inboxState.inbox_timelines.trusted.status,
          minEntryId: inboxState.inbox_timelines.trusted.min_entry_id,
        },
        untrusted: inboxState?.inbox_timelines?.untrusted && {
          status: inboxState.inbox_timelines.untrusted.status,
          minEntryId: inboxState.inbox_timelines.untrusted.min_entry_id,
        },
      },
      userId,
    };
  } catch (error) {
    console.error('Error parsing DM conversations:', error);
    return {
      conversations: [],
      users: [],
      userId,
    };
  }
}

function parseDirectMessages(messages: any[], users: any): DirectMessage[] {
  try {
    return messages.map((msg: any) => ({
      id: msg.message_data.id,
      text: msg.message_data.text,
      senderId: msg.message_data.sender_id,
      recipientId: msg.message_data.recipient_id,
      createdAt: msg.message_data.time,
      mediaUrls: extractMediaUrls(msg.message_data),
      senderScreenName: users[msg.message_data.sender_id]?.screen_name,
      recipientScreenName: users[msg.message_data.recipient_id]?.screen_name,
    }));
  } catch (error) {
    console.error('Error parsing DMs:', error);
    return [];
  }
}

function extractMediaUrls(messageData: any): string[] | undefined {
  const urls: string[] = [];

  // Extract URLs from entities if they exist
  if (messageData.entities?.urls) {
    messageData.entities.urls.forEach((url: any) => {
      urls.push(url.expanded_url);
    });
  }

  // Extract media URLs if they exist
  if (messageData.entities?.media) {
    messageData.entities.media.forEach((media: any) => {
      urls.push(media.media_url_https || media.media_url);
    });
  }

  return urls.length > 0 ? urls : undefined;
}

export async function getDirectMessageConversations(
  userId: string,
  auth: TwitterAuth,
  cursor?: string,
): Promise<DirectMessagesResponse> {
  if (!auth.isLoggedIn()) {
    throw new Error('Authentication required to fetch direct messages');
  }

  const url =
    'https://twitter.com/i/api/graphql/7s3kOODhC5vgXlO0OlqYdA/DMInboxTimeline';
  const messageListUrl = 'https://x.com/i/api/1.1/dm/inbox_initial_state.json';

  const params = new URLSearchParams();

  if (cursor) {
    params.append('cursor', cursor);
  }

  const finalUrl = `${messageListUrl}${
    params.toString() ? '?' + params.toString() : ''
  }`;
  const cookies = await auth.cookieJar().getCookies(url);
  const xCsrfToken = cookies.find((cookie) => cookie.key === 'ct0');

  const headers = new Headers({
    authorization: `Bearer ${(auth as any).bearerToken}`,
    cookie: await auth.cookieJar().getCookieString(url),
    'content-type': 'application/json',
    'User-Agent':
      'Mozilla/5.0 (Linux; Android 11; Nokia G20) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.88 Mobile Safari/537.36',
    'x-guest-token': (auth as any).guestToken,
    'x-twitter-auth-type': 'OAuth2Client',
    'x-twitter-active-user': 'yes',
    'x-csrf-token': xCsrfToken?.value as string,
  });

  const response = await fetch(finalUrl, {
    method: 'GET',
    headers,
  });

  await updateCookieJar(auth.cookieJar(), response.headers);

  if (!response.ok) {
    throw new Error(await response.text());
  }

  // parse the response
  const data = await response.json();
  return parseDirectMessageConversations(data, userId);
}

export async function sendDirectMessage(
  auth: TwitterAuth,
  conversation_id: string,
  text: string,
): Promise<SendDirectMessageResponse> {
  if (!auth.isLoggedIn()) {
    throw new Error('Authentication required to send direct messages');
  }

  const url =
    'https://twitter.com/i/api/graphql/7s3kOODhC5vgXlO0OlqYdA/DMInboxTimeline';
  const messageDmUrl = 'https://x.com/i/api/1.1/dm/new2.json';

  const cookies = await auth.cookieJar().getCookies(url);
  const xCsrfToken = cookies.find((cookie) => cookie.key === 'ct0');

  const headers = new Headers({
    authorization: `Bearer ${(auth as any).bearerToken}`,
    cookie: await auth.cookieJar().getCookieString(url),
    'content-type': 'application/json',
    'User-Agent':
      'Mozilla/5.0 (Linux; Android 11; Nokia G20) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.88 Mobile Safari/537.36',
    'x-guest-token': (auth as any).guestToken,
    'x-twitter-auth-type': 'OAuth2Client',
    'x-twitter-active-user': 'yes',
    'x-csrf-token': xCsrfToken?.value as string,
  });

  const payload = {
    conversation_id: `${conversation_id}`,
    recipient_ids: false,
    text: text,
    cards_platform: 'Web-12',
    include_cards: 1,
    include_quote_count: true,
    dm_users: false,
  };

  const response = await fetch(messageDmUrl, {
    method: 'POST',
    headers,
    body: JSON.stringify(payload),
  });

  await updateCookieJar(auth.cookieJar(), response.headers);

  if (!response.ok) {
    throw new Error(await response.text());
  }

  return await response.json();
}