import type { AbstractConstructor, Mixin, TwitterClientBase } from './twitter-client-base.js';
import { TWITTER_API_BASE } from './twitter-client-constants.js';
import { buildUserTweetsFeatures } from './twitter-client-features.js';
import type { GraphqlTweetResult, SearchResult, TweetData } from './twitter-client-types.js';
import { extractCursorFromInstructions, parseTweetsFromInstructions } from './twitter-client-utils.js';

/** Options for user tweets fetch methods */
export interface UserTweetsFetchOptions {
  /** Include raw GraphQL response in `_raw` field */
  includeRaw?: boolean;
}

/** Options for paginated user tweets fetch */
export interface UserTweetsPaginationOptions extends UserTweetsFetchOptions {
  /** Maximum number of pages to fetch (default: 1) */
  maxPages?: number;
  /** Starting cursor for pagination (resume from previous fetch) */
  cursor?: string;
  /** Delay in milliseconds between page fetches (default: 1000) */
  pageDelayMs?: number;
}

export interface TwitterClientUserTweetsMethods {
  getUserTweets(userId: string, count?: number, options?: UserTweetsFetchOptions): Promise<SearchResult>;
  getUserTweetsPaged(userId: string, limit: number, options?: UserTweetsPaginationOptions): Promise<SearchResult>;
}

export function withUserTweets<TBase extends AbstractConstructor<TwitterClientBase>>(
  Base: TBase,
): Mixin<TBase, TwitterClientUserTweetsMethods> {
  abstract class TwitterClientUserTweets extends Base {
    // biome-ignore lint/complexity/noUselessConstructor lint/suspicious/noExplicitAny: TS mixin constructor requirement.
    constructor(...args: any[]) {
      super(...args);
    }

    private async getUserTweetsQueryIds(): Promise<string[]> {
      const primary = await this.getQueryId('UserTweets');
      // Fallback query ID observed from web client
      return Array.from(new Set([primary, 'Wms1GvIiHXAPBaCr9KblaA']));
    }

    /**
     * Get tweets from a user's profile timeline (single page).
     */
    async getUserTweets(userId: string, count = 20, options: UserTweetsFetchOptions = {}): Promise<SearchResult> {
      return this.getUserTweetsPaged(userId, count, options);
    }

    /**
     * Get tweets from a user's profile timeline with pagination support.
     */
    async getUserTweetsPaged(
      userId: string,
      limit: number,
      options: UserTweetsPaginationOptions = {},
    ): Promise<SearchResult> {
      if (!Number.isFinite(limit) || limit <= 0) {
        return { success: false, error: `Invalid limit: ${limit}` };
      }

      const { includeRaw = false, maxPages, pageDelayMs = 1000 } = options;
      const features = buildUserTweetsFeatures();
      const pageSize = 20;
      const seen = new Set<string>();
      const tweets: TweetData[] = [];
      let cursor: string | undefined = options.cursor;
      let nextCursor: string | undefined;
      let pagesFetched = 0;
      const hardMaxPages = 10;
      const computedMaxPages = Math.max(1, Math.ceil(limit / pageSize));
      const effectiveMaxPages = Math.min(hardMaxPages, maxPages ?? computedMaxPages);

      const fetchPage = async (pageCount: number, pageCursor?: string) => {
        let lastError: string | undefined;
        let had404 = false;
        const queryIds = await this.getUserTweetsQueryIds();

        const variables = {
          userId,
          count: pageCount,
          includePromotedContent: false, // Filter out ads
          withQuickPromoteEligibilityTweetFields: true,
          withVoice: true,
          ...(pageCursor ? { cursor: pageCursor } : {}),
        };

        const fieldToggles = {
          withArticlePlainText: false,
        };

        const params = new URLSearchParams({
          variables: JSON.stringify(variables),
          features: JSON.stringify(features),
          fieldToggles: JSON.stringify(fieldToggles),
        });

        for (const queryId of queryIds) {
          const url = `${TWITTER_API_BASE}/${queryId}/UserTweets?${params.toString()}`;

          try {
            const response = await this.fetchWithTimeout(url, {
              method: 'GET',
              headers: this.getHeaders(),
            });

            if (response.status === 404) {
              had404 = true;
              lastError = `HTTP ${response.status}`;
              continue;
            }

            if (!response.ok) {
              const text = await response.text();
              return { success: false as const, error: `HTTP ${response.status}: ${text.slice(0, 200)}`, had404 };
            }

            const data = (await response.json()) as {
              data?: {
                user?: {
                  result?: {
                    timeline?: {
                      timeline?: {
                        instructions?: Array<{
                          type?: string;
                          entries?: Array<{
                            content?: {
                              itemContent?: {
                                tweet_results?: {
                                  result?: GraphqlTweetResult;
                                };
                              };
                              item?: {
                                itemContent?: {
                                  tweet_results?: {
                                    result?: GraphqlTweetResult;
                                  };
                                };
                              };
                              items?: Array<{
                                item?: {
                                  itemContent?: {
                                    tweet_results?: {
                                      result?: GraphqlTweetResult;
                                    };
                                  };
                                };
                                itemContent?: {
                                  tweet_results?: {
                                    result?: GraphqlTweetResult;
                                  };
                                };
                                content?: {
                                  itemContent?: {
                                    tweet_results?: {
                                      result?: GraphqlTweetResult;
                                    };
                                  };
                                };
                              }>;
                              cursorType?: string;
                              value?: string;
                            };
                          }>;
                        }>;
                      };
                    };
                  };
                };
              };
              errors?: Array<{ message: string }>;
            };

            if (data.errors && data.errors.length > 0) {
              // Check for common errors
              const errorMsg = data.errors.map((e) => e.message).join(', ');
              if (errorMsg.includes('User has been suspended') || errorMsg.includes('User not found')) {
                return { success: false as const, error: errorMsg, had404 };
              }
              // Some errors are non-fatal if we got data
              if (!data.data?.user?.result?.timeline?.timeline?.instructions) {
                return { success: false as const, error: errorMsg, had404 };
              }
            }

            const instructions = data.data?.user?.result?.timeline?.timeline?.instructions;
            const pageTweets = parseTweetsFromInstructions(instructions, { quoteDepth: this.quoteDepth, includeRaw });
            const pageCursorValue = extractCursorFromInstructions(instructions);

            return { success: true as const, tweets: pageTweets, cursor: pageCursorValue, had404 };
          } catch (error) {
            lastError = error instanceof Error ? error.message : String(error);
          }
        }

        return { success: false as const, error: lastError ?? 'Unknown error fetching user tweets', had404 };
      };

      const fetchWithRefresh = async (pageCount: number, pageCursor?: string) => {
        const firstAttempt = await fetchPage(pageCount, pageCursor);
        if (firstAttempt.success) {
          return firstAttempt;
        }
        if (firstAttempt.had404) {
          await this.refreshQueryIds();
          const secondAttempt = await fetchPage(pageCount, pageCursor);
          if (secondAttempt.success) {
            return secondAttempt;
          }
          return { success: false as const, error: secondAttempt.error };
        }
        return { success: false as const, error: firstAttempt.error };
      };

      while (tweets.length < limit) {
        // Add delay between pages (but not before the first page)
        if (pagesFetched > 0 && pageDelayMs > 0) {
          await this.sleep(pageDelayMs);
        }

        const remaining = limit - tweets.length;
        const pageCount = Math.min(pageSize, remaining);
        const page = await fetchWithRefresh(pageCount, cursor);
        if (!page.success) {
          return { success: false, error: page.error };
        }
        pagesFetched += 1;

        let added = 0;
        for (const tweet of page.tweets) {
          if (seen.has(tweet.id)) {
            continue;
          }
          seen.add(tweet.id);
          tweets.push(tweet);
          added += 1;
          if (tweets.length >= limit) {
            break;
          }
        }

        const pageCursor = page.cursor;
        if (!pageCursor || pageCursor === cursor || page.tweets.length === 0 || added === 0) {
          nextCursor = undefined;
          break;
        }

        if (pagesFetched >= effectiveMaxPages) {
          nextCursor = pageCursor;
          break;
        }

        cursor = pageCursor;
        nextCursor = pageCursor;
      }

      return { success: true, tweets, nextCursor };
    }
  }

  return TwitterClientUserTweets;
}