'use client';

import { useState, useCallback, useRef, useEffect } from 'react';

export interface SearchResult {
  id: string;
  type: 'image' | 'video' | 'link' | 'note';
  title: string;
  description: string;
  url: string;
  tags: string[];
  source: string;
  dateAdded: string;
  collection: string;
  thumbnail: string;
}

export interface SearchResponse {
  results: SearchResult[];
  total: number;
  query: string;
  searchTime?: string;
  message?: string;
}

export interface SearchState {
  query: string;
  results: SearchResult[];
  isLoading: boolean;
  error: string | null;
  hasSearched: boolean;
  total: number;
  searchTime: string | null;
}

export interface SearchOptions {
  type?: 'image' | 'video' | 'link' | 'note' | 'all';
  limit?: number;
}

export function useSearch() {
  const [state, setState] = useState<SearchState>({
    query: '',
    results: [],
    isLoading: false,
    error: null,
    hasSearched: false,
    total: 0,
    searchTime: null,
  });

  const debounceTimeoutRef = useRef<NodeJS.Timeout>();
  const abortControllerRef = useRef<AbortController>();

  const search = useCallback(async (
    query: string, 
    options: SearchOptions = {}
  ) => {
    // Clear previous timeout
    if (debounceTimeoutRef.current) {
      clearTimeout(debounceTimeoutRef.current);
    }

    // Cancel previous request
    if (abortControllerRef.current) {
      abortControllerRef.current.abort();
    }

    // Create new abort controller
    abortControllerRef.current = new AbortController();

    // Debounce search to avoid too many API calls
    return new Promise<SearchResponse>((resolve, reject) => {
      debounceTimeoutRef.current = setTimeout(async () => {
        if (!query.trim()) {
          setState(prev => ({
            ...prev,
            query: '',
            results: [],
            isLoading: false,
            error: null,
            hasSearched: false,
            total: 0,
            searchTime: null,
          }));
          resolve({ results: [], total: 0, query: '' });
          return;
        }

        setState(prev => ({
          ...prev,
          query: query.trim(),
          isLoading: true,
          error: null,
        }));

        try {
          const searchParams = new URLSearchParams({
            q: query.trim(),
            type: options.type || 'all',
            limit: (options.limit || 20).toString(),
          });

          const response = await fetch(`/api/search?${searchParams}`, {
            signal: abortControllerRef.current?.signal,
          });

          if (!response.ok) {
            throw new Error(`Search failed: ${response.statusText}`);
          }

          const data: SearchResponse = await response.json();

          setState(prev => ({
            ...prev,
            results: data.results,
            isLoading: false,
            hasSearched: true,
            total: data.total,
            searchTime: data.searchTime || null,
            error: null,
          }));

          resolve(data);
        } catch (error) {
          if (error instanceof Error && error.name === 'AbortError') {
            // Request was cancelled, don't update state
            return;
          }

          const errorMessage = error instanceof Error ? error.message : 'Search failed';
          
          setState(prev => ({
            ...prev,
            isLoading: false,
            error: errorMessage,
          }));

          reject(error);
        }
      }, 300); // 300ms debounce
    });
  }, []);

  // Clear search results
  const clearSearch = useCallback(() => {
    setState({
      query: '',
      results: [],
      isLoading: false,
      error: null,
      hasSearched: false,
      total: 0,
      searchTime: null,
    });
  }, []);

  // Cleanup on unmount
  useEffect(() => {
    return () => {
      if (debounceTimeoutRef.current) {
        clearTimeout(debounceTimeoutRef.current);
      }
      if (abortControllerRef.current) {
        abortControllerRef.current.abort();
      }
    };
  }, []);

  return {
    ...state,
    search,
    clearSearch,
  };
}