import React, { useState, useEffect, useRef } from 'react';
import { Search } from 'lucide-react';
import { searchOrgCourses } from '@services/courses/courses';
import { useLHSession } from '@components/Contexts/LHSessionContext';
import Link from 'next/link';
import { getCourseThumbnailMediaDirectory } from '@services/media/media';
import { useDebounce } from '@/hooks/useDebounce';
import { useOrg } from '@components/Contexts/OrgContext';
import { getUriWithOrg } from '@services/config/config';
import { removeCoursePrefix } from '../Thumbnails/CourseThumbnail';

interface Course {
  name: string;
  description: string;
  thumbnail_image: string;
  course_uuid: string;
  authors: Array<{
    first_name: string;
    last_name: string;
    avatar_image: string;
  }>;
}

interface SearchBarProps {
  orgslug: string;
  className?: string;
  isMobile?: boolean;
}

export const SearchBar: React.FC<SearchBarProps> = ({ orgslug, className = '', isMobile = false }) => {
  const org = useOrg() as any;
  const [searchQuery, setSearchQuery] = useState('');
  const [courses, setCourses] = useState<Course[]>([]);
  const [isLoading, setIsLoading] = useState(false);
  const [showResults, setShowResults] = useState(false);
  const searchRef = useRef<HTMLDivElement>(null);
  const session = useLHSession() as any;

  const debouncedSearchFunction = useDebounce(async (query: string) => {
    if (query.trim().length === 0) {
      setCourses([]);
      return;
    }

    setIsLoading(true);
    try {
      const results = await searchOrgCourses(
        orgslug,
        query,
        1,
        5,
        null,
        session?.data?.tokens?.access_token
      );
      setCourses(results);
    } catch (error) {
      console.error('Error searching courses:', error);
      setCourses([]);
    }
    setIsLoading(false);
  }, 300);

  useEffect(() => {
    const handleClickOutside = (event: MouseEvent) => {
      if (searchRef.current && !searchRef.current.contains(event.target as Node)) {
        setShowResults(false);
      }
    };

    document.addEventListener('mousedown', handleClickOutside);
    return () => document.removeEventListener('mousedown', handleClickOutside);
  }, []);

  useEffect(() => {
    debouncedSearchFunction(searchQuery);
  }, [searchQuery, debouncedSearchFunction]);

  const handleSearchFocus = () => {
    if (searchQuery.trim().length > 0) {
      setShowResults(true);
    }
  };

  return (
    <div ref={searchRef} className={`relative ${className}`}>
      <div className="relative">
        <input
          type="text"
          value={searchQuery}
          onChange={(e) => {
            setSearchQuery(e.target.value);
            setShowResults(true);
          }}
          onFocus={handleSearchFocus}
          placeholder="Search courses..."
          className="w-full h-9 pl-10 pr-4 rounded-lg border border-gray-200 bg-white/50 focus:outline-hidden focus:ring-2 focus:ring-gray-200 focus:border-transparent text-sm placeholder:text-gray-400"
        />
        <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 text-gray-400" size={18} />
      </div>

      {showResults && (searchQuery.trim().length > 0 || isLoading) && (
        <div className={`absolute z-50 w-full mt-2 bg-white rounded-lg shadow-lg border border-gray-100 max-h-[400px] overflow-y-auto ${isMobile ? 'max-w-full' : 'min-w-[400px]'}`}>
          {isLoading ? (
            <div className="p-4 text-center text-gray-500">
              <div className="animate-pulse">Searching...</div>
            </div>
          ) : courses.length > 0 ? (
            <div className="py-2">
              {courses.map((course) => (
                <Link
                  key={course.course_uuid}
                  prefetch
                  href={getUriWithOrg(orgslug, `/course/${removeCoursePrefix(course.course_uuid)}`)}
                  className="block hover:bg-gray-50 transition-colors"
                  onClick={() => setShowResults(false)}
                >
                  <div className="flex items-center p-3 space-x-3">
                    {course.thumbnail_image && (
                      <img
                        src={getCourseThumbnailMediaDirectory(org?.org_uuid, course.course_uuid, course.thumbnail_image)}
                        alt={course.name}
                        className="w-12 h-12 object-cover rounded-lg"
                      />
                    )}
                    <div className="flex-1 min-w-0">
                      <h3 className="text-sm font-medium text-gray-900 truncate">{course.name}</h3>
                      <p className="text-xs text-gray-500 truncate">{course.description}</p>
                      {course.authors && course.authors[0] && (
                        <p className="text-xs text-gray-400 mt-1">
                          by {course.authors[0].first_name} {course.authors[0].last_name}
                        </p>
                      )}
                    </div>
                  </div>
                </Link>
              ))}
            </div>
          ) : (
            <div className="p-4 text-center text-gray-500">
              No courses found
            </div>
          )}
        </div>
      )}
    </div>
  );
};