'use client'
import React, { useEffect, useState } from 'react';
import Link from 'next/link';
import { ChevronRight } from 'lucide-react';
import { FacultyService, TeamMember } from '../../lib/facultyData';

interface TeamListingProps {
  title?: string;
  onMemberClick?: (member: TeamMember) => void;
}

const GUIDES_FRIENDS_PATRONS_CATEGORIES = ['GUIDES', 'FRIENDS', 'PATRONS'];
const NON_CLICKABLE_CATEGORIES = ['TRAINEE_FELLOW', 'SUPPORT_TEAM', 'GUIDES', 'FRIENDS', 'PATRONS'];

const TeamListing: React.FC<TeamListingProps> = ({
  title = "Our Team",
  onMemberClick
}) => {
  const [teamMembers, setTeamMembers] = useState<TeamMember[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const loadFacultyData = async () => {
      try {
        setLoading(true);
        const faculty = await FacultyService.getAllFaculty();
        setTeamMembers(faculty);
        setError(null);
      } catch (err) {
        console.error('Failed to load faculty data:', err);
        setError('Failed to load faculty data. Please try again later.');
      } finally {
        setLoading(false);
      }
    };

    loadFacultyData();
  }, []);

  // Active faculty members only
  const facultyMembers = teamMembers.filter(member =>
    member.category === 'FACULTY' && member.status !== 'RETIRED'
  );

  // Active support team only
  const supportTeam = teamMembers.filter(member =>
    member.category === 'SUPPORT_TEAM' && member.status !== 'RETIRED'
  );

  // Active trainees and fellows only
  const traineesAndFellows = teamMembers.filter(member =>
    member.category === 'TRAINEE_FELLOW' && member.status !== 'RETIRED'
  );

  // Guides, Friends, Patrons — all three categories in one section
  const guidesFriendsPatrons = teamMembers.filter(member =>
    GUIDES_FRIENDS_PATRONS_CATEGORIES.includes(member.category) && member.status !== 'RETIRED'
  );

  // Alumni = RETIRED (any category) + RESIGNED (any status)
  const alumniStaff = teamMembers.filter(member =>
    member.status === 'RETIRED' || member.category === 'RESIGNED'
  );

  const handleMemberClick = (member: TeamMember) => {
    if (onMemberClick) {
      onMemberClick(member);
    } else {
      window.location.href = `/faculty/${member.professorId}`;
    }
  };

  if (loading) {
    return (
      <div className="min-h-screen flex items-center justify-center">
        <div className="text-center">
          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-blue-600 mx-auto mb-4"></div>
          <p>Loading faculty data...</p>
        </div>
      </div>
    );
  }

  if (error) {
    return (
      <div className="min-h-screen flex items-center justify-center">
        <div className="text-center">
          <p className="text-red-600 mb-4">{error}</p>
          <button
            onClick={() => window.location.reload()}
            className="px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700"
          >
            Retry
          </button>
        </div>
      </div>
    );
  }

  const TeamMemberCard: React.FC<{ member: TeamMember }> = ({ member }) => {
    const [imageError, setImageError] = useState(false);
    const [imageLoading, setImageLoading] = useState(true);

    const isNonClickable = NON_CLICKABLE_CATEGORIES.includes(member.category);
    const isRetired = member.status === 'RETIRED';
    const isResigned = member.category === 'RESIGNED';

    // Check if image URL is valid and not a default placeholder
    const hasValidImage =
      member.image &&
      member.image.trim() !== '' &&
      !member.image.includes('default-avatar') &&
      !member.image.includes('placeholder.') &&
      !member.image.includes('robot') &&
      !(
        member.image.endsWith('/profile-image') ||
        member.image.includes('/profile-image?') ||
        member.image === 'https://via.placeholder.com/400'
      );

    // Don't show images for non-clickable categories
    const shouldShowImage = !isNonClickable && hasValidImage;

    const handleImageError = () => {
      setImageError(true);
      setImageLoading(false);
    };

    const handleImageLoad = () => {
      setImageLoading(false);
    };

    return (
      <div
        className={`bg-white rounded-lg border border-gray-300 overflow-hidden transition-all duration-300 ${
          !isNonClickable ? 'group cursor-pointer hover:shadow-lg' : 'cursor-default'
        }`}
        onClick={() => !isNonClickable && handleMemberClick(member)}
      >
        {/* Only show image section for clickable categories (Faculty + Alumni) */}
        {!isNonClickable && (
          <div className="relative aspect-square overflow-hidden bg-gray-50">
            {shouldShowImage && !imageError ? (
              <>
                {imageLoading && (
                  <div className="absolute inset-0 flex items-center justify-center bg-gray-100">
                    <div className="animate-spin rounded-full h-8 w-8 border-b-2 border-blue-600"></div>
                  </div>
                )}
                <img
                  src={member.image}
                  alt={member.name}
                  className={`w-full h-full object-cover transition-transform duration-300 group-hover:scale-105 ${
                    imageLoading ? 'opacity-0' : 'opacity-100'
                  }`}
                  onError={handleImageError}
                  onLoad={handleImageLoad}
                  loading="lazy"
                />
              </>
            ) : (
              <div
                className="w-full h-full flex items-center justify-center"
                style={{ backgroundColor: '#e0e5eb' }}
              >
                <svg className="w-32 h-32 text-gray-400" fill="currentColor" viewBox="0 0 24 24">
                  <path d="M12 12c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm0 2c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z" />
                </svg>
              </div>
            )}
          </div>
        )}

        <div className="p-4 sm:p-6">
          {/* Status badge for alumni */}
          {(isRetired || isResigned) && (
            <div className="mb-2">
              <span
                className="inline-block px-2 py-0.5 text-xs font-medium rounded-full text-white"
                style={{ backgroundColor: isResigned ? '#6b7280' : '#dc2626' }}
              >
                {isResigned ? 'Resigned' : 'Retired'}
              </span>
            </div>
          )}

          <h3
            className="text-lg font-medium mb-2 group-hover:opacity-70 transition-opacity"
            style={{ color: '#012068' }}
          >
            {member.name}
          </h3>
          <p className="text-sm leading-relaxed" style={{ color: '#e64838' }}>
            {member.position}
          </p>

          {!isNonClickable && (
            <>
              {member.department && (
                <p className="text-xs mt-1" style={{ color: '#666' }}>
                  {member.department}
                </p>
              )}
              {member.specialty && (
                <p className="text-xs mt-1 font-medium" style={{ color: '#333' }}>
                  {member.specialty}
                </p>
              )}
            </>
          )}
        </div>
      </div>
    );
  };

  return (
    <div className="min-h-screen">
      {/* Breadcrumb Section */}
      <section className="py-4" style={{ backgroundColor: '#f4f4f4' }}>
        <div className="max-w-7xl mx-auto px-4">
          <nav className="flex items-center space-x-2 text-sm">
            <Link
              href="/"
              className="hover:opacity-70 transition-opacity duration-200"
              style={{ color: '#012068' }}
            >
              Home
            </Link>
            <ChevronRight className="w-4 h-4" style={{ color: '#012068' }} />
            <span className="font-medium" style={{ color: '#e64838' }}>
              Faculty
            </span>
          </nav>

          <div className="mt-6">
            <div className="flex items-center mb-4">
              <h1 className="text-3xl font-bold" style={{ color: '#012068' }}>
                {title}
              </h1>
            </div>
            <p className="text-base max-w-3xl leading-relaxed" style={{ color: '#333' }}>
              Meet our dedicated team of medical professionals, researchers, and support staff
              committed to advancing healthcare, education, and patient outcomes at Christian
              Medical College, Vellore
            </p>
          </div>
        </div>
      </section>

      {/* Faculty Section */}
      {facultyMembers.length > 0 && (
        <section className="py-8" style={{ backgroundColor: '#fff' }}>
          <div className="max-w-7xl mx-auto px-4">
            <div className="mb-6">
              <h2 className="text-2xl font-bold mb-2" style={{ color: '#012068' }}>
                Faculty Members
              </h2>
              <p className="text-sm" style={{ color: '#666' }}>
                Our experienced faculty members leading medical education and research
              </p>
            </div>
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {facultyMembers.map((member) => (
                <TeamMemberCard key={member.id} member={member} />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* Faculty Alumni Section — RETIRED + RESIGNED */}
      {alumniStaff.length > 0 && (
        <section className="py-8" style={{ backgroundColor: '#f9f9f9' }}>
          <div className="max-w-7xl mx-auto px-4">
            <div className="mb-8">
              <h2 className="text-2xl font-bold mb-4" style={{ color: '#012068' }}>
                Faculty Alumni
              </h2>
              <p className="text-sm mb-2" style={{ color: '#666' }}>
                Honoring our retired and former faculty members for their dedicated service
              </p>
            </div>
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {alumniStaff.map((member) => (
                <TeamMemberCard key={member.id} member={member} />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* Support Team Section */}
      {supportTeam.length > 0 && (
        <section className="py-8" style={{ backgroundColor: '#fff' }}>
          <div className="max-w-7xl mx-auto px-4">
            <div className="mb-8">
              <h2 className="text-2xl font-bold mb-4" style={{ color: '#012068' }}>
                Support Team
              </h2>
              <p className="text-base leading-relaxed mb-2" style={{ color: '#012068' }}>
                <strong>Clinical Support Staff</strong> — Essential team members providing
                specialised support services
              </p>
              <p className="text-sm mb-1" style={{ color: '#012068' }}>
                <strong>Administrative &amp; Technical Support</strong> — Dedicated professionals
                ensuring smooth operations
              </p>
            </div>
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {supportTeam.map((member) => (
                <TeamMemberCard key={member.id} member={member} />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* Guides / Friends / Patrons Section */}
      {guidesFriendsPatrons.length > 0 && (
        <section className="py-8" style={{ backgroundColor: '#f9f9f9' }}>
          <div className="max-w-7xl mx-auto px-4">
            <div className="mb-8">
              <h2 className="text-2xl font-bold mb-4" style={{ color: '#012068' }}>
                Guides / Friends / Patrons
              </h2>
              <p className="text-base leading-relaxed mb-2" style={{ color: '#012068' }}>
                <strong>Guides</strong> — Mentors and senior professionals who have shaped our
                department
              </p>
              <p className="text-sm mb-1" style={{ color: '#012068' }}>
                <strong>Friends &amp; Patrons</strong> — Valued supporters and well-wishers of our
                institution
              </p>
            </div>
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {guidesFriendsPatrons.map((member) => (
                <TeamMemberCard key={member.id} member={member} />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* Trainees & Fellows Section */}
      {traineesAndFellows.length > 0 && (
        <section className="py-8" style={{ backgroundColor: '#fff' }}>
          <div className="max-w-7xl mx-auto px-4">
            <div className="mb-8">
              <h2 className="text-2xl font-bold mb-4" style={{ color: '#012068' }}>
                Trainees &amp; Fellows
              </h2>
              <p className="text-sm mb-2" style={{ color: '#666' }}>
                Medical trainees, residents, and fellows advancing their skills and contributing
                to patient care
              </p>
            </div>
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
              {traineesAndFellows.map((member) => (
                <TeamMemberCard key={member.id} member={member} />
              ))}
            </div>
          </div>
        </section>
      )}

      {/* No data message */}
      {teamMembers.length === 0 && !loading && (
        <section className="py-16 text-center">
          <div className="max-w-2xl mx-auto px-4">
            <h2 className="text-2xl font-bold mb-4" style={{ color: '#012068' }}>
              No Faculty Data Available
            </h2>
            <p className="text-gray-600 mb-6">
              Faculty information is currently being updated. Please check back later or contact
              administration.
            </p>
            <button
              onClick={() => window.location.reload()}
              className="px-6 py-3 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors"
            >
              Refresh Page
            </button>
          </div>
        </section>
      )}
    </div>
  );
};

export default TeamListing;