'use client';

import { useState, useEffect } from 'react';
import Image from 'next/image';
import { useParams } from 'next/navigation';
import { useSession } from 'next-auth/react';

// Import shared components
import {
  InfoCard,
  ExperienceSection,
  ProfileCard,
  SpecializationSection,
  TestimonialsSection,
  StatusButtons,
  ContactInfo,
} from '@/components/profile';
import { ConnectRequestModal } from '@/components/modals';
import { agentsService, AgentProfile, FieldValueResponse } from '@/services/agents.service';
import { connectionRequestsService, ConnectionStatus } from '@/services/connection-requests.service';
import { uploadService } from '@/services/upload.service';
import { mapFieldValuesToExperience, mapFieldValuesToSpecializationFields, mapFieldValuesToProfileCard, mapFieldValuesToContactInfo, mapFieldValuesToAvailability, ExperienceData, SpecializationFieldsData, ProfileCardData, ContactInfoData, AvailabilityData } from '@/utils/profileDataMapper';

// Mock data for sections not yet available from API
const mockData = {
  preferredWorkEnvironment: 'Preferred work environment includes on-site property visits, in-depth market research, client consultations, property tours, and active involvement in negotiations to ensure the best outcomes',
  testimonialHighlight: "The most amazing experience I've had as a real estate professional is helping a family secure their dream home and seeing their happiness when they received the keys.",
  testimonials: [
    {
      id: 1,
      text: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean commodo ligula eget dolor. Sed dignissim, nisl eget tincidunt vulputate, lacus justo bibendum ipsum, vitae tempus risus lorem at nunc. Integer sed arcu vitae risus feugiat vehicula. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.',
      author: 'Kenedy Kenney',
      role: 'Chief Operations Officer',
      rating: 5,
    },
    {
      id: 2,
      text: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean commodo ligula eget dolor. Sed dignissim, nisl eget tincidunt vulputate, lacus justo bibendum ipsum, vitae tempus risus lorem at nunc. Integer sed arcu vitae risus feugiat vehicula. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.',
      author: 'Kenedy Kenney',
      role: 'Chief Operations Officer',
      rating: 5,
    },
    {
      id: 3,
      text: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Aenean commodo ligula eget dolor. Sed dignissim, nisl eget tincidunt vulputate, lacus justo bibendum ipsum, vitae tempus risus lorem at nunc. Integer sed arcu vitae risus feugiat vehicula. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas.',
      author: 'Kenedy Kenney',
      role: 'Chief Operations Officer',
      rating: 5,
    },
  ],
};

// Default experience data when no field values are available
const defaultExperience: ExperienceData = {
  years: '-',
  contracts: '-',
  licensingAreas: [],
  expertiseYears: [],
  certifications: [],
};

// Default specialization fields data when no field values are available
const defaultSpecializationFieldsData: SpecializationFieldsData = {
  fields: [],
};

// Default profile card data when no field values are available
const defaultProfileCardData: ProfileCardData = {
  bio: '',
  expertise: [],
  serviceAreas: [],
  city: null,
  state: null,
};

// Default contact info data when no field values are available
const defaultContactInfoData: ContactInfoData = {
  email: null,
  phone: null,
};

// Default availability data when no field values are available
const defaultAvailabilityData: AvailabilityData = {
  type: '',
  schedule: [],
};

export default function AgentProfileView() {
  const params = useParams();
  const id = params.id as string;
  const { data: session } = useSession();

  const [agentProfile, setAgentProfile] = useState<AgentProfile | null>(null);
  const [fieldValues, setFieldValues] = useState<FieldValueResponse[]>([]);
  const [experienceData, setExperienceData] = useState<ExperienceData>(defaultExperience);
  const [specializationFieldsData, setSpecializationFieldsData] = useState<SpecializationFieldsData>(defaultSpecializationFieldsData);
  const [profileCardData, setProfileCardData] = useState<ProfileCardData>(defaultProfileCardData);
  const [contactInfoData, setContactInfoData] = useState<ContactInfoData>(defaultContactInfoData);
  const [availabilityData, setAvailabilityData] = useState<AvailabilityData>(defaultAvailabilityData);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [imageError, setImageError] = useState(false);
  const [avatarUrl, setAvatarUrl] = useState<string | null>(null);

  // Connect modal state
  const [showConnectModal, setShowConnectModal] = useState(false);
  const [connectionStatus, setConnectionStatus] = useState<ConnectionStatus | null>(null);
  const [connectionRequestId, setConnectionRequestId] = useState<string | null>(null);

  const defaultImage = '/assets/demo_images/8f017153a7b4a239a4f0691234ef97dd55092282.jpg';

  // Helper to check if avatar is an S3 key (not a full URL or local path)
  const isS3Key = (avatar: string | null | undefined): boolean => {
    if (!avatar) return false;
    // S3 keys don't start with http or /
    return !avatar.startsWith('http') && !avatar.startsWith('/');
  };

  // Fetch agent profile and field values on mount
  useEffect(() => {
    const fetchData = async () => {
      if (!id) return;

      try {
        setLoading(true);
        setError(null);

        // Fetch profile and field values in parallel
        const [profile, fieldValuesResponse] = await Promise.all([
          agentsService.getAgentById(id),
          agentsService.getFieldValuesByAgentId(id),
        ]);

        setAgentProfile(profile);
        setFieldValues(fieldValuesResponse.fieldValues);

        // Map field values to experience data structure
        const mappedExperience = mapFieldValuesToExperience(fieldValuesResponse.fieldValues);
        setExperienceData(mappedExperience);

        // Map field values to specialization fields data (only fields from "Specialization" section)
        const mappedSpecializationFields = mapFieldValuesToSpecializationFields(fieldValuesResponse.fieldValues);
        setSpecializationFieldsData(mappedSpecializationFields);

        // Map field values to profile card data (bio, expertise, location)
        const mappedProfileCard = mapFieldValuesToProfileCard(fieldValuesResponse.fieldValues);
        setProfileCardData(mappedProfileCard);

        // Map field values to contact info data (email, phone)
        const mappedContactInfo = mapFieldValuesToContactInfo(fieldValuesResponse.fieldValues);
        setContactInfoData(mappedContactInfo);

        // Map field values to availability data
        const mappedAvailability = mapFieldValuesToAvailability(fieldValuesResponse.fieldValues);
        setAvailabilityData(mappedAvailability);

        // If avatar is an S3 key, fetch presigned URL
        if (profile.avatar && isS3Key(profile.avatar)) {
          try {
            const presignedUrl = await uploadService.getPresignedDownloadUrl(profile.avatar);
            // Add cache-busting parameter to force browser to fetch fresh image
            // This prevents showing old cached image when avatar is updated
            const profileWithTimestamp = profile as unknown as { updatedAt?: string };
            const cacheBuster = profileWithTimestamp.updatedAt
              ? new Date(profileWithTimestamp.updatedAt).getTime()
              : Date.now();
            const urlWithCacheBuster = `${presignedUrl}&_t=${cacheBuster}`;
            setAvatarUrl(urlWithCacheBuster);
          } catch (avatarErr) {
            console.error('Failed to get avatar URL:', avatarErr);
            // Don't fail the whole page, just use default image
          }
        } else if (profile.avatar) {
          // It's already a full URL or local path
          setAvatarUrl(profile.avatar);
        }
      } catch (err) {
        console.error('Failed to fetch profile:', err);
        setError('Failed to load profile data');
      } finally {
        setLoading(false);
      }
    };

    fetchData();
  }, [id]);

  // Fetch connection status when user is logged in
  useEffect(() => {
    const fetchConnectionStatus = async () => {
      if (!id || !session) return;

      try {
        const statusResponse = await connectionRequestsService.getConnectionStatus(id);
        setConnectionStatus(statusResponse?.status || null);
        setConnectionRequestId(statusResponse?.id || null);
      } catch (err) {
        console.error('Failed to fetch connection status:', err);
        // Non-critical error, don't show to user
      }
    };

    fetchConnectionStatus();
  }, [id, session]);

  // Handle connection request success
  const handleConnectionSuccess = () => {
    setConnectionStatus('PENDING');
  };

  // Handle unlink/disconnect
  const handleUnlink = async () => {
    if (!connectionRequestId) return;

    try {
      await connectionRequestsService.cancelRequest(connectionRequestId);
      setConnectionStatus(null);
      setConnectionRequestId(null);
    } catch (err) {
      console.error('Failed to unlink connection:', err);
    }
  };

  const getProfileImageUrl = () => {
    // If image failed to load, return default
    if (imageError) {
      return defaultImage;
    }

    // If we have a presigned URL from S3, use it
    if (avatarUrl) {
      return avatarUrl;
    }

    // Check for null, undefined, or empty string
    if (!agentProfile?.avatar || agentProfile.avatar.trim() === '') {
      return defaultImage;
    }

    // For relative paths (local assets), return as-is
    if (agentProfile.avatar.startsWith('/')) {
      return agentProfile.avatar;
    }

    // Default fallback
    return defaultImage;
  };

  // Format member since date
  const formatMemberSince = (dateString?: string) => {
    if (!dateString) return 'Member';
    try {
      const date = new Date(dateString);
      return date.toLocaleDateString('en-US', { month: 'long', year: 'numeric' });
    } catch {
      return 'Member';
    }
  };

  if (loading) {
    return (
      <div className="max-w-7xl mx-auto px-4 lg:px-8 py-6">
        <div className="flex items-center justify-center h-[calc(100vh-180px)]">
          <div className="flex flex-col items-center gap-4">
            <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-[#E58625]"></div>
            <p className="text-[14px] font-serif text-[#00293D]/70">Loading profile...</p>
          </div>
        </div>
      </div>
    );
  }

  if (error || !agentProfile) {
    return (
      <div className="max-w-7xl mx-auto px-4 lg:px-8 py-6">
        <div className="flex items-center justify-center h-[calc(100vh-180px)]">
          <div className="bg-white rounded-[20px] p-8 shadow-[0px_10px_20px_rgba(217,217,217,0.5)] max-w-md text-center">
            <div className="w-16 h-16 bg-red-100 rounded-full flex items-center justify-center mx-auto mb-4">
              <svg className="w-8 h-8 text-red-500" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
              </svg>
            </div>
            <h2 className="text-[18px] font-bold font-serif text-[#00293D] mb-2">Unable to Load Profile</h2>
            <p className="text-[14px] font-serif text-[#00293D]/70 mb-4">{error || 'Profile not found'}</p>
            <button
              onClick={() => window.location.reload()}
              className="px-6 py-2 bg-[#E58625] rounded-full text-[14px] font-semibold font-serif text-white hover:bg-[#E58625]/90 transition-colors"
            >
              Try Again
            </button>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="max-w-7xl mx-auto px-4 lg:px-8 py-6 space-y-6">
      {/* Main Layout - Responsive: Column on mobile, Row on desktop */}
      <div className="flex flex-col lg:flex-row gap-6 lg:items-stretch">
        {/* Left Sidebar - Status & Contact */}
        <div className="w-full lg:w-[280px] flex-shrink-0 space-y-4 flex flex-col items-center lg:items-start">
          {/* Profile Image */}
          <div className="relative w-[200px] lg:w-[260px]">
            <div className="w-[200px] h-[200px] lg:w-[260px] lg:h-[260px] rounded-[15px] overflow-hidden">
              {/* eslint-disable-next-line @next/next/no-img-element */}
              <img
                src={getProfileImageUrl()}
                alt="Profile"
                className="w-full h-full object-cover"
                onError={(e) => {
                  const target = e.target as HTMLImageElement;
                  target.src = defaultImage;
                  setImageError(true);
                }}
              />
              {/* Gradient Overlay */}
              <div className="absolute inset-0 bg-gradient-to-t from-black/50 via-black/20 to-transparent pointer-events-none" />
            </div>
          </div>

          {/* Status Buttons - Public view shows availability status with Connect/Pending/Unlink button */}
          <StatusButtons
            isAvailable={agentProfile.isAvailable ?? true}
            connectionStatus={connectionStatus}
            onConnectClick={() => setShowConnectModal(true)}
            onUnlinkClick={handleUnlink}
          />

          {/* Contact Info */}
          <ContactInfo
            email={agentProfile.email || agentProfile.user?.email || contactInfoData.email || ''}
            phone={agentProfile.phone || contactInfoData.phone || ''}
          />
        </div>

        {/* Right Content - Profile Info + Experience + All Sections */}
        <div className="flex-1 space-y-4">
          {/* Profile Card - No edit button for user view */}
          <ProfileCard
            firstName={agentProfile.firstName}
            lastName={agentProfile.lastName}
            isVerified={agentProfile.isVerified}
            title={agentProfile.agentType?.name || 'Real Estate Agent'}
            location={profileCardData.city && profileCardData.state
              ? `${profileCardData.city}, ${profileCardData.state}`
              : profileCardData.city || profileCardData.state || agentProfile.serviceAreas?.[0] || '-'}
            memberSince={formatMemberSince((agentProfile as unknown as { createdAt?: string }).createdAt)}
            bio={profileCardData.bio || agentProfile.bio || ''}
            expertise={profileCardData.expertise.length > 0 ? profileCardData.expertise : (agentProfile.specializations || [])}
            showEditButton={false}
            messageHref="/user/message"
            connectionStatus={connectionStatus}
            onConnectClick={() => setShowConnectModal(true)}
            onUnlinkClick={handleUnlink}
          />

          {/* Experience Section - Dynamic data from profile fields */}
          <ExperienceSection experience={experienceData} />

          {/* Info Cards Section */}
          <div className="flex flex-col lg:grid lg:grid-cols-3 gap-6">
            <InfoCard
              title="Availability"
              icon={
                <Image
                  src="/assets/icons/availability-clock-icon.svg"
                  alt="Availability"
                  width={28}
                  height={31}
                />
              }
              content={
                <div>
                  {availabilityData.type && (
                    <p className="font-semibold font-serif text-[14px] leading-[19px] text-[#00293D] mb-2">{availabilityData.type}</p>
                  )}
                  <div className="space-y-1">
                    {availabilityData.schedule.length > 0 ? (
                      availabilityData.schedule.map((item, index) => (
                        <p key={index} className="font-normal font-serif text-[14px] leading-[19px] text-[#00293D]">{item}</p>
                      ))
                    ) : (
                      <p className="font-normal font-serif text-[14px] leading-[19px] text-[#00293D]/60">Not specified</p>
                    )}
                  </div>
                </div>
              }
            />
            <InfoCard
              title=""
              icon={
                <Image
                  src="/assets/icons/work-environment-icon.svg"
                  alt="Work environment"
                  width={28}
                  height={28}
                />
              }
              content={<p className="font-serif font-semibold text-[14px] leading-[19px] text-[#00293D]">{mockData.preferredWorkEnvironment}</p>}
            />
            <InfoCard
              title=""
              icon={
                <Image
                  src="/assets/icons/testimonial-star-icon.svg"
                  alt="Testimonial"
                  width={28}
                  height={28}
                />
              }
              content={<p className="text-[14px] font-semibold font-serif leading-[19px] text-center text-[#00293D]">&ldquo;{mockData.testimonialHighlight}&rdquo;</p>}
            />
          </div>

          {/* Specialization Section */}
          <SpecializationSection fieldsData={specializationFieldsData} />

          {/* Testimonials Section */}
          <TestimonialsSection testimonials={mockData.testimonials} />
        </div>
      </div>

      {/* Connect Request Modal */}
      <ConnectRequestModal
        isOpen={showConnectModal}
        onClose={() => setShowConnectModal(false)}
        agentProfileId={id}
        agentName={`${agentProfile.firstName || ''} ${agentProfile.lastName || ''}`.trim() || 'Agent'}
        existingStatus={connectionStatus}
        onSuccess={handleConnectionSuccess}
      />
    </div>
  );
}