import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:go_router/go_router.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:real_estate_mobile/core/constants/api_constants.dart';
import 'package:real_estate_mobile/core/constants/app_colors.dart';
import 'package:real_estate_mobile/core/network/api_client.dart';

class ContactScreen extends StatefulWidget {
  const ContactScreen({super.key});

  @override
  State<ContactScreen> createState() => _ContactScreenState();
}

class _ContactScreenState extends State<ContactScreen> {
  final _nameController = TextEditingController();
  final _emailController = TextEditingController();
  final _phoneController = TextEditingController();
  final _messageController = TextEditingController();
  bool _isSending = false;

  // CMS data with defaults
  String _contactEmail = '123support@gmail.com';
  String _contactPhone = '1234567890';
  String _contactPhoneHours = 'Mon-Fri 9am-6pm';
  String _contactOfficeAddress = '123 Market Street';
  String _contactOfficeCity = 'New York CA 234737';
  String _pageTitle = 'Get In Touch';
  String _pageDescription = 'Have a question about a property or need assistance? Fill out the form below and our team will get back to you shortly.';
  String _directionsUrl = 'https://maps.google.com/?q=123+Market+Street+New+York+CA+234737';

  @override
  void initState() {
    super.initState();
    _loadContactCms();
  }

  Future<void> _loadContactCms() async {
    try {
      final dio = ApiClient.instance.dio;
      final response = await dio.get(ApiConstants.cmsPageContact);
      final data = response.data['data'] as List<dynamic>?;
      if (data == null) return;

      for (final section in data) {
        final sectionKey = section['sectionKey'] as String?;
        final content = section['content'] as Map<String, dynamic>?;
        if (sectionKey == 'contactDetails' && content != null) {
          setState(() {
            _contactEmail = content['email'] as String? ?? _contactEmail;
            _contactPhone = content['phone'] as String? ?? _contactPhone;
            _contactPhoneHours = content['phoneHours'] as String? ?? _contactPhoneHours;
            _contactOfficeAddress = content['officeAddress'] as String? ?? _contactOfficeAddress;
            _contactOfficeCity = content['officeCity'] as String? ?? _contactOfficeCity;
            _pageTitle = content['title'] as String? ?? _pageTitle;
            _pageDescription = content['description'] as String? ?? _pageDescription;
            _directionsUrl = content['directionsUrl'] as String? ?? _directionsUrl;
          });
        }
      }
    } catch (_) {
      // Use defaults on error
    }
  }

  @override
  void dispose() {
    _nameController.dispose();
    _emailController.dispose();
    _phoneController.dispose();
    _messageController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ListView(
      padding: EdgeInsets.zero,
      children: [
        // Back button
        Padding(
          padding: const EdgeInsets.fromLTRB(16, 8, 16, 0),
          child: Align(
            alignment: Alignment.centerLeft,
            child: GestureDetector(
              onTap: () {
                if (Navigator.of(context).canPop()) {
                  Navigator.of(context).pop();
                } else {
                  context.go('/home');
                }
              },
              child: Container(
                width: 36,
                height: 36,
                decoration: BoxDecoration(
                  color: AppColors.primaryDark.withValues(alpha: 0.08),
                  shape: BoxShape.circle,
                ),
                child: const Icon(
                  Icons.arrow_back_ios_new_rounded,
                  color: AppColors.primaryDark,
                  size: 18,
                ),
              ),
            ),
          ),
        ),
        const SizedBox(height: 10),
        _buildTitle(),
        const SizedBox(height: 10),
        _buildDescription(),
        const SizedBox(height: 40),
        _buildContactForm(),
        const SizedBox(height: 20),
        _buildContactDetails(),
        const SizedBox(height: 40),
        _buildFindAgentSection(),
        const SizedBox(height: 30),
      ],
    );
  }

  // -- Title --
  Widget _buildTitle() {
    return Center(
      child: Text(
        _pageTitle,
        style: const TextStyle(
          fontFamily: 'Fractul',
          fontSize: 25,
          fontWeight: FontWeight.w700,
          color: AppColors.primaryDark,
        ),
      ),
    );
  }

  // -- Description --
  Widget _buildDescription() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 20),
      child: Text(
        _pageDescription,
        textAlign: TextAlign.center,
        style: const TextStyle(
          fontFamily: 'SourceSerif4',
          fontSize: 14,
          fontWeight: FontWeight.w400,
          color: AppColors.primaryDark,
        ),
      ),
    );
  }

  // -- Contact Form --
  Widget _buildContactForm() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 23),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          _buildLabel('Your Name'),
          const SizedBox(height: 8),
          _buildTextField(
            controller: _nameController,
            hintText: 'Brain Neeland',
          ),
          const SizedBox(height: 24),
          _buildLabel('Email Address'),
          const SizedBox(height: 8),
          _buildTextField(
            controller: _emailController,
            hintText: '123@gmail.com',
            keyboardType: TextInputType.emailAddress,
            svgIcon: 'assets/icons/email_orange_icon.svg',
          ),
          const SizedBox(height: 24),
          _buildLabel('Phone Number'),
          const SizedBox(height: 8),
          _buildTextField(
            controller: _phoneController,
            hintText: '12345678990',
            keyboardType: TextInputType.phone,
            svgIcon: 'assets/icons/phone_orange_icon.svg',
          ),
          const SizedBox(height: 24),
          _buildLabel('Message'),
          const SizedBox(height: 8),
          _buildMessageField(),
          const SizedBox(height: 30),
          _buildFormButtons(),
        ],
      ),
    );
  }

  Widget _buildLabel(String text) {
    return Text(
      text,
      style: const TextStyle(
        fontFamily: 'Fractul',
        fontSize: 14,
        fontWeight: FontWeight.w500,
        color: AppColors.primaryDark,
      ),
    );
  }

  Widget _buildTextField({
    required TextEditingController controller,
    required String hintText,
    TextInputType? keyboardType,
    String? svgIcon,
  }) {
    final borderSide = BorderSide(
      color: AppColors.primaryDark.withValues(alpha: 0.1),
      width: 1,
    );
    final border = OutlineInputBorder(
      borderRadius: BorderRadius.circular(15),
      borderSide: borderSide,
    );

    return SizedBox(
      height: 52,
      child: TextField(
        controller: controller,
        keyboardType: keyboardType,
        style: const TextStyle(
          fontFamily: 'Fractul',
          fontSize: 14,
          fontWeight: FontWeight.w200,
          color: Colors.black,
        ),
        decoration: InputDecoration(
          contentPadding: const EdgeInsets.symmetric(
            horizontal: 20,
            vertical: 14,
          ),
          hintText: hintText,
          hintStyle: TextStyle(
            fontFamily: 'Fractul',
            fontSize: 14,
            fontWeight: FontWeight.w200,
            color: Colors.black.withValues(alpha: 0.4),
          ),
          border: border,
          enabledBorder: border,
          focusedBorder: border,
          disabledBorder: border,
          prefixIcon: svgIcon != null
              ? Padding(
                  padding: const EdgeInsets.all(14),
                  child: SvgPicture.asset(
                    svgIcon,
                    width: 22,
                    height: 22,
                  ),
                )
              : null,
          prefixIconConstraints: svgIcon != null
              ? const BoxConstraints(minWidth: 48)
              : null,
        ),
      ),
    );
  }

  Widget _buildMessageField() {
    final borderSide = BorderSide(
      color: AppColors.primaryDark.withValues(alpha: 0.1),
      width: 1,
    );
    final border = OutlineInputBorder(
      borderRadius: BorderRadius.circular(15),
      borderSide: borderSide,
    );

    return SizedBox(
      height: 183,
      child: TextField(
        controller: _messageController,
        maxLines: null,
        expands: true,
        textAlignVertical: TextAlignVertical.top,
        style: const TextStyle(
          fontFamily: 'Fractul',
          fontSize: 14,
          fontWeight: FontWeight.w200,
          color: Colors.black,
        ),
        decoration: InputDecoration(
          contentPadding: const EdgeInsets.symmetric(
            horizontal: 20,
            vertical: 16,
          ),
          hintText: 'Write your message here...',
          hintStyle: TextStyle(
            fontFamily: 'Fractul',
            fontSize: 14,
            fontWeight: FontWeight.w200,
            color: Colors.black.withValues(alpha: 0.4),
          ),
          border: border,
          enabledBorder: border,
          focusedBorder: border,
          disabledBorder: border,
        ),
      ),
    );
  }

  Widget _buildFormButtons() {
    return Row(
      children: [
        Expanded(
          child: GestureDetector(
            onTap: () {
              _nameController.clear();
              _emailController.clear();
              _phoneController.clear();
              _messageController.clear();
            },
            child: Container(
              height: 46,
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(15),
                border: Border.all(
                  color: AppColors.primaryDark.withValues(alpha: 0.1),
                  width: 1,
                ),
              ),
              alignment: Alignment.center,
              child: const Text(
                'Cancel',
                style: TextStyle(
                  fontFamily: 'Fractul',
                  fontSize: 14,
                  fontWeight: FontWeight.w700,
                  color: AppColors.primaryDark,
                ),
              ),
            ),
          ),
        ),
        const SizedBox(width: 23),
        Expanded(
          child: GestureDetector(
            onTap: _isSending ? null : _sendMessage,
            child: Container(
              height: 46,
              decoration: BoxDecoration(
                color: AppColors.accentOrange,
                borderRadius: BorderRadius.circular(15),
              ),
              alignment: Alignment.center,
              child: _isSending
                  ? const SizedBox(
                      width: 20,
                      height: 20,
                      child: CircularProgressIndicator(
                        strokeWidth: 2,
                        color: AppColors.primaryDark,
                      ),
                    )
                  : const Text(
                      'Send Message',
                      style: TextStyle(
                        fontFamily: 'Fractul',
                        fontSize: 14,
                        fontWeight: FontWeight.w700,
                        color: AppColors.primaryDark,
                      ),
                    ),
            ),
          ),
        ),
      ],
    );
  }

  // -- Contact Details Section --
  Widget _buildContactDetails() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 25),
      child: Container(
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(20),
          border: Border.all(
            color: AppColors.primaryDark.withValues(alpha: 0.1),
            width: 1,
          ),
        ),
        child: Column(
          children: [
            const SizedBox(height: 17),
            // Title
            const Text(
              'Contact Details',
              style: TextStyle(
                fontFamily: 'Fractul',
                fontSize: 14,
                fontWeight: FontWeight.w500,
                color: AppColors.primaryDark,
              ),
            ),
            const SizedBox(height: 12),
            _buildDetailDivider(),
            // Email Support
            _buildContactDetailRow(
              svgIcon: 'assets/icons/email_orange_icon.svg',
              label: 'Email Support',
              value: _contactEmail,
            ),
            _buildDetailDivider(),
            // Phone
            _buildContactDetailRow(
              svgIcon: 'assets/icons/phone_orange_icon.svg',
              label: 'Phone',
              value: _contactPhone,
              subtitle: _contactPhoneHours,
            ),
            _buildDetailDivider(),
            // Office
            _buildContactDetailRow(
              svgIcon: 'assets/icons/location_orange_icon.svg',
              label: 'Office',
              value: '$_contactOfficeAddress\n$_contactOfficeCity',
            ),
            const SizedBox(height: 16),
            // Map image
            Padding(
              padding: const EdgeInsets.symmetric(horizontal: 36),
              child: ClipRRect(
                borderRadius: BorderRadius.circular(20),
                child: Image.asset(
                  'assets/images/contact_map.jpg',
                  height: 166,
                  width: double.infinity,
                  fit: BoxFit.cover,
                ),
              ),
            ),
            const SizedBox(height: 16),
            // Get Directions button
            GestureDetector(
              onTap: () async {
                final uri = Uri.parse(_directionsUrl);
                if (await canLaunchUrl(uri)) {
                  await launchUrl(uri, mode: LaunchMode.externalApplication);
                }
              },
              child: Container(
                width: 139,
                height: 35,
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(15),
                  border: Border.all(
                    color: AppColors.accentOrange,
                    width: 1,
                  ),
                ),
                alignment: Alignment.center,
                child: const Text(
                  'Get Directions',
                  style: TextStyle(
                    fontFamily: 'SourceSerif4',
                    fontSize: 14,
                    fontWeight: FontWeight.w400,
                    color: AppColors.accentOrange,
                  ),
                ),
              ),
            ),
            const SizedBox(height: 20),
          ],
        ),
      ),
    );
  }

  Widget _buildDetailDivider() {
    return Divider(
      color: AppColors.primaryDark.withValues(alpha: 0.1),
      height: 1,
      thickness: 1,
      indent: 1,
      endIndent: 1,
    );
  }

  Widget _buildContactDetailRow({
    required String svgIcon,
    required String label,
    required String value,
    String? subtitle,
  }) {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 16),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SvgPicture.asset(
            svgIcon,
            width: 20,
            height: 20,
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  label,
                  style: const TextStyle(
                    fontFamily: 'SourceSerif4',
                    fontSize: 14,
                    fontWeight: FontWeight.w300,
                    color: AppColors.primaryDark,
                  ),
                ),
                const SizedBox(height: 4),
                Text(
                  value,
                  style: const TextStyle(
                    fontFamily: 'SourceSerif4',
                    fontSize: 14,
                    fontWeight: FontWeight.w400,
                    color: AppColors.primaryDark,
                  ),
                ),
                if (subtitle != null) ...[
                  const SizedBox(height: 4),
                  Text(
                    subtitle,
                    style: const TextStyle(
                      fontFamily: 'SourceSerif4',
                      fontSize: 10,
                      fontWeight: FontWeight.w400,
                      color: AppColors.primaryDark,
                    ),
                  ),
                ],
              ],
            ),
          ),
        ],
      ),
    );
  }

  // -- Find Agent Section --
  Widget _buildFindAgentSection() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 30),
      child: Column(
        children: [
          const Text(
            'Ready to find an agent?',
            textAlign: TextAlign.center,
            style: TextStyle(
              fontFamily: 'Fractul',
              fontSize: 25,
              fontWeight: FontWeight.w700,
              color: AppColors.primaryDark,
            ),
          ),
          const SizedBox(height: 16),
          const Text(
            'Discover trusted agents and start your property journey with confidence.',
            textAlign: TextAlign.center,
            style: TextStyle(
              fontFamily: 'SourceSerif4',
              fontSize: 14,
              fontWeight: FontWeight.w400,
              color: AppColors.primaryDark,
            ),
          ),
          const SizedBox(height: 24),
          // Agent illustration
          ClipOval(
            child: Image.asset(
              'assets/images/agent_illustration.png',
              width: 254,
              height: 254,
              fit: BoxFit.cover,
            ),
          ),
          const SizedBox(height: 24),
          // Start Your Search button
          GestureDetector(
            onTap: () => context.push('/agents/search'),
            child: Container(
              height: 46,
              width: 220,
              decoration: BoxDecoration(
                color: AppColors.accentOrange,
                borderRadius: BorderRadius.circular(15),
              ),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  const Text(
                    'Start Your Search',
                    style: TextStyle(
                      fontFamily: 'Fractul',
                      fontSize: 16,
                      fontWeight: FontWeight.w700,
                      color: AppColors.primaryDark,
                    ),
                  ),
                  const SizedBox(width: 8),
                  const Icon(
                    Icons.arrow_forward_rounded,
                    size: 16,
                    color: AppColors.primaryDark,
                  ),
                ],
              ),
            ),
          ),
        ],
      ),
    );
  }

  // -- Send Message --
  Future<void> _sendMessage() async {
    final name = _nameController.text.trim();
    final email = _emailController.text.trim();
    final phone = _phoneController.text.trim();
    final message = _messageController.text.trim();

    if (name.isEmpty || email.isEmpty || message.isEmpty) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Please fill in all required fields'),
          backgroundColor: Colors.red,
        ),
      );
      return;
    }

    setState(() => _isSending = true);

    try {
      final dio = ApiClient.instance.dio;
      await dio.post('/contact', data: {
        'name': name,
        'email': email,
        if (phone.isNotEmpty) 'phone': phone,
        'message': message,
      });

      if (!mounted) return;
      setState(() => _isSending = false);
      _nameController.clear();
      _emailController.clear();
      _phoneController.clear();
      _messageController.clear();
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Message sent successfully!'),
          backgroundColor: Color(0xFF638559),
        ),
      );
    } catch (e) {
      if (!mounted) return;
      setState(() => _isSending = false);
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Failed to send message. Please try again.'),
          backgroundColor: Colors.red,
        ),
      );
    }
  }

}