import 'dart:io';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:flutter_rating_bar/flutter_rating_bar.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:image_picker/image_picker.dart';
import 'package:proxibuy/core/config/app_colors.dart';
import 'package:proxibuy/core/gen/assets.gen.dart';
import 'package:proxibuy/presentation/comment/bloc/comment_bloc.dart';
import 'package:proxibuy/presentation/comment/bloc/comment_event.dart';
import 'package:proxibuy/presentation/comment/bloc/comment_state.dart';
import 'package:proxibuy/presentation/pages/offers_page.dart';
import 'package:flutter_animate/flutter_animate.dart';

class CommentPage extends StatefulWidget {
  final String discountId;

  const CommentPage({super.key, required this.discountId});

  @override
  State<CommentPage> createState() => _CommentPageState();
}

class _CommentPageState extends State<CommentPage> {
  final _commentController = TextEditingController();
  double _rating = 0.0;
  final List<File> _images = [];
  final ImagePicker _picker = ImagePicker();

  @override
  void dispose() {
    _commentController.dispose();
    super.dispose();
  }

  void _pickImage(ImageSource source) async {
    if (_images.length >= 2) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('شما فقط می‌توانید ۲ عکس اضافه کنید.')),
      );
      return;
    }
    final pickedFile = await _picker.pickImage(
      source: source,
      imageQuality: 80,
    );
    if (pickedFile != null) {
      setState(() {
        _images.add(File(pickedFile.path));
      });
    }
  }

  void _removeImage(int index) {
    setState(() {
      _images.removeAt(index);
    });
  }

  void _showImageSourceActionSheet() {
    showModalBottomSheet(
      context: context,
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.vertical(top: Radius.circular(20.0)),
      ),
      builder: (context) {
        return SafeArea(
          child: Wrap(
            children: <Widget>[
              ListTile(
                leading: const Icon(
                  Icons.photo_library,
                  color: AppColors.primary,
                ),
                title: const Text('انتخاب از گالری'),
                onTap: () {
                  Navigator.of(context).pop();
                  _pickImage(ImageSource.gallery);
                },
              ),
              ListTile(
                leading: const Icon(Icons.camera_alt, color: AppColors.primary),
                title: const Text('گرفتن عکس با دوربین'),
                onTap: () {
                  Navigator.of(context).pop();
                  _pickImage(ImageSource.camera);
                },
              ),
            ],
          ),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return BlocProvider(
      create: (context) => CommentBloc(),
      child: Scaffold(
        backgroundColor: Colors.grey[50],
        appBar: _buildCustomAppBar(),
        body: SingleChildScrollView(
          padding: const EdgeInsets.all(24.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
                  _buildHeader(),
                  const SizedBox(height: 24),
                  Center(child: _buildRatingCard()),
                  const SizedBox(height: 16),
                  _buildCommentCard(),
                  const SizedBox(height: 16),
                  _buildImagePickerSection(),
                  const SizedBox(height: 32),
                  _buildActionButtons(),
                ]
                .animate(interval: 100.ms)
                .fadeIn(duration: 400.ms)
                .slideY(begin: 0.2, curve: Curves.easeOut),
          ),
        ),
      ),
    );
  }

  PreferredSizeWidget _buildCustomAppBar() {
    return PreferredSize(
      preferredSize: const Size.fromHeight(70.0),
      child: Container(
        decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: const BorderRadius.vertical(
            bottom: Radius.circular(15),
          ),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withOpacity(0.08),
              blurRadius: 10,
              offset: const Offset(0, 4),
            ),
          ],
        ),
        child: SafeArea(
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16.0),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.end,
              children: [
                const Text(
                  'ثبت نظر',
                  style: TextStyle(
                    color: Colors.black,
                    fontWeight: FontWeight.normal,
                    fontSize: 18,
                  ),
                ),
                IconButton(
                  icon: SvgPicture.asset(Assets.icons.arrowLeft.path),
                  onPressed: () => Navigator.of(context).pop(),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

  Widget _buildHeader() {
    return Center(
      child: Column(
        children: [
          Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              shape: BoxShape.circle,
              color: AppColors.confirm.withOpacity(0.1),
            ),
            child: Icon(
              Icons.check_circle_outline,
              color: AppColors.confirm,
              size: 50,
            ),
          ),
          const SizedBox(height: 16),
          const Text(
            'خریدت با موفقیت انجام شد. منتظر دیدار دوباره‌ات هستیم. لطفا نظرت رو در مورد این تخفیف بهمون بگو.',
            style: TextStyle(fontSize: 16, color: Colors.black, height: 1.5),
            textAlign: TextAlign.center,
          ),
        ],
      ),
    );
  }

  Widget _buildRatingCard() {
    return Card(
      elevation: 1,
      shadowColor: Colors.black12,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
      child: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          children: [
            const Text(
              "امتیاز شما چقدره؟",
              style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
            ),
            const SizedBox(height: 16),
            RatingBar.builder(
              initialRating: 0,
              minRating: 1,
              direction: Axis.horizontal,
              itemCount: 5,
              itemPadding: const EdgeInsets.symmetric(horizontal: 7.0),
              itemBuilder:
                  (context, _) =>
                      Icon(Icons.star, color: Colors.amber.shade700),
              onRatingUpdate: (rating) => setState(() => _rating = rating),
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildCommentCard() {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: TextField(
        controller: _commentController,
        maxLines: 4,
        textAlign: TextAlign.right,
        decoration: InputDecoration(
          labelText: "گوشمون به شماست",
          hintText: "نظراتت رو بگو...",
          alignLabelWithHint: true,
          suffixIcon: Padding(padding: const EdgeInsets.all(12.0)),
        ),
      ),
    );
  }

  Widget _buildImagePickerSection() {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        const Text(
          "افزودن عکس (اختیاری)",
          style: TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
        ),
        const SizedBox(height: 8),
        const Text(
          "می‌تونی عکس تجربه خریدت رو باهامون به اشتراک بذاری!",
          style: TextStyle(fontSize: 14, color: AppColors.hint),
        ),
        const SizedBox(height: 16),
        SingleChildScrollView(
          scrollDirection: Axis.horizontal,
          child: Row(
            children: [
              ...List.generate(_images.length, (index) {
                return Padding(
                  padding: const EdgeInsets.only(left: 8.0),
                  child: Stack(
                    clipBehavior: Clip.none,
                    children: [
                      ClipRRect(
                        borderRadius: BorderRadius.circular(12.0),
                        child: Image.file(
                          _images[index],
                          width: 80,
                          height: 80,
                          fit: BoxFit.cover,
                        ),
                      ),
                      Positioned(
                        top: -8,
                        right: -8,
                        child: GestureDetector(
                          onTap: () => _removeImage(index),
                          child: Container(
                            decoration: BoxDecoration(
                              color: Colors.red,
                              shape: BoxShape.circle,
                              border: Border.all(color: Colors.white, width: 2),
                            ),
                            child: const Icon(
                              Icons.close,
                              color: Colors.white,
                              size: 16,
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                );
              }),
              if (_images.length < 2)
                GestureDetector(
                  onTap: _showImageSourceActionSheet,
                  child: Container(
                    width: 80,
                    height: 80,
                    decoration: BoxDecoration(
                      color: Colors.grey.shade200,
                      borderRadius: BorderRadius.circular(12),
                      border: Border.all(
                        color: Colors.grey.shade400,
                        width: 1.5,
                        style: BorderStyle.solid,
                      ),
                    ),
                    child: const Icon(
                      Icons.add_a_photo_outlined,
                      color: Colors.grey,
                      size: 30,
                    ),
                  ),
                ),
            ],
          ),
        ),
      ],
    );
  }

  Widget _buildActionButtons() {
    return BlocConsumer<CommentBloc, CommentState>(
      listener: (context, state) {
        if (state is CommentSubmissionSuccess) {
          ScaffoldMessenger.of(context).showSnackBar(
            const SnackBar(
              content: Text('نظر شما با موفقیت ثبت شد. ممنونیم!'),
              backgroundColor: Colors.green,
              behavior: SnackBarBehavior.floating,
            ),
          );
          Navigator.of(context).pushAndRemoveUntil(
            MaterialPageRoute(builder: (_) => const OffersPage()),
            (route) => false,
          );
        } else if (state is CommentSubmissionFailure) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: Text(state.error),
              backgroundColor: Colors.red,
              behavior: SnackBarBehavior.floating,
            ),
          );
        }
      },
      builder: (context, state) {
        final isLoading = state is CommentSubmitting;
        return Column(
          children: [
            SizedBox(
              width: double.infinity,
              child: ElevatedButton(
                onPressed:
                    isLoading
                        ? null
                        : () {
                          context.read<CommentBloc>().add(
                            SubmitComment(
                              discountId: widget.discountId,
                              text: _commentController.text,
                              score: _rating,
                              images: _images,
                            ),
                          );
                        },
                style: ElevatedButton.styleFrom(
                  backgroundColor: AppColors.confirm,
                  foregroundColor: Colors.white,
                  padding: const EdgeInsets.symmetric(vertical: 16),
                  shape: RoundedRectangleBorder(
                    borderRadius: BorderRadius.circular(50),
                  ),
                ),
                child:
                    isLoading
                        ? const SizedBox(
                          width: 24,
                          height: 24,
                          child: CircularProgressIndicator(color: Colors.white),
                        )
                        : const Text('ارسال'),
              ),
            ),
            const SizedBox(height: 12),
            TextButton(
              onPressed:
                  isLoading
                      ? null
                      : () {
                        Navigator.of(context).pushAndRemoveUntil(
                          MaterialPageRoute(builder: (_) => const OffersPage()),
                          (route) => false,
                        );
                      },
              child: const Text(
                'رد شدن',
                style: TextStyle(color: Colors.black),
              ),
            ),
          ],
        );
      },
    );
  }
}