import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import '../constants.dart';
import '../models/weather_models.dart';

class WeatherDetailsSheet extends StatefulWidget {
  final Forecast forecast;
  final CurrentWeather current;

  const WeatherDetailsSheet({
    super.key,
    required this.forecast,
    required this.current,
  });

  @override
  State<WeatherDetailsSheet> createState() => _WeatherDetailsSheetState();
}

class _WeatherDetailsSheetState extends State<WeatherDetailsSheet> {
  late DraggableScrollableController _sheetController;

  @override
  void initState() {
    super.initState();
    _sheetController = DraggableScrollableController();
  }

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

  Future<void> _animateSheetUp() async {
    if (!_sheetController.isAttached) return;

    final currentSize = _sheetController.size;
    double targetSize;

    // Determine target size based on current position
    if (currentSize < 0.4) {
      // If small, expand to medium (0.6)
      targetSize = 0.6;
    } else if (currentSize < 0.75) {
      // If medium, expand to large (0.9)
      targetSize = 0.9;
    } else {
      // If large, collapse to small (0.2)
      targetSize = 0.2;
    }

    await _sheetController.animateTo(
      targetSize,
      duration: const Duration(milliseconds: 300),
      curve: Curves.easeOutCubic,
    );
  }

  @override
  Widget build(BuildContext context) {
    return DraggableScrollableSheet(
      controller: _sheetController,
      initialChildSize: 0.2,
      minChildSize: 0.15,
      maxChildSize: 0.9,
      builder: (BuildContext context, ScrollController scrollController) {
        return ClipRRect(
          borderRadius: const BorderRadius.only(
            topLeft: Radius.circular(24),
            topRight: Radius.circular(24),
          ),
          child: BackdropFilter(
            filter: ImageFilter.blur(sigmaX: 15.0, sigmaY: 15.0),
            child: Container(
              decoration: BoxDecoration(
                color: Colors.black.withOpacity(0.4),
                borderRadius: const BorderRadius.only(
                  topLeft: Radius.circular(24),
                  topRight: Radius.circular(24),
                ),
              ),
              child: Column(
                children: [
                  // Clickable header area
                  GestureDetector(
                    onTap: _animateSheetUp,
                    behavior: HitTestBehavior.opaque,
                    child: Container(
                      padding: const EdgeInsets.symmetric(vertical: 16),
                      child: Column(
                        children: [
                          Center(
                            child: Container(
                              width: 40,
                              height: 5,
                              decoration: BoxDecoration(
                                color: Colors.white.withOpacity(0.4),
                                borderRadius: BorderRadius.circular(12),
                              ),
                            ),
                          ),
                          const SizedBox(height: 8),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: [
                              Icon(
                                Icons.keyboard_arrow_up,
                                color: Colors.white.withOpacity(0.7),
                                size: 20,
                              ),
                              const SizedBox(width: 8),
                              Text(
                                'Tap to expand',
                                style: TextStyle(
                                  color: Colors.white.withOpacity(0.7),
                                  fontSize: 12,
                                  fontWeight: FontWeight.w500,
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                  ),
                  // Scrollable content
                  Expanded(
                    child: ListView(
                      controller: scrollController,
                      padding: const EdgeInsets.symmetric(
                        vertical: 12,
                        horizontal: 16,
                      ),
                      children: [
                        const SizedBox(height: 8),
                        _buildSectionTitle('Hourly Forecast'),
                        SizedBox(
                          height: 140,
                          child: ListView.builder(
                            scrollDirection: Axis.horizontal,
                            itemCount:
                                widget.forecast.forecastday[0].hour.length,
                            itemBuilder: (context, index) {
                              final hour =
                                  widget.forecast.forecastday[0].hour[index];
                              if (DateTime.parse(
                                hour.time,
                              ).isBefore(DateTime.now())) {
                                return const SizedBox.shrink();
                              }
                              return _HourlyForecastItem(hour: hour);
                            },
                          ),
                        ),
                        const Divider(color: Colors.white24, height: 32),
                        _buildSectionTitle('7-Day Forecast'),
                        ListView.builder(
                          shrinkWrap: true,
                          physics: const NeverScrollableScrollPhysics(),
                          itemCount: widget.forecast.forecastday.length,
                          itemBuilder: (context, index) {
                            final day = widget.forecast.forecastday[index];
                            return _DailyForecastItem(day: day);
                          },
                        ),
                        const Divider(color: Colors.white24, height: 32),
                        _buildSectionTitle('Current Details'),
                        _buildDetailsGrid(),
                      ],
                    ),
                  ),
                ],
              ),
            ),
          ),
        );
      },
    );
  }

  Widget _buildSectionTitle(String title) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 12.0),
      child: Text(
        title.toUpperCase(),
        style: TextStyle(
          color: Colors.white.withOpacity(0.7),
          fontSize: 14,
          fontWeight: FontWeight.bold,
          letterSpacing: 1.1,
        ),
      ),
    );
  }

  Widget _buildDetailsGrid() {
    final astro = widget.forecast.forecastday[0].astro;
    return GridView.count(
      crossAxisCount: 2,
      shrinkWrap: true,
      physics: const NeverScrollableScrollPhysics(),
      childAspectRatio: 2.1,
      mainAxisSpacing: 8,
      crossAxisSpacing: 8,
      children: [
        _DetailItem(
          title: 'Feels Like',
          value: '${widget.current.feelslikeC.round()}°',
        ),
        _DetailItem(title: 'UV Index', value: '${widget.current.uv.round()}'),
        _DetailItem(title: 'Humidity', value: '${widget.current.humidity}%'),
        _DetailItem(
          title: 'Wind',
          value: '${widget.current.windKph.round()} km/h',
        ),
        _DetailItem(title: 'Sunrise', value: astro.sunrise),
        _DetailItem(title: 'Sunset', value: astro.sunset),
      ],
    );
  }
}

class _HourlyForecastItem extends StatelessWidget {
  final Hour hour;
  const _HourlyForecastItem({required this.hour});

  @override
  Widget build(BuildContext context) {
    final time = DateFormat.j().format(DateTime.parse(hour.time));
    return Container(
      width: 80,
      padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 8),
      margin: const EdgeInsets.symmetric(horizontal: 4),
      decoration: BoxDecoration(
        color: kCardBackground,
        borderRadius: kCardBorderRadius,
      ),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(
            time,
            style: const TextStyle(
              color: Colors.white,
              fontSize: 14,
              fontWeight: FontWeight.w500,
            ),
          ),
          Image.network(hour.condition.icon, width: 40, height: 40),
          Text(
            '${hour.tempC.round()}°',
            style: const TextStyle(
              color: Colors.white,
              fontSize: 18,
              fontWeight: FontWeight.w600,
            ),
          ),
        ],
      ),
    );
  }
}

class _DailyForecastItem extends StatelessWidget {
  final ForecastDay day;
  const _DailyForecastItem({required this.day});

  @override
  Widget build(BuildContext context) {
    final date = DateTime.parse(day.date);
    final dayName = DateFormat.E().format(date);
    final isToday =
        DateFormat.yMd().format(date) ==
        DateFormat.yMd().format(DateTime.now());
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 10.0, horizontal: 4.0),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: [
          Text(
            isToday ? 'Today' : dayName,
            style: const TextStyle(
              color: Colors.white,
              fontSize: 18,
              fontWeight: FontWeight.w500,
            ),
          ),
          Image.network(day.day.condition.icon, width: 30, height: 30),
          Text(
            '${day.day.dailyChanceOfRain}%',
            style: TextStyle(
              color: Colors.blue.shade200,
              fontSize: 16,
              fontWeight: FontWeight.w500,
            ),
          ),
          Text(
            'H: ${day.day.maxtempC.round()}°  L: ${day.day.mintempC.round()}°',
            style: const TextStyle(
              color: Colors.white,
              fontSize: 16,
              fontWeight: FontWeight.w500,
            ),
          ),
        ],
      ),
    );
  }
}

class _DetailItem extends StatelessWidget {
  final String title;
  final String value;
  const _DetailItem({required this.title, required this.value});

  @override
  Widget build(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: kCardBackground,
        borderRadius: kCardBorderRadius,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Text(
            title.toUpperCase(),
            style: TextStyle(
              color: Colors.white.withOpacity(0.7),
              fontSize: 12,
              fontWeight: FontWeight.bold,
            ),
          ),
          const SizedBox(height: 4),
          Text(
            value,
            style: const TextStyle(
              color: Colors.white,
              fontSize: 20,
              fontWeight: FontWeight.w500,
            ),
          ),
        ],
      ),
    );
  }
}