import 'dart:developer';

import 'package:wanisclient/config/AppSnackbar.dart';
import 'package:wanisclient/config/custom_text.dart';
import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:provider/provider.dart';

import '../config/enum/ride_enum.dart';
import '../providers/ride_providers.dart';
import '../services/SystemInsetsService.dart';
import '../utils/colors.dart';
import 'TimeSheet.dart';
import 'dow.dart';
import 'monthGrid.dart';

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

  @override
  State<SchedulePickupWidget> createState() => _SchedulePickupWidgetState();
}

class _SchedulePickupWidgetState extends State<SchedulePickupWidget> {
  DateTime selectedDate = DateTime.now();
  TimeOfDay selectedTime = const TimeOfDay(hour: 6, minute: 0);
  double _systembottompadding = 0;
  final dfHeader = DateFormat('MMMM'); // month title
  final dfTime = DateFormat('hh:mm a');

  @override
  void initState() {
    super.initState();
    final rideprovider = Provider.of<RidesProvider>(context, listen: false);
    if (rideprovider.ridestartdatetime != null) {
      selectedDate = rideprovider.ridestartdatetime!;
      selectedTime = TimeOfDay.fromDateTime(rideprovider.ridestartdatetime!);
    }
    WidgetsBinding.instance.addPostFrameCallback((_) {
      _loadSystemPadding();
    });
  }

  Future<void> _loadSystemPadding() async {
    final pad = await SystemInsetsService.instance.bottomPadding(context);
    log("pad :_loadSystemPadding() $pad");
    if (mounted) setState(() => _systembottompadding = pad);
  }


  @override
  Widget build(BuildContext context) {
    final rideprovider = context.watch<RidesProvider>();
    final now = DateTime.now();

    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        backgroundColor: Colors.white,
        elevation: 0,
        leading: IconButton(
          onPressed: () {
            rideprovider.updateCurrentstate(RideEnum.idle);
            rideprovider.updateCoupon("");
          },
          icon: const Icon(Icons.arrow_back),
          style: IconButton.styleFrom(
            backgroundColor: AppNewColors.backgroundPurpleColor2,         // circle bg
            foregroundColor: Colors.black,         // icon color
            shape: const CircleBorder(),           // make it round
            fixedSize: const Size(40, 40),         // exact size
            padding: EdgeInsets.zero,              // tight touch target
          ),
        ),

      ),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // title
          const Padding(
            padding: EdgeInsets.fromLTRB(16, 4, 16, 10),
            child: Txt(
              text: 'When are you going?',
              style: TextStyle(fontSize: 35, fontWeight: FontWeight.w700),
            ),
          ),

          // days of week (mon..sun)
          const Padding(
            padding: EdgeInsets.symmetric(horizontal: 16),
            child: Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                dow('MON'), dow('TUE'), dow('WED'), dow('THU'),
                dow('FRI'), dow('SAT'), dow('SUN'),
              ],
            ),
          ),
          const SizedBox(height: 6),

          // months list
          Expanded(
            child: ListView.builder(
              padding: const EdgeInsets.symmetric(horizontal: 16,),
              itemCount: 12, // show next 6 months; adjust if needed
              itemBuilder: (_, i) {
                final firstOfMonth = DateTime(now.year, now.month + i, 1);
                return monthGrid(
                  monthStart: firstOfMonth,
                  selected: selectedDate,
                  onSelect: (d) {
                    final today = DateTime(now.year, now.month, now.day);
                    // Prevent selection if the date is in the past
                    if (d.isBefore(today)) {
                      return;
                    }
                    setState(() => selectedDate = d);
                    _openTimeSheet(context, rideprovider,_systembottompadding);
                  },
                );
              },
            ),
          ),
        ],
      ),
    );
  }

  // ===== modal =====
  Future<void> _openTimeSheet(BuildContext context, RidesProvider rideprovider,double systembottompadding) async {
    await showModalBottomSheet(
      context: context,
      isScrollControlled: false,
      backgroundColor: Colors.transparent,
      builder: (_) {
        return TimeSheet(
          systembottompadding:systembottompadding,
          initialTime: selectedTime,
          onPickTime: (t) async {
            // pick via native time picker
            final picked = await showTimePicker(context: context, initialTime: t);
            return picked ?? t;
          },
          onConfirm: (t) {
            final combined = DateTime(
              selectedDate.year,
              selectedDate.month,
              selectedDate.day,
              t.hour,
              t.minute,
            );

            // Check if the combined date and time is in the past
            if (combined.isBefore(DateTime.now())) {
              AppSnackbar.showInfo("Info", "You cannot select a date or time in the past.");

              return; // Exit without saving
            }

            // If valid, update everything
            setState(() => selectedTime = t);
            rideprovider.updateridestartdatetime(combined);
            rideprovider.updateCurrentstate(RideEnum.choose_ride);
            Navigator.of(context).maybePop(); // close sheet
            Navigator.of(context).maybePop(); // leave scheduler
          },
          formatter: (t) => dfTime.format(DateTime(0, 1, 1, t.hour, t.minute)),
        );
      },
    );
  }
}