import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import '../../core/services/chit_group_service.dart';
import '../../core/models/chit_group.dart';
import '../../core/design_system/app_components/app_scaffold.dart';
import '../../core/design_system/app_components/state_view.dart';
import '../../shared/widgets/empty_state_widget.dart';
import 'create_group_dialog.dart';
import 'import_existing_group_dialog.dart';
import 'member_selection_dialog.dart';
import 'group_details_page.dart';
import 'combined_draw_dialog.dart';

class ChitGroupsPage extends StatelessWidget {
  const ChitGroupsPage({super.key});

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;

    return AppScaffold(
      title: 'My Chitfunds',
      actions: [
        PopupMenuButton<String>(
          icon: Icon(Icons.add, size: 24.w),
          onSelected: (value) {
            if (value == 'create') {
              _showCreateGroupDialog(context);
            } else if (value == 'import') {
              _showImportGroupDialog(context);
            }
          },
          itemBuilder: (context) => [
            PopupMenuItem(
              value: 'create',
              child: Row(
                children: [
                  Icon(Icons.add_circle, color: scheme.primary, size: 20.w),
                  SizedBox(width: 12.w),
                  const Text('Create New Group'),
                ],
              ),
            ),
            PopupMenuItem(
              value: 'import',
              child: Row(
                children: [
                  Icon(Icons.upload, color: scheme.secondary, size: 20.w),
                  SizedBox(width: 12.w),
                  const Text('Import Existing Group'),
                ],
              ),
            ),
          ],
        ),
      ],
      body: Obx(() {
        final service = ChitGroupService.to;

        return StateView(
          isLoading: service.isLoading.value,
          isEmpty: service.chitGroups.isEmpty,
          emptyType: EmptyStateType.noGroups,
          emptyTitle: 'No chit groups yet',
          emptyMessage: 'Create a new chit group or import an existing one.',
          onRetry: () => service.loadManagerChitGroups(),
          child: RefreshIndicator(
            onRefresh: () => service.loadManagerChitGroups(),
            child: ListView.builder(
              padding: EdgeInsets.all(12.w),
              itemCount: service.chitGroups.length,
              itemBuilder: (context, index) {
                final group = service.chitGroups[index];
                return _buildGroupCard(context, group);
              },
            ),
          ),
        );
      }),
    );
  }

  Widget _buildGroupCard(BuildContext context, ChitGroup group) {
    return Card(
      margin: EdgeInsets.only(bottom: 12.h),
      elevation: 2,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(12.r),
      ),
      child: InkWell(
        onTap: () => _showGroupDetails(context, group),
        borderRadius: BorderRadius.circular(12.r),
        child: Padding(
          padding: EdgeInsets.all(16.w),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Expanded(
                    child: Text(
                      group.name,
                      style: TextStyle(
                        fontSize: 18.sp,
                        fontWeight: FontWeight.w600,
                        color: Colors.grey.shade800,
                      ),
                    ),
                  ),
                  _buildStatusChip(group.status),
                ],
              ),
              SizedBox(height: 16.h),
              
              // Group details - Mobile optimized layout
              Column(
                children: [
                  Row(
                    children: [
                      Expanded(
                        child: _buildDetailItem(
                          'Total Value',
                          '₹${group.totalValue.toStringAsFixed(0)}',
                          Icons.currency_rupee,
                        ),
                      ),
                      SizedBox(width: 8.w),
                      Expanded(
                        child: _buildDetailItem(
                          'Monthly',
                          '₹${group.monthlyInstallment.toStringAsFixed(0)}',
                          Icons.payment,
                        ),
                      ),
                    ],
                  ),
                  SizedBox(height: 12.h),
                  Row(
                    children: [
                      Expanded(
                        child: _buildDetailItem(
                          'Members',
                          '${group.currentMemberCount}/${group.maxMembers}',
                          Icons.people,
                        ),
                      ),
                      SizedBox(width: 8.w),
                      Expanded(
                        child: _buildDetailItem(
                          'Duration',
                          '${group.durationMonths} months',
                          Icons.calendar_today,
                        ),
                      ),
                    ],
                  ),
                ],
              ),
              SizedBox(height: 16.h),
              
              // Action buttons - Mobile optimized
              if (group.isForming) ...[
                Column(
                  children: [
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        onPressed: () => _showAddMemberDialog(context, group),
                        icon: Icon(Icons.person_add, size: 18.w),
                        label: Text(
                          'Add Member',
                          style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
                        ),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.blue.shade600,
                          foregroundColor: Colors.white,
                          padding: EdgeInsets.symmetric(vertical: 12.h),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(8.r),
                          ),
                        ),
                      ),
                    ),
                    SizedBox(height: 8.h),
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        onPressed: group.canStart ? () => _startGroup(group) : null,
                        icon: Icon(Icons.play_arrow, size: 18.w),
                        label: Text(
                          'Start Group',
                          style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
                        ),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.green.shade600,
                          foregroundColor: Colors.white,
                          padding: EdgeInsets.symmetric(vertical: 12.h),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(8.r),
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ] else if (group.isActive) ...[
                Column(
                  children: [
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        onPressed: () => _showGroupDetails(context, group),
                        icon: Icon(Icons.visibility, size: 18.w),
                        label: Text(
                          'View Details',
                          style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
                        ),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.orange.shade600,
                          foregroundColor: Colors.white,
                          padding: EdgeInsets.symmetric(vertical: 12.h),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(8.r),
                          ),
                        ),
                      ),
                    ),
                    SizedBox(height: 8.h),
                    SizedBox(
                      width: double.infinity,
                      child: ElevatedButton.icon(
                        onPressed: () => _conductDraw(context, group),
                        icon: Icon(Icons.casino, size: 18.w),
                        label: Text(
                          'Conduct Draw',
                          style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
                        ),
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.purple.shade600,
                          foregroundColor: Colors.white,
                          padding: EdgeInsets.symmetric(vertical: 12.h),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(8.r),
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ] else ...[
                SizedBox(
                  width: double.infinity,
                  child: ElevatedButton.icon(
                    onPressed: () => _showGroupDetails(context, group),
                    icon: Icon(Icons.visibility, size: 18.w),
                    label: Text(
                      'View Details',
                      style: TextStyle(fontSize: 14.sp, fontWeight: FontWeight.w500),
                    ),
                    style: ElevatedButton.styleFrom(
                      backgroundColor: Colors.grey.shade600,
                      foregroundColor: Colors.white,
                      padding: EdgeInsets.symmetric(vertical: 12.h),
                      shape: RoundedRectangleBorder(
                        borderRadius: BorderRadius.circular(8.r),
                      ),
                    ),
                  ),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildStatusChip(String status) {
    Color color;
    String label;
    
    switch (status) {
      case 'forming':
        color = Colors.orange;
        label = 'Forming';
        break;
      case 'active':
        color = Colors.green;
        label = 'Active';
        break;
      case 'completed':
        color = Colors.grey;
        label = 'Completed';
        break;
      default:
        color = Colors.grey;
        label = status;
    }
    
    return Container(
      padding: EdgeInsets.symmetric(horizontal: 12.w, vertical: 6.h),
      decoration: BoxDecoration(
        color: color.withOpacity(0.1),
        borderRadius: BorderRadius.circular(16.r),
        border: Border.all(color: color, width: 1.5),
      ),
      child: Text(
        label,
        style: TextStyle(
          color: color,
          fontSize: 14.sp,
          fontWeight: FontWeight.w600,
        ),
      ),
    );
  }

  Widget _buildDetailItem(String label, String value, IconData icon) {
    return Container(
      padding: EdgeInsets.all(12.w),
      decoration: BoxDecoration(
        color: Colors.grey.shade50,
        borderRadius: BorderRadius.circular(8.r),
        border: Border.all(color: Colors.grey.shade200),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(icon, size: 18.w, color: Colors.grey.shade600),
              SizedBox(width: 6.w),
              Expanded(
                child: Text(
                  label,
                  style: TextStyle(
                    fontSize: 14.sp,
                    color: Colors.grey.shade600,
                    fontWeight: FontWeight.w500,
                  ),
                  overflow: TextOverflow.ellipsis,
                ),
              ),
            ],
          ),
          SizedBox(height: 8.h),
          Text(
            value,
            style: TextStyle(
              fontSize: 16.sp,
              fontWeight: FontWeight.w600,
              color: Colors.grey.shade800,
            ),
            overflow: TextOverflow.ellipsis,
          ),
        ],
      ),
    );
  }

  void _showCreateGroupDialog(BuildContext context) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (context) => const CreateGroupDialog(),
    );
  }

  void _showImportGroupDialog(BuildContext context) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (context) => const ImportExistingGroupDialog(),
    ).then((result) {
      if (result == true) {
        // Reload groups after successful import
        ChitGroupService.to.loadManagerChitGroups();
      }
    });
  }

  void _showAddMemberDialog(BuildContext context, ChitGroup group) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (context) => MemberSelectionDialog(group: group),
    );
  }

  void _showGroupDetails(BuildContext context, ChitGroup group) {
    Get.to(() => GroupDetailsPage(group: group));
  }

  void _startGroup(ChitGroup group) async {
    final success = await ChitGroupService.to.startChitGroup(group.id);
    if (success) {
      Get.snackbar('Success', 'Chit group started successfully');
    }
  }

  void _conductDraw(BuildContext context, ChitGroup group) {
    showDialog(
      context: context,
      barrierDismissible: false,
      builder: (context) => CombinedDrawDialog(group: group),
    );
  }
}