import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:onufitness/constants/color_constant.dart';
import 'package:onufitness/utils/helper_function.dart';

class CustomDropdownField extends StatefulWidget {
  final String title;
  String? selectedItem;
  final List<String> items;
  final ValueChanged<String?>? onChanged;
  final Color? borderColor;
  final Color? filledColor;
  final double? height;
  final bool isSearchEnabled;

  CustomDropdownField({
    super.key,
    required this.title,
    required this.items,
    this.selectedItem,
    this.onChanged,
    this.borderColor,
    this.filledColor,
    this.height,
    this.isSearchEnabled = false,
  });

  @override
  CustomDropdownFieldState createState() => CustomDropdownFieldState();
}

int countryIndex = 0;

class CustomDropdownFieldState extends State<CustomDropdownField> {
  final TextEditingController _searchController = TextEditingController();

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

  void _showSearchableDropdown() {
    // Reset search controller when opening dialog
    _searchController.clear();
    List<String> filteredItems = widget.items; // Initialize with all items
    if (widget.items.isEmpty) return;
    showDialog(
      context: context,
      builder: (BuildContext context) {
        return StatefulBuilder(
          builder: (context, setDialogState) {
            void filterItems(String query) {
              setDialogState(() {
                if (query.isEmpty) {
                  filteredItems = widget.items;
                } else {
                  filteredItems =
                      widget.items
                          .where(
                            (item) => item.toLowerCase().contains(
                              query.toLowerCase(),
                            ),
                          )
                          .toList();
                }
              });
            }

            return Dialog(
              shape: RoundedRectangleBorder(
                borderRadius: BorderRadius.circular(10.r),
              ),
              child: Container(
                constraints: BoxConstraints(maxHeight: 400.h),
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    // Search field
                    Padding(
                      padding: EdgeInsets.all(16.w),
                      child: TextField(
                        controller: _searchController,
                        autofocus: false,
                        decoration: InputDecoration(
                          hintText: 'Search ${widget.title}',
                          prefixIcon: const Icon(Icons.search),
                          suffixIcon:
                              _searchController.text.isNotEmpty
                                  ? IconButton(
                                    icon: const Icon(Icons.clear),
                                    onPressed: () {
                                      _searchController.clear();
                                      filterItems('');
                                    },
                                  )
                                  : null,
                          border: OutlineInputBorder(
                            borderRadius: BorderRadius.circular(10.r),
                          ),
                          contentPadding: EdgeInsets.symmetric(
                            horizontal: 16.w,
                            vertical: 12.h,
                          ),
                        ),
                        onChanged: (value) {
                          filterItems(value);
                        },
                      ),
                    ),
                    // Items list
                    Expanded(
                      child:
                          filteredItems.isEmpty
                              ? Center(
                                child: Text(
                                  'No items found',
                                  style: TextStyle(
                                    fontSize: 16.sp,
                                    color: greyTextColor1,
                                  ),
                                ),
                              )
                              : ListView.builder(
                                shrinkWrap: true,
                                itemCount: filteredItems.length,
                                itemBuilder: (context, index) {
                                  final item = filteredItems[index];
                                  final isSelected =
                                      widget.selectedItem == item;
                                  return ListTile(
                                    title: Text(
                                      item,
                                      style: TextStyle(
                                        fontSize: isTablet ? 14.sp : 16.sp,
                                        fontWeight:
                                            isSelected
                                                ? FontWeight.w600
                                                : FontWeight.normal,
                                        color:
                                            isSelected
                                                ? Theme.of(context).primaryColor
                                                : Colors.black,
                                      ),
                                    ),
                                    trailing:
                                        isSelected
                                            ? Icon(
                                              Icons.check,
                                              color:
                                                  Theme.of(
                                                    context,
                                                  ).primaryColor,
                                            )
                                            : null,
                                    onTap: () {
                                      widget.selectedItem = item;

                                      widget.onChanged?.call(item);
                                      Navigator.pop(context);
                                    },
                                  );
                                },
                              ),
                    ),
                  ],
                ),
              ),
            );
          },
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    final Color effectiveBorderColor =
        widget.borderColor ?? textfieldBorderColorSky1;

    if (widget.isSearchEnabled) {
      return GestureDetector(
        onTap: widget.items.isNotEmpty ? _showSearchableDropdown : null,
        child: Container(
          height: widget.height ?? (isTablet ? 60.h : null),
          padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 16.h),
          decoration: BoxDecoration(
            border: Border.all(color: effectiveBorderColor),
            borderRadius: BorderRadius.circular(10.r),
            color: widget.filledColor ?? textFieldFillColor,
          ),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              Expanded(
                child: Text(
                  widget.selectedItem != null && widget.selectedItem!.isNotEmpty
                      ? widget.selectedItem!
                      : widget.title,
                  style: TextStyle(
                    fontSize: isTablet ? 17.sp : 16.sp,
                    color:
                        widget.selectedItem != null &&
                                widget.selectedItem!.isNotEmpty
                            ? Colors.black
                            : greyTextColor1,
                    fontWeight: FontWeight.w500,
                  ),
                  overflow: TextOverflow.ellipsis,
                ),
              ),
              SizedBox(width: 8.w),
              Icon(
                Icons.keyboard_arrow_down,
                size: isTablet ? 30.sp : 24.sp,
                color: widget.items.isEmpty ? Colors.grey.shade400 : null,
              ),
            ],
          ),
        ),
      );
    }

    return Container(
      height: widget.height ?? (isTablet ? 60.h : null),
      padding: EdgeInsets.symmetric(horizontal: 16.w, vertical: 3.h),
      decoration: BoxDecoration(
        border: Border.all(color: effectiveBorderColor),
        borderRadius: BorderRadius.circular(10.r),
        color: widget.filledColor ?? textFieldFillColor,
      ),
      child: DropdownButtonHideUnderline(
        child: DropdownButton<String>(
          value:
              (widget.selectedItem == null || widget.selectedItem!.isEmpty)
                  ? null
                  : widget.selectedItem,
          hint: Text(
            widget.title,
            style: TextStyle(
              fontSize: isTablet ? 17.sp : 16.sp,
              color: greyTextColor1,
              fontWeight: FontWeight.w500,
            ),
          ),
          icon: Icon(Icons.keyboard_arrow_down, size: isTablet ? 30.sp : null),
          isExpanded: true,
          items: List.generate(widget.items.length, (index) {
            countryIndex = index;
            final value = widget.items[index];
            return DropdownMenuItem<String>(
              value: value,
              child: Text(
                value,
                style: TextStyle(fontSize: isTablet ? 14.sp : 16.sp),
              ),
            );
          }),
          onChanged: widget.onChanged,
          dropdownColor: Colors.white,
          borderRadius: BorderRadius.circular(10.r),
          menuMaxHeight: 200.h,
        ),
      ),
    );
  }
}