import 'package:flutter/material.dart';
import '../../enumerations.dart';
import '../../services/auth/auth_service.dart';
import '../../services/user_service.dart';
import '../constants.dart';
import 'profile_category_form.dart';
import 'sectors_form.dart';

class SkillsForm extends StatelessWidget {
  SkillsForm({
    super.key,
    required this.isRegProcess,
    required this.skillsSought,
    required this.isEditMode,
  });

  final AuthService _authService = AuthService();

  final bool isRegProcess;
  final bool skillsSought; // flag to toggle offered and sought skills
  final bool isEditMode;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<SkillOption>>(
      future: UserService.getSkillsFromFirebase(
        skillsSought,
        _authService.getCurrentUser()!.uid,
      ),
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          // Show loading indicator while fetching data
          return const CircularProgressIndicator();
        } else if (snapshot.hasError) {
          return Text('Error: ${snapshot.error}');
        } else {
          List<SkillOption>? userSkills = snapshot.data;
          return ProfileCategoryForm(
            title: 'Skills',
            header: skillsSought
                ? 'Skills you are searching for'
                : 'Your own skills',
            description: skillsSought
                ? 'Choose up to ${Constants.maxSkills} areas you are looking for in a co-founder'
                : 'Select up to ${Constants.maxSkills} areas in which you are skilled',
            saveButtonText: isRegProcess ? 'Save and continue' : 'Save',
            options: SkillOption.values.toList(), // Convert enum values to list
            minSelections: 1,
            maxSelections: Constants.maxSkills,
            preSelectedOptions:
                userSkills ?? [], // Pass pre-selected skills to the form
            onSave: (selectedOptions) async {
              // Handle saving selected options
              bool success = await UserService.saveSkillsToFirebase(
                selectedOptions.cast<SkillOption>(),
                skillsSought,
                _authService.getCurrentUser()!.uid,
              );

              // Then navigate to another screen or perform any other action
              if (context.mounted) {
                if (success) {
                  if (isRegProcess && skillsSought) {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        // set following registration page HERE
                        builder: (context) => SectorsForm(
                          isRegProcess: isRegProcess,
                          isEditMode: false,
                        ),
                      ),
                    );
                  } else if (isRegProcess) {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                        builder: (context) => SkillsForm(
                          isRegProcess: isRegProcess,
                          skillsSought: true,
                          isEditMode: false,
                        ),
                      ),
                    );
                  } else {
                    if (isEditMode == true) {
                      // pass selectedOptions data back to caller
                      String keyToUpdate = skillsSought
                          ? Constants.dbFieldUsersSkillsSought
                          : Constants.dbFieldUsersSkills;

                      Navigator.pop(context, {
                        keyToUpdate: selectedOptions,
                      });
                    } else {
                      // Navigate back after saving
                      Navigator.pop(context);
                    }
                  }
                } else {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(
                      content: Text('Failed to save user skills.'),
                    ),
                  );
                }
              }
            },
          );
        }
      },
    );
  }
}