import 'dart:io';

import 'package:flutter/material.dart';

enum AvatarTypes {
  initials,
  icon,
  image,
}

class CustomCircleAvatar extends StatelessWidget {
  final String? initials;
  final Icon? icon;
  final File? image;
  final Function ()? editImageCallback;
  final double radius;

  const CustomCircleAvatar({
    Key? key,
    this.initials,
    this.icon,
    this.image,
    this.editImageCallback,
    this.radius = 20,
  }) : super(key: key);

  Widget avatar() {
    AvatarTypes? type;

    if (icon != null) {
      type = AvatarTypes.icon;
    }

    if (initials != null) {
      type = AvatarTypes.initials;
    }

    if (image != null) {
      type = AvatarTypes.image;
    }

    if (type == null) {
      throw ArgumentError('Invalid arguments passed to CustomCircleAvatar');
    }

    if (type == AvatarTypes.initials) {
      return CircleAvatar(
        backgroundColor: Colors.grey[300],
        child: Text(initials!),
        radius: radius,
      );
    }

    if (type == AvatarTypes.icon) {
      return CircleAvatar(
        backgroundColor: Colors.grey[300],
        child: icon,
        radius: radius,
      );
    }

    return Container(
      width: radius * 2,
      height: radius * 2,
      decoration: BoxDecoration(
        shape: BoxShape.circle,
        image: DecorationImage(
          image: Image.file(image!).image,
          fit: BoxFit.fill
        ),
      ),
    );
  }

  Widget editIcon(BuildContext context) {
    if (editImageCallback == null) {
      return const SizedBox.shrink();
    }

    return SizedBox(
      height: (radius * 2),
      width: (radius * 2),
      child: Align(
        alignment: Alignment.bottomRight,
        child: GestureDetector(
          onTap: editImageCallback,
          child: Container(
            height: (radius / 2) + (radius / 7),
            width: (radius / 2) + (radius / 7),
            decoration: BoxDecoration(
              color: Theme.of(context).scaffoldBackgroundColor,
              borderRadius: BorderRadius.circular(30),
            ),
            child: Icon(
              Icons.add,
              color: Theme.of(context).primaryColor,
              size: radius / 2
            ),
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        avatar(),
        editIcon(context),
      ]
    );
  }
}