import 'package:flutter/material.dart';
import 'package:mobile_monitoring/core/constants/colors.dart';
import 'package:mobile_monitoring/core/constants/app_settings.dart';

/// Custom Button - Berbagai jenis button yang reusable
class CustomButton extends StatelessWidget {
  final String text;
  final VoidCallback? onPressed;
  final bool isLoading;
  final ButtonType type;
  final ButtonSize size;
  final IconData? icon;
  final Color? backgroundColor;
  final Color? textColor;
  final double? width;
  final double? height;

  const CustomButton({
    super.key,
    required this.text,
    this.onPressed,
    this.isLoading = false,
    this.type = ButtonType.primary,
    this.size = ButtonSize.medium,
    this.icon,
    this.backgroundColor,
    this.textColor,
    this.width,
    this.height,
  });

  @override
  Widget build(BuildContext context) {
    final isDisabled = onPressed == null || isLoading;
    
    return SizedBox(
      width: width,
      height: height ?? _getHeight(),
      child: _buildButton(context, isDisabled),
    );
  }

  Widget _buildButton(BuildContext context, bool isDisabled) {
    switch (type) {
      case ButtonType.primary:
        return ElevatedButton(
          onPressed: isDisabled ? null : onPressed,
          style: ElevatedButton.styleFrom(
            backgroundColor: backgroundColor ?? AppColors.primary,
            foregroundColor: textColor ?? AppColors.white,
            padding: _getPadding(),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(AppSettings.defaultBorderRadius),
            ),
            elevation: 2,
          ),
          child: _buildContent(),
        );
      case ButtonType.secondary:
        return OutlinedButton(
          onPressed: isDisabled ? null : onPressed,
          style: OutlinedButton.styleFrom(
            foregroundColor: backgroundColor ?? AppColors.primary,
            side: BorderSide(
              color: backgroundColor ?? AppColors.primary,
              width: 1.5,
            ),
            padding: _getPadding(),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(AppSettings.defaultBorderRadius),
            ),
          ),
          child: _buildContent(),
        );
      case ButtonType.text:
        return TextButton(
          onPressed: isDisabled ? null : onPressed,
          style: TextButton.styleFrom(
            foregroundColor: backgroundColor ?? AppColors.primary,
            padding: _getPadding(),
          ),
          child: _buildContent(),
        );
      case ButtonType.danger:
        return ElevatedButton(
          onPressed: isDisabled ? null : onPressed,
          style: ElevatedButton.styleFrom(
            backgroundColor: AppColors.error,
            foregroundColor: AppColors.white,
            padding: _getPadding(),
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(AppSettings.defaultBorderRadius),
            ),
            elevation: 2,
          ),
          child: _buildContent(),
        );
    }
  }

  Widget _buildContent() {
    if (isLoading) {
      return SizedBox(
        height: _getIndicatorSize(),
        width: _getIndicatorSize(),
        child: CircularProgressIndicator(
          strokeWidth: 2,
          valueColor: AlwaysStoppedAnimation<Color>(
            type == ButtonType.primary || type == ButtonType.danger
                ? AppColors.white
                : AppColors.primary,
          ),
        ),
      );
    }

    if (icon != null) {
      return Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(icon, size: _getIconSize()),
          const SizedBox(width: 8),
          Text(text, style: TextStyle(fontSize: _getFontSize())),
        ],
      );
    }

    return Text(text, style: TextStyle(fontSize: _getFontSize()));
  }

  double _getHeight() {
    switch (size) {
      case ButtonSize.small:
        return 36;
      case ButtonSize.medium:
        return 48;
      case ButtonSize.large:
        return 56;
    }
  }

  EdgeInsets _getPadding() {
    switch (size) {
      case ButtonSize.small:
        return const EdgeInsets.symmetric(horizontal: 16, vertical: 8);
      case ButtonSize.medium:
        return const EdgeInsets.symmetric(horizontal: 24, vertical: 12);
      case ButtonSize.large:
        return const EdgeInsets.symmetric(horizontal: 32, vertical: 16);
    }
  }

  double _getFontSize() {
    switch (size) {
      case ButtonSize.small:
        return 14;
      case ButtonSize.medium:
        return 16;
      case ButtonSize.large:
        return 18;
    }
  }

  double _getIconSize() {
    switch (size) {
      case ButtonSize.small:
        return 18;
      case ButtonSize.medium:
        return 20;
      case ButtonSize.large:
        return 24;
    }
  }

  double _getIndicatorSize() {
    switch (size) {
      case ButtonSize.small:
        return 16;
      case ButtonSize.medium:
        return 20;
      case ButtonSize.large:
        return 24;
    }
  }
}

enum ButtonType { primary, secondary, text, danger }

enum ButtonSize { small, medium, large }