import 'package:flutter/material.dart';

import 'app_colors_base.dart';

@immutable
class AppThemeExtension extends ThemeExtension<AppThemeExtension> {
  final Color success;
  final Color warning;
  final Color danger;
  final Color textSecondary;

  const AppThemeExtension({
    required this.success,
    required this.warning,
    required this.danger,
    required this.textSecondary,
  });

  // 工厂方法，根据 AppColorsBase 创建
  factory AppThemeExtension.fromColors(AppColorsBase colors) {
    return AppThemeExtension(
      success: colors.success,
      warning: colors.warning,
      danger: colors.danger,
      textSecondary: colors.textSecondary,
    );
  }

  @override
  ThemeExtension<AppThemeExtension> copyWith({
    Color? success,
    Color? warning,
    Color? danger,
    Color? textSecondary,
  }) {
    return AppThemeExtension(
      success: success ?? this.success,
      warning: warning ?? this.warning,
      danger: danger ?? this.danger,
      textSecondary: textSecondary ?? this.textSecondary,
    );
  }

  @override
  AppThemeExtension lerp(AppThemeExtension? other, double t) {
    if (other == null) return this;
    return AppThemeExtension(
      success: Color.lerp(success, other.success, t)!,
      warning: Color.lerp(warning, other.warning, t)!,
      danger: Color.lerp(danger, other.danger, t)!,
      textSecondary: Color.lerp(textSecondary, other.textSecondary, t)!,
    );
  }
}

extension AppThemeExt on BuildContext {
  AppThemeExtension get themeEx => Theme.of(this).extension<AppThemeExtension>()!;

  Color get success => themeEx.success;

  Color get warning => themeEx.warning;

  Color get danger => themeEx.danger;

  Color get textSecondary => themeEx.textSecondary;
}