import 'package:flutter/material.dart';

import 'package:notas/theme/app_palette.dart';
import 'package:notas/widgets/category_style.dart';

class CategoryDraft {
  const CategoryDraft({
    required this.name,
    required this.colorValue,
    required this.iconCodePoint,
  });

  final String name;
  final int colorValue;
  final int iconCodePoint;
}

Future<CategoryDraft?> showCategoryEditorDialog({
  required BuildContext context,
  required String title,
  required String confirmLabel,
  String? initialName,
  int? initialColorValue,
  int? initialIconCodePoint,
}) async {
  final TextEditingController controller = TextEditingController(
    text: initialName ?? '',
  );
  final List<Color> colorOptions = CategoryStyle.colorsOf(context);
  final List<IconData> iconOptions = CategoryStyle.icons;
  final int fallbackColorValue =
      initialColorValue ?? colorOptions.first.toARGB32();
  final int fallbackIconCodePoint =
      initialIconCodePoint ?? iconOptions.first.codePoint;

  try {
    final CategoryDraft? result = await showDialog<CategoryDraft>(
      context: context,
      builder: (BuildContext dialogContext) {
        final AppPalette palette = Theme.of(dialogContext).extension<AppPalette>() ??
            AppPalette.fromBrightness(Theme.of(dialogContext).brightness);
        final List<Color> dialogColorOptions = CategoryStyle.colorsOf(
          dialogContext,
        );
        final List<IconData> dialogIconOptions = CategoryStyle.icons;

        int selectedColorValue = fallbackColorValue;
        int selectedIconCodePoint = fallbackIconCodePoint;

        return StatefulBuilder(
          builder: (BuildContext context, StateSetter setDialogState) {
            final Color previewColor = Color(selectedColorValue);

            return AlertDialog(
              backgroundColor: palette.surfaceElevated,
              title: Text(title),
              content: SingleChildScrollView(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    TextField(
                      controller: controller,
                      autofocus: true,
                      textInputAction: TextInputAction.done,
                      decoration: const InputDecoration(
                        hintText: 'Nombre de la categoría',
                      ),
                      onSubmitted: (String value) {
                        final String name = value.trim();
                        if (name.isEmpty) {
                          return;
                        }

                        Navigator.of(dialogContext).pop(
                          CategoryDraft(
                            name: name,
                            colorValue: selectedColorValue,
                            iconCodePoint: selectedIconCodePoint,
                          ),
                        );
                      },
                    ),
                    const SizedBox(height: 20),
                    Text(
                      'Color',
                      style: TextStyle(
                        color: palette.textSecondary,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                    const SizedBox(height: 10),
                    Wrap(
                      spacing: 10,
                      runSpacing: 10,
                      children: [
                        for (final Color color in dialogColorOptions)
                          InkWell(
                            borderRadius: BorderRadius.circular(999),
                            onTap: () {
                              setDialogState(() {
                                selectedColorValue = color.toARGB32();
                              });
                            },
                            child: AnimatedContainer(
                              duration: const Duration(milliseconds: 160),
                              width: 42,
                              height: 42,
                              decoration: BoxDecoration(
                                shape: BoxShape.circle,
                                color: color,
                                border: Border.all(
                                  color: selectedColorValue == color.toARGB32()
                                      ? palette.textPrimary
                                      : palette.border,
                                  width: selectedColorValue == color.toARGB32()
                                      ? 2.5
                                      : 1,
                                ),
                                boxShadow: [
                                  BoxShadow(
                                    color: color.withValues(alpha: 0.0),
                                    blurRadius: 10,
                                    offset: const Offset(0, 4),
                                  ),
                                ],
                              ),
                              child: selectedColorValue == color.toARGB32()
                                  ? Icon(
                                      Icons.check,
                                      size: 18,
                                      color: color.computeLuminance() > 0.5
                                          ? Colors.black
                                          : Colors.white,
                                    )
                                  : null,
                            ),
                          ),
                      ],
                    ),
                    const SizedBox(height: 20),
                    Text(
                      'Icono',
                      style: TextStyle(
                        color: palette.textSecondary,
                        fontWeight: FontWeight.w600,
                      ),
                    ),
                    const SizedBox(height: 10),
                    Wrap(
                      spacing: 8,
                      runSpacing: 8,
                      children: [
                        for (final IconData icon in dialogIconOptions)
                          InkWell(
                            borderRadius: BorderRadius.circular(14),
                            onTap: () {
                              setDialogState(() {
                                selectedIconCodePoint = icon.codePoint;
                              });
                            },
                            child: AnimatedContainer(
                              duration: const Duration(milliseconds: 160),
                              width: 50,
                              height: 50,
                              decoration: BoxDecoration(
                                color: selectedIconCodePoint == icon.codePoint
                                    ? previewColor.withValues(alpha: 0.14)
                                    : palette.fill,
                                borderRadius: BorderRadius.circular(14),
                                border: Border.all(
                                  color: selectedIconCodePoint == icon.codePoint
                                      ? previewColor
                                      : palette.border,
                                  width: selectedIconCodePoint == icon.codePoint
                                      ? 2
                                      : 1,
                                ),
                              ),
                              child: Icon(
                                icon,
                                color: selectedIconCodePoint == icon.codePoint
                                    ? previewColor
                                    : palette.textSecondary,
                              ),
                            ),
                          ),
                      ],
                    ),
                  ],
                ),
              ),
              actions: [
                TextButton(
                  onPressed: () => Navigator.of(dialogContext).pop(),
                  child: const Text('Cancelar'),
                ),
                FilledButton(
                  onPressed: () {
                    final String name = controller.text.trim();
                    if (name.isEmpty) {
                      return;
                    }

                    Navigator.of(dialogContext).pop(
                      CategoryDraft(
                        name: name,
                        colorValue: selectedColorValue,
                        iconCodePoint: selectedIconCodePoint,
                      ),
                    );
                  },
                  child: Text(confirmLabel),
                ),
              ],
            );
          },
        );
      },
    );

    if (result == null || result.name.trim().isEmpty) {
      return null;
    }

    return result;
  } finally {
    controller.dispose();
  }
}