import 'dart:typed_data';

import 'package:alert_dialog/alert_dialog.dart';
import 'package:confirm_dialog/confirm_dialog.dart';
import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:flutter_pdfview/flutter_pdfview.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:logging/logging.dart';
import 'package:moneymgr_mobile/services/storage/expenses.dart';
import 'package:moneymgr_mobile/services/storage/prefs.dart';
import 'package:moneymgr_mobile/utils/extensions.dart';
import 'package:moneymgr_mobile/utils/time_utils.dart';

class ExpenseEditor extends HookConsumerWidget {
  final Uint8List file;
  final Function(BaseExpenseInfo) onFinished;
  final Function()? onRescan;

  const ExpenseEditor({
    super.key,
    required this.file,
    required this.onFinished,
    required this.onRescan,
  });

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final serverConfig = ref.watch(prefsProvider).requireValue.serverConfig()!;

    final labelController = useTextEditingController();
    final costController = useTextEditingController();
    final timeController = useState(DateTime.now());

    // Pick a new date
    handlePickDate() async {
      final date = await showDatePicker(
        context: context,
        firstDate: DateTime(2000),
        lastDate: DateTime(2099),
        initialDate: timeController.value,
      );
      if (date != null) timeController.value = date;
    }

    // Save expense
    handleSubmit() async {
      if (costController.text.isEmpty) {
        context.showTextSnackBar("Please specify expense cost!");
        return;
      }

      onFinished(
        BaseExpenseInfo(
          label: labelController.text,
          cost: int.tryParse(costController.text) ?? 0,
          time: timeController.value,
        ),
      );
    }

    // Cancel operation
    handleRescan() async {
      if (await confirm(
            context,
            content: Text("Do you really want to discard this expense?"),
          ) &&
          onRescan != null) {
        onRescan!();
      }
    }

    return Scaffold(
      appBar: AppBar(
        title: Text("Expense info"),
        actions: [
          // Rescan expense
          IconButton(
            onPressed: onRescan == null ? null : handleRescan,
            icon: Icon(Icons.restart_alt),
          ),

          // Submit
          IconButton(onPressed: handleSubmit, icon: Icon(Icons.save)),
        ],
      ),
      body: Column(
        children: [
          // Expense preview
          Expanded(
            child: PDFView(
              pdfData: file,
              onError: (e) {
                Logger.root.warning("Failed to render PDF $e");
                alert(context, content: Text("Failed to render PDF $e"));
              },
              fitPolicy: FitPolicy.BOTH,
            ),
          ),

          SizedBox(height: 10),

          // Cost
          TextField(
            controller: costController,
            keyboardType: TextInputType.number,
            decoration: const InputDecoration(labelText: 'Cost'),
            textInputAction: TextInputAction.done,
          ),

          SizedBox(height: 10),

          // Date
          TextField(
            enabled: true,
            readOnly: true,
            controller: TextEditingController(
              text: timeController.value.simpleDate,
            ),
            keyboardType: TextInputType.datetime,
            decoration: InputDecoration(
              labelText: 'Date',
              suffixIcon: IconButton(
                onPressed: handlePickDate,
                icon: const Icon(Icons.date_range),
              ),
            ),
          ),

          SizedBox(height: 10),

          // Label
          TextField(
            controller: labelController,
            keyboardType: TextInputType.text,
            decoration: const InputDecoration(labelText: 'Label'),
            textInputAction: TextInputAction.done,
            maxLength: serverConfig.constraints.inbox_entry_label.max,
          ),
        ],
      ),
    );
  }
}