import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:helpers/helpers.dart';
import 'package:rluv/features/budget/screens/transactions_listview.dart';
import 'package:rluv/features/budget/widgets/add_transaction_dialog.dart';
import 'package:rluv/features/budget/widgets/budget_category_bar.dart';
import 'package:rluv/features/budget/widgets/budget_net_bar.dart';
import 'package:rluv/global/styles.dart';
import 'package:rluv/global/utils.dart';

import '../../../global/store.dart';
import '../../../global/widgets/ui_button.dart';
import '../../../models/transaction_model.dart';
import '../widgets/add_budget_category_dialog.dart';

class BudgetOverviewScreen extends ConsumerStatefulWidget {
  const BudgetOverviewScreen({super.key, required this.initialData});

  final Map<String, dynamic> initialData;

  @override
  ConsumerState<BudgetOverviewScreen> createState() =>
      _BudgetOverviewScreenState();
}

class _BudgetOverviewScreenState extends ConsumerState<BudgetOverviewScreen> {
  final budgetListScrollController = ScrollController();
  @override
  Widget build(BuildContext context) {
    final budget = ref.watch(budgetProvider);
    final budgetCategories = ref.watch(budgetCategoriesProvider);
    final transactions = ref.watch(transactionsProvider);
    final screen = BuildMedia(context).size;
    double netExpense = 0.0;
    double netIncome = 0.0;
    double expectedExpenses = 0.0;
    Map<int, double> budgetCategoryNetMap = {};
    netExpense = transactions
        .where((t) => t.type == TransactionType.expense)
        .fold(netExpense, (net, t) => net + t.amount);
    netIncome = transactions
        .where((t) => t.type == TransactionType.income)
        .fold(netIncome, (net, t) => net + t.amount);
    for (final bud in budgetCategories) {
      double net = 0.0;
      expectedExpenses += bud.amount;
      net = transactions
          .where((t) => t.budgetCategoryId == bud.id)
          .fold(net, (net, t) => net + t.amount);
      budgetCategoryNetMap[bud.id!] = net;
    }
    return Stack(
      children: [
        Column(
          children: [
            /// TOP HALF, TITLE & OVERVIEW
            Container(
              height: screen.height * 0.3,
              width: screen.width,
              color: Styles.purpleNurple,
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.center,
                children: [
                  const Spacer(flex: 2),
                  Text(
                    formatDate(DateTime.now()),
                    style: const TextStyle(
                        fontSize: 16, color: Styles.electricBlue),
                  ),
                  const Spacer(),
                  const Text('MONTHLY',
                      style:
                          TextStyle(fontSize: 42, color: Styles.electricBlue)),
                  const Spacer(flex: 2),
                  BudgetNetBar(
                      isPositive: true,
                      net: netIncome,
                      expected: budget?.expectedIncome ?? 0.0),
                  const Spacer(),
                  BudgetNetBar(
                      isPositive: false,
                      net: netExpense,
                      expected: expectedExpenses),
                  const Spacer(),
                ],
              ),
            ),

            /// BOTTOM HALF, BUDGET BREAKDOWN
            Expanded(
              child: Container(
                color: Styles.sunflower,
                width: screen.width,
                child: Column(
                  mainAxisSize: MainAxisSize.max,
                  children: [
                    Padding(
                      padding: const EdgeInsets.all(14.0),
                      child: Container(
                        decoration: BoxDecoration(
                          color: Styles.blushingPink,
                          borderRadius: BorderRadius.circular(16.0),
                        ),
                        child: Column(
                          children: [
                            const Padding(
                              padding: EdgeInsets.all(8.0),
                              child: Text(
                                'BUDGET',
                                style: TextStyle(
                                    fontSize: 28, color: Styles.electricBlue),
                              ),
                            ),
                            budgetCategories.isEmpty
                                ? Padding(
                                    padding: const EdgeInsets.all(8.0),
                                    child: SizedBox(
                                      width: screen.width * 0.8,
                                      child: Column(
                                        children: [
                                          const Padding(
                                            padding: EdgeInsets.all(8.0),
                                            child: Text(
                                                'No budget categories created yet, add some!'),
                                          ),
                                          UiButton(
                                            onPressed:
                                                ref.watch(budgetProvider) ==
                                                        null
                                                    ? null
                                                    : () => showDialog(
                                                          context: context,
                                                          builder: (context) => Dialog(
                                                              shape: Styles
                                                                  .dialogShape,
                                                              backgroundColor:
                                                                  Styles
                                                                      .dialogColor,
                                                              child:
                                                                  const BudgetCategoryDialog()),
                                                        ),
                                            text: 'Add Category',
                                          ),
                                        ],
                                      ),
                                    ),
                                  )
                                : Padding(
                                    padding: const EdgeInsets.symmetric(
                                        horizontal: 2.0, vertical: 4.0),
                                    child: SizedBox(
                                      height: screen.height * 0.36,
                                      child: Scrollbar(
                                        controller: budgetListScrollController,
                                        thumbVisibility: true,
                                        child: ListView(
                                          physics:
                                              const BouncingScrollPhysics(),
                                          controller:
                                              budgetListScrollController,
                                          shrinkWrap: true,
                                          children: [
                                            ...budgetCategories
                                                .mapIndexed((i, category) {
                                              return BudgetCategoryBar(
                                                budgetCategory: category,
                                                currentAmount:
                                                    budgetCategoryNetMap[
                                                        category.id]!,
                                                index: i,
                                              );
                                            }).toList(),
                                            const SizedBox(height: 20),
                                            Row(
                                              mainAxisAlignment:
                                                  MainAxisAlignment.center,
                                              children: [
                                                SizedBox(
                                                  width: 140,
                                                  child: ElevatedButton(
                                                    onPressed: ref.watch(
                                                                budgetProvider) ==
                                                            null
                                                        ? null
                                                        : () => showDialog(
                                                              context: context,
                                                              builder: (context) => Dialog(
                                                                  shape: Styles
                                                                      .dialogShape,
                                                                  backgroundColor:
                                                                      Styles
                                                                          .dialogColor,
                                                                  child:
                                                                      const BudgetCategoryDialog()),
                                                            ),
                                                    child: const Text(
                                                        'Add Category'),
                                                  ),
                                                ),
                                              ],
                                            ),
                                            const SizedBox(height: 20),
                                          ],
                                        ),
                                      ),
                                    ),
                                  ),
                          ],
                        ),
                      ),
                    ),
                    const Spacer(),
                    Row(
                      children: [
                        Expanded(
                          child: Padding(
                            padding:
                                const EdgeInsets.only(left: 20.0, right: 15.0),
                            child: Container(
                              height: 70,
                              decoration: BoxDecoration(
                                color: Styles.seaweedGreen,
                                borderRadius: BorderRadius.circular(15.0),
                              ),
                              child: InkWell(
                                child: const Center(
                                  child: Padding(
                                    padding: EdgeInsets.symmetric(
                                        horizontal: 20.0, vertical: 14.0),
                                    child: FittedBox(
                                      child: Text(
                                        'Transaction History',
                                        textAlign: TextAlign.center,
                                        style: TextStyle(fontSize: 25),
                                      ),
                                    ),
                                  ),
                                ),
                                onTap: () {
                                  Navigator.push(
                                      context,
                                      MaterialPageRoute(
                                          builder: (context) =>
                                              const TransactionsListview()));
                                },
                              ),
                            ),
                          ),
                        ),
                        Padding(
                          padding: const EdgeInsets.only(right: 20.0),
                          child: Container(
                            decoration: BoxDecoration(
                              color: Styles.purpleNurple,
                              borderRadius: BorderRadius.circular(40.0),
                            ),
                            height: 80,
                            width: 80,
                            child: IconButton(
                              icon: const Icon(
                                Icons.add,
                                size: 48,
                                color: Styles.lavender,
                              ),
                              onPressed: () {
                                showDialog(
                                  context: context,
                                  builder: (BuildContext context) {
                                    return Dialog(
                                        backgroundColor: Styles.dialogColor,
                                        shape: Styles.dialogShape,
                                        child: const TransactionDialog());
                                  },
                                );
                              },
                            ),
                          ),
                        ),
                      ],
                    ),
                    const Spacer(),
                  ],
                ),
              ),
            )
          ],
        ),
        Align(
          alignment: Alignment.topRight,
          child: Padding(
            padding: const EdgeInsets.only(top: 5.0, right: 5.0),
            child: IconButton(
              icon: const Icon(Icons.loop),
              color: Styles.seaweedGreen,
              onPressed: () =>
                  ref.read(dashboardProvider.notifier).fetchDashboard(),
            ),
          ),
        ),
        IgnorePointer(
          child: AnimatedOpacity(
            duration: const Duration(milliseconds: 150),
            opacity: ref.watch(loadingStateProvider) ? 0.75 : 0.0,
            child: Container(
              color: Colors.black12,
              height: screen.height,
              width: screen.width,
              child: const Center(
                child: CircularProgressIndicator(
                  color: Styles.lavender,
                  strokeWidth: 2.5,
                ),
              ),
            ),
          ),
        )
      ],
    );
  }
}