// Flutter
import 'package:flutter/material.dart';

// Local
import 'package:flutter_expense_tracker/db.dart';
import 'package:flutter_expense_tracker/models/asset.dart';
import 'package:flutter_expense_tracker/models/expense.dart';
import 'package:flutter_expense_tracker/models/income.dart';
import 'package:flutter_expense_tracker/models/tracked_type_recurring.dart';

/// TODO:
/// - Expenses (total number, totals by day / month / year)
/// - Incomes (total number, totals by day / month / year)
/// - Assets (total number, total by day / month / year)
/// - Projected Assets in:
///     - 1 week, 1 month, 1 quarter, 1 year
///     - 1/2 year? 2 years? 5 years? Allow customization?

class ProjectionPage extends StatefulWidget {
  const ProjectionPage({
    super.key,
  });

  @override
  State<ProjectionPage> createState() => _ProjectionPageState();
}

class _ProjectionPageState extends State<ProjectionPage> {
  @override
  Widget build(BuildContext context) {
    Widget expenseSummary = SummaryCardForTotals(
      list: DatabaseHelper.instance.getExpenses(),
      summaryTypeLabel: "Expense",
    );

    return ListView(
      children: [
        expenseSummary,
        SummaryCard(
          name: "Income Totals",
          leftText: "left",
          middleText: "middle",
          rightText: "right",
        ),
        SummaryCard(
          name: "Asset Totals",
          leftText: "left",
          middleText: "middle",
          rightText: "right",
        ),
      ],
    );
  }
}

class SummaryCardForTotals extends StatelessWidget {
  const SummaryCardForTotals({
    super.key,
    required this.list,
    required this.summaryTypeLabel,
  });

  final Future<List<RecurringTrackedType>> list;
  final String summaryTypeLabel;

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<RecurringTrackedType>>(
        future: list,
        builder: (
          BuildContext context,
          AsyncSnapshot<List<RecurringTrackedType>> snapshot,
        ) {
          if (!snapshot.hasData) {
            return Text('Loading $summaryTypeLabel Section...');
          }
          double dailyTotal = 0, monthlyTotal = 0, yearlyTotal = 0;
          for (RecurringTrackedType e in snapshot.data!) {
            dailyTotal += e.calcComparableAmountDaily();
            monthlyTotal += e.calcComparableAmountYearly() / 12;
            yearlyTotal += e.calcComparableAmountYearly();
          }
          return SummaryCard(
            name: "$summaryTypeLabel Totals",
            leftText: "${dailyTotal.toStringAsFixed(2)} Daily",
            middleText: "${monthlyTotal.toStringAsFixed(2)} Monthly",
            rightText: "${yearlyTotal.toStringAsFixed(2)} Yearly",
          );
        });
  }
}

class SummaryCard extends StatelessWidget {
  const SummaryCard({
    super.key,
    required this.name,
    required this.leftText,
    required this.middleText,
    required this.rightText,
  });

  final String name;
  final String leftText;
  final String middleText;
  final String rightText;

  @override
  Widget build(BuildContext context) {
    return Card(
      child: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          children: [
            Row(
              children: [
                Text(leftText),
                Spacer(),
                Center(
                  child: Column(
                    children: [
                      Text(name),
                      Text(middleText),
                    ],
                  ),
                ),
                Spacer(),
                Text(rightText),
              ],
            ),
          ],
        ),
      ),
    );
  }
}