using NSubstitute;
using Schaad.Accounting.Interfaces;
using Schaad.Accounting.Models;
using Schaad.Accounting.Repositories;
using Shouldly;

namespace Schaad.Accounting.Tests;

public class AccountRepositoryTestShould : IDisposable
{
    private readonly string dbDir;
    private readonly ISettingsService settingsService;
    private readonly AccountRepository sut;

    public AccountRepositoryTestShould()
    {
        dbDir = Path.Combine(Path.GetTempPath(), "AccountingNext-tests-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(dbDir);

        settingsService = Substitute.For<ISettingsService>();
        settingsService.GetDbPath().Returns(dbDir);
        settingsService.GetLastYearDbPath().Returns(Path.Combine(dbDir, "no-such-dir"));

        sut = new AccountRepository(settingsService, new RepositoryCache());
    }

    public void Dispose()
    {
        if (Directory.Exists(dbDir))
        {
            Directory.Delete(dbDir, recursive: true);
        }
    }

    [Fact]
    public void AssignNewIdWhenSavingAccountWithoutId()
    {
        var account = new Account { Number = 1000, Name = "Cash", Currency = "CHF" };

        sut.SaveAccount(account);

        var stored = sut.GetAccountList().Single();
        stored.Id.ShouldNotBeNullOrEmpty();
        stored.Name.ShouldBe("Cash");
    }

    [Fact]
    public void UpdateInPlaceWhenSavingAccountWithExistingId()
    {
        sut.SaveAccount(new Account { Number = 1000, Name = "Cash", Currency = "CHF" });
        var id = sut.GetAccountList().Single().Id;

        sut.SaveAccount(new Account { Id = id, Number = 1000, Name = "Cash renamed", Currency = "CHF" });

        var accounts = sut.GetAccountList();
        accounts.Count.ShouldBe(1);
        accounts[0].Name.ShouldBe("Cash renamed");
    }

    [Fact]
    public void DefaultCurrencyToChfWhenSavingAccountWithoutCurrency()
    {
        sut.SaveAccount(new Account { Number = 1000, Name = "Cash", Currency = null! });

        sut.GetAccountList().Single().Currency.ShouldBe("CHF");
    }

    [Fact]
    public void RemoveAccountWhenDeletingById()
    {
        sut.SaveAccount(new Account { Number = 1000, Name = "Cash", Currency = "CHF" });
        var id = sut.GetAccountList().Single().Id;

        sut.DeleteAccount(id);

        sut.GetAccountList().ShouldBeEmpty();
    }

    [Fact]
    public void ReturnAccountWhenLookingUpByBankAccountNumber()
    {
        sut.SaveAccount(new Account { Number = 1010, Name = "Checking", Currency = "CHF", BankAccountNumber = "CH01" });
        sut.SaveAccount(new Account { Number = 1020, Name = "Savings", Currency = "CHF", BankAccountNumber = "CH02" });

        sut.GetAccountForBankAccountNumber("CH01").Name.ShouldBe("Checking");
        sut.GetAccountForBankAccountNumber("CH02").Name.ShouldBe("Savings");
        sut.GetAccountForBankAccountNumber("CH99").ShouldBeNull();
    }

    [Fact]
    public void UpdateLastBankBalanceWhenSavingBankBalance()
    {
        sut.SaveAccount(new Account { Number = 1010, Name = "Checking", Currency = "CHF", BankAccountNumber = "CH01" });

        sut.SaveBankAccountBalance("CH01", 1234.56m);

        sut.GetAccountForBankAccountNumber("CH01").LastBankBalance.ShouldBe(1234.56m);
    }

    [Fact]
    public void SurviveConstructorReRunWhenAccountsFileAlreadyExists()
    {
        sut.SaveAccount(new Account { Number = 1000, Name = "Cash", Currency = "CHF" });

        // Re-construct with the same directory: existing file, no year rollover, no data loss.
        var fresh = new AccountRepository(settingsService, new RepositoryCache());

        var accounts = fresh.GetAccountList();
        accounts.Count.ShouldBe(1);
        accounts[0].Name.ShouldBe("Cash");
    }
}