using FinancialApi.Application;
using Microsoft.EntityFrameworkCore;

namespace FinancialApi.Infrastructure;

public class ReversalQuery : IReversalQuery
{
    private readonly AccountDbContext _db;

    public ReversalQuery(AccountDbContext db) => _db = db;

    public async Task<ReversalData?> GetReversalDataAsync(Guid journalEntryId)
    {
        var entry = await _db.JournalEntries
            .Include(x => x.Lines)
            .AsNoTracking()
            .FirstOrDefaultAsync(x => x.Id == journalEntryId);

        if (entry == null)
        {
            return null;
        }

        var accountIds = entry.Lines.Select(l => l.AccountId).Distinct().ToList();

        var accounts = await _db.Accounts
            .AsNoTracking()
            .Where(a => accountIds.Contains(a.Id))
            .ToListAsync();

        return new ReversalData(entry, accounts);
    }
}