using Data.SeaHavenIndustries;
using Microsoft.EntityFrameworkCore;
using SeaHaven.DataServices.Interfaces;

namespace SeaHaven.DataServices.Implementation;

public sealed class AccountOwnerDataService : IAccountOwnerDataService
{
    private readonly ApplicationDbContext _context;

    public AccountOwnerDataService(ApplicationDbContext context)
    {
        _context = context;
    }

    public async Task<bool> EnsureConfiguredOwnerAsync(
        string? configuredUserId,
        CancellationToken cancellationToken)
    {
        var ownerId = string.IsNullOrWhiteSpace(configuredUserId)
            ? null
            : configuredUserId.Trim();

        if (ownerId is not null)
        {
            var configuredUserExists = await _context.Users
                .AsNoTracking()
                .AnyAsync(user => user.Id == ownerId, cancellationToken);

            if (!configuredUserExists)
                throw new InvalidOperationException("The configured account owner user was not found.");
        }

        var ownerRows = await _context.Users
            .Where(user => user.IsAccountOwner || (ownerId != null && user.Id == ownerId))
            .ToListAsync(cancellationToken);

        var changed = false;
        foreach (var user in ownerRows)
        {
            var shouldBeOwner = ownerId is not null && user.Id == ownerId;
            if (user.IsAccountOwner != shouldBeOwner)
            {
                user.IsAccountOwner = shouldBeOwner;
                changed = true;
            }
        }

        if (changed)
            await _context.SaveChangesAsync(cancellationToken);

        return changed;
    }
}