using UtopiaCanteen.Shared;
using UtopiaCanteenSystem.Api;
using UtopiaCanteenSystem.Models;

namespace UtopiaCanteenSystem.Services;

/// <summary>
/// Meal schedule CRUD via central backend API (client never touches HRMS/MySQL).
/// </summary>
public sealed class BackendApiMealScheduleService : IMealScheduleService
{
    private readonly ICanteenBackendApiClient _api;

    public BackendApiMealScheduleService(ICanteenBackendApiClient api)
    {
        _api = api;
    }

    public IReadOnlyList<MealSchedule> GetActiveSchedulesForSite(string siteId)
    {
        var all = GetAllSchedulesAsync().GetAwaiter().GetResult();
        if (string.IsNullOrWhiteSpace(siteId))
            return all;
        var site = siteId.Trim().Replace("SITE : ", "", StringComparison.OrdinalIgnoreCase).Trim();
        return all.Where(s => string.Equals(s.LocationSiteId?.Trim(), site, StringComparison.OrdinalIgnoreCase)).ToList();
    }

    public async Task<IReadOnlyList<MealSchedule>> GetAllSchedulesAsync(CancellationToken cancellationToken = default)
    {
        var dtos = await _api.GetMealSchedulesAsync(cancellationToken).ConfigureAwait(false);
        return dtos.Select(ApiDtoMapper.ToMealSchedule).ToList();
    }

    public async Task<long> CreateAsync(MealSchedule schedule, CancellationToken cancellationToken = default)
    {
        var dto = ApiDtoMapper.ToMealScheduleDto(schedule);
        return await _api.CreateMealScheduleAsync(dto, cancellationToken).ConfigureAwait(false);
    }

    public async Task UpdateAsync(MealSchedule schedule, CancellationToken cancellationToken = default)
    {
        var dto = ApiDtoMapper.ToMealScheduleDto(schedule);
        await _api.UpdateMealScheduleAsync(dto, cancellationToken).ConfigureAwait(false);
    }

    public async Task DeleteAsync(long id, CancellationToken cancellationToken = default) =>
        await _api.DeleteMealScheduleAsync(id, cancellationToken).ConfigureAwait(false);
}