using AutoMapper;
using Microsoft.EntityFrameworkCore;
using OrdersManagementDataModel.Dtos;
using OrdersManagementDataModel.Queries;
using TaskScheduler = OrdersManagementDataModel.Entities.TaskScheduler;

namespace OrdersManagementDataModel.Services;

public class TaskSchedulerService(OrdersManagementDbContext context, IMapper mapper) : ITaskSchedulerService
{
    public async Task<IEnumerable<TaskSchedulerDto>> GetTaskSchedulers()
    {
        List<TaskSchedulerDto> taskSchedulers =
            (await Task.FromResult(OrdersManagementQueries.GetSchedulers(context))).ToList();

        return taskSchedulers;
    }
    
    public async Task<TaskSchedulerDto?> GetTaskSchedulerById(Guid id)
    {
        TaskSchedulerDto? taskScheduler = await context.TaskSchedulers.Where(x => x.RowPointer == id)
            .Select(x => mapper.Map<TaskSchedulerDto>(x)).FirstOrDefaultAsync();
        return taskScheduler;
    }

    public async Task<TaskSchedulerDto?> GetTaskSchedulerByTaskName(string taskName)
    {
        TaskSchedulerDto? taskScheduler = await context.TaskSchedulers.Where(x => x.Name == taskName)
            .Select(x => mapper.Map<TaskSchedulerDto>(x)).FirstOrDefaultAsync();
        return taskScheduler;
    }

    public async Task<int> AddTaskScheduler(TaskSchedulerDto taskSchedulerDto)
    {
        TaskScheduler taskScheduler = mapper.Map<TaskScheduler>(taskSchedulerDto);
        context.TaskSchedulers.Add(taskScheduler);
        return await context.SaveChangesAsync();
    }
    
    public async Task<int> UpdateTaskScheduler(TaskSchedulerDto taskSchedulerDto)
    {
        TaskScheduler taskScheduler = mapper.Map<TaskScheduler>(taskSchedulerDto);
        context.TaskSchedulers.Update(taskScheduler);
        return await context.SaveChangesAsync();
    }

    public async Task<int> DeleteTaskScheduler(Guid id)
    {
        TaskScheduler? taskScheduler =
            await context.TaskSchedulers.Where(x => x.RowPointer == id).FirstOrDefaultAsync() ?? null;

        if (taskScheduler == null) return 0;

        context.TaskSchedulers.Remove(taskScheduler);
        return await context.SaveChangesAsync();
    }
}