using AutoMapper;
using Microsoft.EntityFrameworkCore;
using OrdersManagementDataModel.Dtos;
using OrdersManagementDataModel.Entities;

namespace OrdersManagementDataModel.Services;

public class RoleService(OrdersManagementDbContext context, IMapper mapper) : IRoleService
{
    public async Task<IEnumerable<RoleDto>> GetRoles()
    {
        IList<RoleDto> roles = await context.Roles.Select(x => mapper.Map<RoleDto>(x)).ToListAsync();

        return roles;
    }
    
    public async Task<RoleDto?> GetRoleById(Guid id)
    {
        RoleDto? role = await context.Roles.Where(x => x.RowPointer == id)
            .Select(x => mapper.Map<RoleDto>(x)).FirstOrDefaultAsync();
        
        return role;
    }
    
    public async Task<RoleDto?> GetRoleByName(string name)
    {
        RoleDto? role = await context.Roles.Where(x => x.Name == name)
            .Select(x => mapper.Map<RoleDto>(x)).FirstOrDefaultAsync();
        
        return role;
    }
    
    public async Task<int> AddRole(RoleDto roleDto)
    {
        Role role = new Role
        {
            Name = roleDto.Name,
            RowPointer = Guid.NewGuid()
        };
        
        context.Roles.Add(role);
        return await context.SaveChangesAsync();
    }
    
    public async Task<int> DeleteRole(Guid id)
    {
        Role? role = await context.Roles.Where(x => x.RowPointer == id).FirstOrDefaultAsync() ?? null;

        if (role == null) return 0;

        context.Roles.Remove(role);
        return await context.SaveChangesAsync();
    }
}