using MediatR;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Mirea.Api.DataAccess.Application.Cqrs.Faculty.Queries.GetFacultyDetails;
using Mirea.Api.DataAccess.Application.Cqrs.Faculty.Queries.GetFacultyList;
using Mirea.Api.Dto.Responses;
using Mirea.Api.Endpoint.Common.Attributes;
using Swashbuckle.AspNetCore.Annotations;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Mirea.Api.Endpoint.Controllers.V1
{
    public class FacultyController(IMediator mediator) : BaseControllerV1
    {
        /// <summary>
        /// Gets a paginated list of faculties.
        /// </summary>
        /// <param name="page">Page number. Start from 0.</param>
        /// <param name="pageSize">Number of items per page.</param>
        /// <returns>Paginated list of faculties.</returns>
        [HttpGet]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [BadRequestResponse]
        public async Task<ActionResult<List<FacultyResponse>>> Get(
            [SwaggerDefault("0")][SwaggerSchema(Nullable = true)][FromQuery] int? page,
            [SwaggerDefault("25")][SwaggerSchema(Nullable = true)][FromQuery] int? pageSize)
        {
            var result = await mediator.Send(new GetFacultyListQuery()
            {
                Page = page,
                PageSize = pageSize
            });

            return Ok(result.Faculties
                .Select(f => new FacultyResponse()
                {
                    Id = f.Id,
                    Name = f.Name,
                    CampusId = f.CampusId
                })
            );
        }

        /// <summary>
        /// Gets details of a specific faculty by ID.
        /// </summary>
        /// <param name="id">Faculty ID.</param>
        /// <returns>Details of the specified faculty.</returns>
        [HttpGet("{id:int}")]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [BadRequestResponse]
        [NotFoundResponse]
        public async Task<ActionResult<FacultyDetailsResponse>> GetDetails(
            [SwaggerDefault("1")] int id)
        {
            var result = await mediator.Send(new GetFacultyInfoQuery()
            {
                Id = id
            });

            return Ok(new FacultyDetailsResponse()
            {
                Id = result.Id,
                Name = result.Name,
                CampusId = result.CampusId,
                CampusCode = result.CampusCode,
                CampusName = result.CampusName
            });
        }
    }
}