using line_gestao_api.Data;
using line_gestao_api.Dtos;
using line_gestao_api.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace line_gestao_api.Controllers
{
    [ApiController]
    [Route("api/mureg")]
    public class MuregController : ControllerBase
    {
        private readonly AppDbContext _db;

        public MuregController(AppDbContext db)
        {
            _db = db;
        }

        public class ImportExcelForm
        {
            public IFormFile File { get; set; } = default!;
        }

        // ==========================================================
        // ✅ GET: /api/mureg (com paginação, busca e ordenação)
        // ==========================================================
        [HttpGet]
        public async Task<ActionResult<PagedResult<MuregListDto>>> GetAll(
            [FromQuery] string? search,
            [FromQuery] int page = 1,
            [FromQuery] int pageSize = 10,
            [FromQuery] string? sortBy = "item",
            [FromQuery] string? sortDir = "asc")
        {
            page = page < 1 ? 1 : page;
            pageSize = pageSize < 1 ? 10 : pageSize;

            var q = _db.MuregLines.AsNoTracking();

            if (!string.IsNullOrWhiteSpace(search))
            {
                var s = search.Trim();
                q = q.Where(x =>
                    EF.Functions.ILike((x.LinhaAntiga ?? ""), $"%{s}%") ||
                    EF.Functions.ILike((x.LinhaNova ?? ""), $"%{s}%") ||
                    EF.Functions.ILike((x.ICCID ?? ""), $"%{s}%") ||
                    EF.Functions.ILike((x.Cliente ?? ""), $"%{s}%") ||
                    EF.Functions.ILike(x.Item.ToString(), $"%{s}%"));
            }

            var total = await q.CountAsync();

            var sb = (sortBy ?? "item").Trim().ToLowerInvariant();
            var desc = string.Equals((sortDir ?? "asc").Trim(), "desc", StringComparison.OrdinalIgnoreCase);

            q = sb switch
            {
                "item" => desc ? q.OrderByDescending(x => x.Item) : q.OrderBy(x => x.Item),
                "linhaantiga" => desc ? q.OrderByDescending(x => x.LinhaAntiga ?? "").ThenBy(x => x.Item) : q.OrderBy(x => x.LinhaAntiga ?? "").ThenBy(x => x.Item),
                "linhanova" => desc ? q.OrderByDescending(x => x.LinhaNova ?? "").ThenBy(x => x.Item) : q.OrderBy(x => x.LinhaNova ?? "").ThenBy(x => x.Item),
                "iccid" => desc ? q.OrderByDescending(x => x.ICCID ?? "").ThenBy(x => x.Item) : q.OrderBy(x => x.ICCID ?? "").ThenBy(x => x.Item),
                "datadamureg" => desc ? q.OrderByDescending(x => x.DataDaMureg).ThenBy(x => x.Item) : q.OrderBy(x => x.DataDaMureg).ThenBy(x => x.Item),
                "cliente" => desc ? q.OrderByDescending(x => x.Cliente ?? "").ThenBy(x => x.Item) : q.OrderBy(x => x.Cliente ?? "").ThenBy(x => x.Item),
                _ => desc ? q.OrderByDescending(x => x.Item) : q.OrderBy(x => x.Item)
            };

            var items = await q
                .Skip((page - 1) * pageSize)
                .Take(pageSize)
                .Select(x => new MuregListDto
                {
                    Id = x.Id,
                    Item = x.Item,
                    LinhaAntiga = x.LinhaAntiga,
                    LinhaNova = x.LinhaNova,
                    ICCID = x.ICCID,
                    DataDaMureg = x.DataDaMureg,
                    Cliente = x.Cliente
                })
                .ToListAsync();

            return Ok(new PagedResult<MuregListDto>
            {
                Page = page,
                PageSize = pageSize,
                Total = total,
                Items = items
            });
        }

        // ==========================================================
        // ✅ POST: /api/mureg/import-excel (opcional)
        // Se você usar o botão "Importar" da tela MUREG, ele vai bater aqui
        // ==========================================================
        [HttpPost("import-excel")]
        [Consumes("multipart/form-data")]
        [RequestSizeLimit(50_000_000)]
        public async Task<IActionResult> ImportExcel([FromForm] ImportExcelForm form)
        {
            // Se você quiser manter "importa só no GERAL", pode remover este endpoint.
            // Eu deixei para não quebrar o botão do seu front (que chama /api/mureg/import-excel).
            return BadRequest(new { message = "Importe a planilha pela página GERAL. O MUREG será carregado automaticamente." });
        }
    }
}