using Core.Interfaces;
using Domain.Dtos.Stock;
using Domain.Entities;
using Domain.Generics;
using Microsoft.AspNetCore.Mvc;

namespace API.Controllers.Stock
{
    [Route("api/[controller]")]
    [ApiController]
    public class LSProductController : ControllerBase
    {
        private readonly ILSProductDom _service;

        public LSProductController(ILSProductDom service)
        {
            _service = service;
        }

        [HttpPost("search")]
        public async Task<ActionResult<PagedResult<ELSProduct>>> Search([FromBody] LSProductSearchParams searchParams)
        {
            var result = await _service.SearchAsync(searchParams);
            return Ok(result);
        }

        [HttpGet("{id}")]
        public async Task<ActionResult<ELSProduct>> GetById(int id)
        {
            var product = await _service.GetByIdAsync(id);
            if (product == null)
                return NotFound($"No se encontró el producto con ID {id}.");
            return Ok(product);
        }

        [HttpPost("create")]
        public async Task<ActionResult<ELSProduct>> Create([FromBody] ELSProduct model)
        {
            var created = await _service.CreateAsync(model);
            return CreatedAtAction(nameof(GetById), new { id = created.Id }, created);
        }

        [HttpPut("update")]
        public async Task<IActionResult> Update([FromBody] ELSProduct model)
        {
            var success = await _service.UpdateAsync(model);
            if (!success)
                return NotFound("No se pudo actualizar el producto.");
            return Ok();
        }

        [HttpDelete("{id}")]
        public async Task<IActionResult> Delete(int id)
        {
            var success = await _service.DeleteAsync(id);
            if (!success)
                return NotFound("No se pudo eliminar el producto.");
            return Ok();
        }

        [HttpPost("exportfiltered")]
        public async Task<IActionResult> ExportFiltered([FromBody] LSProductSearchParams searchParams)
        {
            var content = await _service.ExportToExcelAsync(searchParams);
            var fileName = $"productos_{DateTime.Now:yyyyMMddHHmm}.xlsx";
            return File(content, "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", fileName);
        }
        
        [HttpGet("download-template")]
        public IActionResult DownloadImportTemplate()
        {
            var file = _service.GetImportTemplate();
            return File(file,
                "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
                "plantilla_productos.xlsx");
        }
        [HttpPost("preview-import")]
        public ActionResult<List<ProductImportPreviewDto>> PreviewImport([FromForm] ProductImportFormDto dto)
        {
            using var ms = new MemoryStream();
            dto.File.CopyTo(ms);
            var fileBytes = ms.ToArray();

            var preview = _service.PreviewImportFromExcel(fileBytes);
            return Ok(preview);
        }
        public class ProductImportFormDto
        {
            public IFormFile File { get; set; } = default!;
        }
        /// <summary>
        /// Importa productos desde la vista previa. Espera una lista de ProductImportPreviewDto SIN errores.
        /// </summary>
        [HttpPost("import")]
        public async Task<ActionResult<ProductImportResultDto>> ImportProducts([FromBody] List<ProductImportPreviewDto> items)
        {
            if (items == null || !items.Any())
                return BadRequest("No se enviaron productos para importar.");

            // Opcional: validación de errores
            if (items.Any(x => x.HasError))
                return BadRequest("Hay productos con errores. Corríjalos antes de importar.");

            var result = await _service.ImportProductsAsync(items);
            return Ok(result);
        }

    }
}