using ExcelToPdfService.Services;
using Microsoft.AspNetCore.Mvc;

namespace ExcelToPdfService.Controllers;

[ApiController]
[Route("api/[controller]")]
public class ExcelToPdfController : ControllerBase
{
    private readonly IExcelToPdfService _service;

    public ExcelToPdfController(IExcelToPdfService service) => _service = service;

    /// <summary>Upload Excel file → nhận PDF trả về</summary>
    [HttpPost("convert")]
    public async Task<IActionResult> Convert(
        IFormFile file,
        [FromQuery] string? printArea = null,
        [FromQuery] bool landscape = false)
    {
        if (file == null || file.Length == 0)
            return BadRequest(new { success = false, message = "No file uploaded" });

        var ext = Path.GetExtension(file.FileName).ToLowerInvariant();
        if (ext != ".xlsx" && ext != ".xls")
            return BadRequest(new { success = false, message = "Only .xlsx/.xls files are supported" });

        await using var stream = file.OpenReadStream();
        var pdfBytes = await _service.ConvertAsync(stream, printArea, landscape);
        var fileName = Path.GetFileNameWithoutExtension(file.FileName) + ".pdf";

        return File(pdfBytes, "application/pdf", fileName);
    }

    /// <summary>Chuyển đổi file Excel theo đường dẫn trên server</summary>
    [HttpPost("convert-by-path")]
    public async Task<IActionResult> ConvertByPath([FromBody] ConvertByPathRequest req)
    {
        if (string.IsNullOrWhiteSpace(req.FilePath))
            return BadRequest(new { success = false, message = "FilePath is required" });

        try
        {
            var pdfBytes = await _service.ConvertFileAsync(req.FilePath, req.PrintArea, req.Landscape);
            var fileName = Path.GetFileNameWithoutExtension(req.FilePath) + ".pdf";
            return File(pdfBytes, "application/pdf", fileName);
        }
        catch (FileNotFoundException)
        {
            return NotFound(new { success = false, message = $"File not found: {req.FilePath}" });
        }
        catch (Exception ex)
        {
            return StatusCode(500, new { success = false, message = ex.Message });
        }
    }

    /// <summary>Health check</summary>
    [HttpGet("health")]
    public IActionResult Health() => Ok(new { status = "ok", version = "1.0.0", time = DateTime.UtcNow });
}

public record ConvertByPathRequest(string FilePath, string? PrintArea = null, bool Landscape = false);