using Microsoft.AspNetCore.Mvc;
using ScrapperAPI.Interfaces;
using ScrapperAPI.Utils;

namespace ScrapperAPI.Controllers;

[ApiController]
public sealed class ContentController : ControllerBase
{
    private readonly IContentRepository _content;

    public ContentController(IContentRepository content)
    {
        _content = content;
    }

    // ✅ Retorna HTML DESCOMPRIMIDO
    // GET /queue/{queueId}/content
    [HttpGet("queue/{queueId:int}/content")]
    public async Task<IActionResult> GetDecompressedHtml(int queueId, CancellationToken ct)
    {
        var row = await _content.GetCompressedByQueueIdAsync(queueId, ct);
        if (row is null || row.ContentBytes is null || row.ContentBytes.Length == 0)
            return NotFound(new { message = "Content not found for this queueId." });

        if (!string.Equals(row.ContentEncoding, "gzip", StringComparison.OrdinalIgnoreCase))
            return StatusCode(415, new { message = $"Unsupported encoding: {row.ContentEncoding}" });

        string html;
        try
        {
            html = CompressionUtils.GzipDecompressUtf8(row.ContentBytes);
        }
        catch (Exception ex)
        {
            // Se o payload estiver corrompido/errado
            return StatusCode(500, new { message = "Failed to decompress content.", error = ex.Message });
        }

        // Headers úteis pra debug
        Response.Headers["X-Content-Id"] = row.Id.ToString();
        Response.Headers["X-Queue-Id"] = row.QueueId.ToString();
        Response.Headers["X-Content-Encoding"] = row.ContentEncoding;
        if (row.OriginalLength is not null) Response.Headers["X-Original-Length"] = row.OriginalLength.Value.ToString();
        if (row.CompressedLength is not null) Response.Headers["X-Compressed-Length"] = row.CompressedLength.Value.ToString();

        // Retorna como HTML (o browser / front consegue renderizar se quiser)
        return Content(html, "text/html; charset=utf-8");
    }

    // (Opcional) debug: retorna descomprimido como texto
    // GET /queue/{queueId}/content/raw
    [HttpGet("queue/{queueId:int}/content/raw")]
    public async Task<IActionResult> GetDecompressedRaw(int queueId, CancellationToken ct)
    {
        var row = await _content.GetCompressedByQueueIdAsync(queueId, ct);
        if (row is null || row.ContentBytes is null || row.ContentBytes.Length == 0)
            return NotFound(new { message = "Content not found for this queueId." });

        if (!string.Equals(row.ContentEncoding, "gzip", StringComparison.OrdinalIgnoreCase))
            return StatusCode(415, new { message = $"Unsupported encoding: {row.ContentEncoding}" });

        var text = CompressionUtils.GzipDecompressUtf8(row.ContentBytes);
        return Content(text, "text/plain; charset=utf-8");
    }
}