using System.Text;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.DependencyInjection;
using MoonlightServers.Shared.Admin.Templates;
using VYaml.Serialization;

namespace MoonlightServers.Api.Admin.Templates;

[ApiController]
[Route("api/admin/servers/templates")]
public class TransferController : Controller
{
    private readonly TemplateTransferService TransferService;

    public TransferController(TemplateTransferService transferService)
    {
        TransferService = transferService;
    }

    [HttpGet("{id:int}/export")]
    public async Task<ActionResult> ExportAsync([FromRoute] int id)
    {
        var transferModel = await TransferService.ExportAsync(id);

        if (transferModel == null)
            return Problem("No template with that id found", statusCode: 404);

        var yml = YamlSerializer.Serialize(transferModel, new YamlSerializerOptions
        {
            Resolver = CompositeResolver.Create([
                GeneratedResolver.Instance,
                StandardResolver.Instance
            ])
        });

        return File(yml.ToArray(), "text/yaml", $"{transferModel.Name}.yml");
    }

    [HttpPost("import")]
    public async Task<ActionResult<TemplateDto>> ImportAsync()
    {
        string content;

        await using (Stream receiveStream = Request.Body)
            
        using (StreamReader readStream = new StreamReader(receiveStream))
            content = await readStream.ReadToEndAsync();
        
        if(content.Contains("version: PLCN_v3"))
        {
            var importService = HttpContext.RequestServices.GetRequiredService<PelicanEggImportService>();

            var template = await importService.ImportAsync(content);

            return TemplateMapper.ToDto(template);
        }
        if (
            content.Contains("PTDL_v2", StringComparison.OrdinalIgnoreCase) ||
            content.Contains("PLCN_v1", StringComparison.OrdinalIgnoreCase) ||
            content.Contains("PLCN_v2", StringComparison.OrdinalIgnoreCase) ||
            content.Contains("PLCN_v3", StringComparison.OrdinalIgnoreCase)
        )
        {
            var importService = HttpContext.RequestServices.GetRequiredService<PterodactylEggImportService>();

            var template = await importService.ImportAsync(content);

            return TemplateMapper.ToDto(template);
        }
        else
        {
            var transferModel = YamlSerializer.Deserialize<TemplateTransferModel>(
                Encoding.UTF8.GetBytes(content),
                new YamlSerializerOptions
                {
                    Resolver = CompositeResolver.Create([
                        GeneratedResolver.Instance,
                        StandardResolver.Instance
                    ])
                }
            );

            var template = await TransferService.ImportAsync(transferModel);

            return TemplateMapper.ToDto(template);
        }
    }
}