use std::{collections::HashSet,io::{Read,Seek},path::PathBuf};
use clap::{Args,Parser,Subcommand};
use anyhow::Result as AResult;
use rbx_dom_weak::Instance;

#[derive(Parser)]
#[command(author, version, about, long_about = None)]
#[command(propagate_version = true)]
struct Cli {
	#[command(subcommand)]
	command: Commands,
}

#[derive(Subcommand)]
enum Commands {
	RobloxToSNF(RobloxToSNFSubcommand),
	DownloadTextures(DownloadTexturesSubcommand),
	ExtractTextures(ExtractTexturesSubcommand),
	ConvertTextures(ConvertTexturesSubcommand),
	VPKContents(VPKContentsSubcommand),
	BSPContents(BSPContentsSubcommand),
	DownloadMeshes(DownloadMeshesSubcommand),
	WriteAttributes(WriteAttributesSubcommand),
}

#[derive(Args)]
struct RobloxToSNFSubcommand {
	#[arg(long)]
	output_folder:PathBuf,
	#[arg(required=true)]
	input_files:Vec<PathBuf>,
}
#[derive(Args)]
struct DownloadTexturesSubcommand {
	#[arg(long,required=true)]
	roblox_files:Vec<PathBuf>
}
#[derive(Args)]
struct ExtractTexturesSubcommand {
	#[arg(long)]
	bsp_file:PathBuf,
	#[arg(long)]
	vpk_dir_files:Vec<PathBuf>
}
#[derive(Args)]
struct ConvertTexturesSubcommand {
}
#[derive(Args)]
struct VPKContentsSubcommand {
	#[arg(long)]
	input_file:PathBuf,
}
#[derive(Args)]
struct BSPContentsSubcommand {
	#[arg(long)]
	input_file:PathBuf,
}
#[derive(Args)]
struct DownloadMeshesSubcommand {
	#[arg(long,required=true)]
	roblox_files:Vec<PathBuf>
}
#[derive(Args)]
struct WriteAttributesSubcommand {
}

fn main() -> AResult<()> {
	let cli = Cli::parse();
	match cli.command {
		Commands::RobloxToSNF(subcommand)=>convert_to_snf(subcommand.input_files,subcommand.output_folder),
		Commands::DownloadTextures(subcommand)=>download_textures(subcommand.roblox_files),
		Commands::ExtractTextures(subcommand)=>extract_textures(vec![subcommand.bsp_file],subcommand.vpk_dir_files),
		Commands::VPKContents(subcommand)=>vpk_contents(subcommand.input_file),
		Commands::BSPContents(subcommand)=>bsp_contents(subcommand.input_file),
		Commands::ConvertTextures(_subcommand)=>convert_textures(),
		Commands::DownloadMeshes(subcommand)=>download_meshes(subcommand.roblox_files),
		Commands::WriteAttributes(_subcommand)=>write_attributes(),
	}
}

fn recursive_collect_regex(objects: &mut std::vec::Vec<rbx_dom_weak::types::Ref>,dom: &rbx_dom_weak::WeakDom, instance: &rbx_dom_weak::Instance, regex: &lazy_regex::Lazy<lazy_regex::Regex>){
	for &referent in instance.children() {
		if let Some(c) = dom.get_by_ref(referent) {
			if regex.captures(c.name.as_str()).is_some(){
				objects.push(c.referent());//copy ref
			}
			recursive_collect_regex(objects,dom,c,regex);
		}
	}
}

fn get_button_refs(dom:&rbx_dom_weak::WeakDom) -> Vec<rbx_dom_weak::types::Ref>{
	let mut buttons = std::vec::Vec::new();
	recursive_collect_regex(&mut buttons, dom, dom.root(),lazy_regex::regex!(r"Button(\d+)$"));
	buttons
}

enum ReaderType<'a, R:Read+Seek>{
	GZip(flate2::read::GzDecoder<&'a mut R>),
	Raw(&'a mut R),
}

fn maybe_gzip_decode<R:Read+Seek>(input:&mut R)->AResult<ReaderType<R>>{
	let mut first_2=[0u8;2];
	if let (Ok(()),Ok(()))=(std::io::Read::read_exact(input, &mut first_2),std::io::Seek::rewind(input)){
		match &first_2{
			b"\x1f\x8b"=>Ok(ReaderType::GZip(flate2::read::GzDecoder::new(input))),
			_=>Ok(ReaderType::Raw(input)),
		}
	}else{
		Err(anyhow::Error::msg("failed to peek"))
	}
}

fn load_dom<R:Read+Seek>(input:&mut R)->AResult<rbx_dom_weak::WeakDom>{
	let mut first_8=[0u8;8];
	if let (Ok(()),Ok(()))=(std::io::Read::read_exact(input, &mut first_8),std::io::Seek::rewind(input)){
		match &first_8[0..4]{
			b"<rob"=>{
				match &first_8[4..8]{
					b"lox!"=>rbx_binary::from_reader(input).map_err(anyhow::Error::msg),
					b"lox "=>rbx_xml::from_reader(input,rbx_xml::DecodeOptions::default()).map_err(anyhow::Error::msg),
					other=>Err(anyhow::Error::msg(format!("Unknown Roblox file type {:?}",other))),
				}
			},
			_=>Err(anyhow::Error::msg("unsupported file type")),
		}
	}else{
		Err(anyhow::Error::msg("peek failed"))
	}
}

fn get_dom<R:Read+Seek>(input:&mut R)->AResult<rbx_dom_weak::WeakDom>{
	match maybe_gzip_decode(input){
		Ok(ReaderType::GZip(mut readable)) => {
			//gzip
			let mut extracted:Vec<u8>=Vec::new();
			readable.read_to_end(&mut extracted)?;
			Ok(load_dom(&mut std::io::Cursor::new(extracted))?)
		},
		Ok(ReaderType::Raw(readable)) => Ok(load_dom(readable)?),
		Err(e) => Err(e)?,
	}
}

struct RobloxAssetId(u64);
struct RobloxAssetIdParseErr;
impl std::str::FromStr for RobloxAssetId {
	type Err=RobloxAssetIdParseErr;
	fn from_str(s: &str) -> Result<Self, Self::Err>{
		let regman=lazy_regex::regex!(r"(\d+)$");
		if let Some(captures) = regman.captures(s) {
			if captures.len()==2{//captures[0] is all captures concatenated, and then each individual capture
				if let Ok(id) = captures[0].parse::<u64>() {
					return Ok(Self(id));
				}
			}
		}
		Err(RobloxAssetIdParseErr)
	}
}
/* The ones I'm interested in:
Beam.Texture
Decal.Texture
FileMesh.MeshId
FileMesh.TextureId
MaterialVariant.ColorMap
MaterialVariant.MetalnessMap
MaterialVariant.NormalMap
MaterialVariant.RoughnessMap
MeshPart.MeshId
MeshPart.TextureID
ParticleEmitter.Texture
Sky.MoonTextureId
Sky.SkyboxBk
Sky.SkyboxDn
Sky.SkyboxFt
Sky.SkyboxLf
Sky.SkyboxRt
Sky.SkyboxUp
Sky.SunTextureId
SurfaceAppearance.ColorMap
SurfaceAppearance.MetalnessMap
SurfaceAppearance.NormalMap
SurfaceAppearance.RoughnessMap
SurfaceAppearance.TexturePack
*/
fn accumulate_content_id(content_list:&mut HashSet<u64>,object:&Instance,property:&str){
	if let Some(rbx_dom_weak::types::Variant::Content(content))=object.properties.get(property){
		if let Ok(asset_id)=AsRef::<str>::as_ref(content).parse::<RobloxAssetId>(){
			content_list.insert(asset_id.0);
		}else{
			println!("Content failed to parse into AssetID: {:?}",content);
		}
	}else{
		println!("property={} does not exist for class={}",object.class.as_str(),property);
	}
}
fn download_textures(paths:Vec<PathBuf>)->AResult<()>{
	println!("Reading files, this could take a hot minute...");
	let mut texture_list=HashSet::new();
	for path in paths{
		let file=match std::fs::File::open(path.as_path()){
			Ok(file)=>file,
			Err(e)=>{
				println!("file error {e}");
				continue;
			}
		};
		let mut input=std::io::BufReader::new(file);
		match get_dom(&mut input){
			Ok(dom)=>{
				for object in dom.into_raw().1.into_values(){
					match object.class.as_str(){
						"Beam"=>accumulate_content_id(&mut texture_list,&object,"Texture"),
						"Decal"=>accumulate_content_id(&mut texture_list,&object,"Texture"),
						"Texture"=>accumulate_content_id(&mut texture_list,&object,"Texture"),
						"FileMesh"=>accumulate_content_id(&mut texture_list,&object,"TextureId"),
						"MeshPart"=>accumulate_content_id(&mut texture_list,&object,"TextureID"),
						"ParticleEmitter"=>accumulate_content_id(&mut texture_list,&object,"Texture"),
						"Sky"=>{
							accumulate_content_id(&mut texture_list,&object,"MoonTextureId");
							accumulate_content_id(&mut texture_list,&object,"SkyboxBk");
							accumulate_content_id(&mut texture_list,&object,"SkyboxDn");
							accumulate_content_id(&mut texture_list,&object,"SkyboxFt");
							accumulate_content_id(&mut texture_list,&object,"SkyboxLf");
							accumulate_content_id(&mut texture_list,&object,"SkyboxRt");
							accumulate_content_id(&mut texture_list,&object,"SkyboxUp");
							accumulate_content_id(&mut texture_list,&object,"SunTextureId");
						},
						_=>(),
					}
				}
			},
			Err(e)=>println!("error loading map {:?}: {:?}",path.file_name(),e),
		}
	}
	let texture_list_string=texture_list.into_iter().map(|id|id.to_string()).collect::<Vec<String>>();
	println!("Texture list:{:?}",texture_list_string.join(" "));
	let output=std::process::Command::new("asset-tool")
	.args(["download","environment","RBXCOOKIE","textures/unprocessed/"])
	.args(texture_list_string)
	.spawn()?
	.wait_with_output()?;
	println!("Asset tool exit_success:{}",output.status.success());
	Ok(())
}
fn download_meshes(paths:Vec<PathBuf>)->AResult<()>{
	println!("Reading files, this could take a hot minute...");
	let mut mesh_list=HashSet::new();
	for path in paths{
		let file=match std::fs::File::open(path.as_path()){
			Ok(file)=>file,
			Err(e)=>{
				println!("file error {e}");
				continue;
			}
		};
		let mut input=std::io::BufReader::new(file);
		match get_dom(&mut input){
			Ok(dom)=>{
				for object in dom.into_raw().1.into_values(){
					match object.class.as_str(){
						"MeshPart"=>accumulate_content_id(&mut mesh_list,&object,"MeshId"),
						"SpecialMesh"=>accumulate_content_id(&mut mesh_list,&object,"MeshId"),
						_=>(),
					}
				}
			},
			Err(e)=>println!("error loading map {:?}: {:?}",path.file_name(),e),
		}
	}
	let mesh_list_string=mesh_list.into_iter().map(|id|id.to_string()).collect::<Vec<String>>();
	println!("Mesh list:{:?}",mesh_list_string.join(" "));
	let output=std::process::Command::new("asset-tool")
	.args(["download","environment","RBXCOOKIE","meshes/"])
	.args(mesh_list_string)
	.spawn()?
	.wait_with_output()?;
	println!("Asset tool exit_success:{}",output.status.success());
	Ok(())
}

fn load_image<R:Read+Seek+std::io::BufRead>(input:&mut R)->AResult<image::DynamicImage>{
	let mut fourcc=[0u8;4];
	input.read_exact(&mut fourcc)?;
	input.rewind()?;
	match &fourcc{
		b"\x89PNG"=>Ok(image::load(input,image::ImageFormat::Png)?),
		b"\xFF\xD8\xFF\xE0"=>Ok(image::load(input,image::ImageFormat::Jpeg)?),//JFIF
		b"<rob"=>Err(anyhow::Error::msg("Roblox xml garbage is not supported yet")),
		other=>Err(anyhow::Error::msg(format!("Unknown texture format {:?}",other))),
	}
}

fn convert(file_thing:std::fs::DirEntry) -> AResult<()>{
	let mut input = std::io::BufReader::new(std::fs::File::open(file_thing.path())?);

	let mut extracted_input=None;
	let image=match maybe_gzip_decode(&mut input){
		Ok(ReaderType::GZip(mut readable)) => {
			//gzip
			let mut extracted:Vec<u8>=Vec::new();
			//read the entire thing to the end so that I can clone the data and write a png to processed images
			readable.read_to_end(&mut extracted)?;
			extracted_input=Some(extracted.clone());
			load_image(&mut std::io::Cursor::new(extracted))
		},
		Ok(ReaderType::Raw(readable)) => load_image(readable),
		Err(e) => Err(e)?,
	}?.to_rgba8();//this sets a=255, arcane is actually supposed to look like that

	let format=if image.width()%4!=0||image.height()%4!=0{
		image_dds::ImageFormat::R8G8B8A8Srgb
	}else{
		image_dds::ImageFormat::BC7Srgb
	};
	//this fails if the image dimensions are not a multiple of 4
	let dds = image_dds::dds_from_image(
		&image,
		format,
		image_dds::Quality::Slow,
		image_dds::Mipmaps::GeneratedAutomatic,
	)?;

	//write dds
	let mut dest=PathBuf::from("textures/dds");
	dest.push(file_thing.file_name());
	dest.set_extension("dds");
	let mut writer = std::io::BufWriter::new(std::fs::File::create(dest)?);
	dds.write(&mut writer)?;

	if let Some(mut extracted)=extracted_input{
		//write extracted to processed
		let mut dest=PathBuf::from("textures/processed");
		dest.push(file_thing.file_name());
		std::fs::write(dest, &mut extracted)?;
		//delete ugly gzip file
		std::fs::remove_file(file_thing.path())?;
	}else{
		//move file to processed
		let mut dest=PathBuf::from("textures/processed");
		dest.push(file_thing.file_name());
		std::fs::rename(file_thing.path(), dest)?;
	}
	Ok(())
}
fn convert_textures() -> AResult<()>{
	let start = std::time::Instant::now();
	let mut threads=Vec::new();
	for entry in std::fs::read_dir("textures/unprocessed")? {
		let file_thing=entry?;
		threads.push(std::thread::spawn(move ||{
			let file_name=format!("{:?}",file_thing);
			let result=convert(file_thing);
			if let Err(e)=result{
				println!("error processing file:{:?} error message:{:?}",file_name,e);
			}
		}));
	}
	let mut i=0;
	let n_threads=threads.len();
	for thread in threads{
		i+=1;
		if let Err(e)=thread.join(){
			println!("thread error: {:?}",e);
		}else{
			println!("{}/{}",i,n_threads);
		}
	}
	println!("{:?}", start.elapsed());
	Ok(())
}

fn write_attributes() -> AResult<()>{
	for entry in std::fs::read_dir("maps/unprocessed")? {
		let file_thing=entry?;
		println!("processing map={:?}",file_thing.file_name());
		let mut input = std::io::BufReader::new(std::fs::File::open(file_thing.path())?);
		let mut dom = get_dom(&mut input)?;

		let button_refs = get_button_refs(&dom);

		for &button_ref in &button_refs {
			if let Some(button)=dom.get_by_ref_mut(button_ref){
				match button.properties.get_mut("Attributes"){
					Some(rbx_dom_weak::types::Variant::Attributes(attributes))=>{
						println!("Appending Ref={} to existing attributes for {}",button_ref,button.name);
						attributes.insert("Ref".to_string(),rbx_dom_weak::types::Variant::String(button_ref.to_string()));
					},
					None=>{
						println!("Creating new attributes with Ref={} for {}",button_ref,button.name);
						let mut attributes=rbx_dom_weak::types::Attributes::new();
						attributes.insert("Ref".to_string(),rbx_dom_weak::types::Variant::String(button_ref.to_string()));
						button.properties.insert("Attributes".to_string(),rbx_dom_weak::types::Variant::Attributes(attributes));
					}
					_=>unreachable!("Fetching attributes did not return attributes."),
				}
			}
		}
		let mut dest={
			let mut dest=PathBuf::from("maps/attributes");
			dest.push(file_thing.file_name());
			let output = std::io::BufWriter::new(std::fs::File::create(dest)?);
			//write workspace:GetChildren()[1]
			let workspace_children=dom.root().children();
			if workspace_children.len()!=1{
				return Err(anyhow::Error::msg("there can only be one model"));
			}
			rbx_binary::to_writer(output, &dom, &[workspace_children[0]])?;
			//move original to processed folder
			PathBuf::from("maps/unaltered")
		};
		dest.push(file_thing.file_name());
		std::fs::rename(file_thing.path(), dest)?;
	}
	Ok(())
}

enum VMTContent{
	VMT(String),
	VTF(String),
	Patch(vmt_parser::material::PatchMaterial),
	Unsupported,//don't want to deal with whatever vmt variant
	Unresolved,//could not locate a texture because of vmt content
}
impl VMTContent{
	fn vtf(opt:Option<String>)->Self{
		match opt{
			Some(s)=>Self::VTF(s),
			None=>Self::Unresolved,
		}
	}
}

fn get_some_texture(material:vmt_parser::material::Material)->AResult<VMTContent>{
	//just grab some texture from somewhere for now
	Ok(match material{
		vmt_parser::material::Material::LightMappedGeneric(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::VertexLitGeneric(mat)=>VMTContent::vtf(mat.base_texture.or(mat.decal_texture)),//this just dies if there is none
		vmt_parser::material::Material::VertexLitGenericDx6(mat)=>VMTContent::vtf(mat.base_texture.or(mat.decal_texture)),
		vmt_parser::material::Material::UnlitGeneric(mat)=>VMTContent::vtf(mat.base_texture),
		vmt_parser::material::Material::UnlitTwoTexture(mat)=>VMTContent::vtf(mat.base_texture),
		vmt_parser::material::Material::Water(mat)=>VMTContent::vtf(mat.base_texture),
		vmt_parser::material::Material::WorldVertexTransition(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::EyeRefract(mat)=>VMTContent::vtf(Some(mat.cornea_texture)),
		vmt_parser::material::Material::SubRect(mat)=>VMTContent::VMT(mat.material),//recursive
		vmt_parser::material::Material::Sprite(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::SpriteCard(mat)=>VMTContent::vtf(mat.base_texture),
		vmt_parser::material::Material::Cable(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::Refract(mat)=>VMTContent::vtf(mat.base_texture),
		vmt_parser::material::Material::Modulate(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::DecalModulate(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::Sky(mat)=>VMTContent::vtf(Some(mat.base_texture)),
		vmt_parser::material::Material::Replacements(_mat)=>VMTContent::Unsupported,
		vmt_parser::material::Material::Patch(mat)=>VMTContent::Patch(mat),
		_=>return Err(anyhow::Error::msg("vmt failed to parse")),
	})
}

fn get_vmt<F:Fn(String)->AResult<Option<Vec<u8>>>>(find_stuff:&F,search_name:String)->AResult<vmt_parser::material::Material>{
	if let Some(stuff)=find_stuff(search_name)?{
		//decode vmt and then write
		let stuff=String::from_utf8(stuff)?;
		let material=vmt_parser::from_str(stuff.as_str())?;
		println!("vmt material={:?}",material);
		return Ok(material);
	}
	Err(anyhow::Error::msg("vmt not found"))
}

fn recursive_vmt_loader<F:Fn(String)->AResult<Option<Vec<u8>>>>(find_stuff:&F,material:vmt_parser::material::Material)->AResult<Option<Vec<u8>>>{
	match get_some_texture(material)?{
		VMTContent::VMT(s)=>recursive_vmt_loader(find_stuff,get_vmt(find_stuff,s)?),
		VMTContent::VTF(s)=>{
			let mut texture_file_name=PathBuf::from("materials");
			texture_file_name.push(s);
			texture_file_name.set_extension("vtf");
			find_stuff(texture_file_name.into_os_string().into_string().unwrap())
		},
		VMTContent::Patch(mat)=>recursive_vmt_loader(find_stuff,
			mat.resolve(|search_name|{
				match find_stuff(search_name.to_string())?{
					Some(bytes)=>Ok(String::from_utf8(bytes)?),
					None=>Err(anyhow::Error::msg("could not find vmt")),
				}
			})?
		),
		VMTContent::Unsupported=>{println!("Unsupported vmt");Ok(None)},//print and move on
		VMTContent::Unresolved=>{println!("Unresolved vmt");Ok(None)},
	}
}

fn extract_textures(paths:Vec<PathBuf>,vpk_paths:Vec<PathBuf>)->AResult<()>{
	let vpk_list:Vec<vpk::VPK>=vpk_paths.into_iter().map(|vpk_path|vpk::VPK::read(&vpk_path).expect("vpk file does not exist")).collect();
	for path in paths{
		let mut deduplicate=std::collections::HashSet::new();
		let bsp=vbsp::Bsp::read(std::fs::read(path)?.as_ref())?;
		for texture in bsp.textures(){
			deduplicate.insert(PathBuf::from(texture.name()));
		}
		//dedupe prop models
		let mut model_dedupe=std::collections::HashSet::new();
		for prop in bsp.static_props(){
			model_dedupe.insert(prop.model());
		}

		//grab texture names from props
		for model_name in model_dedupe{
			//.mdl, .vvd, .dx90.vtx
			let mut path=PathBuf::from(model_name);
			let file_name=PathBuf::from(path.file_stem().unwrap());
			path.pop();
			path.push(file_name);
			let mut vvd_path=path.clone();
			let mut vtx_path=path.clone();
			vvd_path.set_extension("vvd");
			vtx_path.set_extension("dx90.vtx");
			match (bsp.pack.get(model_name),bsp.pack.get(vvd_path.as_os_str().to_str().unwrap()),bsp.pack.get(vtx_path.as_os_str().to_str().unwrap())){
				(Ok(Some(mdl_file)),Ok(Some(vvd_file)),Ok(Some(vtx_file)))=>{
					match (vmdl::mdl::Mdl::read(mdl_file.as_ref()),vmdl::vvd::Vvd::read(vvd_file.as_ref()),vmdl::vtx::Vtx::read(vtx_file.as_ref())){
						(Ok(mdl),Ok(vvd),Ok(vtx))=>{
							let model=vmdl::Model::from_parts(mdl,vtx,vvd);
							for texture in model.textures(){
								for search_path in &texture.search_paths{
									let mut path=PathBuf::from(search_path.as_str());
									path.push(texture.name.as_str());
									deduplicate.insert(path);
								}
							}
						},
						_=>println!("model_name={} error",model_name),
					}
				},
				_=>println!("no model name={}",model_name),
			}
		}

		let pack=&bsp.pack;
		let vpk_list=&vpk_list;
		std::thread::scope(move|s|{
			let mut thread_handles=Vec::new();
			for texture_name in deduplicate{
				let mut found_texture=false;
				//LMAO imagine having to write type names
				let write_image=|mut stuff,write_file_name|{
					let image=vtf::from_bytes(&mut stuff)?.highres_image.decode(0)?.to_rgba8();

					let format=if image.width()%4!=0||image.height()%4!=0{
						image_dds::ImageFormat::R8G8B8A8Srgb
					}else{
						image_dds::ImageFormat::BC7Srgb
					};
					//this fails if the image dimensions are not a multiple of 4
					let dds = image_dds::dds_from_image(
						&image,
						format,
						image_dds::Quality::Slow,
						image_dds::Mipmaps::GeneratedAutomatic,
					)?;

					//write dds
					let mut dest=PathBuf::from("textures/dds");
					dest.push(write_file_name);
					dest.set_extension("dds");
					std::fs::create_dir_all(dest.parent().unwrap())?;
					let mut writer = std::io::BufWriter::new(std::fs::File::create(dest)?);
					dds.write(&mut writer)?;
					Ok::<(),anyhow::Error>(())
				};
				let find_stuff=|search_file_name:String|{
					println!("search_file_name={}",search_file_name);
					match pack.get(search_file_name.as_str())?{
						Some(file)=>return Ok(Some(file)),
						_=>(),
					}
					//search pak list
					for vpk_index in vpk_list{
						if let Some(vpk_entry)=vpk_index.tree.get(search_file_name.as_str()){
							return Ok(Some(match vpk_entry.get()?{
								std::borrow::Cow::Borrowed(bytes)=>bytes.to_vec(),
								std::borrow::Cow::Owned(bytes)=>bytes,
							}));
						}
					}
					Ok::<Option<Vec<u8>>,anyhow::Error>(None)
				};
				let loader=|texture_name:String|{
					let mut texture_file_name=PathBuf::from("materials");
					//lower case
					let texture_file_name_lowercase=texture_name.to_lowercase();
					texture_file_name.push(texture_file_name_lowercase.clone());
					//remove stem and search for both vtf and vmt files
					let stem=PathBuf::from(texture_file_name.file_stem().unwrap());
					texture_file_name.pop();
					texture_file_name.push(stem);
					//somehow search for both files
					let mut texture_file_name_vmt=texture_file_name.clone();
					texture_file_name.set_extension("vtf");
					texture_file_name_vmt.set_extension("vmt");
					if let Some(stuff)=find_stuff(texture_file_name.to_string_lossy().to_string())?{
						return Ok(Some(stuff))
					}
					recursive_vmt_loader(&find_stuff,get_vmt(&find_stuff,texture_file_name_vmt.to_string_lossy().to_string())?)
				};
				if let Some(stuff)=loader(texture_name.to_string_lossy().to_string())?{
					found_texture=true;
					let texture_name=texture_name.clone();
					thread_handles.push(s.spawn(move||write_image(stuff,texture_name)));
				}
				if !found_texture{
					println!("no data");
				}
			}
			for thread in thread_handles{
				match thread.join(){
					Ok(Err(e))=>println!("write error: {:?}",e),
					Err(e)=>println!("thread error: {:?}",e),
					Ok(_)=>(),
				}
			}
			Ok::<(),anyhow::Error>(())
		})?
	}
	Ok(())
}

fn vpk_contents(vpk_path:PathBuf)->AResult<()>{
	let vpk_index=vpk::VPK::read(&vpk_path)?;
	for (label,entry) in vpk_index.tree.into_iter(){
		println!("vpk label={} entry={:?}",label,entry);
	}
	Ok(())
}

fn bsp_contents(path:PathBuf)->AResult<()>{
	let bsp=vbsp::Bsp::read(std::fs::read(path)?.as_ref())?;
	for file_name in bsp.pack.into_zip().into_inner().unwrap().file_names(){
		println!("file_name={:?}",file_name);
	}
	Ok(())
}

#[derive(Debug)]
enum ConvertError{
	IO(std::io::Error),
	SNFMap(strafesnet_snf::map::Error),
	RbxLoader(strafesnet_rbx_loader::ReadError),
}
impl std::fmt::Display for ConvertError{
	fn fmt(&self,f:&mut std::fmt::Formatter<'_>)->std::fmt::Result{
		write!(f,"{self:?}")
	}
}
impl std::error::Error for ConvertError{}

fn convert_to_snf(pathlist:Vec<std::path::PathBuf>,output_folder:PathBuf)->AResult<()>{
	let start = std::time::Instant::now();
	let mut threads:Vec<std::thread::JoinHandle<Result<(),ConvertError>>>=Vec::new();
	for path in pathlist{
		let output_folder=output_folder.clone();
		threads.push(std::thread::spawn(move ||{
			let dom=strafesnet_rbx_loader::read(
				std::fs::File::open(path.as_path())
				.map_err(ConvertError::IO)?
			).map_err(ConvertError::RbxLoader)?;
			let mut loader=strafesnet_deferred_loader::roblox_legacy();

			let (texture_loader,mesh_loader)=loader.get_inner_mut();

			let map_step1=strafesnet_rbx_loader::convert(
				&dom,
				|name|texture_loader.acquire_render_config_id(name),
				|name|mesh_loader.acquire_mesh_id(name),
			);

			let meshpart_meshes=mesh_loader.load_meshes().map_err(ConvertError::IO)?;

			let map_step2=map_step1.add_meshpart_meshes_and_calculate_attributes(
				meshpart_meshes.into_iter().map(|(mesh_id,loader_model)|
					(mesh_id,strafesnet_rbx_loader::data::RobloxMeshBytes::new(loader_model.get()))
				)
			);

			let (textures,render_configs)=loader.into_render_configs().map_err(ConvertError::IO)?.consume();

			let map=map_step2.add_render_configs_and_textures(
				render_configs.into_iter(),
				textures.into_iter().map(|(texture_id,texture)|
					(texture_id,match texture{
						strafesnet_deferred_loader::texture::Texture::ImageDDS(data)=>data,
					})
				)
			);

			let mut dest=output_folder.clone();
			dest.push(path.file_stem().unwrap());
			dest.set_extension("snfm");
			let file=std::fs::File::create(dest).map_err(ConvertError::IO)?;

			strafesnet_snf::map::write_map(file,map).map_err(ConvertError::SNFMap)?;
			Ok(())
		}));
	}

	let mut i=0;
	let n_threads=threads.len();
	for thread in threads{
		i+=1;
		if let Err(e)=thread.join(){
			println!("thread error: {:?}",e);
		}else{
			println!("{}/{}",i,n_threads);
		}
	}
	println!("{:?}", start.elapsed());
	Ok(())
}