use thiserror::Error;

#[derive (Debug, Error)]
pub enum LoadTomlError {
	#[error ("Config file has bad permissions mode, it should be octal 0600")]
	ConfigBadPermissions,
	
	#[error ("I/O")]
	Io (#[from] std::io::Error),
	
	#[error ("UTF-8")]
	Utf8 (#[from] std::string::FromUtf8Error),
	
	#[error ("TOML")]
	Toml (#[from] toml::de::Error),
}

#[derive (Debug, Error)]
pub enum ServerError {
	#[error ("Loading TOML")]
	LoadToml (#[from] LoadTomlError),
	
	#[error ("Loading Handlebars template file")]
	LoadHandlebars (#[from] handlebars::TemplateFileError),
	
	#[error ("API key is too weak, server can't use it")]
	WeakApiKey,
	
	#[error ("File server error")]
	FileServer (#[from] super::file_server::errors::FileServerError),
	
	// Hyper stuff
	
	#[error ("Hyper HTTP error")]
	Http (#[from] hyper::http::Error),
	
	#[error ("Hyper invalid header name")]
	InvalidHeaderName (#[from] hyper::header::InvalidHeaderName),
	
	#[error ("API key invalid")]
	ApiKeyInvalid (hyper::header::InvalidHeaderValue),
	
	// MessagePack stuff
	
	#[error ("Can't parse wrapped requests in Step 3")]
	CantParseWrappedRequests (rmp_serde::decode::Error),
	
	#[error ("Can't encode PTTH response as MsgPack in Step 5")]
	MessagePackEncodeResponse (rmp_serde::encode::Error),
	
	#[error ("Can't convert Hyper request to PTTH request")]
	CantConvertHyperToPtth (#[from] ptth_core::http_serde::Error),
	
	// Reqwest stuff
	
	#[error ("Can't build HTTP client")]
	CantBuildHttpClient (reqwest::Error),
	
	#[error ("Can't collect non-200 error response body in Step 3")]
	Step3CollectBody (reqwest::Error),
	
	#[error ("Can't collect wrapped requests in Step 3")]
	CantCollectWrappedRequests (reqwest::Error),
	
	#[error ("Error in Step 5, sending response to client through relay")]
	Step5Responding (reqwest::Error),
	
	#[error ("Error in Step 7, getting response from relay after sending response to client")]
	Step7AfterResponse (reqwest::Error),
	
	// UTF-8
	
	#[error ("Step 3 relay response (non-200 OK) was not valid UTF-8")]
	Step3ErrorResponseNotUtf8 (std::string::FromUtf8Error),
}