use crate::server::ClientId;
use crate::storage::Storage;
use crate::ServerConfig;
use actix_web::{error, http::StatusCode, web, HttpRequest, Result, Scope};

mod add_snapshot;
mod add_version;
mod get_child_version;
mod get_snapshot;

/// The content-type for history segments (opaque blobs of bytes)
pub(crate) const HISTORY_SEGMENT_CONTENT_TYPE: &str =
    "application/vnd.taskchampion.history-segment";

/// The content-type for snapshots (opaque blobs of bytes)
pub(crate) const SNAPSHOT_CONTENT_TYPE: &str = "application/vnd.taskchampion.snapshot";

/// The header name for version ID
pub(crate) const VERSION_ID_HEADER: &str = "X-Version-Id";

/// The header name for client id
pub(crate) const CLIENT_ID_HEADER: &str = "X-Client-Id";

/// The header name for parent version ID
pub(crate) const PARENT_VERSION_ID_HEADER: &str = "X-Parent-Version-Id";

/// The header name for parent version ID
pub(crate) const SNAPSHOT_REQUEST_HEADER: &str = "X-Snapshot-Request";

/// The type containing a reference to the persistent state for the server
pub(crate) struct ServerState {
    pub(crate) storage: Box<dyn Storage>,
    pub(crate) config: ServerConfig,
}

pub(crate) fn api_scope() -> Scope {
    web::scope("")
        .service(get_child_version::service)
        .service(add_version::service)
        .service(get_snapshot::service)
        .service(add_snapshot::service)
}

/// Convert a failure::Error to an Actix ISE
fn failure_to_ise(err: anyhow::Error) -> impl actix_web::ResponseError {
    error::InternalError::new(err, StatusCode::INTERNAL_SERVER_ERROR)
}

/// Get the client id
fn client_id_header(req: &HttpRequest) -> Result<ClientId> {
    fn badrequest() -> error::Error {
        error::ErrorBadRequest("bad x-client-id")
    }
    if let Some(client_id_hdr) = req.headers().get(CLIENT_ID_HEADER) {
        let client_id = client_id_hdr.to_str().map_err(|_| badrequest())?;
        let client_id = ClientId::parse_str(client_id).map_err(|_| badrequest())?;
        Ok(client_id)
    } else {
        Err(badrequest())
    }
}