//! Shared access to OpenRPC documents and their Sausage extensions.
use serde_json::{Value, json};

/// An OpenRPC document, including JSON Schema and extension fields.
#[derive(Clone, Debug, PartialEq)]
pub struct Document(pub Value);

impl Document {
    /// Create an empty main interface.
    pub fn new(title: &str, version: &str) -> Self {
        Self(
            json!({"openrpc":"1.2.6", "info":{"title":title,"version":version},
            "methods":[], "components":{"schemas":{}},
            "x-sausage-endpoints":{}, "x-sausage-imports":{}}),
        )
    }

    /// Read the method descriptions.
    pub fn methods(&self) -> &[Value] {
        self.0["methods"]
            .as_array()
            .map(Vec::as_slice)
            .unwrap_or_default()
    }

    /// Read a named schema.
    pub fn schema(&self, name: &str) -> Option<&Value> {
        self.0.get("components")?.get("schemas")?.get(name)
    }

    /// Consume the document as a JSON value.
    pub fn into_value(self) -> Value {
        self.0
    }
}