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//! Items related to the DNA initialization callback.
//!
//! # Examples
//! Init pass: <https://github.com/holochain/holochain/blob/develop/crates/test_utils/wasm/wasm_workspace/init_pass/src/lib.rs>
//! Init fail: <https://github.com/holochain/holochain/blob/develop/crates/test_utils/wasm/wasm_workspace/init_fail/src/lib.rs>

use crate::CallbackResult;
use holochain_integrity_types::UnresolvedDependencies;
use holochain_serialized_bytes::prelude::*;
use holochain_wasmer_common::*;

/// The result of the DNA initialization callback.
///
/// This is the aggregated result of all of the DNA's zome initializations.
/// If any zome fails to initialize, the DNA initialization at large will fail.
///
/// [See HDK documentation on init callback.](https://docs.rs/hdk/latest/hdk/index.html#internal-callbacks)
///
/// # Examples
///
/// [Passing initialization](https://github.com/holochain/holochain/blob/develop/crates/test_utils/wasm/wasm_workspace/init_pass/src/lib.rs)
/// [Failing initialization](https://github.com/holochain/holochain/blob/develop/crates/test_utils/wasm/wasm_workspace/init_fail/src/lib.rs)
#[derive(Clone, PartialEq, Serialize, Deserialize, SerializedBytes, Debug)]
pub enum InitCallbackResult {
    Pass,
    Fail(String),
    UnresolvedDependencies(UnresolvedDependencies),
}

impl CallbackResult for InitCallbackResult {
    fn is_definitive(&self) -> bool {
        matches!(self, InitCallbackResult::Fail(_))
    }
    fn try_from_wasm_error(wasm_error: WasmError) -> Result<Self, WasmError> {
        match wasm_error.error {
            WasmErrorInner::Guest(_)
            | WasmErrorInner::Serialize(_)
            | WasmErrorInner::Deserialize(_) => {
                Ok(InitCallbackResult::Fail(wasm_error.to_string()))
            }
            WasmErrorInner::Host(_)
            | WasmErrorInner::HostShortCircuit(_)
            | WasmErrorInner::Compile(_)
            | WasmErrorInner::CallError(_)
            | WasmErrorInner::PointerMap
            | WasmErrorInner::ErrorWhileError
            | WasmErrorInner::Memory
            | WasmErrorInner::UninitializedSerializedModuleCache => Err(wasm_error),
        }
    }
}