use evm_client::{EvmClient, EvmProvider, Signer};

// Dummy signer that returns a known Ethereum address (Vitalik's address)
struct DummySigner;

// --- IMPORTANT ---
// The Signer trait's async methods require different trait bounds on native vs WASM:
// - Native Rust: futures must be Send, so use #[async_trait::async_trait]
// - WASM (wasm32): futures do NOT require Send, so use #[async_trait::async_trait(?Send)]
// This split is required for cross-platform test compatibility. DO NOT merge these impls!
#[cfg(not(target_arch = "wasm32"))]
#[async_trait::async_trait]
impl Signer for DummySigner {
    async fn sign(&self, _message: &[u8]) -> Result<Vec<u8>, evm_client::EvmError> {
        Err(evm_client::EvmError::Vault("sign not implemented".to_string()))
    }
    fn address(&self) -> String {
        // Vitalik's main address (has funds on mainnet)
        "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045".to_string()
    }
}

#[cfg(not(target_arch = "wasm32"))]
#[tokio::test]
async fn test_get_balance_vitalik() {
    // Use a public Ethereum mainnet RPC
    let provider = EvmProvider::Http {
        name: "mainnet".to_string(),
        url: "https://eth.drpc.org".to_string(),
        chain_id: 1,
    };
    let signer = DummySigner;
    let mut client = EvmClient::new(signer);
    client.add_provider("mainnet".to_string(), provider);
    client.set_current("mainnet").unwrap();
    let balance = client.get_balance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045").await.unwrap();
    assert!(balance > 0, "Vitalik's balance should be greater than zero");
}

#[cfg(target_arch = "wasm32")]
use wasm_bindgen_test::*;

// See explanation above for why this impl uses ?Send
#[cfg(target_arch = "wasm32")]
#[async_trait::async_trait(?Send)]
impl Signer for DummySigner {
    async fn sign(&self, _message: &[u8]) -> Result<Vec<u8>, evm_client::EvmError> {
        Err(evm_client::EvmError::Vault("sign not implemented".to_string()))
    }
    fn address(&self) -> String {
        // Vitalik's main address (has funds on mainnet)
        "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045".to_string()
    }
}

#[cfg(target_arch = "wasm32")]
wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);

#[cfg(target_arch = "wasm32")]
#[wasm_bindgen_test(async)]
async fn test_get_balance_vitalik_browser() {
    let provider = EvmProvider::Http {
        name: "mainnet".to_string(),
        url: "https://eth.drpc.org".to_string(),
        chain_id: 1,
    };
    let signer = DummySigner;
    let mut client = EvmClient::new(signer);
    client.add_provider("mainnet".to_string(), provider);
    client.set_current("mainnet").unwrap();
    let balance = client.get_balance("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045").await;
    assert!(balance.is_ok(), "Balance query should succeed in browser");
    let balance = balance.unwrap();
    assert!(balance > 0u128, "Vitalik's balance should be greater than zero");
}