use elrond_wasm_debug::DebugApi;

elrond_wasm::derive_imports!();

// to test, run the following command in elrond-wasm-debug folder:
// cargo expand --test derive_managed_vec_item_struct_2_test > expanded.rs

#[derive(
    ManagedVecItem, NestedEncode, NestedDecode, TopEncode, TopDecode, PartialEq, Eq, Clone, Debug,
)]
pub struct Struct2 {
    pub u_8: u8,
    pub u_16: u16,
    pub u_32: u32,
    pub u_64: u64,
    pub bool_field: bool,
    pub opt_field: Option<u8>,
}

#[test]
#[allow(clippy::assertions_on_constants)]
fn struct_2_static() {
    assert_eq!(
        <Struct2 as elrond_wasm::types::ManagedVecItem>::PAYLOAD_SIZE,
        18
    );
    assert!(!<Struct2 as elrond_wasm::types::ManagedVecItem>::SKIPS_RESERIALIZATION);
}

#[test]
fn struct_to_bytes_writer() {
    let s = Struct2 {
        u_8: 1u8,
        u_16: 2u16,
        u_32: 3u32,
        u_64: 4u64,
        bool_field: true,
        opt_field: Some(5),
    };

    #[rustfmt::skip]
	let expected_payload = &[
		/* u_8  */ 0x01,
		/* u_16 */ 0x00, 0x02,
		/* u_32 */ 0x00, 0x00, 0x00, 0x03,
		/* u_64 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04,
		/* bool */ 0x01,
        /* opt  */ 0x01, 0x05,
	];

    <Struct2 as elrond_wasm::types::ManagedVecItem>::to_byte_writer(&s, |bytes| {
        assert_eq!(bytes, &expected_payload[..]);
    });
}

#[test]
fn struct_2_from_bytes_reader() {
    let _ = DebugApi::dummy();
    let expected_struct = Struct2 {
        u_8: 1u8,
        u_16: 2u16,
        u_32: 3u32,
        u_64: 4u64,
        bool_field: false,
        opt_field: Some(5),
    };

    #[rustfmt::skip]
	let payload = &[
		/* u_8  */ 0x01,
		/* u_16 */ 0x00, 0x02,
		/* u_32 */ 0x00, 0x00, 0x00, 0x03,
		/* u_64 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04,
		/* bool */ 0x00,
        /* opt  */ 0x01, 0x05,
	];

    let struct_from_bytes =
        <Struct2 as elrond_wasm::types::ManagedVecItem>::from_byte_reader(|bytes| {
            bytes.copy_from_slice(&payload[..]);
        });
    assert_eq!(expected_struct, struct_from_bytes);
}