//! Include-based coverage for USB gadget orchestration helpers.
//!
//! Scope: include `server/src/gadget.rs` and exercise deterministic helper
//! logic and error branches without touching live gadget sysfs state.
//! Targets: `server/src/gadget.rs`.
//! Why: most gadget logic is file-system and errno handling that should remain
//! stable regardless of host environment.

#[allow(warnings)]
mod gadget_include_contract {
    include!(env!("LESAVKA_SERVER_GADGET_SRC"));

    use serial_test::serial;
    use temp_env::with_var;
    use tempfile::{NamedTempFile, tempdir};

    #[test]
    fn new_builds_expected_udc_path() {
        let gadget = UsbGadget::new("lesavka-test");
        assert!(gadget.udc_file.ends_with("/lesavka-test/UDC"));
    }

    #[test]
    fn state_errors_for_missing_controller() {
        let result = UsbGadget::state("definitely-missing-udc");
        assert!(result.is_err());
    }

    #[test]
    fn wait_state_any_times_out_for_missing_controller() {
        let result = UsbGadget::wait_state_any("definitely-missing-udc", 0);
        assert!(result.is_err());
    }

    #[test]
    fn write_attr_writes_value_with_trailing_newline() {
        let file = NamedTempFile::new().expect("temp file");
        UsbGadget::write_attr(file.path(), "configured").expect("write attr");
        let content = std::fs::read_to_string(file.path()).expect("read back");
        assert_eq!(content, "configured\n");
    }

    #[test]
    fn wait_udc_present_times_out_for_missing_path() {
        let result = UsbGadget::wait_udc_present("definitely-missing-udc", 0);
        assert!(result.is_err());
    }

    #[test]
    fn probe_platform_udc_is_non_panicking() {
        let result = UsbGadget::probe_platform_udc();
        assert!(result.is_ok());
    }

    #[test]
    fn find_controller_returns_name_or_error_without_panicking() {
        let result = UsbGadget::find_controller();
        if let Ok(name) = result {
            assert!(!name.is_empty());
        }
    }

    #[test]
    fn is_still_detaching_matches_expected_errno_set() {
        let busy = anyhow::Error::from(std::io::Error::from_raw_os_error(libc::EBUSY));
        let missing = anyhow::Error::from(std::io::Error::from_raw_os_error(libc::ENOENT));
        let no_dev = anyhow::Error::from(std::io::Error::from_raw_os_error(libc::ENODEV));
        let other = anyhow::Error::from(std::io::Error::from_raw_os_error(libc::EACCES));

        assert!(UsbGadget::is_still_detaching(&busy));
        assert!(UsbGadget::is_still_detaching(&missing));
        assert!(UsbGadget::is_still_detaching(&no_dev));
        assert!(!UsbGadget::is_still_detaching(&other));
    }

    #[test]
    #[serial]
    fn cycle_handles_missing_gadget_sysfs_gracefully() {
        let gadget = UsbGadget::new("lesavka-test");
        with_var("LESAVKA_GADGET_FORCE_CYCLE", None::<&str>, || {
            let result = gadget.cycle();
            assert!(result.is_err() || result.is_ok());
        });
    }

    #[test]
    #[serial]
    fn cycle_force_mode_still_returns_without_panicking() {
        let dir = tempdir().expect("tempdir");
        let fake_udc = dir.path().join("UDC");
        std::fs::write(&fake_udc, "").expect("create fake udc file");

        let gadget = UsbGadget {
            udc_file: Box::leak(fake_udc.to_string_lossy().to_string().into_boxed_str()),
        };

        with_var("LESAVKA_GADGET_FORCE_CYCLE", Some("1"), || {
            let result = gadget.cycle();
            assert!(result.is_err() || result.is_ok());
        });
    }
}