//! Contract tests for the launcher layout proportions.
//!
//! Scope: statically guard the GTK layout constants and sizing glue used by
//! the launcher shell.
//! Targets: `client/src/launcher/ui_components.rs`.
//! Why: the launcher is an operational control surface; accidental spacing
//! regressions can hide diagnostics or make eye/device previews unusable.

const UI_SRC: &str = include_str!("../../client/src/launcher/ui_components.rs");

fn const_i32(name: &str) -> i32 {
    let needle = format!("const {name}: i32 = ");
    let line = UI_SRC
        .lines()
        .find(|line| line.trim_start().starts_with(&needle))
        .unwrap_or_else(|| panic!("missing {name} constant"));
    line.trim_start()
        .trim_start_matches(&needle)
        .trim_end_matches(';')
        .parse()
        .unwrap_or_else(|err| panic!("invalid {name} constant: {err}"))
}

fn source_index(needle: &str) -> usize {
    UI_SRC
        .find(needle)
        .unwrap_or_else(|| panic!("missing source marker: {needle}"))
}

#[test]
fn launcher_default_size_stays_inside_1080p() {
    assert_eq!(const_i32("LAUNCHER_DEFAULT_WIDTH"), 1360);
    assert_eq!(const_i32("LAUNCHER_DEFAULT_HEIGHT"), 820);
    assert!(const_i32("LAUNCHER_DEFAULT_WIDTH") <= 1920);
    assert!(const_i32("LAUNCHER_DEFAULT_HEIGHT") <= 1080);
}

#[test]
fn eye_panes_keep_the_locked_larger_preview_footprint() {
    assert_eq!(const_i32("EYE_PREVIEW_MIN_WIDTH"), 460);
    assert_eq!(const_i32("EYE_PREVIEW_MIN_HEIGHT"), 258);
    assert!(
        UI_SRC.contains("caption_label.set_halign(gtk::Align::End)")
            || UI_SRC.contains("capture_label.set_halign(gtk::Align::End)")
    );
    assert!(UI_SRC.contains("capture_label.set_ellipsize(pango::EllipsizeMode::Start);"));
}

#[test]
fn device_staging_and_testing_bottoms_stay_locked_together() {
    assert!(UI_SRC.contains("staging_row.set_homogeneous(true);"));
    assert!(UI_SRC.contains("staging_row.set_vexpand(false);"));
    assert!(UI_SRC.contains("devices_panel.set_valign(gtk::Align::Fill);"));
    assert!(UI_SRC.contains("preview_panel.set_valign(gtk::Align::Fill);"));
    assert!(UI_SRC.contains(
        "let device_body_height_group = gtk::SizeGroup::new(gtk::SizeGroupMode::Vertical);"
    ));
    assert!(UI_SRC.contains("device_body_height_group.add_widget(&devices_body);"));
    assert!(UI_SRC.contains("device_body_height_group.add_widget(&testing_row);"));
}

#[test]
fn device_testing_keeps_webcam_and_mic_playback_as_equal_bottom_columns() {
    assert_eq!(const_i32("CAMERA_PREVIEW_VIEWPORT_WIDTH"), 280);
    assert_eq!(const_i32("CAMERA_PREVIEW_VIEWPORT_HEIGHT"), 158);
    assert!(UI_SRC.contains("webcam_group.set_valign(gtk::Align::Fill);"));
    assert!(UI_SRC.contains("playback_group.set_valign(gtk::Align::Fill);"));
    assert!(UI_SRC.contains("preview_body.set_vexpand(false);"));
    assert!(UI_SRC.contains("playback_body.set_valign(gtk::Align::Fill);"));
    assert!(UI_SRC.contains("audio_check_meter.set_vexpand(true);"));
    assert!(UI_SRC.contains("playback_body.append(&audio_check_meter);"));
    assert!(UI_SRC.contains("playback_body.append(&microphone_replay_button);"));
}

#[test]
fn operations_column_fills_height_and_splits_extra_space_between_logs() {
    assert_eq!(const_i32("SIDE_LOG_HEIGHT"), 124);
    assert!(UI_SRC.contains("operations.set_vexpand(true);"));
    assert!(UI_SRC.contains("operations.set_valign(gtk::Align::Fill);"));
    assert_eq!(
        UI_SRC
            .matches(".min_content_height(SIDE_LOG_HEIGHT)")
            .count(),
        2
    );
    assert_eq!(
        UI_SRC
            .matches(".max_content_height(SIDE_LOG_HEIGHT)")
            .count(),
        2
    );
}

#[test]
fn relay_controls_keep_connect_inline_with_server_entry() {
    assert!(UI_SRC.contains("build_panel(\"Relay Controls\")"));
    assert!(UI_SRC.contains("let relay_row = gtk::Box::new(gtk::Orientation::Horizontal, 8);"));
    assert!(UI_SRC.contains("relay_row.append(&server_entry);"));
    assert!(UI_SRC.contains("let start_button = gtk::Button::with_label(\"Connect\");"));
    assert!(UI_SRC.contains("relay_row.append(&start_button);"));
    assert!(
        source_index("relay_row.append(&server_entry);")
            < source_index("relay_row.append(&start_button);")
    );
}

#[test]
fn remote_audio_gain_control_stays_in_the_operations_rail() {
    assert!(!UI_SRC.contains("Remote Audio"));
    assert!(UI_SRC.contains("let power_shell = gtk::Box::new(gtk::Orientation::Vertical, 6);"));
    assert!(UI_SRC.contains("let power_heading = gtk::Label::new(Some(\"Power\"));"));
    assert!(UI_SRC.contains("power_row.append(&power_heading);"));
    assert!(UI_SRC.contains("let audio_gain_scale ="));
    assert!(UI_SRC.contains("audio_gain_scale.set_draw_value(false);"));
    assert!(UI_SRC.contains("audio_gain_value.set_width_chars(5);"));
    assert!(UI_SRC.contains("audio_gain_row.set_size_request(220, -1);"));
    assert!(UI_SRC.contains("power_shell.append(&audio_gain_row);"));
    assert_eq!(
        UI_SRC
            .matches("connection_body.append(&gtk::Separator::new(gtk::Orientation::Horizontal));")
            .count(),
        2,
        "the operations rail should not gain extra vertical sections that stretch the lower layout"
    );
    assert!(
        source_index("let power_heading = gtk::Label::new(Some(\"Power\"));")
            < source_index("let audio_gain_row = gtk::Box::new(gtk::Orientation::Horizontal, 8);")
    );
    assert!(
        source_index("power_shell.append(&audio_gain_row);")
            < source_index("let routing_heading = gtk::Label::new(Some(\"Input\"));")
    );
}