// === Non-Standard Linter Configuration ===
#![deny(non_ascii_idents)]
#![warn(unsafe_code)]

use enso_integration_test::prelude::*;

use approx::assert_abs_diff_eq;
use enso_gui::view::graph_editor::component::node::Expression;
use enso_gui::view::graph_editor::GraphEditor;
use enso_gui::view::graph_editor::Node;
use enso_gui::view::graph_editor::NodeId;
use enso_gui::view::graph_editor::NodeSource;
use enso_web::sleep;
use ensogl::display::navigation::navigator::ZoomEvent;
use ordered_float::OrderedFloat;
use std::time::Duration;



wasm_bindgen_test::wasm_bindgen_test_configure!(run_in_browser);

#[wasm_bindgen_test]
async fn create_new_project_and_add_nodes() {
    let test = IntegrationTestOnNewProject::setup().await;
    let graph_editor = test.graph_editor();

    assert_eq!(graph_editor.model.nodes.all.len(), 2);
    let expect_node_added = graph_editor.node_added.next_event();
    graph_editor.add_node();
    let (added_node_id, source_node, _) = expect_node_added.expect();
    assert_eq!(source_node, None);
    assert_eq!(graph_editor.model.nodes.all.len(), 3);

    let added_node =
        graph_editor.model.nodes.get_cloned_ref(&added_node_id).expect("Added node is not added");
    assert_eq!(added_node.view.expression.value().to_string(), "");
}

#[wasm_bindgen_test]
async fn debug_mode() {
    let test = IntegrationTestOnNewProject::setup().await;
    let project = test.project_view();
    let graph_editor = test.graph_editor();

    assert!(!graph_editor.debug_mode.value());

    // Turning On
    let expect_mode = project.debug_mode.next_event();
    let expect_popup_message = project.debug_mode_popup().label().show.next_event();
    project.enable_debug_mode();
    assert!(expect_mode.expect());
    let message = expect_popup_message.expect();
    assert!(
        message.contains("Debug Mode enabled"),
        "Message \"{}\" does not mention enabling Debug mode",
        message
    );
    assert!(
        message.contains(enso_gui::view::debug_mode_popup::DEBUG_MODE_SHORTCUT),
        "Message \"{}\" does not inform about shortcut to turn mode off",
        message
    );
    assert!(graph_editor.debug_mode.value());

    // Turning Off
    let expect_mode = project.debug_mode.next_event();
    let expect_popup_message = project.debug_mode_popup().label().show.next_event();
    project.disable_debug_mode();
    assert!(!expect_mode.expect());
    let message = expect_popup_message.expect();
    assert!(
        message.contains("Debug Mode disabled"),
        "Message \"{}\" does not mention disabling of debug mode",
        message
    );
    assert!(!graph_editor.debug_mode.value());
}

#[wasm_bindgen_test]
async fn zooming() {
    let test = IntegrationTestOnNewProject::setup().await;
    let project = test.project_view();
    let graph_editor = test.graph_editor();
    let camera = test.ide.ensogl_app.display.default_scene.layers.main.camera();
    let navigator = &graph_editor.model.navigator;

    let zoom_on_center = |amount: f32| ZoomEvent { focus: Vector2(0.0, 0.0), amount };
    let zoom_duration_ms = Duration::from_millis(1000);

    // Without debug mode
    navigator.emit_zoom_event(zoom_on_center(-1.0));
    sleep(zoom_duration_ms).await;
    assert_abs_diff_eq!(camera.zoom(), 1.0, epsilon = 0.001);
    navigator.emit_zoom_event(zoom_on_center(1.0));
    sleep(zoom_duration_ms).await;
    assert!(camera.zoom() < 1.0, "Camera zoom {} must be less than 1.0", camera.zoom());
    navigator.emit_zoom_event(zoom_on_center(-2.0));
    sleep(zoom_duration_ms).await;
    assert_abs_diff_eq!(camera.zoom(), 1.0, epsilon = 0.001);

    // With debug mode
    project.enable_debug_mode();
    navigator.emit_zoom_event(zoom_on_center(-1.0));
    sleep(zoom_duration_ms).await;
    assert!(camera.zoom() > 1.0, "Camera zoom {} must be greater than 1.0", camera.zoom());
    navigator.emit_zoom_event(zoom_on_center(5.0));
    sleep(zoom_duration_ms).await;
    assert!(camera.zoom() < 1.0, "Camera zoom {} must be less than 1.0", camera.zoom());
    navigator.emit_zoom_event(zoom_on_center(-5.0));
    sleep(zoom_duration_ms).await;
    assert!(camera.zoom() > 1.0, "Camera zoom {} must be greater than 1.0", camera.zoom());
}

#[wasm_bindgen_test]
async fn adding_node_with_add_node_button() {
    const INITIAL_NODE_COUNT: usize = 2;
    let test = IntegrationTestOnNewProject::setup().await;
    let graph_editor = test.graph_editor();
    let scene = &test.ide.ensogl_app.display.default_scene;

    let nodes = graph_editor.model.nodes.all.keys();
    let nodes_positions = nodes.into_iter().flat_map(|id| graph_editor.model.get_node_position(id));
    let mut sorted_positions = nodes_positions.sorted_by_key(|pos| OrderedFloat(pos.y));
    let bottom_most_pos =
        sorted_positions.next().expect("Default project does not contain any nodes");

    // Node is created below the bottom-most one.
    let (first_node_id, node_source, _) = add_node_with_add_node_button(&graph_editor, "1 + 1");
    assert!(node_source.is_none());
    assert_eq!(graph_editor.model.nodes.all.len(), INITIAL_NODE_COUNT + 1);
    let node_position =
        graph_editor.model.get_node_position(first_node_id).expect("Node was not added");
    assert!(
        node_position.y < bottom_most_pos.y,
        "Expected that {node_position}.y < {bottom_most_pos}.y"
    );

    // Selected node is used as a `source` node.
    graph_editor.model.nodes.deselect_all();
    graph_editor.model.nodes.select(first_node_id);
    let (_, node_source, _) = add_node_with_add_node_button(&graph_editor, "+ 1");
    assert_eq!(node_source, Some(NodeSource { node: first_node_id }));
    assert_eq!(graph_editor.model.nodes.all.len(), INITIAL_NODE_COUNT + 2);

    // If there is a free space, the new node is created in the center of screen.
    let camera = scene.layers.main.camera();
    camera.mod_position_xy(|pos| pos + Vector2(1000.0, 1000.0));
    let wait_for_update = Duration::from_millis(500);
    sleep(wait_for_update).await;
    graph_editor.model.nodes.deselect_all();
    let (node_id, node_source, _) = add_node_with_add_node_button(&graph_editor, "1");
    assert!(node_source.is_none());
    assert_eq!(graph_editor.model.nodes.all.len(), INITIAL_NODE_COUNT + 3);
    let node_position = graph_editor.model.get_node_position(node_id).expect("Node was not added");
    let center_of_screen = scene.screen_to_scene_coordinates(Vector3::zeros());
    assert_abs_diff_eq!(node_position.x, center_of_screen.x, epsilon = 10.0);
    assert_abs_diff_eq!(node_position.y, center_of_screen.y, epsilon = 10.0);
}

#[wasm_bindgen_test]
async fn adding_node_by_clicking_on_the_output_port() {
    let test = IntegrationTestOnNewProject::setup().await;
    let graph_editor = test.graph_editor();
    let (node_1_id, _, node_1) = add_node_with_internal_api(&graph_editor, "1 + 1");

    let output = &node_1.model.output;
    let method = |editor: &GraphEditor| {
        output.test_port_hover();
        editor.start_node_creation_from_port();
    };
    let (_, source, node_2) = add_node(&graph_editor, "+ 1", method);

    assert_eq!(source.unwrap(), NodeSource { node: node_1_id });
    assert!(node_2.position().y < node_1.position().y);
}

fn add_node(
    graph_editor: &GraphEditor,
    expression: &str,
    method: impl Fn(&GraphEditor),
) -> (NodeId, Option<NodeSource>, Node) {
    let node_added = graph_editor.node_added.next_event();
    method(graph_editor);
    let (node_id, source_node, _) = node_added.expect();
    let node = graph_editor.model.nodes.get_cloned_ref(&node_id).expect("Node was not added");
    node.set_expression(Expression::new_plain(expression));
    graph_editor.stop_editing();
    (node_id, source_node, node)
}

fn add_node_with_internal_api(
    graph_editor: &GraphEditor,
    expression: &str,
) -> (NodeId, Option<NodeSource>, Node) {
    let method = |editor: &GraphEditor| editor.add_node();
    add_node(graph_editor, expression, method)
}

fn add_node_with_add_node_button(
    graph_editor: &GraphEditor,
    expression: &str,
) -> (NodeId, Option<NodeSource>, Node) {
    let add_node_button = &graph_editor.model.add_node_button;
    let method = |_: &GraphEditor| add_node_button.click();
    add_node(graph_editor, expression, method)
}