//! Headless checks for on-canvas text editing in the viewer and the Character / Paragraph panels
//! acting on the selection (egui_kittest, UI logic only: no GPU needed).

use effectcraft_engine::Session;
use effectcraft_engine::commands::text_edit::layer_doc;
use effectcraft_engine::project::LayerId;
use effectcraft_ui_egui::EffectcraftApp;
use effectcraft_ui_egui::dock::PanelKind;
use egui::{Event, Key, Modifiers, PointerButton, Pos2};
use egui_kittest::Harness;
use serde_json::json;

fn app() -> EffectcraftApp {
    let mut s = Session::default();
    s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
    EffectcraftApp::new(s)
}

fn rect(h: &Harness<'_, EffectcraftApp>, id: &str) -> egui::Rect {
    let e = h.state().auto.find(id).unwrap_or_else(|| panic!("no {id}"));
    egui::Rect::from_min_size(egui::pos2(e.rect[0], e.rect[1]), egui::vec2(e.rect[2], e.rect[3]))
}

fn click(h: &mut Harness<'_, EffectcraftApp>, p: Pos2, modifiers: Modifiers) {
    h.input_mut().events.push(Event::PointerMoved(p));
    h.input_mut().events.push(Event::PointerButton { pos: p, button: PointerButton::Primary, pressed: true, modifiers });
    h.run_steps(1);
    h.input_mut().events.push(Event::PointerButton { pos: p, button: PointerButton::Primary, pressed: false, modifiers });
    h.run_steps(2);
}

fn drag(h: &mut Harness<'_, EffectcraftApp>, from: Pos2, to: Pos2) {
    h.input_mut().events.push(Event::PointerMoved(from));
    h.input_mut().events.push(Event::PointerButton { pos: from, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
    h.run_steps(1);
    for i in 1..=8 {
        h.input_mut().events.push(Event::PointerMoved(from + (to - from) * (i as f32 / 8.0)));
        h.run_steps(1);
    }
    h.input_mut().events.push(Event::PointerButton { pos: to, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
    h.run_steps(2);
}

fn key(h: &mut Harness<'_, EffectcraftApp>, key: Key, modifiers: Modifiers) {
    h.input_mut().events.push(Event::Key { key, physical_key: None, pressed: true, repeat: false, modifiers });
    h.input_mut().events.push(Event::Key { key, physical_key: None, pressed: false, repeat: false, modifiers });
    h.run_steps(2);
}

fn type_text(h: &mut Harness<'_, EffectcraftApp>, t: &str) {
    h.input_mut().events.push(Event::Text(t.into()));
    h.run_steps(2);
}

fn edited(h: &Harness<'_, EffectcraftApp>) -> (u64, String, usize, usize) {
    let s = &h.state().session;
    let e = s.state.text_edit.clone().expect("editing");
    (e.layer.0, layer_doc(s, e.layer).unwrap().text, e.anchor, e.caret)
}

#[test]
fn type_tool_skips_hidden_and_unsoloed_text_layers() {
    for switch in ["video", "solo"] {
        let mut s = Session::default();
        s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
        let mut ids = vec![];
        for _ in 0..2 {
            let lid = s.execute("layer.newText", json!({"text": "alpha beta", "size": 80, "position": [100, 200], "justify": "left"})).unwrap()["layer"]
                .as_u64()
                .unwrap();
            ids.push(lid);
        }
        let (target, value) = if switch == "video" { (ids[1], false) } else { (ids[0], true) };
        s.execute("layer.setSwitch", json!({"layers": [target], "switch": switch, "value": value})).unwrap();
        s.execute("edit.deselectAll", json!({})).unwrap();
        let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).build_eframe(move |_| EffectcraftApp::new(s));
        h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
        h.run_steps(3);
        let comp = rect(&h, "viewer.comp");
        let k = comp.width() / 640.0;
        click(&mut h, comp.min + egui::vec2(330.0 * k, 180.0 * k), Modifiers::NONE);
        assert_eq!(edited(&h).0, ids[0], "{switch}");
    }
}

#[test]
fn modal_blocks_background_text_events() {
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).build_eframe(|_| app());
    h.run_steps(3);
    h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
    h.run_steps(1);
    let p = rect(&h, "viewer.comp").center();
    click(&mut h, p, Modifiers::NONE);
    type_text(&mut h, "Preserve");
    let before = edited(&h).1;
    h.state_mut().dialog = Some(effectcraft_ui_egui::Dialog::About);
    h.run_steps(3);
    h.input_mut().events.push(Event::Text("changed".into()));
    h.input_mut().events.push(Event::Paste("pasted".into()));
    key(&mut h, Key::Backspace, Modifiers::NONE);
    assert_eq!(edited(&h).1, before);
}

#[test]
fn type_tool_click_type_edit_and_commit() {
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(|_| app());
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
    h.run_steps(1);
    let comp = rect(&h, "viewer.comp");
    // Click: a point text layer in edit mode, caret ready.
    click(&mut h, comp.center(), Modifiers::NONE);
    assert_eq!(h.state().session.active_comp().unwrap().layers.len(), 1);
    type_text(&mut h, "Hello");
    type_text(&mut h, " world");
    let (lid, text, a, c) = edited(&h);
    assert_eq!((text.as_str(), a, c), ("Hello world", 11, 11));
    assert!(h.state().auto.find("viewer.textEdit").is_some(), "edit region registered");
    // Arrow keys, Shift-extend, Backspace.
    key(&mut h, Key::ArrowLeft, Modifiers::NONE);
    key(&mut h, Key::ArrowLeft, Modifiers::SHIFT);
    assert_eq!((edited(&h).2, edited(&h).3), (10, 9));
    key(&mut h, Key::Backspace, Modifiers::NONE);
    assert_eq!(edited(&h).1, "Hello word");
    // Word jump and Home / End.
    key(&mut h, Key::Home, Modifiers::NONE);
    assert_eq!(edited(&h).3, 0);
    key(&mut h, Key::ArrowRight, Modifiers::COMMAND);
    assert_eq!(edited(&h).3, 5);
    key(&mut h, Key::End, Modifiers::NONE);
    assert_eq!(edited(&h).3, 10);
    // Enter starts a new paragraph.
    key(&mut h, Key::Enter, Modifiers::NONE);
    type_text(&mut h, "two");
    assert_eq!(edited(&h).1, "Hello word\ntwo");
    // Select all, then the Character panel styles the selection only.
    key(&mut h, Key::ArrowUp, Modifiers::NONE);
    assert!(edited(&h).3 <= 10, "up to the first line");
    key(&mut h, Key::Home, Modifiers::NONE);
    key(&mut h, Key::End, Modifiers::SHIFT);
    let (_, _, a, c) = edited(&h);
    assert_eq!((a, c), (0, 10));
    h.state_mut().show_panel(PanelKind::Character);
    h.run_steps(3);
    let bold = rect(&h, "character.fauxBold");
    click(&mut h, bold.center(), Modifiers::NONE);
    let doc = layer_doc(&h.state().session, LayerId(lid)).unwrap();
    assert!(doc.style_at(2).faux_bold, "selection is bold");
    assert!(!doc.style_at(12).faux_bold, "second paragraph untouched");
    assert_eq!(doc.runs().len(), 2);
    // Undo the style; Escape commits.
    h.state_mut().session.execute("edit.undo", json!({})).unwrap();
    assert!(layer_doc(&h.state().session, LayerId(lid)).unwrap().is_uniform());
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    h.state_mut().session.execute("text.setSelection", json!({"start": 0})).unwrap();
    h.run_steps(2);
    key(&mut h, Key::Escape, Modifiers::NONE);
    assert!(h.state().session.state.text_edit.is_none());
}

/// #831: clicking another panel (a solid's row in the Timeline) ends text editing and gives the
/// keyboard back, whether the edit began with the Type tool (which stays selected) or by command:
/// typed characters change no text and Space plays. The Character panel keeps the edit, and a
/// text layer clicked into being and left empty goes away.
#[test]
fn clicking_another_panel_stops_typing_into_text() {
    for type_tool in [false, true] {
        let mut s = Session::default();
        s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
        let solid = s.execute("layer.newSolid", json!({"name": "Plate", "color": "#406080"})).unwrap()["layer"].as_u64().unwrap();
        let title =
            s.execute("layer.newText", json!({"text": "Title", "size": 80, "position": [100, 120], "justify": "left"})).unwrap()["layer"].as_u64().unwrap();
        let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
        h.state_mut().show_panel(PanelKind::Composition);
        h.run_steps(3);
        let layers = |h: &Harness<'_, EffectcraftApp>| h.state().session.active_comp().unwrap().layers.len();
        // (Its row moves down as text layers are added.)
        let row = |h: &Harness<'_, EffectcraftApp>| rect(h, &format!("timeline.layer.{solid}.row")).center();
        if type_tool {
            h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
            h.run_steps(1);
            let at = rect(&h, "viewer.comp").center();
            click(&mut h, at, Modifiers::NONE);
            assert_eq!(layers(&h), 3, "the Type tool started a text layer");
            let at_row = row(&h);
            click(&mut h, at_row, Modifiers::NONE);
            assert_eq!(layers(&h), 2, "left empty, it is removed");
            click(&mut h, at, Modifiers::NONE);
        } else {
            h.state_mut().session.execute("text.edit", json!({"layer": title})).unwrap();
            h.run_steps(2);
        }
        type_text(&mut h, "Hello");
        // The Character panel formats the selection and keeps the edit: typing carries on.
        key(&mut h, Key::ArrowLeft, Modifiers::SHIFT);
        let range = edited(&h);
        h.state_mut().show_panel(PanelKind::Character);
        h.run_steps(3);
        let bold = rect(&h, "character.fauxBold").center();
        click(&mut h, bold, Modifiers::NONE);
        assert_eq!(edited(&h), range, "type_tool {type_tool}: Character keeps the edit and its selection");
        key(&mut h, Key::End, Modifiers::NONE);
        type_text(&mut h, "!");
        let (lid, text, ..) = edited(&h);
        assert!(text.ends_with("Hello!"), "typing goes into the text: {text:?}");
        let at_row = row(&h);
        click(&mut h, at_row, Modifiers::NONE);
        assert!(h.state().session.state.text_edit.is_none(), "type_tool {type_tool}: clicking the Timeline ends the edit");
        assert_eq!(h.state().session.state.selected_layers, vec![LayerId(solid)]);
        assert!(!h.ctx.memory(|m| m.focused().is_some()), "the keyboard is the app's again");
        type_text(&mut h, "abc");
        assert!(!h.state().playback.playing);
        h.input_mut().events.push(Event::Key { key: Key::Space, physical_key: None, pressed: true, repeat: false, modifiers: Modifiers::NONE });
        h.input_mut().events.push(Event::Text(" ".into()));
        h.input_mut().events.push(Event::Key { key: Key::Space, physical_key: None, pressed: false, repeat: false, modifiers: Modifiers::NONE });
        h.run_steps(2);
        assert_eq!(layer_doc(&h.state().session, LayerId(lid)).unwrap().text, text, "type_tool {type_tool}: the text is unchanged");
        assert!(h.state().playback.playing, "type_tool {type_tool}: Space plays");
        assert_eq!(type_tool, matches!(h.state().ui.tool, effectcraft_ui_egui::state::Tool::Type), "the tool is kept");
    }
}

/// #831: opening a formatting panel's tab behind Effects & Presets in its group (Properties, in
/// Undocked Panels) keeps the edit and its selected characters: the press on the tab used to
/// focus the shown panel and end the edit, after which Faux Bold styled the whole layer.
#[test]
fn opening_a_formatting_tab_keeps_the_text_selection() {
    let mut s = Session::default();
    s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
    let lid =
        s.execute("layer.newText", json!({"text": "Hello world", "size": 80, "position": [60, 200], "justify": "left"})).unwrap()["layer"].as_u64().unwrap();
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
    h.run_steps(3);
    let ctx = h.ctx.clone();
    // Effects & Presets shown, Properties, Character and Paragraph behind it.
    effectcraft_ui_egui::menus::invoke(h.state_mut(), &ctx, "window.workspace", json!({"name": "Undocked Panels"})).unwrap();
    h.state_mut().session.execute("text.edit", json!({"layer": lid})).unwrap();
    h.state_mut().session.execute("text.setSelection", json!({"anchor": 0, "caret": 5})).unwrap();
    h.run_steps(3);
    assert!(h.state().auto.find("properties.text.style").is_none(), "Properties is behind Effects & Presets");
    let tab = rect(&h, "panel.tab.Properties").center();
    click(&mut h, tab, Modifiers::NONE);
    assert!(h.state().auto.find("properties.text.style").is_some(), "the tab opened Properties");
    assert_eq!(edited(&h), (lid, "Hello world".into(), 0, 5), "the edit and its selection are kept");
    h.state_mut().show_panel(PanelKind::Character);
    h.run_steps(3);
    let bold = rect(&h, "character.fauxBold").center();
    click(&mut h, bold, Modifiers::NONE);
    let doc = layer_doc(&h.state().session, LayerId(lid)).unwrap();
    assert!(doc.style_at(1).faux_bold && !doc.style_at(7).faux_bold, "only \"Hello\" is bold");
}

/// #831: a click away and keys in one frame's input. The text gets the keys typed before the
/// click and none after it; those later keys don't run as shortcuts either (Delete would remove a
/// layer). From the next frame the keys are the app's: Space plays.
#[test]
fn keys_after_a_click_away_in_the_same_frame_skip_the_text() {
    let mut s = Session::default();
    s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
    let solid = s.execute("layer.newSolid", json!({"name": "Plate", "color": "#406080"})).unwrap()["layer"].as_u64().unwrap();
    let lid = s.execute("layer.newText", json!({"text": "Hello", "size": 80, "position": [60, 200], "justify": "left"})).unwrap()["layer"].as_u64().unwrap();
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    h.state_mut().session.execute("text.edit", json!({"layer": lid, "caret": 5})).unwrap();
    h.run_steps(2);
    let row = rect(&h, &format!("timeline.layer.{solid}.row")).center();
    let key = |key: Key, pressed: bool| Event::Key { key, physical_key: None, pressed, repeat: false, modifiers: Modifiers::NONE };
    h.input_mut().events.extend([
        Event::Text("A".into()),
        Event::PointerMoved(row),
        Event::PointerButton { pos: row, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE },
        Event::PointerButton { pos: row, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE },
        Event::Text("x".into()),
        key(Key::Space, true),
        Event::Text(" ".into()),
        key(Key::Space, false),
        key(Key::Delete, true),
        key(Key::Delete, false),
    ]);
    h.run_steps(3);
    let comp = |h: &Harness<'_, EffectcraftApp>| h.state().session.active_comp().unwrap().layers.len();
    assert_eq!(layer_doc(&h.state().session, LayerId(lid)).unwrap().text, "HelloA", "only the key before the click");
    assert!(h.state().session.state.text_edit.is_none(), "the click ended the edit");
    assert_eq!((comp(&h), h.state().playback.playing), (2, false), "the keys after it ran no shortcut");
    h.input_mut().events.extend([key(Key::Space, true), Event::Text(" ".into()), key(Key::Space, false)]);
    h.run_steps(2);
    assert!(h.state().playback.playing, "Space plays");
    assert_eq!(layer_doc(&h.state().session, LayerId(lid)).unwrap().text, "HelloA");
}

#[test]
fn switching_from_type_to_selection_commits_and_moves_text_layer() {
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(|_| app());
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
    h.run_steps(1);
    let comp = rect(&h, "viewer.comp");
    let k = comp.width() / 640.0;
    click(&mut h, comp.min + egui::vec2(320.0 * k, 180.0 * k), Modifiers::NONE);
    type_text(&mut h, "Move me");
    let layer_id = h.state().session.state.text_edit.as_ref().unwrap().layer;
    let layer_position = |h: &Harness<'_, EffectcraftApp>| {
        h.state().session.active_comp().unwrap().layer(layer_id).unwrap().props.prop("transform/position").unwrap().value.as_vec3()
    };
    let original_text = layer_doc(&h.state().session, layer_id).unwrap().text;
    let before = layer_position(&h);

    h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Selection;
    h.run_steps(2);
    assert!(h.state().session.state.text_edit.is_none(), "leaving the Type tool commits text editing");
    type_text(&mut h, " ignored");
    assert_eq!(layer_doc(&h.state().session, layer_id).unwrap().text, original_text, "Selection does not type into the layer");
    let from = comp.min + egui::vec2(340.0 * k, 150.0 * k);
    let to = from + egui::vec2(60.0 * k, 50.0 * k);
    drag(&mut h, from, to);
    let after = layer_position(&h);
    assert!(after[0] > before[0] && after[1] > before[1], "Selection dragging moves the text layer: {before:?} -> {after:?}");
}

#[test]
fn double_click_enters_editing_and_selects_words() {
    let mut s = Session::default();
    s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
    let lid =
        s.execute("layer.newText", json!({"text": "alpha beta", "size": 80, "position": [100, 200], "justify": "left"})).unwrap()["layer"].as_u64().unwrap();
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    // A point inside "beta" (comp space → window).
    let comp = rect(&h, "viewer.comp");
    let k = comp.width() / 640.0;
    let p = comp.min + egui::vec2(330.0 * k, 180.0 * k);
    click(&mut h, p, Modifiers::NONE);
    click(&mut h, p, Modifiers::NONE);
    let e = h.state().session.state.text_edit.clone().expect("double-click edits text");
    assert_eq!(e.layer.0, lid);
    assert_eq!((e.anchor.min(e.caret), e.anchor.max(e.caret)), (0, 10), "everything selected");
    // Double-clicking inside the edited text selects a word.
    h.run_steps(40);
    click(&mut h, p, Modifiers::NONE);
    click(&mut h, p, Modifiers::NONE);
    let e = h.state().session.state.text_edit.clone().unwrap();
    assert_eq!((e.anchor, e.caret), (6, 10));
    // Typing replaces it; Cmd+Z undoes while editing.
    type_text(&mut h, "gamma");
    assert_eq!(edited(&h).1, "alpha gamma");
    key(&mut h, Key::Z, Modifiers::COMMAND);
    assert_eq!(edited(&h).1, "alpha beta");
    // Paragraph panel: alignment applies to the edited paragraph (the South Asian and Middle
    // Eastern text engine shows the direction popup too).
    h.state_mut().session.prefs.type_.text_engine = "southAsian".into();
    h.state_mut().show_panel(PanelKind::Paragraph);
    h.run_steps(3);
    let r = rect(&h, "paragraph.right");
    click(&mut h, r.center(), Modifiers::NONE);
    let doc = layer_doc(&h.state().session, LayerId(lid)).unwrap();
    assert_eq!(doc.justify, effectcraft_engine::keyframe::Justify::Right);
    for id in
        ["paragraph.indentLeft", "paragraph.spaceBefore", "paragraph.direction", "paragraph.composer", "paragraph.hangingPunctuation", "paragraph.justifyAll"]
    {
        assert!(h.state().auto.find(id).is_some(), "missing {id}");
    }
}

#[test]
fn type_tool_drag_makes_paragraph_text_with_box_handles() {
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(|_| app());
    h.state_mut().show_panel(PanelKind::Composition);
    h.run_steps(3);
    h.state_mut().ui.tool = effectcraft_ui_egui::state::Tool::Type;
    h.run_steps(1);
    let comp = rect(&h, "viewer.comp");
    let a = comp.min + egui::vec2(comp.width() * 0.2, comp.height() * 0.2);
    let b = comp.min + egui::vec2(comp.width() * 0.7, comp.height() * 0.6);
    h.input_mut().events.push(Event::PointerMoved(a));
    h.input_mut().events.push(Event::PointerButton { pos: a, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
    h.run_steps(1);
    for i in 1..=8 {
        h.input_mut().events.push(Event::PointerMoved(a + (b - a) * (i as f32 / 8.0)));
        h.run_steps(1);
    }
    h.input_mut().events.push(Event::PointerButton { pos: b, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
    h.run_steps(3);
    let (lid, _, _, _) = edited(&h);
    let doc = layer_doc(&h.state().session, LayerId(lid)).unwrap();
    let bs = doc.box_size.expect("paragraph text");
    assert!((bs[0] - 320.0).abs() < 4.0 && (bs[1] - 144.0).abs() < 4.0, "{bs:?}");
    type_text(&mut h, "Some words that wrap inside the box when there are enough of them");
    h.run_steps(2);
    assert!(h.state().auto.find("viewer.textBox.handle.4").is_some());
    // Dragging the bottom-right handle widens the box.
    let hr = rect(&h, "viewer.textBox.handle.4").center();
    let to = hr + egui::vec2(60.0, 0.0);
    h.input_mut().events.push(Event::PointerMoved(hr));
    h.input_mut().events.push(Event::PointerButton { pos: hr, button: PointerButton::Primary, pressed: true, modifiers: Modifiers::NONE });
    h.run_steps(1);
    for i in 1..=6 {
        h.input_mut().events.push(Event::PointerMoved(hr + (to - hr) * (i as f32 / 6.0)));
        h.run_steps(1);
    }
    h.input_mut().events.push(Event::PointerButton { pos: to, button: PointerButton::Primary, pressed: false, modifiers: Modifiers::NONE });
    h.run_steps(2);
    let doc2 = layer_doc(&h.state().session, LayerId(lid)).unwrap();
    assert!(doc2.box_size.unwrap()[0] > bs[0] + 20.0, "{:?}", doc2.box_size);
    assert!(h.state().session.state.text_edit.is_some(), "still editing after resizing");
}

/// #866: Layer ▸ New ▸ Text (menu or its shortcut) puts an insertion point in the comp, as After
/// Effects does, so typed keys reach Source Text (and the layer name follows) instead of running
/// shortcuts while the layer keeps the placeholder "Text".
#[test]
fn layer_new_text_menu_and_shortcut_start_typing_into_source_text() {
    for via_shortcut in [false, true] {
        let mut s = Session::default();
        s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
        s.execute("layer.newSolid", json!({"color": "#ffffff"})).unwrap();
        let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
        h.state_mut().show_panel(PanelKind::Composition);
        h.run_steps(3);
        if via_shortcut {
            key(&mut h, Key::T, Modifiers::COMMAND | Modifiers::ALT | Modifiers::SHIFT);
        } else {
            let ctx = h.ctx.clone();
            effectcraft_ui_egui::menus::invoke(h.state_mut(), &ctx, "layer.newText", json!({})).unwrap();
            h.run_steps(2);
        }
        let (lid, text, _, _) = edited(&h);
        assert_eq!(text, "", "no placeholder to type over (shortcut: {via_shortcut})");
        type_text(&mut h, "My First Project");
        key(&mut h, Key::Escape, Modifiers::NONE);
        assert!(h.state().session.state.text_edit.is_none(), "Escape commits");
        let s = &h.state().session;
        assert_eq!(layer_doc(s, LayerId(lid)).unwrap().text, "My First Project", "typed text is the Source Text");
        assert_eq!(s.active_comp().unwrap().layer(LayerId(lid)).unwrap().name, "My First Project", "the name follows the text");
    }
}

/// Double-clicking a text layer in the Timeline, on its name or on its bar, edits its text in the
/// Composition viewer with the whole text selected, as in After Effects (Enter renames).
#[test]
fn timeline_double_click_on_a_text_layer_edits_its_text() {
    for target in ["row", "bar"] {
        let mut s = Session::default();
        s.execute("comp.new", json!({"name": "Type", "width": 640, "height": 360, "duration": 2})).unwrap();
        let lid = s.execute("layer.newText", json!({"text": "alpha beta"})).unwrap()["layer"].as_u64().unwrap();
        let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| EffectcraftApp::new(s));
        h.state_mut().show_panel(PanelKind::Composition);
        h.run_steps(3);
        let p = rect(&h, &format!("timeline.layer.{lid}.{target}")).center();
        click(&mut h, p, Modifiers::NONE);
        click(&mut h, p, Modifiers::NONE);
        let (layer, text, anchor, caret) = edited(&h);
        assert_eq!(layer, lid, "{target}");
        assert_eq!((anchor.min(caret), anchor.max(caret)), (0, 10), "everything selected ({target})");
        assert!(h.state().auto.find(&format!("timeline.layer.{lid}.nameEdit")).is_none(), "no rename field ({target})");
        assert_eq!(text, "alpha beta");
        type_text(&mut h, "gamma");
        key(&mut h, Key::Escape, Modifiers::NONE);
        assert!(h.state().session.state.text_edit.is_none(), "Escape commits ({target})");
        assert_eq!(layer_doc(&h.state().session, LayerId(lid)).unwrap().text, "gamma", "typing replaced the text ({target})");
    }
}

#[test]
fn duplicated_text_boxes_both_remain_editable() {
    let mut a = app();
    let original = a
        .session
        .execute("layer.newText", json!({"text": "alpha beta", "size": 40, "position": [40, 100], "justify": "left", "box": [40, 60, 250, 100]}))
        .unwrap()["layer"]
        .as_u64()
        .unwrap();
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| a);
    h.run_steps(3);
    h.state_mut().ui.focused = PanelKind::Composition;
    key(&mut h, Key::D, Modifiers::COMMAND);
    let duplicate = h.state().session.state.selected_layers[0].0;
    assert_ne!(original, duplicate);
    h.state_mut().session.execute("prop.set", json!({"layer": duplicate, "path": "transform/position", "value": [465, 110]})).unwrap();
    h.run_steps(3);
    for (layer, x, text) in [(original, 80.0, "original edited"), (duplicate, 380.0, "duplicate edited")] {
        h.run_steps(40);
        let comp = rect(&h, "viewer.comp");
        let k = comp.width() / 640.0;
        let p = comp.min + egui::vec2(x * k, 85.0 * k);
        click(&mut h, p, Modifiers::NONE);
        click(&mut h, p, Modifiers::NONE);
        assert_eq!(edited(&h).0, layer);
        type_text(&mut h, text);
        key(&mut h, Key::Escape, Modifiers::NONE);
        assert_eq!(layer_doc(&h.state().session, LayerId(layer)).unwrap().text, text);
    }
}

#[test]
fn overlapping_duplicate_text_remains_editable_by_double_click_and_selected_type_tool() {
    let mut a = app();
    let original = a.session.execute("layer.newText", json!({"text": "alpha beta", "size": 40, "box": [40, 60, 250, 100]})).unwrap()["layer"].as_u64().unwrap();
    let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| a);
    h.run_steps(3);
    h.state_mut().ui.focused = PanelKind::Composition;
    key(&mut h, Key::D, Modifiers::COMMAND);
    let duplicate = h.state().session.state.selected_layers[0].0;
    assert_ne!(original, duplicate);
    let comp = rect(&h, "viewer.comp");
    let p = comp.min + egui::vec2(80.0, 85.0) * (comp.width() / 640.0);
    click(&mut h, p, Modifiers::NONE);
    click(&mut h, p, Modifiers::NONE);
    assert_eq!(edited(&h).0, duplicate, "double-click edits the topmost overlapping copy");
    type_text(&mut h, "copy edited");
    assert_eq!(edited(&h).1, "copy edited");
    key(&mut h, Key::Z, Modifiers::COMMAND);
    assert_eq!(edited(&h).1, "alpha beta", "undo restores the duplicate's text");
    key(&mut h, Key::Escape, Modifiers::NONE);
    h.state_mut().session.execute("layer.select", json!({"layers": [original]})).unwrap();
    h.state_mut().ui.focused = PanelKind::Composition;
    key(&mut h, Key::T, Modifiers::COMMAND);
    h.run_steps(40);
    click(&mut h, p, Modifiers::NONE);
    assert_eq!(edited(&h).0, original, "the Type tool must honor the explicitly selected overlapping text layer");
    key(&mut h, Key::A, Modifiers::COMMAND);
    type_text(&mut h, "original edited");
    assert_eq!(edited(&h).1, "original edited");
    assert_eq!(layer_doc(&h.state().session, LayerId(duplicate)).unwrap().text, "alpha beta", "editing the original leaves the duplicate unchanged");
    key(&mut h, Key::Z, Modifiers::COMMAND);
    assert_eq!(edited(&h).1, "alpha beta");
}

#[test]
fn type_tool_selected_text_preference_skips_ineligible_layers_and_falls_back_to_topmost() {
    for exclusion in ["hidden", "locked", "inactive", "unsoloed", "outside", "unselected"] {
        let mut a = app();
        let mut ids = vec![];
        for _ in 0..2 {
            ids.push(
                a.session.execute("layer.newText", json!({"text": "alpha beta", "size": 40, "box": [40, 60, 250, 100]})).unwrap()["layer"].as_u64().unwrap(),
            );
        }
        let original = ids[0];
        let topmost = ids[1];
        match exclusion {
            "hidden" | "locked" => {
                let switch = if exclusion == "hidden" { "video" } else { "locked" };
                a.session.execute("layer.setSwitch", json!({"layers": [original], "switch": switch, "value": exclusion == "locked"})).unwrap();
            }
            "inactive" => {
                let cid = a.session.active_comp_id().unwrap();
                std::sync::Arc::make_mut(&mut a.session.project).comp_mut(cid).unwrap().layer_mut(LayerId(original)).unwrap().out_point =
                    effectcraft_engine::time::Tick::ZERO;
            }
            "unsoloed" => {
                a.session.execute("layer.setSwitch", json!({"layers": [topmost], "switch": "solo", "value": true})).unwrap();
            }
            "outside" => {
                a.session.execute("prop.set", json!({"layer": original, "path": "transform/position", "value": [500, 300]})).unwrap();
            }
            _ => {}
        }
        a.session.state.selected_layers = if exclusion == "unselected" { vec![] } else { vec![LayerId(original)] };
        a.ui.tool = effectcraft_ui_egui::state::Tool::Type;
        let mut h = Harness::builder().with_size(egui::vec2(1600.0, 1000.0)).with_step_dt(1.0 / 60.0).build_eframe(move |_| a);
        h.run_steps(3);
        let comp = rect(&h, "viewer.comp");
        let p = comp.min + egui::vec2(80.0, 85.0) * (comp.width() / 640.0);
        click(&mut h, p, Modifiers::NONE);
        assert_eq!(edited(&h).0, topmost, "{exclusion} selected text must not override the eligible hit");
    }
}