//! Rich text editing: range edit/style commands, the Type tools through the session, area and
//! on-path type from paths, Fit Headline, Convert To Area/Point Type.

use serde_json::{Value, json};
use vectorcraft_doc::{NodeId, NodeKind, TextKind, TextObject};
use vectorcraft_geom::Point;
use vectorcraft_tools::{Mods, PointerEvent, PointerKind, ToolKey};

use super::*;

fn session() -> Session {
    // Type placed by the Type tools starts empty (Fill New Type Objects With Placeholder Text off).
    let mut s = Session::new();
    s.prefs.placeholder_text = false;
    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
    s
}

fn text(s: &mut Session, t: &str) -> NodeId {
    let r = s.execute("text.create", &json!({"x": 100, "y": 100, "text": t, "size": 20})).unwrap();
    NodeId(r["id"].as_u64().unwrap())
}

fn obj(s: &Session, id: NodeId) -> TextObject {
    match &s.doc().unwrap().doc.node(id).unwrap().kind {
        NodeKind::Text(t) => (**t).clone(),
        _ => panic!("not text"),
    }
}

fn click(s: &mut Session, x: f64, y: f64) {
    let v = ViewInfo::default();
    for k in [PointerKind::Down, PointerKind::Up] {
        s.pointer(&PointerEvent::new(k, x, y), v).unwrap();
    }
}

fn key(s: &mut Session, k: ToolKey, m: Mods) {
    s.tool_key(k, m, ViewInfo::default()).unwrap();
}

fn undo_labels(s: &Session) -> Vec<String> {
    s.doc().unwrap().history.undo.iter().map(|e| e.label.clone()).collect()
}

#[test]
fn edit_range_replaces_and_undoes() {
    let mut s = session();
    let id = text(&mut s, "Hello world");
    let r = s.execute("text.editRange", &json!({"id": id.0, "start": 6, "end": 11, "insert": "there"})).unwrap();
    assert_eq!(r["caret"], json!(11));
    assert_eq!(obj(&s, id).plain_text(), "Hello there");
    // Out-of-range and reversed offsets are clamped.
    s.execute("text.editRange", &json!({"id": id.0, "start": 99, "end": 5, "insert": "!"})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello!");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello there");
    assert!(s.execute("text.editRange", &json!({"start": 0})).is_err(), "id required");
    let rect = s.execute("shape.rectangle", &json!({"x": 0, "y": 0, "width": 10, "height": 10})).unwrap();
    assert!(s.execute("text.editRange", &json!({"id": rect["id"], "insert": "x"})).is_err(), "not text");
}

#[test]
fn set_range_style_splits_runs() {
    let mut s = session();
    let id = text(&mut s, "Hello brave world");
    let w0 = obj(&s, id).cached_bounds.unwrap().width();
    let r = s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 6, "end": 11, "size": 40, "fill": "#ff0000", "tracking": 50})).unwrap();
    assert_eq!(r["runs"], json!(3));
    let t = obj(&s, id);
    assert_eq!(t.runs[1].text, "brave");
    assert_eq!((t.runs[0].style.size, t.runs[1].style.size, t.runs[2].style.size), (20.0, 40.0, 20.0));
    assert_eq!(t.runs[1].style.tracking, 50.0);
    assert!(t.cached_bounds.unwrap().width() > w0 * 1.2, "bounds refreshed");
    // Kerning / scales / baseline / caps on another range; "auto" leading.
    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 0, "end": 5, "kerning": 20, "hScale": 80, "vScale": 120, "baselineShift": 3, "rotation": 370, "allCaps": true, "leading": "auto", "font": "Inter", "strokeWidth": 1})).unwrap();
    let st = obj(&s, id).runs[0].style.clone();
    assert_eq!((st.kerning, st.h_scale, st.v_scale, st.baseline_shift, st.all_caps), (Some(20.0), 80.0, 120.0, 3.0, true));
    assert!((st.rotation - 10.0).abs() < 1e-9);
    assert_eq!(st.font_family, "Inter");
    // One undo step per command.
    assert_eq!(undo_labels(&s).iter().filter(|l| *l == "Character").count(), 2);
    assert!(s.execute("text.setRangeStyle", &json!({"id": id.0})).is_err(), "nothing to change");
    assert!(s.execute("text.setRangeStyle", &json!({"id": id.0, "size": -1})).is_err());
}

#[test]
fn set_range_style_defaults_to_all_text_and_get_range() {
    let mut s = session();
    let id = text(&mut s, "abc");
    s.execute("text.setRangeStyle", &json!({"id": id.0, "size": 30})).unwrap();
    assert_eq!(obj(&s, id).runs.len(), 1);
    assert_eq!(obj(&s, id).runs[0].style.size, 30.0);
    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 1, "end": 2, "size": 10})).unwrap();
    let r = s.execute("text.getRange", &json!({"id": id.0, "start": 0, "end": 2})).unwrap();
    assert_eq!(r["text"], json!("ab"));
    assert_eq!(r["runs"].as_array().unwrap().len(), 2);
    assert_eq!(r["length"], json!(3));
}

#[test]
fn type_tool_typing_is_one_undo_step() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("Hello", v).unwrap();
    s.tool_text(" world", v).unwrap();
    assert!(s.tool_wants_text());
    assert_eq!(obj(&s, id).plain_text(), "Hello world");
    key(&mut s, ToolKey::Left, Mods::default());
    assert!(!s.in_interaction(), "moving the caret commits");
    assert_eq!(undo_labels(&s).last().map(String::as_str), Some("Typing"));
    s.tool_text("!", v).unwrap();
    // #1686: Escape is the tool's while editing, and asks the UI for the Selection tool.
    assert!(s.tool_claims_key(ToolKey::Escape, v));
    let r = s.tool_key(ToolKey::Escape, Mods::default(), v).unwrap();
    assert!(r.iter().any(|r| matches!(r, UiRequest::SwitchTool(t) if t == "selection")), "{r:?}");
    assert!(!s.tool_claims_key(ToolKey::Escape, v));
    assert_eq!(obj(&s, id).plain_text(), "Hello worl!d");
    // #1686: Escape ends editing, the type still selected; the UI goes on to the Selection tool.
    assert!(!s.tool_wants_text());
    assert_eq!(s.doc().unwrap().selection.objects, vec![id]);
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello world");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "");
}

#[test]
fn undo_while_typing_takes_back_only_the_typing_and_redo_returns_it() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("abc", v).unwrap();
    key(&mut s, ToolKey::Left, Mods::default());
    key(&mut s, ToolKey::Right, Mods::default());
    s.tool_text("def", v).unwrap();
    assert!(s.in_interaction(), "still typing");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc", "only the typing in progress is undone");
    s.execute("edit.redo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abcdef", "and Redo brings it back");
    // Typing on after an undo starts a new session from the restored text.
    s.execute("edit.undo", &json!({})).unwrap();
    s.tool_text("!", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc!");
}

#[test]
fn undo_during_a_drag_takes_back_only_the_drag() {
    let mut s = session();
    let v = ViewInfo::default();
    let r = s.execute("shape.rectangle", &json!({"x": 100, "y": 100, "width": 50, "height": 50})).unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    s.select_tool("selection", v).unwrap();
    s.pointer(&PointerEvent::new(PointerKind::Down, 125.0, 125.0), v).unwrap();
    s.pointer(&PointerEvent::new(PointerKind::Drag, 225.0, 125.0), v).unwrap();
    assert!(s.in_interaction(), "dragging");
    s.execute("edit.undo", &json!({})).unwrap();
    let doc = &s.doc().unwrap().doc;
    let b = doc.bounds_of(&[id], false).expect("the rectangle is still there");
    assert_eq!(b.x0, 100.0, "back where it was: {b:?}");
}

#[test]
fn ime_composition_shows_in_place_and_commits_as_one_step() {
    // Romaji → kana → conversion → commit, as the macOS Japanese IME sends it.
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    let created = undo_labels(&s).len();
    s.tool_text("曲:", v).unwrap();
    for (t, r) in [("g", 1..1), ("が", 1..1), ("がg", 2..2), ("ががく", 3..3)] {
        s.tool_preedit(t, Some(r), v).unwrap();
        assert_eq!(obj(&s, id).plain_text(), format!("曲:{t}"), "marked text lays out in place");
        assert!(s.tool_composing());
    }
    // Conversion: the active clause is the whole word.
    s.tool_preedit("雅楽", Some(0..2), v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "曲:雅楽");
    assert_eq!(s.tool_options()["composing"], json!(true));
    // macOS clears the marked text, then commits.
    s.tool_preedit("", None, v).unwrap();
    s.tool_text("雅楽", v).unwrap();
    assert!(!s.tool_composing());
    assert_eq!(obj(&s, id).plain_text(), "曲:雅楽");
    assert_eq!(s.tool_options()["caret"], json!("曲:雅楽".len()));
    // Typing goes on after the commit, in the same session.
    s.tool_text("。", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), "曲:雅楽。");
    assert_eq!(undo_labels(&s).len(), created + 1, "one undo step for the session");
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "");
}

#[test]
fn ime_cancel_leaves_no_undo_step_and_keeps_the_text() {
    let mut s = session();
    let v = ViewInfo::default();
    let id = text(&mut s, "雅楽");
    s.select_tool("type", v).unwrap();
    let t = obj(&s, id);
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let (a, b) = vectorcraft_text::caret_position(&lay, "雅楽".len());
    let p = t.xf * a.midpoint(b);
    click(&mut s, p.x - 0.1, p.y);
    assert!(s.tool_wants_text());
    s.set_tool_option("select", &json!({"start": 6, "end": 6}));
    let before = undo_labels(&s).len();
    s.tool_preedit("えんそう", Some(4..4), v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "雅楽えんそう");
    // Escape in the IME: the marked text goes, nothing else changes.
    s.tool_preedit("", None, v).unwrap();
    assert!(!s.tool_composing());
    assert!(!s.in_interaction(), "a cancelled composition leaves no typing session");
    assert_eq!(obj(&s, id).plain_text(), "雅楽");
    assert_eq!(undo_labels(&s).len(), before);
    // A stray clear (no composition) never deletes the selection.
    s.set_tool_option("select", &json!({"start": 0, "end": 3}));
    s.tool_preedit("", None, v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "雅楽");
    // A composition over a selection replaces it.
    s.tool_preedit("が", Some(1..1), v).unwrap();
    s.tool_preedit("", None, v).unwrap();
    s.tool_text("我", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "我楽");
}

#[test]
fn clicking_away_keeps_marked_text_as_typed_and_undo_mid_composition_is_safe() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_preedit("しょうこ", Some(4..4), v).unwrap();
    // Keys belong to the IME while it composes.
    key(&mut s, ToolKey::Backspace, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), "しょうこ");
    click(&mut s, 600.0, 500.0);
    assert!(!s.tool_composing());
    assert_eq!(obj(&s, id).plain_text(), "しょうこ", "the marked text stays, committed");
    // The UI holds Undo back while composing; if it comes anyway, the session is committed first.
    click(&mut s, 50.0, 50.0);
    let id2 = s.doc().unwrap().selection.objects[0];
    s.tool_preedit("ひちりき", Some(4..4), v).unwrap();
    s.execute("edit.undo", &json!({})).unwrap();
    assert!(!s.tool_composing());
    assert_eq!(obj(&s, id2).plain_text(), "");
    s.execute("edit.redo", &json!({})).unwrap();
    assert_eq!(obj(&s, id2).plain_text(), "ひちりき");
}

#[test]
fn type_tool_selection_replace_and_delete() {
    let mut s = session();
    let v = ViewInfo::default();
    let id = text(&mut s, "Hello brave world");
    s.select_tool("type", v).unwrap();
    // Click at the start of the text to edit it.
    let t = obj(&s, id);
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let (a, b) = vectorcraft_text::caret_position(&lay, 6);
    let p = t.xf * a.midpoint(b);
    click(&mut s, p.x + 0.1, p.y);
    assert!(s.tool_wants_text());
    assert_eq!(s.tool_options()["caret"], json!(6));
    let shift_word = Mods { shift: true, alt: true, ..Default::default() };
    key(&mut s, ToolKey::Right, shift_word);
    assert_eq!((s.tool_options()["start"].as_u64(), s.tool_options()["end"].as_u64()), (Some(6), Some(11)));
    s.tool_text("bold", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "Hello bold world");
    key(&mut s, ToolKey::Home, Mods { shift: true, ..Default::default() });
    key(&mut s, ToolKey::Delete, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), " world");
    key(&mut s, ToolKey::End, Mods::default());
    key(&mut s, ToolKey::Backspace, Mods { alt: true, ..Default::default() });
    assert_eq!(obj(&s, id).plain_text(), " ");
}

#[test]
fn character_panel_flow_styles_the_selected_range_while_editing() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 50.0, 300.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("Make this big", v).unwrap();
    // Select "this" (still inside the typing session).
    s.set_tool_option("select", &json!({"start": 5, "end": 9}));
    // What the panel does: end the typing session, then style the range.
    s.set_tool_option("commitTyping", &json!(true));
    s.commit_interaction().unwrap();
    let o = s.tool_options();
    s.execute("text.setRangeStyle", &json!({"id": o["editing"], "start": o["start"], "end": o["end"], "size": 48})).unwrap();
    let t = obj(&s, id);
    assert_eq!(t.runs.len(), 3);
    assert_eq!(t.runs[1].text, "this");
    assert_eq!(t.runs[1].style.size, 48.0);
    // Typing continues in a new session, over the styled selection (keeps its style).
    s.tool_text("THAT", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    let t = obj(&s, id);
    assert_eq!(t.plain_text(), "Make THAT big");
    assert_eq!(t.runs[1].text, "THAT");
    assert_eq!(t.runs[1].style.size, 48.0);
    let labels = undo_labels(&s);
    assert_eq!(&labels[labels.len() - 3..], ["Typing", "Character", "Typing"]);
}

#[test]
fn select_all_and_cut_like_ui() {
    let mut s = session();
    let v = ViewInfo::default();
    s.execute("shape.rectangle", &json!({"x": 300, "y": 300, "width": 10, "height": 10})).unwrap();
    let id = text(&mut s, "abc def");
    s.select_tool("type", v).unwrap();
    let t = obj(&s, id);
    let p = t.xf * Point::new(2.0, -5.0);
    click(&mut s, p.x, p.y);
    // Select All while editing takes the text, not the art (the rectangle stays unselected).
    assert!(s.tool_wants_text());
    let o = s.execute("select.all", &json!({})).unwrap();
    assert_eq!(o, json!({"editing": id.0, "start": 0, "end": 7}));
    assert_eq!(s.doc().unwrap().selection.objects, [id]);
    let r = s.execute("text.getRange", &json!({"id": o["editing"], "start": o["start"], "end": o["end"]})).unwrap();
    assert_eq!(r["text"], json!("abc def"));
    s.set_tool_option("copy", &r["runs"]);
    key(&mut s, ToolKey::Delete, Mods::default());
    assert_eq!(obj(&s, id).plain_text(), "");
    s.tool_text("abc def", v).unwrap();
    s.tool_text("abc def", v).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "abc defabc def");
    // Not editing: Select All selects the art again.
    key(&mut s, ToolKey::Escape, Mods::default());
    assert!(!s.tool_wants_text());
    assert_eq!(s.execute("select.all", &json!({})).unwrap(), json!({"count": 2}));
}

#[test]
fn a_frame_dragged_with_the_type_tools_is_the_dragged_rectangle() {
    for tool in ["type", "verticalType"] {
        let mut s = session();
        let v = ViewInfo::default();
        s.select_tool(tool, v).unwrap();
        for (k, x, y) in [(PointerKind::Down, 100.0, 100.0), (PointerKind::Drag, 300.0, 180.0), (PointerKind::Up, 300.0, 180.0)] {
            s.pointer(&PointerEvent::new(k, x, y), v).unwrap();
        }
        let t = obj(&s, s.doc().unwrap().selection.objects[0]);
        let TextKind::Area { frame } = &t.kind else { panic!("{tool}: not area type") };
        let b = frame.bounds().unwrap();
        let (a, z) = (t.xf * Point::new(b.x0, b.y0), t.xf * Point::new(b.x1, b.y1));
        assert!((a - Point::new(100.0, 100.0)).hypot() < 1e-9 && (z - Point::new(300.0, 180.0)).hypot() < 1e-9, "{tool}: {a:?} {z:?}");
    }
}

#[test]
fn area_type_from_a_circle_keeps_glyphs_inside() {
    let mut s = session();
    let e = s.execute("shape.ellipse", &json!({"x": 100, "y": 100, "width": 240, "height": 240})).unwrap();
    let pid = e["id"].as_u64().unwrap();
    let r = s.execute("text.createInPath", &json!({"path": pid, "mode": "area", "text": vectorcraft_engine_placeholder()})).unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    assert!(s.doc().unwrap().doc.node(NodeId(pid)).is_none(), "the path became the frame");
    let t = obj(&s, id);
    assert!(matches!(t.kind, TextKind::Area { .. }));
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    assert!(lay.lines.len() > 5);
    let c = Point::new(220.0, 220.0);
    for g in lay.glyphs.iter().filter(|g| !g.outline.elements().is_empty()) {
        let l = &lay.lines[g.line];
        for q in [Point::new(g.origin.x, l.baseline - l.ascent), Point::new(g.origin.x + g.advance, l.baseline + l.descent)] {
            assert!((t.xf * q - c).hypot() <= 120.5, "{q:?}");
        }
    }
    assert_eq!(s.doc().unwrap().selection.objects, vec![id]);
    assert!(s.execute("text.createInPath", &json!({"path": 9999})).is_err());
}

fn vectorcraft_engine_placeholder() -> String {
    "Type flows inside any closed shape, line by line, trimmed to the shape's edges at each band. ".repeat(4)
}

#[test]
fn type_on_path_starts_where_clicked() {
    let mut s = session();
    let r = s
        .execute("shape.line", &json!({"x1": 100, "y1": 300, "x2": 500, "y2": 300}))
        .or_else(|_| s.execute("path.create", &json!({"points": [[100, 300], [500, 300]], "closed": false})));
    let pid = r.unwrap()["id"].as_u64().unwrap();
    let r = s.execute("text.createInPath", &json!({"path": pid, "mode": "onPath", "text": "On the line", "at": [200, 310]})).unwrap();
    let t = obj(&s, NodeId(r["id"].as_u64().unwrap()));
    let TextKind::OnPath { start, .. } = t.kind else { panic!() };
    assert!((start - 0.25).abs() < 0.01, "{start}");
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let g0 = &lay.glyphs[0];
    assert!((g0.origin.y - 300.0).abs() < 1e-6 && (g0.origin.x - 200.0).abs() < 1.0, "{:?}", g0.origin);
}

#[test]
fn type_on_path_tool_through_session() {
    let mut s = session();
    let v = ViewInfo::default();
    let e = s.execute("shape.ellipse", &json!({"x": 100, "y": 100, "width": 200, "height": 200})).unwrap();
    s.select_tool("typeOnPath", v).unwrap();
    assert_eq!(s.tool_id(), "typeOnPath");
    click(&mut s, 300.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    assert_ne!(id.0, e["id"].as_u64().unwrap());
    s.tool_text("Around", v).unwrap();
    key(&mut s, ToolKey::Escape, Mods::default());
    let t = obj(&s, id);
    assert!(matches!(t.kind, TextKind::OnPath { .. }));
    assert_eq!(t.plain_text(), "Around");
}

#[test]
fn fit_headline_fills_the_frame_width() {
    let mut s = session();
    let r = s
        .execute(
            "text.create",
            &json!({"x": 50, "y": 50, "text": "Headline\nBody copy follows here", "size": 24, "area": {"width": 400, "height": 200}}),
        )
        .unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    let r = s.execute("type.fitHeadline", &json!({"ids": [id.0]})).unwrap();
    assert!(r["tracking"][0].as_f64().unwrap() > 100.0, "{r}");
    let t = obj(&s, id);
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    let l0 = &lay.lines[0];
    assert_eq!(&t.plain_text()[l0.start..l0.end], "Headline", "still one line");
    assert!((l0.x1 - l0.x0 - 400.0).abs() < 1.0, "{}", l0.x1 - l0.x0);
    // The body keeps its tracking.
    assert_eq!(t.runs.last().unwrap().style.tracking, 0.0);
    let p = s.execute("text.create", &json!({"x": 1, "y": 1, "text": "point"})).unwrap();
    assert!(s.execute("type.fitHeadline", &json!({"ids": [p["id"]]})).is_err(), "area type only");
}

fn first_glyph_doc_pos(t: &TextObject) -> Point {
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), t);
    t.xf * lay.glyphs[0].origin
}

#[test]
fn convert_area_point_keeps_text_in_place_for_every_alignment() {
    for j in ["left", "center", "right"] {
        let mut s = session();
        let r = s
            .execute(
                "text.create",
                &json!({"x": 100, "y": 100, "text": "Centered words wrap in a frame", "size": 18, "area": {"width": 150, "height": 200}}),
            )
            .unwrap();
        let id = NodeId(r["id"].as_u64().unwrap());
        s.execute("text.setStyle", &json!({"ids": [id.0], "justify": j})).unwrap();
        let before = first_glyph_doc_pos(&obj(&s, id));
        s.execute("type.convertToPointType", &json!({"ids": [id.0]})).unwrap();
        let t = obj(&s, id);
        assert!(matches!(t.kind, TextKind::Point));
        let after = first_glyph_doc_pos(&t);
        assert!((after - before).hypot() < 0.01, "{j}: {before:?} → {after:?}");
        s.execute("type.convertToAreaType", &json!({"ids": [id.0]})).unwrap();
        let t = obj(&s, id);
        let back = first_glyph_doc_pos(&t);
        assert!((back - before).hypot() < 0.01, "{j} (area again): {before:?} → {back:?}");
        let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
        assert!(!lay.overflow);
    }
}

#[test]
fn commands_are_listed_with_params() {
    let s = session();
    let cmds: Vec<Value> = s.commands().iter().map(|c| serde_json::to_value(c).unwrap()).collect();
    for id in ["text.editRange", "text.setRangeStyle", "text.getRange", "text.createInPath", "type.fitHeadline"] {
        assert!(cmds.iter().any(|c| c["id"] == id), "{id}");
    }
}

#[test]
fn type_tool_state_does_not_leak_across_documents() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 200.0, 200.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("First", v).unwrap();
    // A second document whose first object reuses the same id.
    s.execute("file.new", &json!({"width": 800, "height": 600})).unwrap();
    let id2 = text(&mut s, "Other");
    assert!(!s.tool_wants_text(), "switching documents ends the edit");
    s.tool_text("XYZ", v).unwrap();
    assert_eq!(obj(&s, id2).plain_text(), "Other");
    s.set_active(0);
    assert_eq!(obj(&s, id).plain_text(), "First");
    assert!(!s.in_interaction());
}

#[test]
fn vertical_text_creation_orientation_and_persistence() {
    let mut s = session();
    let r = s.execute("text.create", &json!({"x":100,"y":100,"text":"日本語", "vertical":true})).unwrap();
    let id = NodeId(r["id"].as_u64().unwrap());
    let t = obj(&s, id);
    assert!(t.vertical);
    let round: TextObject = serde_json::from_value(serde_json::to_value(&t).unwrap()).unwrap();
    assert!(round.vertical);
    s.execute("type.orientation.horizontal", &json!({"id":id.0})).unwrap();
    assert!(!obj(&s, id).vertical);
    s.execute("edit.undo", &json!({})).unwrap();
    assert!(obj(&s, id).vertical);
    let old = serde_json::to_value(TextObject::point(Point::ZERO, "old", Default::default())).unwrap();
    assert!(old.get("vertical").is_none());
    let old: TextObject = serde_json::from_value(old).unwrap();
    assert!(!old.vertical);
}

#[test]
fn rtl_edit_commands_and_undo_preserve_logical_source_and_style_ranges() {
    let mut s = session();
    let id = text(&mut s, "שלום Rust 123");
    s.execute("text.editRange", &json!({"id": id.0, "start": 0, "end": 8, "insert": "مرحبا"})).unwrap();
    let t = obj(&s, id);
    assert_eq!(t.plain_text(), "مرحبا Rust 123");
    let lay = vectorcraft_text::layout(vectorcraft_text::FontDb::global(), &t);
    assert!(lay.glyphs.iter().any(|g| g.rtl));
    s.execute("text.setRangeStyle", &json!({"id": id.0, "start": 0, "end": 10, "size": 30})).unwrap();
    assert_eq!(obj(&s, id).runs[0].text, "مرحبا");
    s.execute("edit.undo", &json!({})).unwrap();
    s.execute("edit.undo", &json!({})).unwrap();
    assert_eq!(obj(&s, id).plain_text(), "שלום Rust 123");
}

#[test]
fn automatic_alignment_updates_during_edits_and_can_be_overridden() {
    let mut s = session();
    let id = text(&mut s, "English");
    let db = vectorcraft_text::FontDb::global();
    assert_eq!(obj(&s, id).para.justify, vectorcraft_doc::Justify::Auto);
    for content in ["שלום", "مرحبا", "English"] {
        let len = obj(&s, id).plain_text().len();
        s.execute("text.editRange", &json!({"id": id.0, "start": 0, "end": len, "insert": content})).unwrap();
        let t = obj(&s, id);
        let l = vectorcraft_text::layout(db, &t);
        if content == "English" {
            assert_eq!(l.lines[0].x0, 0.0);
        } else {
            assert!(l.lines[0].x1.abs() < 1e-6);
        }
    }
    s.execute("text.setStyle", &json!({"id": id.0, "justify": "center"})).unwrap();
    s.execute("text.editRange", &json!({"id": id.0, "start": 0, "end": 7, "insert": "שלום"})).unwrap();
    assert_eq!(obj(&s, id).para.justify, vectorcraft_doc::Justify::Center);
    s.execute("text.setStyle", &json!({"id": id.0, "justify": "auto"})).unwrap();
    let t = obj(&s, id);
    assert!(vectorcraft_text::layout(db, &t).lines[0].x1.abs() < 1e-6);
    let restored: TextObject = serde_json::from_value(serde_json::to_value(&t).unwrap()).unwrap();
    assert_eq!(restored.para.justify, vectorcraft_doc::Justify::Auto);
    // Legacy documents with explicit alignment retain that choice.
    let mut legacy = serde_json::to_value(t).unwrap();
    legacy["para"].as_object_mut().unwrap().remove("justify_auto");
    legacy["para"]["justify"] = json!("Left");
    assert_eq!(serde_json::from_value::<TextObject>(legacy).unwrap().para.justify, vectorcraft_doc::Justify::Left);
}

/// #1063: a fill (or stroke) chosen while the Type tool has characters selected colours just
/// those characters, as one undo step; the rest of the type keeps its colour.
#[test]
fn a_fill_chosen_with_characters_selected_colours_only_them() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 50.0, 300.0);
    let id = s.doc().unwrap().selection.objects[0];
    s.tool_text("Sample Text", v).unwrap();
    let before = obj(&s, id).runs[0].style.fill.clone();
    s.set_tool_option("select", &json!({"start": 0, "end": 6}));
    s.execute("paint.setFill", &json!({"color": "#00a000"})).unwrap();
    let t = obj(&s, id);
    assert_eq!(t.runs.len(), 2);
    assert_eq!(t.runs[0].text, "Sample");
    assert_eq!(t.runs[0].style.fill, Paint::solid(vectorcraft_color::Color::rgb8(0, 160, 0)));
    assert_eq!(t.runs[1].text, " Text");
    assert_eq!(t.runs[1].style.fill, before);
    // A stroke goes on the selected characters only, with a weight to show.
    s.execute("paint.setStroke", &json!({"color": "#ff0000"})).unwrap();
    let t = obj(&s, id);
    assert!(t.runs[0].style.stroke_width > 0.0 && !t.runs[0].style.stroke.is_none());
    assert!(t.runs[1].style.stroke.is_none());
    // One undo step each.
    let labels = undo_labels(&s);
    assert_eq!(&labels[labels.len() - 2..], ["Fill Color", "Stroke Color"]);
    s.execute("edit.undo", &json!({})).unwrap();
    s.execute("edit.undo", &json!({})).unwrap();
    assert!(obj(&s, id).runs.iter().all(|r| r.style.fill == before));
}

/// A fill or stroke that the characters selected with the Type tool have already records no undo
/// step: the step to redo stays and the document stays unmodified.
#[test]
fn a_fill_the_selected_characters_have_records_no_undo_step() {
    let mut s = session();
    let v = ViewInfo::default();
    s.select_tool("type", v).unwrap();
    click(&mut s, 50.0, 300.0);
    s.tool_text("Sample Text", v).unwrap();
    s.set_tool_option("select", &json!({"start": 0, "end": 6}));
    s.execute("paint.setFill", &json!({"color": "#00a000"})).unwrap();
    s.execute("paint.setStroke", &json!({"color": "#ff0000"})).unwrap();
    // A blue fill, undone, leaves a step to redo.
    s.execute("paint.setFill", &json!({"color": "#0000ff"})).unwrap();
    s.execute("edit.undo", &json!({})).unwrap();
    s.doc_mut().unwrap().mark_saved();
    let history = |s: &Session| {
        let st = s.doc().unwrap();
        (st.history.undo.len(), st.history.redo.len(), st.is_dirty())
    };
    let before = history(&s);
    assert_eq!((before.1, before.2), (1, false), "a step to redo, and nothing unsaved");
    s.execute("paint.setFill", &json!({"color": "#00a000"})).unwrap();
    s.execute("paint.setStroke", &json!({"color": "#ff0000"})).unwrap();
    assert_eq!(history(&s), before);
}