//! The popups driven by their key tables' commands, as the app drives them.

use super::*;
use crate::input::key::KeyName;
use crate::input::keymap::DEFAULT_LEADER;
use crate::model::test_support::garden;
use crate::model::{Spot, Tags};
use crate::view::test_support::Setup;

const CANVAS: &[Context] = &[Context::Canvas, Context::Normal, Context::Motions];

fn typed(command: Command) -> Typed {
    Typed { command, count: None, register: None }
}

/// Types a search into a list popup, the way `/` and the keys after it do.
fn search(popup: &mut Popup, text: &str, ctx: &ViewContext<'_>) {
    let keymap = Keymap::new(DEFAULT_LEADER);
    popup.command(&typed(Command::Search), &mut Registers::default(), ctx);
    for c in text.chars() {
        popup.typing(Key::char(c), &keymap, ctx);
    }
}

/// Enter, while a search is typed.
fn enter(popup: &mut Popup, ctx: &ViewContext<'_>) -> Vec<Action> {
    popup.typing(Key::plain(KeyName::Enter), &Keymap::new(DEFAULT_LEADER), ctx)
}

fn app(action: AppAction) -> Action {
    Action::App(action)
}

#[test]
fn help_finds_keys_and_commands_and_runs_them() {
    let ((doc, g), setup) = (garden(), Setup::default());
    let ctx = setup.ctx(&doc, g.root);
    let keymap = Keymap::new(DEFAULT_LEADER);
    let help = || Popup::help(&keymap, CANVAS, "canvas", "", &setup.theme);

    let mut popup = help();
    search(&mut popup, "dd", &ctx);
    let dd = Command::Operate(Operator::Delete, Target::Current);
    assert_eq!(enter(&mut popup, &ctx), [app(AppAction::LeaveMode), app(AppAction::Run(dd))]);

    let mut popup = help();
    search(&mut popup, "zoom in", &ctx);
    assert_eq!(enter(&mut popup, &ctx), [app(AppAction::LeaveMode), app(AppAction::Run(Command::ZoomIn))]);

    // A key that waits for more is typed, so the rest can follow.
    let mut popup = help();
    search(&mut popup, "mark this", &ctx);
    let m = vec![Key::char('m')];
    assert_eq!(enter(&mut popup, &ctx), [app(AppAction::LeaveMode), app(AppAction::Type(m))]);

    // A command that needs more opens the command line with it typed.
    let mut popup = Popup::help(&keymap, CANVAS, "canvas", ":color", &setup.theme);
    let confirm = popup.command(&typed(Command::Confirm), &mut Registers::default(), &ctx);
    assert_eq!(confirm, [app(AppAction::LeaveMode), app(AppAction::CommandLineWith("color ".into()))]);
    assert_eq!(popup.label(), "HELP");
}

#[test]
fn the_menu_shows_the_keys_that_do_the_same() {
    let keymap = Keymap::new(DEFAULT_LEADER);
    let tables = keymap.tables(CANVAS);
    assert_eq!(keys_for(&tables, Command::AddChild).as_deref(), Some("a"));
    assert_eq!(keys_for(&tables, Command::PickColor).as_deref(), Some("<Space>c"));
    assert_eq!(keys_for(&tables, Command::Operate(Operator::Delete, Target::Current)).as_deref(), Some("dd"));

    // On the empty canvas, the first thing is a new idea right there.
    let ((doc, g), setup) = (garden(), Setup::default());
    let ctx = setup.ctx(&doc, g.root);
    let spot = CanvasPos::new(60, 30);
    let mut menu =
        Popup::menu(MenuFor::Canvas(spot), "canvas", Position::new(5, 5), &keymap, CANVAS, &setup.theme);
    let actions = menu.command(&typed(Command::Confirm), &mut Registers::default(), &ctx);
    assert_eq!(actions[0], app(AppAction::LeaveMode));
    let Action::Doc(crate::app::action::DocAction::Edit { op, .. }) = &actions[1] else { panic!("an add") };
    let EditOp::Add { node, spot: Spot::Loose } = op.as_ref() else { panic!("a loose node") };
    assert_eq!(node.pos, spot, "where the click was");
}

#[test]
fn pickers_set_what_is_picked() {
    let ((mut doc, g), setup) = (garden(), Setup::default());
    doc.apply(&EditOp::SetTags { id: g.beds, tags: Tags::parse("#wood").unwrap() }).unwrap();
    let ctx = setup.ctx(&doc, g.soil);
    let pick = |kind| Popup::picker(kind, &ctx, &[], 0).unwrap();

    let mut colors = pick(PickKind::Color);
    search(&mut colors, "teal", &ctx);
    let teal = ColorName::parse("teal").ok();
    assert_eq!(
        enter(&mut colors, &ctx),
        [app(AppAction::LeaveMode), Action::edit(EditOp::SetColor { id: g.soil, color: teal })]
    );

    let mut borders = pick(PickKind::Border);
    search(&mut borders, "dashed", &ctx);
    let dashed = Some(Border::Dashed);
    assert_eq!(
        enter(&mut borders, &ctx),
        [app(AppAction::LeaveMode), Action::edit(EditOp::SetBorder { id: g.soil, border: dashed })]
    );

    let no_styles = Popup::picker(PickKind::Style, &ctx, &[], 0).unwrap_err();
    assert_eq!(
        no_styles.text,
        "this theme has no named styles yet: theme files come in part 8b of the build"
    );

    // Tags go on and off, and the picker stays open; a new one is added.
    let mut tags = pick(PickKind::Tags);
    let wood = Tag::parse("wood").unwrap();
    let on = Action::edit(EditOp::Tag { id: g.soil, add: vec![wood.clone()], remove: Vec::new() });
    let off = Action::edit(EditOp::Tag { id: g.soil, add: Vec::new(), remove: vec![wood] });
    let mut registers = Registers::default();
    assert_eq!(tags.command(&typed(Command::Confirm), &mut registers, &ctx), [on]);
    assert_eq!(tags.command(&typed(Command::Confirm), &mut registers, &ctx), [off]);
    search(&mut tags, "spring", &ctx);
    let spring = Tag::parse("spring").unwrap();
    assert_eq!(
        enter(&mut tags, &ctx),
        [Action::edit(EditOp::Tag { id: g.soil, add: vec![spring], remove: Vec::new() })]
    );

    // Documents: it starts on the one shown; the next one is a j away, and
    // one opened lately two more (past its heading).
    let row =
        |name: &str, open| DocumentRow { name: name.into(), path: format!("/notes/{name}.cum").into(), open };
    let documents = [row("Garden plans", true), row("Kitchen", true), row("Reading", false)];
    let mut picker = Popup::picker(PickKind::Document, &ctx, &documents, 0).unwrap();
    let down = typed(Command::Move(crate::input::command::Motion::Down));
    picker.command(&down, &mut registers, &ctx);
    assert_eq!(
        picker.command(&typed(Command::Confirm), &mut registers, &ctx),
        [app(AppAction::LeaveMode), app(AppAction::SwitchDocument(DocumentChoice::At(1)))]
    );
    picker.command(&down, &mut registers, &ctx);
    let path = Some(std::path::Path::new("/notes/Reading.cum").display().to_string());
    assert_eq!(
        picker.command(&typed(Command::Confirm), &mut registers, &ctx),
        [app(AppAction::LeaveMode), app(AppAction::Edit { path, force: false })]
    );
}

#[test]
fn the_card_edits_the_body_and_closes() {
    let ((doc, g), setup) = (garden(), Setup::default());
    let ctx = setup.ctx(&doc, g.beds);
    let mut card = Popup::card(g.beds);
    assert_eq!((card.label(), card.contexts()), ("CARD", &[Context::Card][..]));
    let mut registers = Registers::default();
    let start = StartEdit::Body { at: EditAt::End, in_card: true };
    assert_eq!(
        card.command(&typed(Command::EditBody), &mut registers, &ctx),
        [app(AppAction::StartEdit(start))]
    );
    assert_eq!(card.command(&typed(Command::Escape), &mut registers, &ctx), [app(AppAction::LeaveMode)]);
}