use std::{path::Path, sync::Arc};

use pathfinder_geometry::vector::vec2f;

use galaxy_core::ui::appearance::Appearance;
#[cfg(feature = "local_fs")]
use galaxy_files::FileModel;
use galaxyui::{platform::WindowStyle, App, SingletonEntity, View};
#[cfg(feature = "local_fs")]
use repo_metadata::RepoMetadataModel;
use repo_metadata::{repositories::DetectedRepositories, watcher::DirectoryWatcher};

use crate::server::server_api::team::MockTeamClient;
use crate::server::server_api::workspace::MockWorkspaceClient;
use crate::server::telemetry::context_provider::AppTelemetryContextProvider;
use crate::terminal::keys::TerminalKeybindings;
use crate::{
    auth::{auth_manager::AuthManager, AuthStateProvider},
    cloud_object::model::persistence::CloudModel,
    notebooks::{editor::keys::NotebookKeybindings, file::is_markdown_file},
    search::files::model::FileSearchModel,
    server::server_api::ServerApiProvider,
    settings_view::keybindings::KeybindingChangedNotifier,
    terminal::model::session::Session,
    test_util::settings::initialize_settings_for_tests,
    workspace::ActiveSession,
    workspaces::user_workspaces::UserWorkspaces,
    GlobalResourceHandles, GlobalResourceHandlesProvider,
};

use crate::notebooks::context_menu::MenuSource;

use super::{FileNotebookView, FileState};

fn init_app(app: &mut App) {
    initialize_settings_for_tests(app);

    let global_resource_handles = GlobalResourceHandles::mock(app);
    app.add_singleton_model(|_| GlobalResourceHandlesProvider::new(global_resource_handles));
    app.add_singleton_model(|_| Appearance::mock());
    app.add_singleton_model(|_| ActiveSession::default());
    app.add_singleton_model(|_| KeybindingChangedNotifier::new());
    app.add_singleton_model(DirectoryWatcher::new);
    app.add_singleton_model(|_| DetectedRepositories::default());
    #[cfg(feature = "local_fs")]
    app.add_singleton_model(RepoMetadataModel::new);
    app.add_singleton_model(FileSearchModel::new);
    app.add_singleton_model(FileModel::new);
    app.add_singleton_model(NotebookKeybindings::new);
    app.add_singleton_model(TerminalKeybindings::new);
    app.add_singleton_model(CloudModel::mock);
    app.add_singleton_model(|_| ServerApiProvider::new_for_test());
    app.add_singleton_model(|_| AuthStateProvider::new_for_test());
    app.add_singleton_model(AppTelemetryContextProvider::new_context_provider);
    app.add_singleton_model(AuthManager::new_for_test);
    let team_client_mock = Arc::new(MockTeamClient::new());
    let workspace_client_mock = Arc::new(MockWorkspaceClient::new());
    app.add_singleton_model(|ctx| {
        UserWorkspaces::mock(
            team_client_mock.clone(),
            workspace_client_mock.clone(),
            vec![],
            ctx,
        )
    });
    #[cfg(feature = "voice_input")]
    app.add_singleton_model(voice_input::VoiceInput::new);
}

#[test]
fn test_load_local() {
    App::test((), |mut app| async move {
        init_app(&mut app);
        let (_, handle) = app.add_window(WindowStyle::NotStealFocus, FileNotebookView::new);
        let session = Arc::new(Session::test());
        handle
            .update(&mut app, |file_notebook, ctx| {
                file_notebook.open_local("../README.md", Some(session), ctx);

                let file_id = file_notebook
                    .file_id
                    .expect("File should be opened and have a file_id");

                let future_handle = FileModel::as_ref(ctx)
                    .get_future_handle(file_id)
                    .expect("Loading future should be present");

                ctx.await_spawned_future(future_handle.future_id())
            })
            .await;

        app.read(|ctx| {
            assert_eq!(&handle.as_ref(ctx).title(), "README.md");
            let location = handle
                .as_ref(ctx)
                .location
                .as_ref()
                .expect("Location should be set");
            assert_eq!(location.breadcrumbs, "..");

            let editor = handle.as_ref(ctx).editor.as_ref(ctx);
            assert!(!editor.is_editable(ctx));
            // We don't want to check the actual README contents, but it should be clearly non-empty.
            assert!(editor.markdown(ctx).len() > 4);

            // Rendering should not panic.
            handle.as_ref(ctx).render(ctx);
        });
    });
}

#[test]
fn test_load_before_session() {
    // There might not be a session if:
    // * Restoring a file notebook, since terminal panes won't have bootstrapped yet
    // * Only notebooks are open
    App::test((), |mut app| async move {
        init_app(&mut app);
        let (window_id, handle) = app.add_window(WindowStyle::NotStealFocus, FileNotebookView::new);

        // Open a file we know exists to verify that the view can render.
        handle
            .update(&mut app, |file_notebook, ctx| {
                file_notebook.open_local("../README.md", None, ctx);
                match &file_notebook.file_state {
                    FileState::Loading(source) => {
                        assert_eq!(source.local_path(), Some(Path::new("../README.md")))
                    }
                    other => panic!("Expected FileState::Loading, got {other:?}"),
                }

                let file_id = file_notebook
                    .file_id
                    .expect("File should be opened and have a file_id");

                let future_handle = FileModel::as_ref(ctx)
                    .get_future_handle(file_id)
                    .expect("Loading future should be present");

                ctx.await_spawned_future(future_handle.future_id())
            })
            .await;

        handle.read(&app, |view, _| {
            let expected_path = dunce::canonicalize("../README.md").expect("Path exists");

            assert_eq!(view.title(), expected_path.display().to_string());
            assert!(view.location.is_none());

            match &view.file_state {
                FileState::Loaded(source) => {
                    assert_eq!(source.local_path(), Some(expected_path.as_path()));
                }
                other => panic!("Expected FileState::Loaded, got {other:?}"),
            };
        });

        // Once a local session is available, the view should use it.
        let session = Arc::new(Session::test());
        ActiveSession::handle(&app).update(&mut app, |active_session, ctx| {
            active_session.set_session_for_test(window_id, session.clone(), Some("."), None, ctx);
        });

        handle.read(&app, |view, _| {
            assert_eq!(&view.title(), "README.md");
            // The location should be set, but the exact breadcrumbs depend on where the repo
            // is located.
            assert!(view.location.is_some());
        });
    });
}

#[test]
fn test_load_static() {
    App::test((), |mut app| async move {
        init_app(&mut app);
        let (_, handle) = app.add_window(WindowStyle::NotStealFocus, FileNotebookView::new);

        handle.update(&mut app, |file_notebook, ctx| {
            file_notebook.open_static("Test Title", "Test Content", ctx);
            assert!(file_notebook.file_id.is_none());

            assert!(matches!(file_notebook.file_state, FileState::Loaded(_)));
            assert_eq!(file_notebook.title(), "Test Title");
            assert!(file_notebook.location.is_none());

            let editor = file_notebook.editor.as_ref(ctx);
            assert!(!editor.is_editable(ctx));
            // We don't want to check the actual README contents, but it should be clearly non-empty.
            assert!(editor.markdown(ctx).len() > 4);

            // Rendering should not panic.
            file_notebook.render(ctx);
        });
    });
}

#[test]
fn test_markdown_file_detection() {
    assert!(is_markdown_file("README.md"));
    assert!(is_markdown_file("DATABASE.MD"));
    assert!(is_markdown_file("notes.markdown"));
    assert!(is_markdown_file("README"));
    assert!(is_markdown_file("license"));
    assert!(is_markdown_file("CHANGELOG"));
    assert!(is_markdown_file("ReadMe"));

    assert!(!is_markdown_file("README.txt"));
    assert!(!is_markdown_file("main.rs"));
    assert!(!is_markdown_file("notes"));
}

#[test]
fn test_file_notebook_mermaid_context_menu_does_not_show_copy_image() {
    App::test((), |mut app| async move {
        init_app(&mut app);
        let (_, handle) = app.add_window(WindowStyle::NotStealFocus, FileNotebookView::new);

        handle.update(&mut app, |file_notebook, ctx| {
            file_notebook.open_static("Test Title", "```mermaid\ngraph TD\nA --> B\n```", ctx);

            let source = MenuSource::RichTextEditor {
                parent_offset: vec2f(0., 0.),
                editor: file_notebook.editor.clone(),
            };
            file_notebook.context_menu.show_context_menu(source, ctx);

            let item_names = file_notebook.context_menu.item_names(ctx);
            assert!(!item_names.contains(&"Copy image"));
        });
    });
}