#[slhx::surface]
pub mod ui {}

#[cfg(test)]
mod tests {
    use super::ui;
    use hemplate::Hemplate;
    use slhx::{push, Effect, IntoEffect, NavigateMode, Payload, SafeHtml};
    use slhx_test::inspect;

    #[derive(Clone, Debug)]
    struct Todo {
        id: u64,
        title: String,
    }

    #[derive(Clone, Debug)]
    struct TodoInput {
        title: String,
    }

    #[derive(Clone, Debug)]
    struct WizardInput {
        step: u8,
    }

    #[derive(Clone, Debug)]
    struct Credentials {
        email: String,
        password: String,
    }

    #[derive(Hemplate)]
    #[hemplate = "partials"]
    struct TodoRow {
        title: String,
    }

    // req: examples/001 req: ceremony/001 req: build/001 req: build/005 req: codegen/002
    #[test]
    fn counter_updates_a_generated_slot() {
        fn increment(count: u64) -> impl IntoEffect {
            ui::slots::counter_value.text(count + 1)
        }

        let effect = inspect(increment(1));

        assert!(effect.has_slot(ui::slots::counter_value));
        assert!(matches!(effect.ops(), [Effect::Put { .. }]));
    }

    // req: examples/001 req: progressive_disclosure/001 req: build/001 req: build/005 req: codegen/002
    #[test]
    fn todos_append_keyed_rows_from_form_input() {
        fn add_todo(input: TodoInput) -> impl IntoEffect {
            let todo = Todo { id: 7, title: input.title };
            ui::slots::todo_row.append_html(todo.id.to_string(), render_todo_row(&todo))
        }

        let effect = inspect(add_todo(TodoInput { title: "Ship v0".into() }));

        assert!(effect.has_resource(ui::slots::todo_row.id()));
        assert!(matches!(effect.ops(), [Effect::Insert { key, payload, .. }] if key == "7" && matches!(payload, Payload::Html(_))));
    }

    fn render_todo_row(todo: &Todo) -> SafeHtml {
        // req: html_safety/002 req: view/001
        SafeHtml::trusted(
            TodoRow { title: todo.title.clone() }
                .render()
                .expect("v0 todo row renders"),
        )
    }

    // req: examples/001 req: progressive_disclosure/001 req: build/001 req: build/005 req: codegen/004
    #[test]
    fn wizard_form_swaps_the_current_step() {
        fn next_step(input: WizardInput) -> impl IntoEffect {
            ui::slots::wizard_step.text(format!("Step {}", input.step + 1))
        }

        let effect = inspect(next_step(WizardInput { step: 1 }));

        assert!(effect.has_slot(ui::slots::wizard_step));
        assert!(matches!(effect.ops(), [Effect::Put { .. }]));
    }

    // req: examples/001 req: page_swap/002 req: page_swap/003 req: build/001 req: build/005
    #[test]
    fn page_swap_updates_content_and_history() {
        fn load_docs() -> impl IntoEffect {
            (
                ui::slots::content.text("<h1>Docs</h1>"),
                ui::slots::title.text("Docs"),
                push("/docs"),
            )
        }

        let effect = inspect(load_docs());

        assert!(effect.has_slot(ui::slots::content));
        assert!(effect.has_slot(ui::slots::title));
        assert!(matches!(effect.ops().last(), Some(Effect::Navigate { url, mode: NavigateMode::Push, .. }) if url == "/docs"));
    }

    // req: examples/001 req: progressive_disclosure/001 req: build/001 req: build/005 req: codegen/004
    #[test]
    fn auth_flow_reads_typed_input_and_updates_status() {
        fn login(input: Credentials) -> impl IntoEffect {
            let status = if input.email == "demo@example.com" && !input.password.is_empty() {
                "Signed in"
            } else {
                "Try again"
            };

            ui::slots::login_status.text(status)
        }

        let effect = inspect(login(Credentials { email: "demo@example.com".into(), password: "secret".into() }));

        assert!(effect.has_slot(ui::slots::login_status));
        assert!(matches!(effect.ops(), [Effect::Put { .. }]));
    }

    // req: examples/001 req: push/001 req: push/003 req: build/001 req: build/005
    #[test]
    fn sse_notifications_update_a_generated_slot() {
        fn notification(message: &str) -> impl IntoEffect {
            ui::slots::notifications.text(message)
        }

        let effect = inspect(notification("Build finished"));

        assert!(effect.has_slot(ui::slots::notifications));
        assert!(matches!(effect.ops(), [Effect::Put { .. }]));
    }
}