use hemx_core::{
    event, navigate, redirect, replace, Atom, AtomSnapshot, AtomState, BuildFingerprint,
    ComponentRef, CssClass, CssClasses, Effect, EffectBatch, Form, Handle, IntoEffect, KeyedSlot,
    NavigateMode, ParamName, Payload, ResourceKind, SafeHtml, ScopeKey, Slot,
};

#[test]
fn effect_batch_wire_round_trips() {
    let count = Slot::<u32>::new(1);
    let todos = KeyedSlot::<u64, String>::new(2);
    let user = Atom::<String>::new(3);

    let batch = (
        count.text(2),
        todos.append_text(7, String::from("Buy milk")),
        todos.replace_text(7, String::from("Buy oat milk")),
        user.set("Ada"),
        navigate("/todos"),
        event("toast", "Saved"),
    )
        .into_batch(BuildFingerprint(42));

    let bytes = batch.to_wire();
    assert_eq!(&bytes[..4], b"HEMX");
    let decoded = EffectBatch::from_wire(&bytes).unwrap();

    assert_eq!(decoded, batch);
    assert!(decoded.is_compatible());
}

#[test]
fn optional_effects_compose_into_batches() {
    // req: component/005 req: public_api/003
    let count = Slot::<u32>::new(1);
    let batch = (Some(count.text(2)), Option::<Effect>::None).into_batch(BuildFingerprint(42));

    assert_eq!(batch.ops.len(), 1);
    assert_eq!(batch.ops[0], count.text(2));
}

#[test]
fn effect_collections_compose_into_batches() {
    // req: canonical_authoring/003
    let rows = KeyedSlot::<u64, String>::new(2);
    let summary = Slot::<u32>::new(3);
    let notice = Slot::<String>::new(4);

    let dynamic_rows = [7, 8]
        .into_iter()
        .map(|id| rows.replace_text(id, format!("todo {id}")))
        .collect::<Vec<_>>();
    let fixed_notices = [notice.text("Saved"), notice.text("Synced")];

    let batch =
        (dynamic_rows, Some(summary.text(2)), fixed_notices).into_batch(BuildFingerprint(42));

    assert_eq!(batch.ops.len(), 5);
    assert_eq!(batch.ops[0], rows.replace_text(7, String::from("todo 7")));
    assert_eq!(batch.ops[1], rows.replace_text(8, String::from("todo 8")));
    assert_eq!(batch.ops[2], summary.text(2));
    assert_eq!(batch.ops[3], notice.text("Saved"));
    assert_eq!(batch.ops[4], notice.text("Synced"));
}

#[test]
fn keyed_slot_replace_uses_scoped_resource_ref() {
    let todos = KeyedSlot::<u64, String>::new(9);
    // req: codegen/002
    let effect = todos.replace_text(12, String::from("done"));

    let Effect::Put { target, payload } = effect else {
        panic!("expected Put");
    };

    assert_eq!(target.resource.kind, ResourceKind::Slot);
    assert_eq!(target.resource.id, 9);
    assert_eq!(target.scope, Some(ScopeKey::KeyValue(String::from("12"))));
    assert_eq!(payload, Payload::Text(String::from("done")));
}

#[test]
fn tuple_composition_supports_arity_twelve() {
    let slot = Slot::<u8>::new(1);
    let batch = (
        slot.text(1),
        slot.text(2),
        slot.text(3),
        slot.text(4),
        slot.text(5),
        slot.text(6),
        slot.text(7),
        slot.text(8),
        slot.text(9),
        slot.text(10),
        slot.text(11),
        slot.text(12),
    )
        .into_batch(BuildFingerprint(1));

    assert_eq!(batch.ops.len(), 12);
}

#[test]
fn generated_form_helpers_target_form_fields() {
    let signup = Form::<()>::new(4);

    let Effect::Emit { name, payload } = signup.error("email", "Use your work email") else {
        panic!("expected Emit");
    };

    assert_eq!(name, "hemx:form-error");
    assert_eq!(payload, "4\u{1f}email\u{1f}Use your work email");

    let Effect::Focus { target } = signup.focus("email") else {
        panic!("expected Focus");
    };
    assert_eq!(target.scope, Some(ScopeKey::Field(String::from("email"))));
}

#[test]
fn slot_html_requires_explicit_safe_html() {
    let content = Slot::<String>::new(10);
    let Effect::Put { payload, .. } = content.html(SafeHtml::trusted("<strong>ok</strong>")) else {
        panic!("expected Put");
    };

    assert_eq!(payload, Payload::Html(String::from("<strong>ok</strong>")));
}

#[test]
fn safe_html_joins_only_explicit_safe_fragments() {
    // req: html_safety/001 req: html_safety/002
    let html = SafeHtml::join([
        SafeHtml::trusted("<main>"),
        SafeHtml::trusted("<strong>ok</strong>"),
        SafeHtml::trusted("</main>"),
    ]);

    assert_eq!(html.as_str(), "<main><strong>ok</strong></main>");
}

#[test]
fn param_names_format_generated_param_names() {
    // req: codegen/003
    let param = ParamName::new("todo_id");
    assert_eq!(param.as_str(), "todo_id");
    assert_eq!(param.to_string(), "todo_id");
}

#[test]
fn component_refs_format_generated_component_names() {
    // req: component/003
    let component = ComponentRef::new("todo_list");
    assert_eq!(component.as_str(), "todo_list");
    assert_eq!(component.to_string(), "todo_list");
}

#[test]
fn generated_resources_format_for_hemplate_dynamic_attrs() {
    // req: public_api/001 req: public_api/002
    assert_eq!(Slot::<String>::new(10).to_string(), "10");
    assert_eq!(KeyedSlot::<u64, String>::new(11).to_string(), "11");
    assert_eq!(Atom::<String>::new(12).to_string(), "12");
    assert_eq!(Handle::<()>::new(42).to_string(), "42");
    assert_eq!(Form::<()>::new(13).to_string(), "13");
}

#[test]
fn generated_css_classes_join_for_hemplate_dynamic_class_attrs() {
    // req: style/003
    const CARD: CssClass = CssClass::new("work-card");
    const SELECTED: CssClass = CssClass::new("is-selected");

    let classes = CssClasses::from([CARD, SELECTED]);

    assert_eq!(classes.as_str(), "work-card is-selected");
    assert_eq!(classes.to_string(), "work-card is-selected");
    assert_eq!(CARD.with(SELECTED).as_str(), "work-card is-selected");
    assert_eq!(
        CARD.with_if(true, SELECTED).as_str(),
        "work-card is-selected"
    );
    assert_eq!(CARD.with_if(false, SELECTED).as_str(), "work-card");
}

#[test]
fn atom_state_bootstrap_is_postcard_round_trippable() {
    let state = AtomState {
        atoms: vec![AtomSnapshot {
            id: 7,
            bytes: vec![1, 2, 3],
        }],
    };

    let bytes = state.to_postcard().unwrap();
    assert_eq!(AtomState::from_postcard(&bytes).unwrap(), state);
}

#[test]
fn navigation_helpers_choose_explicit_modes() {
    let Effect::Navigate { mode, .. } = navigate("/docs") else {
        panic!("expected Navigate");
    };
    assert_eq!(mode, NavigateMode::Push);

    let Effect::Navigate { mode, .. } = replace("/docs") else {
        panic!("expected Navigate");
    };
    assert_eq!(mode, NavigateMode::Replace);

    let Effect::Navigate { mode, .. } = redirect("/login") else {
        panic!("expected Navigate");
    };
    assert_eq!(mode, NavigateMode::Redirect);
}

#[test]
fn build_fingerprint_is_deterministic_from_abi_parts() {
    let a = BuildFingerprint::from_parts(&[1, 2, 3, 4]);
    let b = BuildFingerprint::from_parts(&[1, 2, 3, 4]);
    let c = BuildFingerprint::from_parts(&[1, 2, 3, 5]);

    assert_eq!(a, b);
    assert_ne!(a, c);
}