use super::*;
use oa_core::source_project::{ProjectLimits, SourceBundle, compile_bundle};
use std::collections::BTreeMap;

fn source_bundle() -> SourceBundle {
    let bundle = SourceBundle {
        entry: "project.arcadia".into(),
        files: BTreeMap::from([
            ("project.arcadia".into(), "// Project rationale\narcadia 3; project anchors \"Port positions\" { include \"participants.arcadia\"; include \"views.arcadia\"; }\n".into()),
            ("participants.arcadia".into(), r#"// Port ownership and contracts stay in this file.
sa_system system "System" {}
sa_actor vessel "Vessel" {
 sa_port telemetry "Telemetry" { contract { Component { kind Flow; orientation Out; }; }; }
 sa_port health "Health" { contract { Component { kind Flow; orientation Out; }; }; }
}
sa_port inbound "Receive" { parent @system; contract { Component { kind Flow; orientation In; }; }; }
"#.into()),
            ("views.arcadia".into(), r#"// Placement rationale stays in the view file.
diagram architecture "Architecture" { layer Sa; projection Allocation; }
diagram review "Review" { layer Sa; projection Allocation; }
node actor_view { diagram @architecture; element @vessel; }
node review_view { diagram @review; element @vessel; }
"#.into()),
        ]),
    };
    compile_bundle(&bundle, ProjectLimits::default())
        .unwrap()
        .bundle
}

fn id(model: &Project, alias: &str) -> Id {
    model
        .identities()
        .into_iter()
        .find(|(_, a)| *a == alias)
        .unwrap()
        .0
}

async fn import(server: &TestServer) -> StoredProject {
    let response = server
        .client
        .post(server.url("/projects/import-source-project"))
        .json(&source_bundle())
        .send()
        .await
        .unwrap();
    let status = response.status();
    let value: Value = response.json().await.unwrap();
    assert_eq!(status, StatusCode::CREATED, "{value}");
    server
        .get(value["resource_id"].as_str().unwrap().parse().unwrap())
        .await
}

async fn transact(
    server: &TestServer,
    current: &StoredProject,
    commands: Value,
    dry_run: bool,
) -> reqwest::Response {
    server
        .client
        .post(server.url(&format!("/projects/{}/transactions", current.resource_id)))
        .header("if-match", current.etag())
        .json(&json!({"commands":commands,"dry_run":dry_run}))
        .send()
        .await
        .unwrap()
}

fn assert_pair(current: &StoredProject) {
    let compiled = compile_bundle(&current.source_project, ProjectLimits::default()).unwrap();
    assert_eq!(compiled.decoded.project, current.model);
    assert_eq!(compiled.bundle, current.source_project);
}

#[tokio::test]
async fn explicit_empty_port_anchors_survive_http_move_and_restart_but_export_compactly() {
    fn replace_once(source: &mut String, before: &str, after: &str) {
        assert_eq!(
            source.matches(before).count(),
            1,
            "ambiguous or absent anchor: {before}"
        );
        let replacement = source.replacen(before, after, 1);
        assert_ne!(*source, replacement, "fixture mutation must change source");
        *source = replacement;
    }

    async fn assert_exports(server: &TestServer, current: &StoredProject, node: Id) -> String {
        let response = server
            .client
            .get(server.url(&format!("/projects/{}/source-project", current.resource_id)))
            .send()
            .await
            .unwrap();
        assert_eq!(response.status(), StatusCode::OK);
        assert_eq!(response.headers()["etag"], current.etag());
        assert_eq!(
            response.json::<SourceBundle>().await.unwrap(),
            current.source_project
        );

        let response = server
            .client
            .get(server.url(&format!("/projects/{}/source", current.resource_id)))
            .send()
            .await
            .unwrap();
        assert_eq!(response.status(), StatusCode::OK);
        let canonical = response.text().await.unwrap();
        assert_eq!(oa_core::language::parse(&canonical).unwrap(), current.model);
        assert_eq!(canonical, oa_core::language::format(&current.model));
        let exported = compile_bundle(
            &SourceBundle {
                entry: "project.arcadia".into(),
                files: BTreeMap::from([("project.arcadia".into(), canonical.clone())]),
            },
            ProjectLimits::default(),
        )
        .unwrap();
        assert_eq!(exported.decoded.project, current.model);
        assert!(exported.index.declarations.contains_key(&node));
        assert!(
            !exported
                .index
                .fields
                .contains_key(&(node, "port_anchors".into()))
        );
        canonical
    }

    let mut authored = source_bundle();
    replace_once(
        authored.files.get_mut("views.arcadia").unwrap(),
        "diagram @architecture; element @vessel;",
        "diagram @architecture; element @vessel;\n position { x 12.5; y -4.0; };\n port_anchors   [] ; // Keep explicit automatic placement.\n",
    );
    let compiled = compile_bundle(&authored, ProjectLimits::default()).unwrap();
    assert_eq!(
        compiled.bundle, authored,
        "the HTTP fixture must already be stable"
    );
    let diagram = id(&compiled.decoded.project, "architecture");
    let node = id(&compiled.decoded.project, "actor_view");
    assert!(
        compiled
            .index
            .fields
            .contains_key(&(node, "port_anchors".into()))
    );
    assert_eq!(
        compiled.decoded.project.diagrams[&diagram].nodes[&node].position,
        oa_core::Position { x: 12.5, y: -4.0 }
    );
    assert!(
        compiled.decoded.project.diagrams[&diagram].nodes[&node]
            .port_anchors
            .is_empty()
    );

    // Independent full-model oracle: only this placement coordinate changes.
    let mut expected_model = compiled.decoded.project.clone();
    expected_model
        .diagrams
        .get_mut(&diagram)
        .unwrap()
        .nodes
        .get_mut(&node)
        .unwrap()
        .position
        .x = 25.0;
    let mut expected_source = authored.clone();
    replace_once(
        expected_source.files.get_mut("views.arcadia").unwrap(),
        "x 12.5;",
        "x 25.0;",
    );

    let directory = tempfile::tempdir().unwrap();
    let server = TestServer::start(directory.path(), None).await;
    let response = server
        .client
        .post(server.url("/projects/import-source-project"))
        .json(&authored)
        .send()
        .await
        .unwrap();
    let status = response.status();
    let value: Value = response.json().await.unwrap();
    assert_eq!(status, StatusCode::CREATED, "{value}");
    let original = server
        .get(value["resource_id"].as_str().unwrap().parse().unwrap())
        .await;
    assert_eq!(original.model, compiled.decoded.project);
    assert_eq!(original.source_project, authored);
    assert_pair(&original);
    assert_exports(&server, &original, node).await;

    let response = transact(
        &server,
        &original,
        json!([{"MoveNode": {"diagram": diagram, "node": node,
            "position": {"x": 25.0, "y": -4.0}, "with_descendants": false}}]),
        false,
    )
    .await;
    let status = response.status();
    let value: Value = response.json().await.unwrap();
    assert_eq!(status, StatusCode::OK, "{value}");
    assert_eq!(value["changed"], true);
    let current = server.get(original.resource_id).await;
    assert_eq!(current.revision, original.revision + 1);
    assert_eq!(current.model, expected_model);
    // Exact bundle equality covers the explicit empty field, its rationale,
    // sibling placement, and all untouched files and source trivia.
    assert_eq!(current.source_project, expected_source);
    assert_pair(&current);
    let canonical = assert_exports(&server, &current, node).await;

    server.stop().await;
    let server = TestServer::start(directory.path(), None).await;
    let reopened = server.get(current.resource_id).await;
    assert_eq!(reopened.model, expected_model);
    assert_eq!(reopened.source_project, expected_source);
    assert_eq!(
        serde_json::to_value(&reopened).unwrap(),
        serde_json::to_value(&current).unwrap()
    );
    assert_pair(&reopened);
    assert_eq!(assert_exports(&server, &reopened, node).await, canonical);
    server.stop().await;
}

#[tokio::test]
async fn port_anchor_http_commands_and_source_edits_preserve_per_view_state_after_restart() {
    let directory = tempfile::tempdir().unwrap();
    let server = TestServer::start(directory.path(), None).await;
    let original = import(&server).await;
    let model = &original.model;
    let (diagram, node, port, other, other_node) = (
        id(model, "architecture"),
        id(model, "actor_view"),
        id(model, "telemetry"),
        id(model, "review"),
        id(model, "review_view"),
    );
    assert!(
        serde_json::to_value(&model.diagrams[&diagram].nodes[&node])
            .unwrap()
            .get("port_anchors")
            .is_none()
    );
    let commands = json!([
        {"SetPortAnchor":{"diagram":diagram,"node":node,"anchor":{"port":port,"side":"Top","offset":0.25}}},
        {"SetPortAnchor":{"diagram":other,"node":other_node,"anchor":{"port":port,"side":"Left","offset":0.75}}}
    ]);
    let expected = oa_core::execute_batch(
        model,
        &serde_json::from_value::<Vec<Command>>(commands.clone()).unwrap(),
    )
    .unwrap();
    let preview = transact(&server, &original, commands.clone(), true).await;
    assert_eq!(preview.status(), StatusCode::OK);
    let preview: Value = preview.json().await.unwrap();
    assert_eq!(
        serde_json::from_value::<Project>(preview["model"].clone()).unwrap(),
        expected
    );
    let proposed: SourceBundle = serde_json::from_value(preview["source_project"].clone()).unwrap();
    assert_eq!(
        compile_bundle(&proposed, ProjectLimits::default())
            .unwrap()
            .decoded
            .project,
        expected
    );
    assert_eq!(
        server.get(original.resource_id).await.source_project,
        original.source_project
    );

    let response = transact(&server, &original, commands.clone(), false).await;
    assert_eq!(response.status(), StatusCode::OK);
    let mut current = server.get(original.resource_id).await;
    assert_eq!(current.revision, original.revision + 1);
    assert_eq!(current.model, expected);
    assert_eq!(current.model.elements, original.model.elements);
    assert_pair(&current);
    for path in ["project.arcadia", "participants.arcadia"] {
        assert_eq!(
            current.source_project.files[path],
            original.source_project.files[path]
        );
    }
    assert!(current.source_project.files["views.arcadia"].contains("// Placement rationale"));
    let no_op = transact(&server, &current, commands.clone(), false).await;
    assert_eq!(no_op.headers()["etag"], current.etag());
    assert_eq!(no_op.json::<Value>().await.unwrap()["changed"], false);
    assert_eq!(
        transact(&server, &original, commands, false).await.status(),
        StatusCode::PRECONDITION_FAILED
    );

    // Source editing changes exactly the same accepted presentation record.
    let mut edited = current.source_project.clone();
    let source = edited.files.get_mut("views.arcadia").unwrap();
    assert!(source.contains("offset 0.25;"));
    *source = source.replace("offset 0.25;", "offset 0.375;");
    let written = server
        .client
        .put(server.url(&format!("/projects/{}/source-project", current.resource_id)))
        .header("if-match", current.etag())
        .json(&edited)
        .send()
        .await
        .unwrap();
    assert_eq!(
        written.status(),
        StatusCode::OK,
        "{}",
        written.text().await.unwrap()
    );
    current = server.get(current.resource_id).await;
    assert_eq!(
        current.model.diagrams[&diagram].nodes[&node].port_anchors[0].offset,
        0.375
    );
    assert_eq!(current.model.diagrams[&other], expected.diagrams[&other]);
    assert_eq!(current.source_project, edited);
    assert_pair(&current);

    let source = server
        .client
        .get(server.url(&format!("/projects/{}/source", current.resource_id)))
        .send()
        .await
        .unwrap()
        .text()
        .await
        .unwrap();
    assert_eq!(oa_core::language::parse(&source).unwrap(), current.model);
    server.stop().await;
    let server = TestServer::start(directory.path(), None).await;
    let reopened = server.get(current.resource_id).await;
    assert_eq!(
        serde_json::to_value(&reopened).unwrap(),
        serde_json::to_value(&current).unwrap()
    );
    let reset = json!([{"RemovePortAnchor":{"diagram":diagram,"node":node,"port":port}}]);
    assert_eq!(
        transact(&server, &reopened, reset.clone(), false)
            .await
            .status(),
        StatusCode::OK
    );
    let reset_state = server.get(current.resource_id).await;
    assert!(
        reset_state.model.diagrams[&diagram].nodes[&node]
            .port_anchors
            .is_empty()
    );
    assert_eq!(
        reset_state.model.diagrams[&other],
        current.model.diagrams[&other]
    );
    assert_pair(&reset_state);
    let again = transact(&server, &reset_state, reset, false).await;
    assert_eq!(again.headers()["etag"], reset_state.etag());
    assert_eq!(again.json::<Value>().await.unwrap()["changed"], false);
    server.stop().await;
}

#[tokio::test]
async fn port_anchor_http_rejects_invalid_records_and_stale_owners_atomically() {
    let directory = tempfile::tempdir().unwrap();
    let server = TestServer::start(directory.path(), None).await;
    let original = import(&server).await;
    let model = &original.model;
    let (diagram, node, port, actor, system, inbound) = (
        id(model, "architecture"),
        id(model, "actor_view"),
        id(model, "telemetry"),
        id(model, "vessel"),
        id(model, "system"),
        id(model, "inbound"),
    );
    let anchor = json!({"port":port,"side":"Bottom","offset":1});
    assert_eq!(
        transact(
            &server,
            &original,
            json!([{"SetPortAnchor":{"diagram":diagram,"node":node,"anchor":anchor}}]),
            false
        )
        .await
        .status(),
        StatusCode::OK
    );
    let current = server.get(original.resource_id).await;
    for (bad, status) in [
        (
            json!({"port":port,"side":"Top","offset":-0.01}),
            StatusCode::UNPROCESSABLE_ENTITY,
        ),
        (
            json!({"port":port,"side":"Top","offset":1.01}),
            StatusCode::UNPROCESSABLE_ENTITY,
        ),
        (
            json!({"port":inbound,"side":"Top","offset":0.5}),
            StatusCode::UNPROCESSABLE_ENTITY,
        ),
        (
            json!({"port":actor,"side":"Top","offset":0.5}),
            StatusCode::UNPROCESSABLE_ENTITY,
        ),
        (
            json!({"port":Id::new_v4(),"side":"Top","offset":0.5}),
            StatusCode::UNPROCESSABLE_ENTITY,
        ),
        (
            json!({"port":port,"side":"Diagonal","offset":0.5}),
            StatusCode::BAD_REQUEST,
        ),
        (json!({"port":port,"side":"Top"}), StatusCode::BAD_REQUEST),
        (
            json!({"port":port,"side":"Top","offset":null}),
            StatusCode::BAD_REQUEST,
        ),
        (
            json!({"port":port,"side":"Top","offset":0.5,"unknown":true}),
            StatusCode::BAD_REQUEST,
        ),
    ] {
        let response = transact(
            &server,
            &current,
            json!([
                Command::Rename(actor, "Must roll back".into()),
                {"SetPortAnchor":{"diagram":diagram,"node":node,"anchor":bad}}
            ]),
            false,
        )
        .await;
        assert_eq!(
            response.status(),
            status,
            "{bad}: {}",
            response.text().await.unwrap()
        );
    }
    let mut duplicate = current.model.clone();
    let anchors = &mut duplicate
        .diagrams
        .get_mut(&diagram)
        .unwrap()
        .nodes
        .get_mut(&node)
        .unwrap()
        .port_anchors;
    anchors.push(anchors[0].clone());
    let rejected = server
        .client
        .put(server.url(&format!("/projects/{}/model", current.resource_id)))
        .header("if-match", current.etag())
        .json(&duplicate)
        .send()
        .await
        .unwrap();
    assert_eq!(rejected.status(), StatusCode::UNPROCESSABLE_ENTITY);
    let reparent = Command::Reparent {
        element: port,
        parent: Some(system),
    };
    assert_eq!(
        transact(&server, &current, json!([reparent]), false)
            .await
            .status(),
        StatusCode::UNPROCESSABLE_ENTITY
    );
    assert_eq!(
        transact(
            &server,
            &current,
            json!([{"RemovePortAnchor":{"diagram":diagram,"node":node,"port":inbound}}]),
            false
        )
        .await
        .status(),
        StatusCode::UNPROCESSABLE_ENTITY
    );
    assert_eq!(
        serde_json::to_value(server.get(current.resource_id).await).unwrap(),
        serde_json::to_value(&current).unwrap()
    );
    let remove = json!({"RemovePortAnchor":{"diagram":diagram,"node":node,"port":port}});
    assert_eq!(
        transact(&server, &current, json!([remove, reparent]), false)
            .await
            .status(),
        StatusCode::OK
    );
    let moved = server.get(current.resource_id).await;
    assert_eq!(moved.model.elements[&port].parent, Some(system));
    assert!(
        moved.model.diagrams[&diagram].nodes[&node]
            .port_anchors
            .is_empty()
    );
    assert_pair(&moved);
    assert_eq!(
        transact(&server, &moved, json!([remove]), false)
            .await
            .status(),
        StatusCode::UNPROCESSABLE_ENTITY
    );
    server.stop().await;
}

#[tokio::test]
async fn port_anchor_served_openapi_matches_serialized_records_and_commands() {
    let directory = tempfile::tempdir().unwrap();
    let server = TestServer::start(directory.path(), None).await;
    let spec: Value = server
        .client
        .get(server.url("/openapi.json"))
        .send()
        .await
        .unwrap()
        .json()
        .await
        .unwrap();
    let schemas = &spec["components"]["schemas"];
    assert_eq!(
        schemas["PortAnchorSide"]["enum"],
        json!(["Left", "Right", "Top", "Bottom"])
    );
    assert_eq!(
        schemas["PortAnchor"]["required"],
        json!(["port", "side", "offset"])
    );
    assert_eq!(schemas["PortAnchor"]["additionalProperties"], false);
    assert_eq!(schemas["PortAnchor"]["properties"]["offset"]["minimum"], 0);
    assert_eq!(schemas["PortAnchor"]["properties"]["offset"]["maximum"], 1);
    assert_eq!(
        schemas["NodePlacement"]["properties"]["port_anchors"]["default"],
        json!([])
    );
    assert!(
        !schemas["NodePlacement"]["required"]
            .as_array()
            .unwrap()
            .contains(&json!("port_anchors"))
    );
    let anchor = oa_core::PortAnchor {
        port: Id::new_v4(),
        side: oa_core::PortAnchorSide::Right,
        offset: 0.5,
    };
    assert_eq!(
        serde_json::to_value(&anchor).unwrap(),
        json!({"port":anchor.port,"side":"Right","offset":0.5})
    );
    for (command, name, fields) in [
        (
            Command::SetPortAnchor {
                diagram: Id::new_v4(),
                node: Id::new_v4(),
                anchor: anchor.clone(),
            },
            "SetPortAnchor",
            json!(["diagram", "node", "anchor"]),
        ),
        (
            Command::RemovePortAnchor {
                diagram: Id::new_v4(),
                node: Id::new_v4(),
                port: anchor.port,
            },
            "RemovePortAnchor",
            json!(["diagram", "node", "port"]),
        ),
    ] {
        let record = serde_json::to_value(&command).unwrap();
        assert_eq!(
            serde_json::from_value::<Command>(record.clone()).unwrap(),
            command
        );
        let schema = schemas["Command"]["oneOf"]
            .as_array()
            .unwrap()
            .iter()
            .find(|entry| entry["properties"].get(name).is_some())
            .unwrap();
        assert_eq!(schema["required"], json!([name]));
        assert_eq!(schema["properties"][name]["required"], fields);
        assert_eq!(schema["properties"][name]["additionalProperties"], false);
        for field in fields.as_array().unwrap() {
            assert!(record[name].get(field.as_str().unwrap()).is_some());
        }
    }
    server.stop().await;
}