import assert from "node:assert/strict";
import * as vscode from "vscode";
import { control, spawnCounter, startImage } from "./server";
import { BehaviorTree, SourceDocuments } from "../src/behaviors";
import { ImageClient } from "../src/client";

export async function run(): Promise<void> {
  const image = await startImage();
  try {
    await vscode.commands.executeCommand("runa.connect", image.address);
    await browseBehaviors(image.address);
    const spawned = await vscode.commands.executeCommand<unknown>("runa.spawn", {
      behavior: "counter",
      state: "5",
    });
    assert.equal(typeof spawned, "string");
    const selection = { actor_ref: String(spawned) };
    await vscode.commands.executeCommand("runa.inspect", selection);
    const controlled = vscode.window.activeTextEditor?.document;
    assert.ok(controlled);
    await vscode.commands.executeCommand("runa.send", selection, '{"op":"add","value":7}');
    const controlPaused = documentChanged(controlled, (text) =>
      text.includes('"status": "paused"'),
    );
    await vscode.commands.executeCommand("runa.pause", selection);
    await vscode.commands.executeCommand("runa.tick", 100);
    await controlPaused;
    let snapshot = JSON.parse(controlled.getText()).actor;
    assert.equal(snapshot.status.status, "paused");
    assert.equal(snapshot.state.data, 5);
    assert.equal(snapshot.queued.length, 1);
    const controlExecuted = documentChanged(
      controlled,
      (text) => JSON.parse(text).actor.state.data === 12,
    );
    await vscode.commands.executeCommand("runa.resume", selection);
    await vscode.commands.executeCommand("runa.tick", 100);
    await controlExecuted;
    snapshot = JSON.parse(controlled.getText()).actor;
    assert.equal(snapshot.state.data, 12);
    assert.equal(snapshot.queued.length, 0);
    const controlStopped = documentChanged(controlled, (text) =>
      text.includes('"status": "stopped"'),
    );
    await vscode.commands.executeCommand("runa.stop", selection);
    await controlStopped;
    assert.equal(JSON.parse(controlled.getText()).actor.status.status, "stopped");
    const controlRestarted = documentChanged(
      controlled,
      (text) => JSON.parse(text).actor.incarnation === 2,
    );
    await vscode.commands.executeCommand("runa.restart", selection);
    await controlRestarted;
    snapshot = JSON.parse(controlled.getText()).actor;
    assert.equal(snapshot.incarnation, 2);
    assert.equal(snapshot.state.data, 12);
    const actorRef = await spawnCounter(image.address);
    await vscode.commands.executeCommand("runa.connect", image.address);
    await vscode.commands.executeCommand("runa.refresh");
    await vscode.commands.executeCommand("runa.inspect", { actor_ref: actorRef });
    let document = vscode.window.activeTextEditor?.document;
    assert.ok(document);
    assert.equal(document.uri.scheme, "runa");
    assert.equal(document.languageId, "json");
    assert.match(document.getText(), /9223372036854775807/);
    assert.match(document.getText(), /"connected": true/);
    const firstUri = document.uri.toString();
    const refreshed = documentChanged(document, (text) =>
      text.includes("queued from another client"),
    );
    assert.deepEqual(
      await control(image.address, {
        operation: "send",
        parameters: {
          actor_ref: actorRef,
          message: { type: "string", data: "queued from another client" },
        },
      }),
      { version: 3, request_id: "integration-control", result: { Ok: { kind: "acknowledged" } } },
    );
    await refreshed;
    assert.match(document.getText(), /queued from another client/);
    const paused = documentChanged(document, (text) => text.includes('"status": "paused"'));
    await control(image.address, { operation: "pause_actor", parameters: { actor_ref: actorRef } });
    await paused;
    const failed = documentChanged(document, (text) => text.includes('"status": "failed"'));
    await control(image.address, {
      operation: "resume_actor",
      parameters: { actor_ref: actorRef },
    });
    await control(image.address, {
      operation: "tick",
      parameters: { ticks: 100, instruction_budget: 10 },
    });
    await failed;
    const disconnected = documentChanged(document, (text) => text.includes('"connected": false'));
    await vscode.commands.executeCommand("runa.disconnect");
    await disconnected;
    assert.match(document.getText(), /"connected": false/);
    await vscode.commands.executeCommand("runa.connect", image.address);
    await vscode.commands.executeCommand("runa.inspect", { actor_ref: actorRef });
    document = vscode.window.activeTextEditor?.document;
    assert.ok(document);
    assert.notEqual(document.uri.toString(), firstUri);
    assert.match(document.getText(), /queued from another client/);
    const old = await vscode.workspace.openTextDocument(vscode.Uri.parse(firstUri));
    assert.match(old.getText(), /"connected": false/);
    console.log(
      "Runa extension host: spawn, send, lifecycle, ticks, inspection, automatic refresh, reconnect passed",
    );
  } finally {
    await vscode.commands.executeCommand("runa.disconnect");
    await image.stop();
  }
}

async function browseBehaviors(address: string): Promise<void> {
  const client = await ImageClient.connect(address, (error) => assert.equal(error, undefined));
  const tree = new BehaviorTree();
  const sources = new SourceDocuments();
  try {
    const source = await client.behaviorSource("counter", 1n);
    await control(address, {
      operation: "publish_behavior",
      parameters: {
        name: "browse-test",
        expected_revision: null,
        source,
      },
    });
    const listing = await client.behaviors();
    tree.replace(listing);
    const behavior = tree.getChildren().find((node) => node.name === "browse-test");
    assert.ok(behavior);
    assert.equal(
      tree.getTreeItem(behavior).collapsibleState,
      vscode.TreeItemCollapsibleState.Collapsed,
    );
    const version = tree.getChildren(behavior)[0];
    assert.ok(version);
    assert.equal(tree.getTreeItem(version).description, "current");
    assert.deepEqual(tree.getChildren(version), []);
    const item = tree.getTreeItem(behavior);
    const opened = await vscode.commands.executeCommand<string>(
      "runa.openBehaviorSource",
      ...item.command!.arguments!,
    );
    assert.ok(opened);
    const original = vscode.window.activeTextEditor?.document;
    assert.ok(original);
    assert.equal(original.uri.scheme, "runa-source");
    assert.match(original.uri.path, /\/1\.rn$/);
    assert.equal(original.getText(), source);
    const originalText = original.getText();
    await vscode.commands.executeCommand("type", { text: "// cannot edit\n" });
    assert.equal(original.getText(), originalText);
    const newerSource = "pub fn handle(state, message) { (state + 2, []) }\n";
    await control(address, {
      operation: "publish_behavior",
      parameters: {
        name: "browse-test",
        expected_revision: 1,
        source: newerSource,
      },
    });
    await vscode.commands.executeCommand("runa.refresh");
    // Context-menu arguments are raw tree nodes, unlike item command arguments.
    const updated = (await client.behaviors()).find((node) => node.name === "browse-test");
    assert.ok(updated);
    tree.replace([updated]);
    assert.deepEqual(
      tree.getChildren(updated).map((node) => node.revision),
      [2n, 1n],
    );
    await vscode.commands.executeCommand("runa.openBehaviorSource", updated);
    const newer = vscode.window.activeTextEditor?.document;
    assert.ok(newer);
    assert.equal(newer.getText(), newerSource);
    assert.notEqual(newer.uri.toString(), original.uri.toString());
    assert.equal(original.getText(), originalText);
    const uri = sources.set(1, "name/with?#% spaces", 1n, originalText);
    assert.equal(sources.provideTextDocumentContent(uri), originalText);
    assert.notEqual(
      sources.set(2, "name/with?#% spaces", 1n, newerSource).toString(),
      uri.toString(),
    );
    assert.throws(() => sources.set(1, "name/with?#% spaces", 1n, newerSource), /Immutable/);
    sources.remove(uri);
    assert.throws(() => sources.provideTextDocumentContent(uri), /no longer cached/);
    await vscode.commands.executeCommand("runa.disconnect");
    assert.equal(original.getText(), originalText);
    await vscode.commands.executeCommand("runa.connect", address);
    await vscode.commands.executeCommand("runa.openBehaviorSource", {
      name: "browse-test",
      revision: "1",
    });
    const reconnected = vscode.window.activeTextEditor?.document;
    assert.ok(reconnected);
    assert.equal(reconnected.getText(), originalText);
    assert.notEqual(reconnected.uri.toString(), original.uri.toString());
    console.log(
      "Runa behavior browsing: revision tree, immutable source, read-only documents, session isolation passed",
    );
  } finally {
    client.close();
    tree.dispose();
    sources.dispose();
  }
}

function documentChanged(
  document: vscode.TextDocument,
  expected: (text: string) => boolean,
): Promise<void> {
  return new Promise((resolve, reject) => {
    const subscription = vscode.workspace.onDidChangeTextDocument((event) => {
      if (
        event.document.uri.toString() === document.uri.toString() &&
        expected(event.document.getText())
      ) {
        clearTimeout(timeout);
        subscription.dispose();
        resolve();
      }
    });
    const timeout = setTimeout(() => {
      subscription.dispose();
      reject(new Error("Actor inspector did not refresh"));
    }, 5000);
  });
}