import assert from "node:assert/strict";
import test from "node:test";
import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { execFile } from "node:child_process";
import { promisify } from "node:util";
import { createRequire } from "node:module";
import { compileCapabilityResourceSource, compileCapabilitySource } from "../src/capability-language/parser.js";
import { generateTypeScriptBindings, generatePackageDescriptor } from "../src/bindings/index.js";
import { genericImplementationType } from "../src/bindings/generics.js";
import { compileWorkspaceRevision, runtimeContracts } from "../src/capability-model/index.js";
import { generateAppliedClientContracts } from "../src/bindings/client.js";
const source = { repository: "https://example.test/generic.git", commit: "a".repeat(40) };
test("generic port aliases retain their defining scope, including shadowed alias names", () => {
  const iface = compileCapabilityResourceSource(
    'type Box<value V> = list<V>; interface Data<value V> id "data" revision "data@1" {value payload id "payload" : Box<V> {get id "payload:get";}}',
    { source },
  );
  assert.ok(iface.ok, JSON.stringify(iface.diagnostics));
  if (iface.resource.kind !== "interface") throw new Error("expected interface");
  const pkg = compileCapabilityResourceSource(
    'import interface Data; type Box<value V> = optional<V>; package P id "p" revision "p@1" {operation fetch<value V> id "data@1" : unit -> list<Box<V>> mode call receiver any requires {interface data id "data" : Data<Box<V>>;};}',
    { source, environment: { interfaces: new Map([["Data", iface.resource.revision]]) } },
  );
  assert.ok(pkg.ok, JSON.stringify(pkg.diagnostics));
  if (pkg.resource.kind !== "package") throw new Error("expected package");
  const generated = generateTypeScriptBindings(
    {
      format: "quixos-bindings",
      version: 1,
      interfaces: [],
      interfaceTemplates: [iface.resource.revision],
      packages: [pkg.resource.revision],
    },
    pkg.resource.revision.revisionId,
  );
  assert.match(generated, /"payload.get":\(\)=>Promise<Array<\(T0 \| null\)>>/);
});
const definition = () => {
  const result = compileCapabilityResourceSource(
    `package Generic id "generic" revision "generic@1" {
    operation echo<value T> id "echo" : T -> T mode call receiver any;
  }`,
    { source },
  );
  assert.ok(result.ok, JSON.stringify(result.diagnostics));
  if (result.resource.kind !== "package") throw new Error("expected package");
  return result.resource.revision;
};
test("generic package exports specialize per binding without changing immutable source identity", () => {
  const iface = compileCapabilityResourceSource(
    `interface Echo<value T> id "echo-interface" revision "echo-interface@1" {
    operation echo id "echo-member" : T -> T {call id "echo-call";}
  }`,
    { source },
  );
  assert.ok(iface.ok);
  if (iface.resource.kind !== "interface") throw new Error("expected interface");
  const pkg = definition();
  const result = compileCapabilitySource(
    `workspace W id "w" revision "w@1" commit "${source.commit}" {
    import interface Echo; import package Generic; atom Thing id "thing";
    conform Thing as Echo<string> id "string-echo" {bind echo.call to package Generic.echo<string>;}
    conform Thing as Echo<list<int64>> id "list-echo" {bind echo.call to package Generic.echo<list<int64>>;}
  }`,
    "workspace.qx",
    { interfaces: new Map([["Echo", iface.resource.revision]]), packages: new Map([["Generic", pkg]]) },
  );
  assert.ok(result.ok, JSON.stringify(result.diagnostics));
  assert.equal(pkg.exports.length, 0, "source definition was not mutated");
  const closed = result.workspace.packageImports[0];
  assert.equal(closed.revisionId, pkg.revisionId);
  assert.equal(closed.exports.length, 2);
  assert.notEqual(closed.exports[0].id, closed.exports[1].id);
  const oneApplication = structuredClone(result.workspace);
  oneApplication.packageImports[0].exports.splice(1);
  oneApplication.conformances.splice(1);
  assert.notDeepEqual(
    runtimeContracts(oneApplication),
    runtimeContracts(result.workspace),
    "New specializations invalidate the executable contract even with unchanged package source",
  );
  const schema = {
    format: "quixos-bindings" as const,
    version: 1 as const,
    interfaces: result.workspace.interfaceImports,
    packages: [closed],
  };
  const generated = generateTypeScriptBindings(schema, pkg.revisionId);
  assert.match(generated, /"echo":\s*\(<T0>/);
  for (const entry of closed.exports) {
    assert.ok(generated.includes(entry.id));
    assert.ok(generatePackageDescriptor(schema, pkg.revisionId).includes(entry.id));
  }
  const forged = structuredClone(result.workspace);
  forged.packageImports[0].exports[0].outputType = { kind: "scalar", name: "bool" };
  const rejected = compileWorkspaceRevision(forged);
  assert.equal(rejected.ok, false);
  if (!rejected.ok) assert.ok(rejected.issues.some((issue) => issue.message.includes("Specialized export differs")));
});
test("generated universal implementations compile and cannot assume a concrete value type", async () => {
  const pkg = definition();
  const signature = genericImplementationType(pkg.genericExports![0], [], () => {
    throw new Error("unexpected concrete type");
  });
  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-generic-ts-"));
  const require = createRequire(import.meta.url);
  const compiler = path.join(path.dirname(require.resolve("typescript/package.json")), "bin/tsc");
  const run = promisify(execFile);
  const preamble = `type QxObjectRef<T extends string>={readonly identity:T}; type QxContextLifecycle<C>={signal?:AbortSignal}; type Handler=${signature};\n`;
  try {
    const file = path.join(directory, "generic.ts");
    await fs.writeFile(file, preamble + `const handler:Handler=({input})=>input;`);
    await run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]);
    await fs.writeFile(file, preamble + `const handler:Handler=({input})=>"not universally T";`);
    await assert.rejects(
      run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]),
      (error) => {
        assert.match(String((error as { stdout: string }).stdout), /not assignable/);
        return true;
      },
    );
  } finally {
    await fs.rm(directory, { recursive: true, force: true });
  }
});

test("generic Self follows the receiver parameter, never a preceding export", () => {
  const compile = (declaration: string) =>
    compileCapabilityResourceSource(`package P id "p" revision "p@1" {${declaration}}`, { source });
  const valid = compile('operation identity<object T> id "identity" : unit -> ref<Self> mode call receiver object T;');
  assert.ok(valid.ok, JSON.stringify(valid.diagnostics));
  if (valid.resource.kind !== "package") throw new Error("expected package");
  const definition = valid.resource.revision.genericExports![0];
  assert.deepEqual(definition.outputType, {
    kind: "object-ref",
    expectation: { kind: "parameter", parameterId: definition.parameters[0].id },
  });
  assert.equal(compile('function identity<value T> id "identity" : T -> ref<Self>;').ok, false);
  assert.equal(
    compile('operation events<value T> id "events" : unit -> watch-handle mode watch-start receiver any;').ok,
    false,
  );
});

test("typed presentation and factory consumers preserve distinct closed applications and return targets", async () => {
  const interfaces = new Map();
  for (const text of [
    'interface Presentation<value Props> id "presentation" revision "presentation@1" {operation props id "props" : unit -> Props {call id "props:get";}}',
    'interface Factory<object Result> id "factory" revision "factory@1" {operation create id "create" : unit -> ref<Result> {call id "create:call";}}',
  ]) {
    const result = compileCapabilityResourceSource(text, { source });
    assert.ok(result.ok, JSON.stringify(result.diagnostics));
    interfaces.set(result.resource.revision.displayName, result.resource.revision);
  }
  const pkg = compileCapabilityResourceSource(
    `import interface Presentation; import interface Factory;
    external atom Note id "note"; external atom Notebook id "notebook";
    package Views id "views" revision "views@1" {
      operation note id "note-view" : unit -> unit mode call receiver any requires {interface props id "props" : Presentation<record {title:string; note:atom-ref<Note>;}>;};
      operation notebook id "notebook-view" : unit -> unit mode call receiver any requires {interface props id "props" : Presentation<record {count:int32;}>;};
      operation factory id "factory-view" : unit -> unit mode call receiver any requires {interface factory id "factory" : Factory<atom Note>;};
    }`,
    { source, environment: { interfaces } },
  );
  assert.ok(pkg.ok, JSON.stringify(pkg.diagnostics));
  const closed = pkg.resource.specializations!;
  const presentation = closed.find(
    (contract) =>
      contract.application?.definitionId === "presentation@1" && JSON.stringify(contract).includes('"title"'),
  )!;
  const factory = closed.find((contract) => contract.application?.definitionId === "factory@1")!;
  const contracts = generateAppliedClientContracts(closed);
  const directory = await fs.mkdtemp(path.join(os.tmpdir(), "qx-presentation-types-"));
  const compiler = path.join(
    path.dirname(createRequire(import.meta.url).resolve("typescript/package.json")),
    "bin/tsc",
  );
  const run = promisify(execFile);
  const usage = `type Props=CapabilityOutput<${JSON.stringify(presentation.revisionId)},"props:get">;
    type Created=CapabilityOutput<${JSON.stringify(factory.revisionId)},"create:call">;
    const render=({camino,render}:{camino:Props;render:{onSelect:(note:Created)=>void;compact:boolean}})=>{render.onSelect(camino.note);return camino.title;};\n`;
  try {
    const file = path.join(directory, "consumer.ts");
    await fs.writeFile(file, contracts + usage);
    await run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]);
    await fs.writeFile(file, contracts + usage + "const wrong=(props:Props)=>props.count;");
    await assert.rejects(
      run(process.execPath, [compiler, "--ignoreConfig", "--noEmit", "--strict", "--target", "es2023", file]),
      (error) => {
        assert.match(String((error as { stdout: string }).stdout), /count.*does not exist/);
        return true;
      },
    );
  } finally {
    await fs.rm(directory, { recursive: true, force: true });
  }
});