import { EnvironmentId, ProjectId, WS_METHODS, type PullRequestStack } from "@t3tools/contracts";import { expect, it } from "@effect/vitest";import * as Data from "effect/Data";import * as Effect from "effect/Effect";import * as Latch from "effect/Latch";import * as Layer from "effect/Layer";import * as Option from "effect/Option";import * as PubSub from "effect/PubSub";import * as Stream from "effect/Stream";import * as SubscriptionRef from "effect/SubscriptionRef";import { AsyncResult, Atom, AtomRegistry } from "effect/unstable/reactivity"; import {  AVAILABLE_CONNECTION_STATE,  PrimaryConnectionTarget,  type PreparedConnection,  type SupervisorConnectionState,} from "../connection/model.ts";import * as EnvironmentRegistry from "../connection/registry.ts";import * as EnvironmentSupervisor from "../connection/supervisor.ts";import type { WsRpcProtocolClient } from "../rpc/protocol.ts";import type { RpcSession } from "../rpc/session.ts";import {  createPullRequestEnvironmentAtoms,  createPullRequestStackAtomFamily,} from "./pullRequests.ts";import { PullRequestDiffLoader } from "./pullRequestDiffHttp.ts";import { executeAtomQuery } from "./runtime.ts"; class MutationRefused extends Data.TaggedError("MutationRefused") {} const TARGET = new PrimaryConnectionTarget({  environmentId: EnvironmentId.make("environment-1"),  label: "Test environment",  httpBaseUrl: "https://environment.example.test",  wsBaseUrl: "wss://environment.example.test",}); function session(client: WsRpcProtocolClient): RpcSession {  return {    client,    initialConfig: Effect.never,    subscribeServerConfig: (input) => client.subscribeServerConfig(input),    ready: Effect.void,    probe: Effect.void,    closed: Effect.never,  };} const makeTestRuntime = Effect.fn("makeTestRuntime")(function* (client: WsRpcProtocolClient) {  const connectionState: SupervisorConnectionState = {    ...AVAILABLE_CONNECTION_STATE,    desired: true,    network: "online",    phase: "connected",    attempt: 1,    generation: 1,  };  const supervisor = EnvironmentSupervisor.EnvironmentSupervisor.of({    target: TARGET,    state: yield* SubscriptionRef.make(connectionState),    session: yield* SubscriptionRef.make(Option.some(session(client))),    prepared: yield* SubscriptionRef.make(Option.none<PreparedConnection>()),    connect: Effect.void,    disconnect: Effect.void,    retryNow: Effect.void,  } satisfies EnvironmentSupervisor.EnvironmentSupervisor["Service"]);  const environmentRegistry = EnvironmentRegistry.EnvironmentRegistry.of({    run: (_environmentId, effect) =>      Effect.provideService(effect, EnvironmentSupervisor.EnvironmentSupervisor, supervisor),    runStream: (_environmentId, stream) =>      Stream.provideService(stream, EnvironmentSupervisor.EnvironmentSupervisor, supervisor),    followStream: (_environmentId, stream) =>      Stream.provideService(stream, EnvironmentSupervisor.EnvironmentSupervisor, supervisor),  } as EnvironmentRegistry.EnvironmentRegistry["Service"]);  const runtime = Atom.runtime(    Layer.merge(      Layer.succeed(EnvironmentRegistry.EnvironmentRegistry, environmentRegistry),      Layer.succeed(        PullRequestDiffLoader,        PullRequestDiffLoader.of({ load: () => Effect.die("unused") }),      ),    ),  );  const atoms = createPullRequestEnvironmentAtoms(runtime);  const registry = yield* Effect.acquireRelease(Effect.sync(AtomRegistry.make), (registry) =>    Effect.sync(() => registry.dispose()),  );  return { runtime, atoms, registry };}); it.effect("keeps concurrent diff file reads on different hosts separate", () =>  Effect.scoped(    Effect.gen(function* () {      const release = yield* Latch.make();      const started = yield* Latch.make();      const calls: string[] = [];      const client = {        [WS_METHODS.pullRequestsDiffFileContents]: (input: { readonly host: string }) =>          Effect.gen(function* () {            calls.push(input.host);            yield* started.open;            yield* release.await;            return { oldContents: "", newContents: input.host };          }),      } as unknown as WsRpcProtocolClient;      const { atoms, registry } = yield* makeTestRuntime(client);      const input = {        projectId: ProjectId.make("project-1"),        repository: "acme/web",        number: 1,        changeType: "change",        oldPath: "src/app.ts",        newPath: "src/app.ts",      } as const;      const first = atoms.diffFileContents.run(registry, {        environmentId: TARGET.environmentId,        input: { ...input, host: "github.com" },      });      yield* started.await;      const second = atoms.diffFileContents.run(registry, {        environmentId: TARGET.environmentId,        input: { ...input, host: "github.example.com" },      });      yield* release.open;       const results = yield* Effect.promise(() => Promise.all([first, second]));      expect(results).toMatchObject([        { _tag: "Success", value: { newContents: "github.com" } },        { _tag: "Success", value: { newContents: "github.example.com" } },      ]);      expect(calls).toEqual(["github.com", "github.example.com"]);    }),  ),); it.effect("refreshes pull request activity after a comment is updated", () =>  Effect.scoped(    Effect.gen(function* () {      const refreshEvents = yield* PubSub.unbounded<number>();      let commentBody = "old comment";      const client = {        [WS_METHODS.pullRequestsSubscribeRefreshes]: () => Stream.fromPubSub(refreshEvents),        [WS_METHODS.pullRequestsActivity]: () =>          Effect.succeed({            author: null,            reviewers: [],            comments: [              {                id: "comment-1",                kind: "issue-comment",                author: null,                body: commentBody,                createdAt: "2026-08-24T00:00:00Z",                url: null,                path: null,                reviewState: null,                reactions: [],              },            ],            commentCount: 1,            commentsTruncated: false,            reviewThreads: [],            commits: [],            reactions: [],          }),        [WS_METHODS.pullRequestsUpdateComment]: (input: { readonly body: string }) =>          Effect.sync(() => {            commentBody = input.body;          }),      } as unknown as WsRpcProtocolClient;      const { atoms, registry } = yield* makeTestRuntime(client);      const reference = {        projectId: ProjectId.make("project-1"),        host: "github.example.com",        repository: "acme/web",        number: 1,      } as const;      const activity = atoms.activity({ environmentId: TARGET.environmentId, input: reference });      const unmount = registry.mount(activity);      yield* Effect.addFinalizer(() => Effect.sync(unmount));       const initial = yield* Effect.promise(() => executeAtomQuery(registry, activity));      expect(AsyncResult.isSuccess(initial)).toBe(true);      if (!AsyncResult.isSuccess(initial)) {        return yield* Effect.die("activity did not load");      }      expect(initial.value.comments[0]?.body).toBe("old comment");       const update = yield* Effect.promise(() =>        atoms.updateComment.run(registry, {          environmentId: TARGET.environmentId,          input: { ...reference, commentId: "comment-1", kind: "issue-comment", body: "updated" },        }),      );       expect(AsyncResult.isSuccess(update)).toBe(true);      expect(        (yield* AtomRegistry.getResult(registry, activity, { suspendOnWaiting: true })).comments[0]          ?.body,      ).toBe("updated");      const refreshed = Latch.makeUnsafe();      const stop = registry.subscribe(activity, (result) => {        if (AsyncResult.isSuccess(result) && result.value.comments[0]?.body === "after turn") {          refreshed.openUnsafe();        }      });      yield* Effect.addFinalizer(() => Effect.sync(stop));       commentBody = "after turn";      yield* PubSub.publish(refreshEvents, 1);      yield* refreshed.await;       expect(        (yield* AtomRegistry.getResult(registry, activity, { suspendOnWaiting: true })).comments[0]          ?.body,      ).toBe("after turn");    }),  ),); it.effect("updates cached labels after successful edits without rereading the host", () =>  Effect.scoped(    Effect.gen(function* () {      let detailReads = 0;      let candidateReads = 0;      let refuse = false;      let failDetail = false;      const existing = { name: "existing", color: "111111" };      const addedLabel = { name: "new", color: "abcdef" };      const detailRefreshStarted = yield* Latch.make();      const releaseDetailRefresh = yield* Latch.make();      const client = {        [WS_METHODS.pullRequestsSubscribeRefreshes]: () => Stream.never,        [WS_METHODS.pullRequestsDetail]: () =>          Effect.gen(function* () {            detailReads++;            if (failDetail) {              yield* detailRefreshStarted.open;              yield* releaseDetailRefresh.await;              return yield* Effect.fail(new MutationRefused());            }            return { title: "keep this title", labels: [existing] };          }),        [WS_METHODS.pullRequestsLabelCandidates]: () =>          Effect.sync(() => {            candidateReads++;            return {              candidates: [                { ...existing, description: null, isApplied: true },                { ...addedLabel, description: "description", isApplied: false },              ],              truncated: false,            };          }),        [WS_METHODS.pullRequestsSetLabels]: () =>          refuse ? Effect.fail(new MutationRefused()) : Effect.void,      } as unknown as WsRpcProtocolClient;      const { atoms, registry } = yield* makeTestRuntime(client);      const target = {        environmentId: TARGET.environmentId,        input: {          projectId: ProjectId.make("project-1"),          repository: "acme/web",          number: 1,          host: "github.example.com",        },      };      const detail = atoms.detail(target);      const candidates = atoms.labelCandidates(target);      registry.mount(detail);      const unmountCandidates = registry.mount(candidates);      yield* AtomRegistry.getResult(registry, detail, { suspendOnWaiting: true });      yield* AtomRegistry.getResult(registry, candidates, { suspendOnWaiting: true });       const added = yield* Effect.promise(() =>        atoms.setLabels.run(registry, {          ...target,          input: {            host: target.input.host,            projectId: target.input.projectId,            repository: target.input.repository,            number: target.input.number,            labels: ["new"],            applied: true,          },        }),      );      expect(AsyncResult.isSuccess(added)).toBe(true);      expect(yield* AtomRegistry.getResult(registry, detail)).toEqual({        title: "keep this title",        labels: [existing, addedLabel],      });      unmountCandidates();      registry.mount(atoms.labelCandidates(target));      expect((yield* AtomRegistry.getResult(registry, candidates)).candidates[1]).toEqual({        ...addedLabel,        description: "description",        isApplied: true,      });       for (const name of ["existing", "new"]) {        refuse = name === "new";        const result = yield* Effect.promise(() =>          atoms.setLabels.run(registry, {            ...target,            input: { ...target.input, labels: [name], applied: false },          }),        );        expect(result._tag).toBe(refuse ? "Failure" : "Success");        expect((yield* AtomRegistry.getResult(registry, detail)).labels).toEqual([addedLabel]);        expect((yield* AtomRegistry.getResult(registry, candidates)).candidates).toMatchObject([          { name: "existing", isApplied: false },          { name: "new", isApplied: true },        ]);      }      expect(detailReads).toBe(1);      expect(candidateReads).toBe(1);       failDetail = true;      registry.refresh(detail);      yield* detailRefreshStarted.await;      expect(registry.get(detail).waiting).toBe(true);      expect(Option.getOrThrow(AsyncResult.value(registry.get(detail))).labels).toEqual([        addedLabel,      ]);      yield* releaseDetailRefresh.open;      yield* Effect.exit(AtomRegistry.getResult(registry, detail, { suspendOnWaiting: true }));      expect(AsyncResult.isFailure(registry.get(detail))).toBe(true);      expect(Option.getOrThrow(AsyncResult.value(registry.get(detail))).labels).toEqual([        addedLabel,      ]);      failDetail = false;      registry.refresh(detail);      expect(        (yield* AtomRegistry.getResult(registry, detail, { suspendOnWaiting: true })).labels,      ).toEqual([existing]);      expect(detailReads).toBe(3);    }),  ),); it.effect("updates reviewer requests and enriched reviewers without rereading the host", () =>  Effect.scoped(    Effect.gen(function* () {      let reads = 0;      let refuse = false;      const actor = { login: "reviewer", name: "Reviewer", avatarUrl: null };      const hostActor = { ...actor, login: "Reviewer" };      let hostRequested = false;      let reviewed = false;      let pauseActivity = false;      const activityStarted = yield* Latch.make();      const client = {        [WS_METHODS.pullRequestsSubscribeRefreshes]: () => Stream.never,        [WS_METHODS.pullRequestsDetail]: () =>          Effect.sync(() => {            reads++;            return { reviewers: hostRequested ? [hostActor] : [] };          }),        [WS_METHODS.pullRequestsActivity]: () =>          Effect.gen(function* () {            reads++;            if (pauseActivity) {              pauseActivity = false;              yield* activityStarted.open;              return yield* Effect.never;            }            return {              reviewers: hostRequested ? [hostActor] : [],              comments: reviewed ? [{ kind: "review-comment", author: hostActor }] : [],            };          }),        [WS_METHODS.pullRequestsReviewerCandidates]: (input: { number: number }) =>          input.number === 2            ? Effect.never            : Effect.sync(() => {                reads++;                return {                  candidates: [{ ...actor, id: "12", kind: "user", isRequested: false }],                  truncated: false,                };              }),        [WS_METHODS.pullRequestsRequestReviewers]: (input: { requested: boolean }) =>          refuse            ? Effect.fail(new MutationRefused())            : Effect.sync(() => {                hostRequested = input.requested;              }),      } as unknown as WsRpcProtocolClient;      const { atoms, registry } = yield* makeTestRuntime(client);      const target = {        environmentId: TARGET.environmentId,        input: {          projectId: ProjectId.make("project-1"),          repository: "acme/web",          number: 1,          host: "github.example.com",        },      };      const detail = atoms.detail(target);      const activity = atoms.activity(target);      const candidates = atoms.reviewerCandidates(target);      registry.mount(detail);      registry.mount(activity);      registry.mount(candidates);      yield* AtomRegistry.getResult(registry, detail, { suspendOnWaiting: true });      yield* AtomRegistry.getResult(registry, activity, { suspendOnWaiting: true });      yield* AtomRegistry.getResult(registry, candidates, { suspendOnWaiting: true });      const request = (requested: boolean, reference = target) =>        Effect.promise(() =>          atoms.requestReviewers.run(registry, {            ...reference,            input: { ...reference.input, reviewers: [{ id: "12", kind: "user" }], requested },          }),        );      for (const operation of ["request", "refuse", "remove"]) {        refuse = operation === "refuse";        expect((yield* request(operation === "request"))._tag).toBe(refuse ? "Failure" : "Success");        const expected = operation === "remove" ? [] : [actor];        expect((yield* AtomRegistry.getResult(registry, detail)).reviewers).toEqual(expected);        expect((yield* AtomRegistry.getResult(registry, activity)).reviewers).toEqual(expected);        expect((yield* AtomRegistry.getResult(registry, candidates)).candidates).toMatchObject([          { isRequested: operation !== "remove" },        ]);      }      expect(reads).toBe(3);      // A slow activity read started before the write must not hide the new request.      pauseActivity = true;      registry.refresh(activity);      yield* activityStarted.await;      expect(AsyncResult.isSuccess(yield* request(true))).toBe(true);      expect(        (yield* AtomRegistry.getResult(registry, activity, { suspendOnWaiting: true })).reviewers,      ).toEqual([hostActor]);      expect(reads).toBe(5);      expect(AsyncResult.isSuccess(yield* request(false))).toBe(true);      expect((yield* AtomRegistry.getResult(registry, activity)).reviewers).toEqual([]);       reviewed = true;      yield* request(true);      registry.refresh(activity);      yield* AtomRegistry.getResult(registry, activity, { suspendOnWaiting: true });      yield* request(false);      expect((yield* AtomRegistry.getResult(registry, activity)).reviewers).toEqual([hostActor]);       // A caller without an open picker still needs authoritative reviewer identities.      const otherTarget = { ...target, input: { ...target.input, number: 2 } };      const otherDetail = atoms.detail(otherTarget);      registry.mount(otherDetail);      yield* AtomRegistry.getResult(registry, otherDetail, { suspendOnWaiting: true });      yield* request(true, otherTarget);      expect(        (yield* AtomRegistry.getResult(registry, otherDetail, { suspendOnWaiting: true }))          .reviewers,      ).toEqual([hostActor]);    }),  ),); it.effect("refreshes stack state after reopening and head SHAs after a turn", () =>  Effect.scoped(    Effect.gen(function* () {      const refreshEvents = yield* PubSub.unbounded<number>();      let state: "closed" | "open" = "closed";      let headSha = "old-head";      const client = {        [WS_METHODS.pullRequestsSubscribeRefreshes]: () => Stream.fromPubSub(refreshEvents),        [WS_METHODS.pullRequestsStack]: () =>          Effect.sync(            () =>              ({                id: "stack-1",                number: 1,                url: "https://github.com/acme/web/pull/1",                base: "main",                layers: [                  {                    number: 1,                    headBranch: "feature",                    headSha,                    state,                    isDraft: false,                  },                ],              }) satisfies PullRequestStack,          ),      } as unknown as WsRpcProtocolClient;      const { runtime, registry } = yield* makeTestRuntime(client);      const stacks = createPullRequestStackAtomFamily(runtime);      const stack = stacks({        environmentId: TARGET.environmentId,        input: {          projectId: ProjectId.make("project-1"),          repository: "acme/web",          number: 1,        },      });      const unmount = registry.mount(stack);      yield* Effect.addFinalizer(() => Effect.sync(unmount));

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