import { OpenCodeSettings, ProviderInstanceId, TextGenerationError } from "@t3tools/contracts";import * as NodeServices from "@effect/platform-node/NodeServices";import { it } from "@effect/vitest";import * as Duration from "effect/Duration";import * as Effect from "effect/Effect";import * as Layer from "effect/Layer";import * as Schema from "effect/Schema";import * as TestClock from "effect/testing/TestClock";import * as NetService from "@t3tools/shared/Net";import { beforeEach, expect } from "vite-plus/test"; import * as ServerConfig from "../config.ts";import * as OpenCodeRuntime from "../provider/opencodeRuntime.ts";import * as OpenCodeTextGeneration from "./OpenCodeTextGeneration.ts";import * as TextGeneration from "./TextGeneration.ts"; const runtimeMock = {  state: {    startCalls: [] as string[],    promptUrls: [] as string[],    authHeaders: [] as Array<string | null>,    closeCalls: [] as string[],    sessionCreateError: undefined as unknown,    sessionResult: undefined as { data?: { id: string } } | undefined,    promptRequestError: undefined as unknown,    promptResult: undefined as      | { data?: { info?: { error?: unknown }; parts?: Array<unknown> } }      | undefined,  },  reset() {    this.state.startCalls.length = 0;    this.state.promptUrls.length = 0;    this.state.authHeaders.length = 0;    this.state.closeCalls.length = 0;    this.state.sessionCreateError = undefined;    this.state.sessionResult = undefined;    this.state.promptRequestError = undefined;    this.state.promptResult = undefined;  },}; const OpenCodeRuntimeTestDouble: OpenCodeRuntime.OpenCodeRuntimeShape = {  startOpenCodeServerProcess: ({ binaryPath }) =>    Effect.gen(function* () {      const index = runtimeMock.state.startCalls.length + 1;      const url = `http://127.0.0.1:${4_300 + index}`;      runtimeMock.state.startCalls.push(binaryPath);      // The production runtime binds server lifetime to the caller's scope.      // Mirror that here so the closeCalls probe observes scope close.      yield* Effect.addFinalizer(() =>        Effect.sync(() => {          runtimeMock.state.closeCalls.push(url);        }),      );      return {        url,        exitCode: Effect.never,      };    }),  connectToOpenCodeServer: ({ serverUrl }) =>    Effect.succeed({      url: serverUrl ?? "http://127.0.0.1:4301",      exitCode: null,      external: Boolean(serverUrl),    }),  runOpenCodeCommand: () => Effect.succeed({ stdout: "", stderr: "", code: 0 }),  createOpenCodeSdkClient: ({ baseUrl, serverPassword }) =>    ({      session: {        create: async () => {          if (runtimeMock.state.sessionCreateError !== undefined) {            throw runtimeMock.state.sessionCreateError;          }          return runtimeMock.state.sessionResult ?? { data: { id: `${baseUrl}/session` } };        },        prompt: async () => {          runtimeMock.state.promptUrls.push(baseUrl);          runtimeMock.state.authHeaders.push(            serverPassword ? `Basic ${btoa(`opencode:${serverPassword}`)}` : null,          );          if (runtimeMock.state.promptRequestError !== undefined) {            throw runtimeMock.state.promptRequestError;          }          return (            runtimeMock.state.promptResult ?? {              data: {                parts: [                  {                    type: "text",                    text: JSON.stringify({                      subject: "Improve OpenCode reuse",                      body: "Reuse one server for the full action.",                    }),                  },                ],              },            }          );        },      },    }) as unknown as ReturnType<OpenCodeRuntime.OpenCodeRuntimeShape["createOpenCodeSdkClient"]>,  loadOpenCodeInventory: () =>    Effect.fail(      new OpenCodeRuntime.OpenCodeRuntimeError({        operation: "loadOpenCodeInventory",        detail: "OpenCodeRuntimeTestDouble.loadOpenCodeInventory not used in this test",        cause: null,      }),    ),  loadInventoryFromCli: () =>    Effect.fail(      new OpenCodeRuntime.OpenCodeRuntimeError({        operation: "loadInventoryFromCli",        detail: "OpenCodeRuntimeTestDouble.loadInventoryFromCli not used in this test",        cause: null,      }),    ),}; const DEFAULT_TEST_MODEL_SELECTION = {  instanceId: ProviderInstanceId.make("opencode"),  model: "openai/gpt-5",};const DEFAULT_COMMIT_MESSAGE_INPUT = {  cwd: process.cwd(),  branch: "feature/opencode-reuse",  stagedSummary: "M README.md",  stagedPatch: "diff --git a/README.md b/README.md",  modelSelection: DEFAULT_TEST_MODEL_SELECTION,}; const OPENCODE_TEXT_GENERATION_IDLE_TTL_MS = 30_000; const OpenCodeTextGenerationTestLayer = Layer.succeed(  OpenCodeRuntime.OpenCodeRuntime,  OpenCodeRuntimeTestDouble,).pipe(  Layer.provideMerge(    ServerConfig.ServerConfig.layerTest(process.cwd(), {      prefix: "t3code-opencode-text-generation-test-",    }),  ),  Layer.provideMerge(NetService.layer),  Layer.provideMerge(NodeServices.layer),); const OpenCodeTextGenerationExistingServerTestLayer = Layer.succeed(  OpenCodeRuntime.OpenCodeRuntime,  OpenCodeRuntimeTestDouble,).pipe(  Layer.provideMerge(    ServerConfig.ServerConfig.layerTest(process.cwd(), {      prefix: "t3code-opencode-text-generation-existing-server-test-",    }),  ),  Layer.provideMerge(NetService.layer),  Layer.provideMerge(NodeServices.layer),); const DEFAULT_OPENCODE_SETTINGS = Schema.decodeSync(OpenCodeSettings)({  binaryPath: "fake-opencode",});const EXISTING_SERVER_OPENCODE_SETTINGS = Schema.decodeSync(OpenCodeSettings)({  binaryPath: "fake-opencode",  serverUrl: "http://127.0.0.1:9999",  serverPassword: "secret-password",}); function withOpenCodeTextGeneration<A, E, R>(  settings: OpenCodeSettings,  effectFn: (textGeneration: TextGeneration.TextGeneration["Service"]) => Effect.Effect<A, E, R>,) {  return Effect.gen(function* () {    const textGeneration = yield* OpenCodeTextGeneration.makeOpenCodeTextGeneration(settings);    return yield* effectFn(textGeneration);  }).pipe(Effect.scoped);} beforeEach(() => {  runtimeMock.reset();}); const advanceIdleClock = Effect.gen(function* () {  yield* Effect.yieldNow;  yield* TestClock.adjust(Duration.millis(OPENCODE_TEXT_GENERATION_IDLE_TTL_MS + 1));  yield* Effect.yieldNow;}); it.layer(OpenCodeTextGenerationTestLayer)("OpenCodeTextGeneration", (it) => {  it.effect("reuses a warm server across back-to-back requests and closes it after idling", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        yield* textGeneration.generateCommitMessage({          cwd: process.cwd(),          branch: "feature/opencode-reuse",          stagedSummary: "M README.md",          stagedPatch: "diff --git a/README.md b/README.md",          modelSelection: DEFAULT_TEST_MODEL_SELECTION,        });        yield* textGeneration.generateCommitMessage({          cwd: process.cwd(),          branch: "feature/opencode-reuse",          stagedSummary: "M README.md",          stagedPatch: "diff --git a/README.md b/README.md",          modelSelection: DEFAULT_TEST_MODEL_SELECTION,        });         expect(runtimeMock.state.startCalls).toEqual(["fake-opencode"]);        expect(runtimeMock.state.promptUrls).toEqual([          "http://127.0.0.1:4301",          "http://127.0.0.1:4301",        ]);        expect(runtimeMock.state.closeCalls).toEqual([]);         yield* advanceIdleClock;         expect(runtimeMock.state.closeCalls).toEqual(["http://127.0.0.1:4301"]);      }),    ).pipe(Effect.provide(TestClock.layer())),  );   it.effect("starts a new server after the warm server idles out", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        yield* textGeneration.generateCommitMessage({          cwd: process.cwd(),          branch: "feature/opencode-reuse",          stagedSummary: "M README.md",          stagedPatch: "diff --git a/README.md b/README.md",          modelSelection: DEFAULT_TEST_MODEL_SELECTION,        });         yield* advanceIdleClock;         yield* textGeneration.generateCommitMessage({          cwd: process.cwd(),          branch: "feature/opencode-reuse",          stagedSummary: "M README.md",          stagedPatch: "diff --git a/README.md b/README.md",          modelSelection: DEFAULT_TEST_MODEL_SELECTION,        });         expect(runtimeMock.state.startCalls).toEqual(["fake-opencode", "fake-opencode"]);        expect(runtimeMock.state.promptUrls).toEqual([          "http://127.0.0.1:4301",          "http://127.0.0.1:4302",        ]);        expect(runtimeMock.state.closeCalls).toEqual(["http://127.0.0.1:4301"]);      }),    ).pipe(Effect.provide(TestClock.layer())),  );   it.effect("preserves the SDK cause when session creation fails", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        const sdkCause = new Error("session endpoint unavailable");        runtimeMock.state.sessionCreateError = sdkCause;         const error = yield* textGeneration          .generateCommitMessage(DEFAULT_COMMIT_MESSAGE_INPUT)          .pipe(Effect.flip);         expect(error).toBeInstanceOf(TextGenerationError);        expect(error.message).toContain("OpenCode session.create request failed.");        expect(error.cause).toMatchObject({          _tag: "OpenCodeTextGenerationSessionRequestError",          operation: "generateCommitMessage",          cwd: process.cwd(),          cause: sdkCause,        });        expect((error.cause as { cause: unknown }).cause).toBe(sdkCause);      }),    ),  );   it.effect("reports a missing session payload without manufacturing a cause", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        runtimeMock.state.sessionResult = {};         const error = yield* textGeneration          .generateCommitMessage(DEFAULT_COMMIT_MESSAGE_INPUT)          .pipe(Effect.flip);         expect(error.message).toContain("OpenCode session.create returned no session payload.");        expect(error.cause).toMatchObject({          _tag: "OpenCodeTextGenerationSessionPayloadError",          operation: "generateCommitMessage",          cwd: process.cwd(),        });        expect(error.cause).not.toHaveProperty("cause");      }),    ),  );   it.effect("preserves the SDK cause and request context when prompting fails", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        const sdkCause = new Error("prompt endpoint unavailable");        runtimeMock.state.promptRequestError = sdkCause;         const error = yield* textGeneration          .generateCommitMessage(DEFAULT_COMMIT_MESSAGE_INPUT)          .pipe(Effect.flip);         expect(error.message).toContain("OpenCode session.prompt request failed.");        expect(error.cause).toMatchObject({          _tag: "OpenCodeTextGenerationPromptRequestError",          operation: "generateCommitMessage",          cwd: process.cwd(),          sessionId: "http://127.0.0.1:4301/session",          providerId: "openai",          modelId: "gpt-5",          cause: sdkCause,        });        expect((error.cause as { cause: unknown }).cause).toBe(sdkCause);      }),    ),  );   it.effect("returns a typed empty-output error for malformed and blank response parts", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        runtimeMock.state.promptResult = {          data: {            parts: [null, { type: "tool" }, { type: "text", text: "   " }],          },        };         const error = yield* textGeneration          .generateCommitMessage(DEFAULT_COMMIT_MESSAGE_INPUT)          .pipe(Effect.flip);         expect(error.message).toContain("OpenCode returned empty output.");        expect(error.cause).toMatchObject({          _tag: "OpenCodeTextGenerationEmptyOutputError",          operation: "generateCommitMessage",          cwd: process.cwd(),          sessionId: "http://127.0.0.1:4301/session",          providerId: "openai",          modelId: "gpt-5",          responsePartCount: 3,          textPartCount: 1,        });        expect(error.cause).not.toHaveProperty("cause");      }),    ),  );   it.effect("parses JSON returned as plain text output", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        runtimeMock.state.promptResult = {          data: {            parts: [              {                type: "text",                text: 'Here is the result:\n{"subject":"Tighten OpenCode parsing","body":"Handle JSON text output locally."}',              },            ],          },        };         const result = yield* textGeneration.generateCommitMessage({          cwd: process.cwd(),          branch: "feature/opencode-reuse",          stagedSummary: "M README.md",          stagedPatch: "diff --git a/README.md b/README.md",          modelSelection: DEFAULT_TEST_MODEL_SELECTION,        });         expect(result).toEqual({          subject: "Tighten OpenCode parsing",          body: "Handle JSON text output locally.",        });      }),    ),  );   it.effect("surfaces the upstream OpenCode structured-output error message", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        runtimeMock.state.promptResult = {          data: {            info: {              error: {                name: "StructuredOutputError",                data: {                  message: "Model did not produce structured output",                  retries: 2,                },              },            },          },        };         const error = yield* textGeneration          .generateCommitMessage(DEFAULT_COMMIT_MESSAGE_INPUT)          .pipe(Effect.flip);         expect(error.message).toContain("Model did not produce structured output");        expect(error.cause).toMatchObject({          _tag: "OpenCodeTextGenerationPromptResponseError",          operation: "generateCommitMessage",          cwd: process.cwd(),          sessionId: "http://127.0.0.1:4301/session",          providerId: "openai",          modelId: "gpt-5",          providerErrorName: "StructuredOutputError",          providerMessage: "Model did not produce structured output",        });        expect(error.cause).not.toHaveProperty("cause");      }),    ),  );}); it.layer(OpenCodeTextGenerationExistingServerTestLayer)(  "OpenCodeTextGeneration with configured server URL",  (it) => {    it.effect("reuses a configured OpenCode server URL without spawning or applying idle TTL", () =>      withOpenCodeTextGeneration(EXISTING_SERVER_OPENCODE_SETTINGS, (textGeneration) =>        Effect.gen(function* () {          yield* textGeneration.generateCommitMessage({            cwd: process.cwd(),            branch: "feature/opencode-reuse",            stagedSummary: "M README.md",            stagedPatch: "diff --git a/README.md b/README.md",            modelSelection: DEFAULT_TEST_MODEL_SELECTION,          });          yield* textGeneration.generateCommitMessage({            cwd: process.cwd(),            branch: "feature/opencode-reuse",            stagedSummary: "M README.md",            stagedPatch: "diff --git a/README.md b/README.md",            modelSelection: DEFAULT_TEST_MODEL_SELECTION,          });           expect(runtimeMock.state.startCalls).toEqual([]);          expect(runtimeMock.state.promptUrls).toEqual([            "http://127.0.0.1:9999",            "http://127.0.0.1:9999",          ]);          expect(runtimeMock.state.authHeaders).toEqual([            `Basic ${btoa("opencode:secret-password")}`,            `Basic ${btoa("opencode:secret-password")}`,          ]);           yield* advanceIdleClock;           expect(runtimeMock.state.closeCalls).toEqual([]);        }),      ).pipe(Effect.provide(TestClock.layer())),    );  },);