import { OpenCodeSettings, ProviderInstanceId } from "@t3tools/contracts";import * as NodeServices from "@effect/platform-node/NodeServices";import { it } from "@effect/vitest";import { Duration, Effect, Layer, Schema } from "effect";import { TestClock } from "effect/testing";import { NetService } from "@t3tools/shared/Net";import { beforeEach, expect } from "vitest"; import { ServerConfig } from "../config.ts";import {  OpenCodeRuntime,  OpenCodeRuntimeError,  type OpenCodeRuntimeShape,} from "../provider/opencodeRuntime.ts";import { type TextGenerationShape } from "./TextGeneration.ts";import { makeOpenCodeTextGeneration } from "./OpenCodeTextGeneration.ts"; const runtimeMock = {  state: {    startCalls: [] as string[],    promptUrls: [] as string[],    authHeaders: [] as Array<string | null>,    closeCalls: [] as string[],    promptResult: undefined as      | { data?: { info?: { error?: unknown }; parts?: Array<{ type: string; text?: string }> } }      | undefined,  },  reset() {    this.state.startCalls.length = 0;    this.state.promptUrls.length = 0;    this.state.authHeaders.length = 0;    this.state.closeCalls.length = 0;    this.state.promptResult = undefined;  },}; const OpenCodeRuntimeTestDouble: OpenCodeRuntimeShape = {  startOpenCodeServerProcess: ({ binaryPath }) =>    Effect.gen(function* () {      const index = runtimeMock.state.startCalls.length + 1;      const url = `http://127.0.0.1:${4_300 + index}`;      runtimeMock.state.startCalls.push(binaryPath);      // The production runtime binds server lifetime to the caller's scope.      // Mirror that here so the closeCalls probe observes scope close.      yield* Effect.addFinalizer(() =>        Effect.sync(() => {          runtimeMock.state.closeCalls.push(url);        }),      );      return {        url,        exitCode: Effect.never,      };    }),  connectToOpenCodeServer: ({ serverUrl }) =>    Effect.succeed({      url: serverUrl ?? "http://127.0.0.1:4301",      exitCode: null,      external: Boolean(serverUrl),    }),  runOpenCodeCommand: () => Effect.succeed({ stdout: "", stderr: "", code: 0 }),  createOpenCodeSdkClient: ({ baseUrl, serverPassword }) =>    ({      session: {        create: async () => ({ data: { id: `${baseUrl}/session` } }),        prompt: async () => {          runtimeMock.state.promptUrls.push(baseUrl);          runtimeMock.state.authHeaders.push(            serverPassword ? `Basic ${btoa(`opencode:${serverPassword}`)}` : null,          );          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<OpenCodeRuntimeShape["createOpenCodeSdkClient"]>,  loadOpenCodeInventory: () =>    Effect.fail(      new OpenCodeRuntimeError({        operation: "loadOpenCodeInventory",        detail: "OpenCodeRuntimeTestDouble.loadOpenCodeInventory not used in this test",        cause: null,      }),    ),}; const DEFAULT_TEST_MODEL_SELECTION = {  instanceId: ProviderInstanceId.make("opencode"),  model: "openai/gpt-5",}; const OPENCODE_TEXT_GENERATION_IDLE_TTL_MS = 30_000; const OpenCodeTextGenerationTestLayer = Layer.succeed(  OpenCodeRuntime,  OpenCodeRuntimeTestDouble,).pipe(  Layer.provideMerge(    ServerConfig.layerTest(process.cwd(), {      prefix: "t3code-opencode-text-generation-test-",    }),  ),  Layer.provideMerge(NetService.layer),  Layer.provideMerge(NodeServices.layer),); const OpenCodeTextGenerationExistingServerTestLayer = Layer.succeed(  OpenCodeRuntime,  OpenCodeRuntimeTestDouble,).pipe(  Layer.provideMerge(    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: TextGenerationShape) => Effect.Effect<A, E, R>,) {  return Effect.gen(function* () {    const textGeneration = yield* 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("returns a typed empty-output error when OpenCode returns no text parts", () =>    withOpenCodeTextGeneration(DEFAULT_OPENCODE_SETTINGS, (textGeneration) =>      Effect.gen(function* () {        runtimeMock.state.promptResult = { data: {} };         const error = 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,          })          .pipe(Effect.flip);         expect(error.message).toContain("OpenCode returned empty output.");      }),    ),  );   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({            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,          })          .pipe(Effect.flip);         expect(error.message).toContain("Model did not produce structured output");      }),    ),  );}); 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())),    );  },);