import { describe, it, expect, beforeEach, afterAll, vi } from "vitest";
import { prisma, resetDb, mockFeishuRuntime, seedProject, silentLogger } from "./helpers.js";
import { InMemoryModelRegistry } from "../../src/agent/models.js";
import { makeTriggerHandler, extractPrompt } from "../../src/feishu/trigger.js";
import { TriggerQueue } from "../../src/feishu/triggerQueue.js";
import type { MessageReceiveEvent } from "../../src/feishu/client.js";
import type { RunRequest, RunResult } from "../../src/agent/runner.js";
import type { RuntimeSettings } from "../../src/settings/runtime.js";

const bot = { key: "@_user_1", id: { open_id: "ou_bot" }, name: "Bot" };
type TestRunner = (req: RunRequest) => Promise<RunResult>;

function makeTestSettings(models: InMemoryModelRegistry): RuntimeSettings {
  return {
    async provider(providerId) {
      return {
        id: providerId,
        baseUrl: "https://openrouter.ai/api",
        authToken: "test-token",
        anthropicApiKey: "",
        sdkEnv: {
          ANTHROPIC_BASE_URL: "https://openrouter.ai/api",
          ANTHROPIC_AUTH_TOKEN: "test-token",
          ANTHROPIC_API_KEY: "",
        },
      };
    },
    async modelRegistry() {
      return models;
    },
    async runPolicy() {
      return { maxTurns: 7 };
    },
  };
}

function makeEvent(chatId: string, text: string, senderOpenId = "ou_test_user", eventId?: string): MessageReceiveEvent {
  const header = eventId !== undefined ? { event_id: eventId, event_type: "im.message.receive_v1" } : undefined;
  return {
    header,
    message: {
      message_id: "m_" + Math.random().toString(36).slice(2),
      chat_id: chatId,
      chat_type: "group",
      message_type: "text",
      content: JSON.stringify({ text }),
      mentions: [bot],
    },
    sender: { sender_id: { open_id: senderOpenId }, sender_type: "user" },
  };
}

function createMockRunAgent(calls: RunRequest[] = []): TestRunner {
  return async (req) => {
    calls.push(req);
    req.onStream?.({ type: "text-delta", text: "mock response" });
    await req.prisma.agentMessage.create({
      data: {
        sessionId: req.sessionId,
        runId: req.runId,
        role: "assistant",
        content: "mock response",
        attachments: [],
      },
    });
    return {
      status: "completed",
      text: "mock response",
      usage: { inputTokens: 10, outputTokens: 5 },
      numTurns: 1,
      sdkSessionId: "sdk-session-1",
    };
  };
}

describe("trigger full lifecycle (integration)", () => {
  let models: InMemoryModelRegistry;
  let settings: RuntimeSettings;
  let rt: ReturnType<typeof mockFeishuRuntime>;
  let runAgentCalls: RunRequest[];
  let runAgent: TestRunner;

  beforeEach(async () => {
    await resetDb();
    runAgentCalls = [];
    runAgent = createMockRunAgent(runAgentCalls);
    models = new InMemoryModelRegistry(
      [{ id: "mock-model", label: "Mock", toolCapable: true }],
      [
        { id: "draft", label: "草稿", defaultModel: "mock-model", systemPrompt: undefined, tools: undefined },
        { id: "review", label: "审校", defaultModel: "mock-model", systemPrompt: undefined, tools: ["read_file"] },
      ],
    );
    settings = makeTestSettings(models);
    rt = mockFeishuRuntime();
  });

  it("creates a run, acquires + releases the lock, sends status card", async () => {
    await seedProject("proj-1", "chat-1");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-1", "@_user_1 写教案"), rt);

    // Wait for the async run to complete (fire-and-forget in trigger).
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
    });

    // Lock released (no lock row remains).
    await vi.waitFor(async () => {
      const locks = await prisma.projectAgentLock.findMany();
      expect(locks).toHaveLength(0);
    });

    // A status card was sent.
    expect(rt.sentCards.length).toBeGreaterThanOrEqual(1);
    expect(rt.sentTexts).toContain("mock response");
    expect(runAgentCalls).toHaveLength(1);
    expect(runAgentCalls[0]?.providerEnv).toMatchObject({
      ANTHROPIC_BASE_URL: "https://openrouter.ai/api",
      ANTHROPIC_AUTH_TOKEN: "test-token",
      ANTHROPIC_API_KEY: "",
    });
    expect(runAgentCalls[0]?.maxTurns).toBe(7);
  });

  it("batches quick text messages from the same chat and sender into one run", async () => {
    await seedProject("proj-1b", "chat-1b");
    const trigger = makeTriggerHandler({
      prisma,
      settings,
      logger: silentLogger,
      runAgent,
      messageBatcherOptions: { debounceMs: 10_000, maxMessages: 2 },
    });

    await trigger(makeEvent("chat-1b", "@_user_1 第一段"), rt);
    expect(await prisma.agentRun.findMany()).toHaveLength(0);

    await trigger(makeEvent("chat-1b", "@_user_1 第二段"), rt);

    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
      expect(runs[0]?.prompt).toBe("第一段\n第二段");
    });
    expect(runAgentCalls).toHaveLength(1);
    expect(runAgentCalls[0]?.prompt).toBe("第一段\n第二段");
  });

  it("/new bypasses message batching", async () => {
    await seedProject("proj-1c", "chat-1c");
    const trigger = makeTriggerHandler({
      prisma,
      settings,
      logger: silentLogger,
      runAgent,
      messageBatcherOptions: { debounceMs: 10_000 },
    });

    await trigger(makeEvent("chat-1c", "@_user_1 /new"), rt);

    expect(rt.sentTexts).toContain("已开新会话,下次 @bot 将从头开始。");
    expect(runAgentCalls).toHaveLength(0);
    expect(await prisma.agentRun.findMany()).toHaveLength(0);
  });

  it("rejects a sender without edit grant (ADR-0004)", async () => {
    await seedProject("proj-2", "chat-2", { role: "READ" });
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-2", "@_user_1 写教案"), rt);

    expect(rt.sentTexts).toContain("无权限触发。");
    expect(runAgentCalls).toHaveLength(0);
    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(0);
  });

  it("queues a text trigger when project is already locked (ADR-0002)", async () => {
    await seedProject("proj-3", "chat-3");
    // Manually create a lock by inserting a run + lock.
    const existingRun = await prisma.agentRun.create({
      data: { projectId: "proj-3", entrypoint: "FEISHU", status: "ACTIVE", prompt: "x", model: "m", provider: "mock", metadata: {} },
    });
    await prisma.projectAgentLock.create({
      data: { projectId: "proj-3", runId: existingRun.id },
    });

    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });
    await trigger(makeEvent("chat-3", "@_user_1 写教案"), rt);

    expect(rt.sentTexts).toContain("已加入队列（第1位），当前处理完成后将自动开始");
    expect(rt.reactions.some((reaction) => reaction.emoji === "OnIt")).toBe(false);
    expect(runAgentCalls).toHaveLength(0);
    // No new run created.
    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(1);
  });

  it("starts the next queued text trigger when the current run finishes", async () => {
    await seedProject("proj-3b", "chat-3b");
    const firstRun = deferred<RunResult>();
    const secondRun = deferred<RunResult>();
    const pendingRuns = [firstRun, secondRun];
    const queuedRunAgent: TestRunner = async (req) => {
      runAgentCalls.push(req);
      req.onStream?.({ type: "text-delta", text: `mock response ${runAgentCalls.length}` });
      const pendingRun = pendingRuns.shift();
      if (pendingRun === undefined) {
        throw new Error("unexpected extra run");
      }
      return pendingRun.promise;
    };
    const trigger = makeTriggerHandler({
      prisma,
      settings,
      logger: silentLogger,
      runAgent: queuedRunAgent,
      messageBatcherOptions: { maxMessages: 1 },
    });

    await trigger(makeEvent("chat-3b", "@_user_1 第一个请求"), rt);
    await vi.waitFor(() => {
      expect(runAgentCalls).toHaveLength(1);
    });

    await trigger(makeEvent("chat-3b", "@_user_1 第二个请求"), rt);
    expect(rt.sentTexts).toContain("已加入队列（第1位），当前处理完成后将自动开始");
    expect(runAgentCalls).toHaveLength(1);

    firstRun.resolve(completedRunResult("first done", "sdk-session-first"));
    await vi.waitFor(() => {
      expect(runAgentCalls).toHaveLength(2);
    });
    expect(runAgentCalls[1]?.prompt).toBe("第二个请求");

    secondRun.resolve(completedRunResult("second done", "sdk-session-second"));
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany({ orderBy: { startedAt: "asc" } });
      expect(runs).toHaveLength(2);
      expect(runs.every((run) => run.status === "COMPLETED")).toBe(true);
    });
  });

  it("ignores messages from unbound chats (ADR-0001)", async () => {
    await seedProject("proj-4", "chat-4");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-UNKNOWN", "@_user_1 写教案"), rt);

    expect(rt.sentTexts).toHaveLength(0);
    expect(rt.sentCards).toHaveLength(0);
    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(0);
  });

  it("ignores messages without @bot mention", async () => {
    await seedProject("proj-5", "chat-5");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    const event: MessageReceiveEvent = {
      message: {
        message_id: "m_nobot",
        chat_id: "chat-5",
        chat_type: "group",
        message_type: "text",
        content: JSON.stringify({ text: "hello no bot" }),
        mentions: undefined,
      },
      sender: { sender_id: { open_id: "ou_test_user" }, sender_type: "user" },
    };
    await trigger(event, rt);

    expect(rt.sentTexts).toHaveLength(0);
    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(0);
  });

  it("/new archives current session (no run created)", async () => {
    await seedProject("proj-6", "chat-6");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    // First @bot creates a session + run.
    await trigger(makeEvent("chat-6", "@_user_1 写教案"), rt);
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
    });

    // /new archives the session.
    await trigger(makeEvent("chat-6", "@_user_1 /new"), rt);
    expect(rt.sentTexts).toContain("已开新会话,下次 @bot 将从头开始。");

    const sessions = await prisma.agentSession.findMany();
    expect(sessions).toHaveLength(1);
    expect(sessions[0]?.archivedAt).not.toBeNull();
    // No new run created for /new.
    expect(await prisma.agentRun.findMany()).toHaveLength(1);
  });

  it("/resume un-archives the most recent session", async () => {
    await seedProject("proj-7", "chat-7");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    // Create + archive a session via /new.
    await trigger(makeEvent("chat-7", "@_user_1 写教案"), rt);
    await vi.waitFor(async () => {
      expect(await prisma.agentRun.findMany()).toHaveLength(1);
    });
    await trigger(makeEvent("chat-7", "@_user_1 /new"), rt);

    // /resume un-archives.
    await trigger(makeEvent("chat-7", "@_user_1 /resume"), rt);
    expect(rt.sentTexts).toContain("已恢复上一个会话。");

    const sessions = await prisma.agentSession.findMany();
    expect(sessions).toHaveLength(1);
    expect(sessions[0]?.archivedAt).toBeNull();
  });

  it("/reset archives current session", async () => {
    await seedProject("proj-8", "chat-8");
    const queue = new TriggerQueue();
    const trigger = makeTriggerHandler({
      prisma,
      settings,
      logger: silentLogger,
      runAgent,
      messageBatcherOptions: { maxMessages: 1 },
      triggerQueue: queue,
    });

    await trigger(makeEvent("chat-8", "@_user_1 写教案"), rt);
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
    });

    const queuedEvent = makeEvent("chat-8", "@_user_1 后续需求");
    queue.enqueue("proj-8", {
      chatId: "chat-8",
      prompt: extractPrompt(queuedEvent.message) ?? "后续需求",
      msg: queuedEvent.message,
      senderOpenId: "ou_test_user",
      actor: { feishuOpenId: "ou_test_user", chatId: "chat-8" },
    });
    expect(queue.length("proj-8")).toBe(1);

    await trigger(makeEvent("chat-8", "@_user_1 /reset"), rt);
    expect(rt.sentTexts).toContain("已重置,下次 @bot 将从头开始。");
    expect(queue.length("proj-8")).toBe(0);

    const sessions = await prisma.agentSession.findMany();
    expect(sessions).toHaveLength(1);
    expect(sessions[0]?.archivedAt).not.toBeNull();
  });

  it("unknown slash command falls through to agent", async () => {
    await seedProject("proj-9", "chat-9");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-9", "@_user_1 /unknown"), rt);
    // Should create a run (falls through as a normal prompt).
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.prompt).toBe("/unknown");
    });
  });

  it("denies /review when sender has no role grant (per-role gate)", async () => {
    await seedProject("proj-10", "chat-10");
    // Someone else holds review; ou_test_user does not.
    await prisma.roleTriggerGrant.create({
      data: { projectId: "proj-10", roleId: "review", principalType: "USER", principalId: "ou_other" },
    });
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-10", "@_user_1 /review 看看这节"), rt);

    expect(rt.sentTexts).toContain("无权限使用角色 review。");
    expect(runAgentCalls).toHaveLength(0);
    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(0);
  });

  it("allows /review when sender holds the role grant", async () => {
    await seedProject("proj-11", "chat-11");
    await prisma.roleTriggerGrant.create({
      data: { projectId: "proj-11", roleId: "review", principalType: "USER", principalId: "ou_test_user" },
    });
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-11", "@_user_1 /review 看看这节"), rt);

    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
      expect(runs[0]?.metadata).toMatchObject({ roleId: "review" });
    });
  });

  it("extractRole: /draft sets roleId=draft, strips command from prompt", async () => {
    await seedProject("proj-12", "chat-12");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-12", "@_user_1 /draft 写第三单元"), rt);

    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.prompt).toBe("写第三单元");
      expect(runs[0]?.metadata).toMatchObject({ roleId: "draft" });
    });
  });

  it("dedups a redelivered event by event_id (no second run)", async () => {
    await seedProject("proj-13", "chat-13");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    // First delivery: processes normally.
    await trigger(makeEvent("chat-13", "@_user_1 写教案", "ou_test_user", "evt-dedup-1"), rt);
    await vi.waitFor(async () => {
      const runs = await prisma.agentRun.findMany();
      expect(runs).toHaveLength(1);
      expect(runs[0]?.status).toBe("COMPLETED");
    });

    // Redelivery of the same event_id: must not create a second run.
    await trigger(makeEvent("chat-13", "@_user_1 写教案", "ou_test_user", "evt-dedup-1"), rt);
    const runs2 = await prisma.agentRun.findMany();
    expect(runs2).toHaveLength(1);

    // Only one event receipt row.
    const receipts = await prisma.feishuEventReceipt.findMany();
    expect(receipts).toHaveLength(1);
    expect(receipts[0]?.eventId).toBe("evt-dedup-1");
  });

  it("dedups flattened websocket events by top-level event_id", async () => {
    await seedProject("proj-13b", "chat-13b");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });
    const event: MessageReceiveEvent = {
      ...makeEvent("chat-13b", "@_user_1 写教案"),
      event_id: "evt-flat-1",
      event_type: "im.message.receive_v1",
    };

    await trigger(event, rt);
    await vi.waitFor(async () => {
      expect(await prisma.agentRun.findMany()).toHaveLength(1);
    });

    await trigger(
      {
        ...event,
        message: { ...event.message, message_id: "m_flat_redelivery" },
      },
      rt,
    );

    const runs = await prisma.agentRun.findMany();
    expect(runs).toHaveLength(1);
    const receipts = await prisma.feishuEventReceipt.findMany();
    expect(receipts).toHaveLength(1);
    expect(receipts[0]?.eventId).toBe("evt-flat-1");
  });

  it("seeds replied-to message context when @bot is used in a Feishu reply", async () => {
    await seedProject("proj-13c", "chat-13c");
    rt.readableMessages.set("m-parent", {
      message_id: "m-parent",
      root_id: "m-root",
      thread_id: "thread-1",
      msg_type: "text",
      chat_id: "chat-13c",
      sender: { id: "ou_teacher_2", sender_type: "user" },
      body: { content: JSON.stringify({ text: "上一条需求: 把第二题改成探究题。" }) },
    });
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });
    const baseEvent = makeEvent("chat-13c", "@_user_1 继续这个改法");
    const event: MessageReceiveEvent = {
      ...baseEvent,
      message: {
        ...baseEvent.message,
        message_id: "m-child",
        root_id: "m-root",
        parent_id: "m-parent",
        thread_id: "thread-1",
      },
    };

    await trigger(event, rt);

    await vi.waitFor(() => {
      expect(runAgentCalls).toHaveLength(1);
    });
    const prompt = runAgentCalls[0]?.prompt ?? "";
    expect(prompt).toContain("Feishu trigger context");
    expect(prompt).toContain("reply_to_message_id");
    expect(prompt).toContain("m-parent");
    expect(prompt).toContain("thread-1");
    expect(prompt).toContain("上一条需求");
    expect(prompt).toContain("User request:\n继续这个改法");

    const run = await prisma.agentRun.findFirst();
    expect(run?.prompt).toBe(prompt);
    expect(run?.metadata).toMatchObject({
      roleId: "draft",
      rawPrompt: "继续这个改法",
      feishuTriggerContext: {
        trigger_message_id: "m-child",
        reply_to_message_id: "m-parent",
        root_id: "m-root",
        thread_id: "thread-1",
      },
    });
  });

  it("writes audit entries across the run lifecycle", async () => {
    await seedProject("proj-14", "chat-14");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-14", "@_user_1 写教案"), rt);
    await vi.waitFor(async () => {
      const audit = await prisma.auditEntry.findMany();
      expect(audit.length).toBeGreaterThanOrEqual(2);
    });

    const audit = await prisma.auditEntry.findMany({ orderBy: { createdAt: "asc" } });
    expect(audit.some((a) => a.action === "run.created")).toBe(true);
    expect(audit.some((a) => a.action === "run.finished")).toBe(true);
  });

  it("persists AgentMessage rows for the run (A-3 structured history)", async () => {
    await seedProject("proj-15", "chat-15");
    const trigger = makeTriggerHandler({ prisma, settings, logger: silentLogger, runAgent, messageBatcherOptions: { maxMessages: 1 } });

    await trigger(makeEvent("chat-15", "@_user_1 写教案"), rt);
    await vi.waitFor(async () => {
      const msgs = await prisma.agentMessage.findMany();
      expect(msgs.length).toBeGreaterThanOrEqual(1);
    });
    const msgs = await prisma.agentMessage.findMany({ orderBy: { createdAt: "asc" } });
    expect(msgs.length).toBeGreaterThanOrEqual(1);
    const run = await prisma.agentRun.findFirst();
    expect(msgs.every((m) => m.runId === run?.id)).toBe(true);
    expect(msgs.some((m) => m.role === "assistant")).toBe(true);
  });
});

interface Deferred<T> {
  readonly promise: Promise<T>;
  readonly resolve: (value: T) => void;
  readonly reject: (reason?: unknown) => void;
}

function deferred<T>(): Deferred<T> {
  let resolve!: (value: T) => void;
  let reject!: (reason?: unknown) => void;
  const promise = new Promise<T>((res, rej) => {
    resolve = res;
    reject = rej;
  });
  return { promise, resolve, reject };
}

function completedRunResult(text: string, sdkSessionId: string): RunResult {
  return {
    status: "completed",
    text,
    usage: { inputTokens: 10, outputTokens: 5 },
    numTurns: 1,
    sdkSessionId,
  };
}

afterAll(async () => {
  await prisma.$disconnect();
});