// @vitest-environment jsdom
import { act, renderHook } from "@testing-library/react";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

import { useGenerator } from "./useGenerator";
import type { IngestBuildInput } from "./ingest";

// 后端客户端与 Toast 是 hook 的外部副作用边界，单测一律 mock。
const post = vi.fn();
const toast = vi.fn();
vi.mock("@/lib/api/client", () => ({ api: { POST: (...a: unknown[]) => post(...a) } }));
vi.mock("@/components/Toast", () => ({ useToast: () => toast }));

const conflictEnvelope = {
  error: {
    code: "CONFLICT_UNRESOLVED",
    details: {
      conflicts: [{ type: "冲突", where: "world", refs: [], suggestion: "改写" }],
      conflict_count: 1,
    },
  },
};

// 行式可入库产物（金手指 → world_entities）。
const goldenInput: IngestBuildInput = {
  outputKind: "GoldenFingerResult",
  rows: [{ name: "吞噬之眼", mechanism: "吞噬", growth: "无限", limits: "反噬" }],
};

describe("useGenerator", () => {
  beforeEach(() => {
    post.mockReset();
    toast.mockReset();
  });
  afterEach(() => vi.clearAllMocks());

  it("初始为 idle、无预览、入库 idle、无冲突", () => {
    const { result } = renderHook(() => useGenerator());
    expect(result.current.genStatus).toBe("idle");
    expect(result.current.preview).toBeNull();
    expect(result.current.rawPreview).toBeUndefined();
    expect(result.current.outputKind).toBeNull();
    expect(result.current.ingestStatus).toBe("idle");
    expect(result.current.conflicts).toBeNull();
    expect(result.current.created).toEqual([]);
  });

  // —— generate ——

  it("生成成功：genStatus=preview，映射预览模型 + 记录 rawPreview/outputKind", async () => {
    const preview = { ideas: [{ premise: "废柴逆袭", hook: "扮猪吃虎" }] };
    post.mockResolvedValue({
      data: { output_kind: "IdeaListResult", preview },
      error: null,
    });

    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.generate("p1", "idea", { brief: "脑洞" });
    });

    expect(result.current.genStatus).toBe("preview");
    expect(result.current.outputKind).toBe("IdeaListResult");
    expect(result.current.rawPreview).toEqual(preview);
    expect(result.current.preview?.kind).toBe("IdeaListResult");
    expect(result.current.preview?.items[0]?.heading).toBe("废柴逆袭");
    expect(toast).not.toHaveBeenCalled();
  });

  it("生成后端返回 error：genStatus=error 且弹错误 toast", async () => {
    post.mockResolvedValue({ data: null, error: { detail: "失败" } });
    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.generate("p1", "idea", { brief: "x" });
    });
    expect(result.current.genStatus).toBe("error");
    expect(toast).toHaveBeenCalledWith(expect.any(String), "error");
  });

  it("生成请求抛异常：genStatus=error 且弹网络异常 toast", async () => {
    post.mockRejectedValue(new Error("network down"));
    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.generate("p1", "idea", { brief: "x" });
    });
    expect(result.current.genStatus).toBe("error");
    expect(toast).toHaveBeenCalledWith("生成请求异常，请检查网络。", "error");
  });

  // —— ingest ——

  it("入库不支持的产物（buildIngestRequest 返 null）：提示并返回 false", async () => {
    const { result } = renderHook(() => useGenerator());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", "opening", {
        outputKind: "OpeningResult",
        rows: [{ text: "正文" }],
      });
    });
    expect(ok).toBe(false);
    expect(toast).toHaveBeenCalledWith("该生成器不支持入库。", "error");
    expect(post).not.toHaveBeenCalled();
  });

  it("入库空行：提示至少选择一项并返回 false", async () => {
    const { result } = renderHook(() => useGenerator());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", "golden", {
        outputKind: "GoldenFingerResult",
        rows: [],
      });
    });
    expect(ok).toBe(false);
    expect(toast).toHaveBeenCalledWith("请至少选择一项入库。", "error");
    expect(post).not.toHaveBeenCalled();
  });

  it("入库成功：ingestStatus=done、记录 created、弹成功 toast，返回 true", async () => {
    post.mockResolvedValue({
      data: { created: ["w1", "w2"], table: "world_entities" },
      error: null,
    });
    const { result } = renderHook(() => useGenerator());
    let ok = false;
    await act(async () => {
      ok = await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(ok).toBe(true);
    expect(result.current.ingestStatus).toBe("done");
    expect(result.current.created).toEqual(["w1", "w2"]);
    expect(result.current.conflicts).toBeNull();
    expect(toast).toHaveBeenCalledWith("已入库 2 项至 world_entities", "success");
  });

  it("入库成功但 created 缺失：回退空数组并提示 0 项", async () => {
    post.mockResolvedValue({ data: { created: null, table: "world_entities" }, error: null });
    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(result.current.created).toEqual([]);
    expect(toast).toHaveBeenCalledWith("已入库 0 项至 world_entities", "success");
  });

  it("入库成功且有越权写表：额外弹 info toast", async () => {
    post.mockResolvedValue({
      data: { created: ["w1"], table: "world_entities", rejected_tables: ["secrets"] },
      error: null,
    });
    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(toast).toHaveBeenCalledWith("越权写表被丢弃：secrets", "info");
  });

  it("入库 409 冲突：ingestStatus=conflict 并暴露 conflicts，返回 false", async () => {
    post.mockResolvedValue({ data: null, error: conflictEnvelope });
    const { result } = renderHook(() => useGenerator());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(ok).toBe(false);
    expect(result.current.ingestStatus).toBe("conflict");
    expect(result.current.conflicts?.conflictCount).toBe(1);
    expect(result.current.conflicts?.conflicts).toHaveLength(1);
  });

  it("入库非冲突 error：ingestStatus=error 且弹错误 toast，返回 false", async () => {
    post.mockResolvedValue({ data: null, error: { error: { code: "LLM_UNAVAILABLE" } } });
    const { result } = renderHook(() => useGenerator());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(ok).toBe(false);
    expect(result.current.ingestStatus).toBe("error");
    expect(toast).toHaveBeenCalledWith(expect.any(String), "error");
  });

  it("入库请求抛异常：ingestStatus=error 且弹网络异常 toast，返回 false", async () => {
    post.mockRejectedValue(new Error("boom"));
    const { result } = renderHook(() => useGenerator());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", "golden", goldenInput);
    });
    expect(ok).toBe(false);
    expect(result.current.ingestStatus).toBe("error");
    expect(toast).toHaveBeenCalledWith("入库请求异常，请检查网络。", "error");
  });

  // —— reset ——

  it("reset 清回初始态", async () => {
    post.mockResolvedValue({
      data: { output_kind: "IdeaListResult", preview: { ideas: [{ premise: "p" }] } },
      error: null,
    });
    const { result } = renderHook(() => useGenerator());
    await act(async () => {
      await result.current.generate("p1", "idea", { brief: "x" });
    });
    act(() => result.current.reset());
    expect(result.current.genStatus).toBe("idle");
    expect(result.current.preview).toBeNull();
    expect(result.current.rawPreview).toBeUndefined();
    expect(result.current.outputKind).toBeNull();
    expect(result.current.ingestStatus).toBe("idle");
    expect(result.current.conflicts).toBeNull();
    expect(result.current.created).toEqual([]);
  });
});