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

import type { CharacterCardView } from "@/lib/api/types";
import { useCharacterGen } from "./useCharacterGen";

// 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: "改名", where: "第3章", refs: ["林风"], suggestion: "沿用旧名" }],
      conflict_count: 1,
    },
  },
};

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

  it("初始为 idle、空卡、入库 idle、无冲突", () => {
    const { result } = renderHook(() => useCharacterGen());
    expect(result.current.genStatus).toBe("idle");
    expect(result.current.cards).toEqual([]);
    expect(result.current.ingestStatus).toBe("idle");
    expect(result.current.conflicts).toBeNull();
    expect(result.current.created).toEqual([]);
  });

  // —— generate ——

  it("生成成功：genStatus 走到 preview 并填充卡片", async () => {
    const cards = [{ name: "林风", role: "主角" }];
    post.mockResolvedValue({ data: { cards }, error: null });

    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({ projectId: "p1", brief: "热血少年", count: 3, role: "主角" });
    });

    expect(result.current.genStatus).toBe("preview");
    expect(result.current.cards).toEqual(cards);
    expect(toast).not.toHaveBeenCalled();
  });

  it("按定位配比生成：请求体带 role_mix、count 取各值之和", async () => {
    post.mockResolvedValue({ data: { cards: [] }, error: null });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({
        projectId: "p1",
        brief: "群像",
        count: 1,
        role: "忽略",
        roleMix: { 主角: 1, 对手: 2 },
      });
    });
    const body = post.mock.calls[0]?.[1]?.body;
    expect(body.role_mix).toEqual({ 主角: 1, 对手: 2 });
    expect(body.count).toBe(3);
    expect(body.role).toBeUndefined();
  });

  it("生成成功但 cards 缺失：回退为空数组", async () => {
    post.mockResolvedValue({ data: { cards: null }, error: null });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({ projectId: "p1", brief: "b", count: 1 });
    });
    expect(result.current.genStatus).toBe("preview");
    expect(result.current.cards).toEqual([]);
  });

  it("生成后端返回 error：genStatus=error 且弹错误 toast", async () => {
    post.mockResolvedValue({ data: null, error: { detail: "配额不足" } });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({ projectId: "p1", brief: "b", count: 2 });
    });
    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(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({ projectId: "p1", brief: "b", count: 2 });
    });
    expect(result.current.genStatus).toBe("error");
    expect(toast).toHaveBeenCalledWith("生成请求异常，请检查网络。", "error");
  });

  // —— ingest ——

  it("入库空选择：拒绝并提示，返回 false", async () => {
    const { result } = renderHook(() => useCharacterGen());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", []);
    });
    expect(ok).toBe(false);
    expect(toast).toHaveBeenCalledWith("请至少选择一张角色卡。", "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: ["c1", "c2"] }, error: null });
    const { result } = renderHook(() => useCharacterGen());
    let ok = false;
    await act(async () => {
      ok = await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    expect(ok).toBe(true);
    expect(result.current.ingestStatus).toBe("done");
    expect(result.current.created).toEqual(["c1", "c2"]);
    expect(result.current.conflicts).toBeNull();
    expect(toast).toHaveBeenCalledWith("已入库 2 个角色", "success");
  });

  it("入库成功但 created 缺失：回退空数组并提示 0 个", async () => {
    post.mockResolvedValue({ data: { created: null }, error: null });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    expect(result.current.created).toEqual([]);
    expect(toast).toHaveBeenCalledWith("已入库 0 个角色", "success");
  });

  it("入库成功且有越权写表：额外弹 info toast", async () => {
    post.mockResolvedValue({
      data: { created: ["c1"], rejected_tables: ["secrets", "rules"] },
      error: null,
    });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    expect(toast).toHaveBeenCalledWith("越权写表被丢弃：secrets、rules", "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(() => useCharacterGen());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    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(() => useCharacterGen());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    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(() => useCharacterGen());
    let ok = true;
    await act(async () => {
      ok = await result.current.ingest("p1", [{ name: "林风" } as CharacterCardView]);
    });
    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: { cards: [{ name: "林风" } as CharacterCardView] }, error: null });
    const { result } = renderHook(() => useCharacterGen());
    await act(async () => {
      await result.current.generate({ projectId: "p1", brief: "b", count: 1 });
    });
    act(() => result.current.reset());
    expect(result.current.genStatus).toBe("idle");
    expect(result.current.cards).toEqual([]);
    expect(result.current.ingestStatus).toBe("idle");
    expect(result.current.conflicts).toBeNull();
    expect(result.current.created).toEqual([]);
  });
});