import { mkdirSync, mkdtempSync, rmSync, writeFileSync } from "node:fs";
import os from "node:os";
import path from "node:path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import type { PresetPackage } from "../src/types/preset.js";
import { buildCaseMessages } from "../src/preset/test-run.js";
import { getTestRun, saveTestRun, updateVerdict } from "../src/preset/test-runs.js";
import { deleteTestGroup, getTestGroup, listTestGroups, saveTestGroup } from "../src/preset/test-cases.js";
import { deleteTestCase, listTestCases, saveTestCase } from "../src/preset/test-cases.js";
import { loadPresetLabState, savePresetLabState } from "../src/preset/lab-state.js";

function preset(): PresetPackage {
  return {
    id: "pp",
    name: "pp",
    source: "native",
    prompts: [
      { id: "sys", name: "规则", enabled: true, role: "system", content: "你是{{char}}的叙事者", marker: false, sourceIdentifier: "sys" },
      { id: "worldInfoBefore", name: "世界书", enabled: true, role: "system", content: "", marker: true, sourceIdentifier: "worldInfoBefore" },
      { id: "charDescription", name: "角色描述", enabled: true, role: "system", content: "", marker: true, sourceIdentifier: "charDescription" },
      { id: "chatHistory", name: "历史", enabled: true, role: "system", content: "", marker: true, sourceIdentifier: "chatHistory" },
      { id: "currentTurn", name: "本轮", enabled: true, role: "user", content: "", marker: true, sourceIdentifier: "currentTurn" },
    ],
    promptOrder: [
      { promptId: "sys", enabled: true, orderIndex: 0 },
      { promptId: "worldInfoBefore", enabled: true, orderIndex: 1 },
      { promptId: "charDescription", enabled: true, orderIndex: 2 },
      { promptId: "chatHistory", enabled: true, orderIndex: 3 },
      { promptId: "currentTurn", enabled: true, orderIndex: 4 },
    ],
    generation: {},
    unsupported: [],
    importedAt: new Date().toISOString(),
  };
}

let dir = "";
beforeEach(() => {
  dir = mkdtempSync(path.join(os.tmpdir(), "preset-tests-"));
  process.env.WRITING_AGENT_DATA_DIR = dir;
});
afterEach(() => {
  delete process.env.WRITING_AGENT_DATA_DIR;
  rmSync(dir, { recursive: true, force: true });
});

describe("测试用例组", () => {
  it("保存、读取、列出、删除", () => {
    const g = saveTestGroup({
      name: "基础",
      cases: [{ name: "c1", charName: "林", charDescription: "冷静", worldBook: "古镇", userInput: "进门" }],
    });
    expect(g.cases[0]!.id).toBeTruthy();
    expect(getTestGroup(g.id)?.cases[0]!.charName).toBe("林");
    expect(listTestGroups()).toHaveLength(1);
    deleteTestGroup(g.id);
    expect(listTestGroups()).toHaveLength(0);
  });
});

describe("用例（工作台的展示单位）", () => {
  it("新用例落成只装它的一份组文件，平铺列表能读回", () => {
    const saved = saveTestCase({
      case: { name: "开门", userInput: "我推开门" },
    });
    expect(saved.groupId).toBeTruthy();
    expect(saved.case.id).toBeTruthy();
    expect(listTestCases().map((item) => item.case.name)).toEqual(["开门"]);
    expect(listTestGroups()).toHaveLength(1);
  });

  it("用例全局共享：换预设也能读到同一套", () => {
    saveTestCase({ case: { name: "全局用例", userInput: "甲" } });
    // 没有任何 presetId 参与，读取时也不需要
    expect(listTestCases().map((item) => item.case.name)).toEqual(["全局用例"]);
    expect(listTestGroups()[0]!.presetId).toBe("global");
  });

  it("旧版按预设分目录的用例会被并进全局目录", () => {
    const legacyDir = path.join(dir, "presets", "tests", "pp");
    mkdirSync(legacyDir, { recursive: true });
    writeFileSync(
      path.join(legacyDir, "old12345.json"),
      JSON.stringify({
        id: "old12345",
        presetId: "pp",
        name: "旧组",
        updatedAt: "2024-01-01T00:00:00.000Z",
        cases: [{ id: "c1", name: "老用例", charName: "", charDescription: "", worldBook: "", userInput: "x", history: [] }],
      }),
      "utf8",
    );
    expect(listTestCases().map((item) => item.case.name)).toEqual(["老用例"]);
    expect(getTestGroup("old12345")!.presetId).toBe("global");
  });

  it("存回旧组里的用例时不动同组其他用例", () => {
    const group = saveTestGroup({
      name: "旧组",
      cases: [{ name: "A", userInput: "甲" }, { name: "B", userInput: "乙" }],
    });
    const target = group.cases[1]!;
    saveTestCase({
      groupId: group.id,
      case: { ...target, userInput: "乙改" },
    });
    const after = getTestGroup(group.id)!.cases;
    expect(after.map((item) => item.userInput)).toEqual(["甲", "乙改"]);
  });

  it("删除最后一份用例时把空组文件一起收掉", () => {
    const saved = saveTestCase({ case: { name: "单条" } });
    deleteTestCase(saved.groupId, saved.case.id);
    expect(listTestCases()).toEqual([]);
    expect(listTestGroups()).toEqual([]);
  });
});

describe("预设的试跑状态", () => {
  it("按预设记住打开的是哪条用例，重读还在", () => {
    expect(loadPresetLabState("pp").selectedCaseId).toBe(null);
    savePresetLabState("pp", { selectedCaseId: "c1" });
    expect(loadPresetLabState("pp").selectedCaseId).toBe("c1");
    // 另一个预设不受影响
    expect(loadPresetLabState("qq").selectedCaseId).toBe(null);
    // 只传 previewCaseId 时不抹掉 selectedCaseId
    savePresetLabState("pp", { previewCaseId: "c2" });
    const state = loadPresetLabState("pp");
    expect(state.selectedCaseId).toBe("c1");
    expect(state.previewCaseId).toBe("c2");
  });
});

describe("用例消息组装", () => {
  it("char 描述、世界书、历史、用户输入按顺序进入 messages，且 {{char}} 被替换", () => {
    const msgs = buildCaseMessages(preset(), {
      id: "c", name: "c", charName: "林", charDescription: "冷静的侦探", worldBook: "古镇夜雨",
      userInput: "我推门", history: [{ role: "assistant", content: "门开了。" }],
    });
    const text = msgs.map((m) => `${m.role}:${m.content}`);
    expect(text[0]).toContain("你是林的叙事者");
    expect(text.join("\n")).toContain("古镇夜雨");
    expect(text.join("\n")).toContain("冷静的侦探");
    expect(text[text.length - 1]).toBe("user:我推门");
    expect(text).toContain("assistant:门开了。");
  });

  it("关掉 currentTurn 位置后，用户输入不再进入 messages", () => {
    const p = preset();
    const turn = p.promptOrder.find((item) => item.promptId === "currentTurn");
    if (turn) turn.enabled = false;
    const msgs = buildCaseMessages(p, {
      id: "c", name: "c", charName: "林", charDescription: "", worldBook: "",
      userInput: "这句不该出现", history: [],
    });
    expect(msgs.map((m) => m.content).join("\n")).not.toContain("这句不该出现");
  });

  it("只替换变动项：同一预设、不同用例的 system 规则保持一致", () => {
    const a = buildCaseMessages(preset(), { id: "a", name: "a", charName: "甲", charDescription: "", worldBook: "", userInput: "x", history: [] });
    const b = buildCaseMessages(preset(), { id: "b", name: "b", charName: "甲", charDescription: "", worldBook: "", userInput: "y", history: [] });
    // 默认整形为 strict：system 会并入相邻 user，故只比较规则文本是否都在首条里\n    expect(a[0]!.content.startsWith("你是甲的叙事者")).toBe(true);\n    expect(b[0]!.content.startsWith("你是甲的叙事者")).toBe(true);\n    expect(a[0]!.content.replace("x", "")).toBe(b[0]!.content.replace("y", ""));
  });
});

describe("运行记录与手动标记", () => {
  it("保存后可以修改标记并落盘", () => {
    saveTestRun({
      id: "r1", presetId: "pp", presetVersionId: "v1", groupId: "g", createdAt: new Date().toISOString(),
      requests: [], issues: [],
      results: [{ profileId: "p", profileName: "P", model: "m", caseId: "c", status: "done", verdict: null, startedAt: "" }],
    });
    updateVerdict("pp", "r1", "p", "c", "success");
    expect(getTestRun("pp", "r1")!.results[0]!.verdict).toBe("success");
  });
});