import { mkdtemp, rm } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { afterEach, beforeEach, describe, expect, it } from "vitest";
import {
  createImageTemplate,
  deleteImageTemplate,
  listImageTemplates,
  updateImageTemplate
} from "@/lib/server/data-store";
import { normalizeImageTemplateCreate } from "@/lib/server/image-template-input";
import { extractMaterialPlaceholders } from "@/lib/prompt/material-placeholders";

let runtimeDir = "";
let previousRuntimeDir: string | undefined;
let previousSupabaseUrl: string | undefined;
let previousSupabaseKey: string | undefined;

describe("image templates", () => {
  beforeEach(async () => {
    runtimeDir = await mkdtemp(join(tmpdir(), "zhinian-templates-"));
    previousRuntimeDir = process.env.ZHINIAN_RUNTIME_DIR;
    previousSupabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;
    previousSupabaseKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
    process.env.ZHINIAN_RUNTIME_DIR = runtimeDir;
    delete process.env.NEXT_PUBLIC_SUPABASE_URL;
    delete process.env.SUPABASE_SERVICE_ROLE_KEY;
  });

  afterEach(async () => {
    restoreEnv("ZHINIAN_RUNTIME_DIR", previousRuntimeDir);
    restoreEnv("NEXT_PUBLIC_SUPABASE_URL", previousSupabaseUrl);
    restoreEnv("SUPABASE_SERVICE_ROLE_KEY", previousSupabaseKey);
    await rm(runtimeDir, { force: true, recursive: true });
  });

  it("stores templates inside the account owner boundary", async () => {
    const first = await createImageTemplate({
      ownerId: "auth:app:user-a",
      name: "商品主图",
      description: "适合电商主视觉",
      prompt: "生成干净高级的商品主图",
      previewImageUrl: "/mock/preview-a.png",
      settings: { width: 2048, height: 2048, forceSingle: true },
      sortOrder: 2
    });
    await createImageTemplate({
      ownerId: "auth:app:user-b",
      name: "社媒海报",
      prompt: "生成适合社媒传播的海报",
      settings: {},
      sortOrder: 1
    });

    const owned = await listImageTemplates("auth:app:user-a");
    expect(owned).toHaveLength(1);
    expect(owned[0]).toMatchObject({
      id: first.id,
      ownerId: "auth:app:user-a",
      description: "适合电商主视觉",
      prompt: "生成干净高级的商品主图",
      settings: { width: 2048, height: 2048, forceSingle: true }
    });
    expect(await listImageTemplates("auth:app:user-b")).toHaveLength(1);
  });

  it("does not update or delete another account's template", async () => {
    const template = await createImageTemplate({
      ownerId: "auth:app:user-a",
      name: "A",
      prompt: "提示词 A",
      settings: {},
      sortOrder: 0
    });

    expect(await updateImageTemplate(template.id, "auth:app:user-b", { name: "B" })).toBeNull();
    expect(await deleteImageTemplate(template.id, "auth:app:user-b")).toBeNull();
    expect((await listImageTemplates("auth:app:user-a"))[0].name).toBe("A");

    const updated = await updateImageTemplate(template.id, "auth:app:user-a", { name: "A+", sortOrder: 3 });
    expect(updated).toMatchObject({ name: "A+", sortOrder: 3 });
    expect(await deleteImageTemplate(template.id, "auth:app:user-a")).toMatchObject({ id: template.id });
    expect(await listImageTemplates("auth:app:user-a")).toHaveLength(0);
  });

  it("normalizes template creation input", () => {
    expect(normalizeImageTemplateCreate({
      name: "  品牌氛围图  ",
      description: "  品牌视觉模板  ",
      prompt: "  生成品牌氛围视觉  ",
      previewImageUrl: "https://example.com/preview.png",
      settings: { engine: "evolink", width: "1440", height: "2560", forceSingle: false, quality: "high", scale: "999" },
      sortOrder: "5"
    })).toMatchObject({
      name: "品牌氛围图",
      description: "品牌视觉模板",
      prompt: "生成品牌氛围视觉",
      previewImageUrl: "https://example.com/preview.png",
      settings: { engine: "evolink", width: 1440, height: 2560, forceSingle: false, quality: "high", scale: 100 },
      sortOrder: 5
    });
    expect(() => normalizeImageTemplateCreate({ name: "", prompt: "x" })).toThrow("模板名称不能为空");
    expect(() => normalizeImageTemplateCreate({ name: "x", prompt: "x", previewImageUrl: "javascript:alert(1)" })).toThrow("效果预览图地址");
  });

  it("extracts prompt material placeholders for template upload slots", () => {
    expect(extractMaterialPlaceholders("以 @图片1 为主体，参考 @图2 的色调，再参考 @视频1 的运动感。")).toEqual([
      { token: "@图片1", type: "image", index: 1 },
      { token: "@图片2", type: "image", index: 2 },
      { token: "@视频1", type: "video", index: 1 }
    ]);
    expect(extractMaterialPlaceholders("以 @图片 为主体，@图片这种普通文字不应变成占位。")).toEqual([]);
  });
});

function restoreEnv(name: string, value: string | undefined) {
  if (value === undefined) {
    delete process.env[name];
    return;
  }
  process.env[name] = value;
}