import type Database from "bun:sqlite";

import { describe, expect, test } from "bun:test";

import type { RuntimeMode } from "../../../src/shared/api";

import { createNoopLogger } from "../../../src/server/logger";
import { createMigratedMemoryTestDatabase } from "../../helpers";

const MODE: RuntimeMode = "test";
const LOG = createNoopLogger();

async function getSettingsViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleGetSettings: h } = await import("../../../src/server/routes/settings");
  return h(req, db, MODE, LOG);
}

async function updateSettingsViaHandler(req: Request, db: Database): Promise<Response> {
  const { handleUpdateSettings: h } = await import("../../../src/server/routes/settings");
  return h(req, db, MODE, LOG);
}

async function withRouteDb(callback: (db: Database) => Promise<void>): Promise<void> {
  const handle = createMigratedMemoryTestDatabase("route-settings-test");
  try {
    await callback(handle.db);
    handle.close();
  } finally {
    handle.cleanup();
  }
}

describe("设置 API 路由", () => {
  test("GET /api/settings 返回默认值", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings");
      const res = await getSettingsViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { theme: string };
      expect(body).toEqual({ theme: "system" });
    });
  });

  test("PUT /api/settings 写入后 GET 验证一致性", async () => {
    await withRouteDb(async (db) => {
      const putReq = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: "dark" }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const putRes = await updateSettingsViaHandler(putReq, db);
      expect(putRes.status).toBe(200);
      const putBody = (await putRes.json()) as { theme: string };
      expect(putBody).toEqual({ theme: "dark" });

      const getReq = new Request("http://localhost/api/settings");
      const getRes = await getSettingsViaHandler(getReq, db);
      expect(getRes.status).toBe(200);
      const getBody = (await getRes.json()) as { theme: string };
      expect(getBody).toEqual({ theme: "dark" });
    });
  });

  test("PUT /api/settings 部分更新", async () => {
    await withRouteDb(async (db) => {
      const req1 = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: "dark" }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      await updateSettingsViaHandler(req1, db);

      const req2 = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: "light" }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res2 = await updateSettingsViaHandler(req2, db);
      expect(res2.status).toBe(200);
      const body = (await res2.json()) as { theme: string };
      expect(body).toEqual({ theme: "light" });
    });
  });

  test("PUT /api/settings 非法 JSON 返回 400", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings", {
        body: "not-json",
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res = await updateSettingsViaHandler(req, db);
      expect(res.status).toBe(400);
    });
  });

  test("PUT /api/settings theme 非字符串返回 400", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: 123 }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res = await updateSettingsViaHandler(req, db);
      expect(res.status).toBe(400);
    });
  });

  test("PUT /api/settings 非法 theme 值返回 400", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: "auto" }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res = await updateSettingsViaHandler(req, db);
      expect(res.status).toBe(400);
    });
  });

  test("PUT /api/settings theme=system 合法", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings", {
        body: JSON.stringify({ theme: "system" }),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res = await updateSettingsViaHandler(req, db);
      expect(res.status).toBe(200);
    });
  });

  test("PUT /api/settings 空 body 不报错", async () => {
    await withRouteDb(async (db) => {
      const req = new Request("http://localhost/api/settings", {
        body: JSON.stringify({}),
        headers: { "Content-Type": "application/json" },
        method: "PUT",
      });
      const res = await updateSettingsViaHandler(req, db);
      expect(res.status).toBe(200);
      const body = (await res.json()) as { theme: string };
      expect(body).toEqual({ theme: "system" });
    });
  });
});