import { afterAll, beforeAll, describe, expect, test } from "bun:test";
import { ProbeStore } from "../../../src/server/checker/store";
import type { ResolvedTarget } from "../../../src/server/checker/types";
import { mkdir, rm } from "node:fs/promises";
import { join } from "node:path";
import { tmpdir } from "node:os";

describe("ProbeStore", () => {
  let tempDir: string;
  let store: ProbeStore;

  const target1: ResolvedTarget = {
    name: "test-a",
    url: "http://a.com",
    method: "GET",
    headers: {},
    intervalMs: 30000,
    timeoutMs: 10000,
  };

  const target2: ResolvedTarget = {
    name: "test-b",
    url: "http://b.com",
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: '{"ping": true}',
    intervalMs: 60000,
    timeoutMs: 5000,
    expect: { status: [200], maxLatencyMs: 3000 },
  };

  beforeAll(async () => {
    tempDir = join(tmpdir(), `gc-store-test-${Date.now()}`);
    await mkdir(tempDir, { recursive: true });
    store = new ProbeStore(join(tempDir, "test.db"));
  });

  afterAll(async () => {
    store.close();
    await rm(tempDir, { recursive: true, force: true });
  });

  test("初始化后无 targets", () => {
    expect(store.getTargets()).toHaveLength(0);
  });

  test("同步新增 targets", () => {
    store.syncTargets([target1, target2]);
    const targets = store.getTargets();
    expect(targets).toHaveLength(2);
    expect(targets[0]!.name).toBe("test-a");
    expect(targets[1]!.name).toBe("test-b");
  });

  test("同步后 target 字段正确", () => {
    const targets = store.getTargets();
    const t2 = targets.find((t) => t.name === "test-b")!;
    expect(t2.url).toBe("http://b.com");
    expect(t2.method).toBe("POST");
    expect(JSON.parse(t2.headers)).toEqual({ "Content-Type": "application/json" });
    expect(t2.body).toBe('{"ping": true}');
    expect(t2.interval_ms).toBe(60000);
    expect(t2.expect).toBe(JSON.stringify({ status: [200], maxLatencyMs: 3000 }));
  });

  test("同步更新已有 target", () => {
    store.syncTargets([{ ...target1, url: "http://a-v2.com" }, target2]);
    const targets = store.getTargets();
    const t1 = targets.find((t) => t.name === "test-a")!;
    expect(t1.url).toBe("http://a-v2.com");
    expect(targets).toHaveLength(2);
  });

  test("同步删除 target", () => {
    store.syncTargets([target1]);
    const targets = store.getTargets();
    expect(targets).toHaveLength(1);
    expect(targets[0]!.name).toBe("test-a");
  });

  test("重新同步回来", () => {
    store.syncTargets([target1, target2]);
    expect(store.getTargets()).toHaveLength(2);
  });

  test("getTargetById", () => {
    const targets = store.getTargets();
    const found = store.getTargetById(targets[0]!.id);
    expect(found).toBeDefined();
    expect(found!.name).toBe("test-a");
  });

  test("getTargetById 不存在", () => {
    expect(store.getTargetById(99999)).toBeNull();
  });

  test("写入和查询 check result", () => {
    const targets = store.getTargets();
    const t1Id = targets[0]!.id;

    store.insertCheckResult({
      targetId: t1Id,
      timestamp: "2025-01-01T00:00:00.000Z",
      success: true,
      statusCode: 200,
      latencyMs: 150,
      error: null,
      matched: true,
    });

    store.insertCheckResult({
      targetId: t1Id,
      timestamp: "2025-01-01T00:00:30.000Z",
      success: true,
      statusCode: 200,
      latencyMs: 300,
      error: null,
      matched: true,
    });

    store.insertCheckResult({
      targetId: t1Id,
      timestamp: "2025-01-01T00:01:00.000Z",
      success: false,
      statusCode: null,
      latencyMs: null,
      error: "timeout",
      matched: false,
    });

    const history = store.getHistory(t1Id, 10);
    expect(history).toHaveLength(3);
    expect(history[0]!.timestamp).toBe("2025-01-01T00:01:00.000Z");

    const latest = store.getLatestCheck(t1Id)!;
    expect(latest.success).toBe(0);
    expect(latest.error).toBe("timeout");
  });

  test("getHistory 默认 limit=20", () => {
    const targets = store.getTargets();
    const t1Id = targets[0]!.id;

    for (let i = 0; i < 25; i++) {
      store.insertCheckResult({
        targetId: t1Id,
        timestamp: `2025-01-01T00:${String(i).padStart(2, "0")}:00.000Z`,
        success: true,
        statusCode: 200,
        latencyMs: 100 + i,
        error: null,
        matched: true,
      });
    }

    const history = store.getHistory(t1Id);
    expect(history).toHaveLength(20);
  });

  test("getTargetStats 计算可用率和延迟", () => {
    const targets = store.getTargets();
    const t1Id = targets[0]!.id;

    const stats = store.getTargetStats(t1Id);
    expect(stats.totalChecks).toBeGreaterThan(0);
    expect(stats.availability).toBeGreaterThanOrEqual(0);
    expect(stats.availability).toBeLessThanOrEqual(100);
    expect(stats.avgLatencyMs).not.toBeNull();
  });

  test("无记录目标的 stats", () => {
    const targets = store.getTargets();
    const t2Id = targets.find((t) => t.name === "test-b")!.id;

    const stats = store.getTargetStats(t2Id);
    expect(stats.totalChecks).toBe(0);
    expect(stats.availability).toBe(0);
    expect(stats.avgLatencyMs).toBeNull();
  });

  test("getSummary 返回总览统计", () => {
    const summary = store.getSummary();
    expect(summary.total).toBe(2);
    expect(summary.up + summary.down).toBe(2);
    expect(summary.lastCheckTime).not.toBeNull();
  });

  test("getTrend 返回趋势数据", () => {
    const targets = store.getTargets();
    const t1Id = targets[0]!.id;

    const trend = store.getTrend(t1Id, 24);
    expect(Array.isArray(trend)).toBe(true);
  });
});