import { describe, expect, test } from "bun:test";
import { ProbeEngine } from "../../../src/server/checker/engine";
import type { ProbeStore } from "../../../src/server/checker/store";
import type { ResolvedCommandTarget, ResolvedHttpTarget, ResolvedTarget } from "../../../src/server/checker/types";

function createMockStore(targetNames: string[]) {
  let nextId = 1;
  const targets = targetNames.map((name) => ({ id: nextId++, name }));
  const results: Array<Record<string, unknown>> = [];

  return {
    getTargets() {
      return targets.map(({ id, name }) => ({
        id,
        name,
        type: "command" as const,
        target: "",
        config: "",
        interval_ms: 60000,
        timeout_ms: 5000,
        expect: null,
      }));
    },
    insertCheckResult(result: Record<string, unknown>) {
      results.push(result);
    },
    _results: results,
  };
}

function makeCommandTarget(name: string, overrides?: Partial<ResolvedCommandTarget>): ResolvedCommandTarget {
  return {
    type: "command",
    name,
    command: {
      exec: "echo",
      args: ["hello"],
      cwd: "/tmp",
      env: {},
      maxOutputBytes: 1024 * 1024,
    },
    intervalMs: 60000,
    timeoutMs: 5000,
    ...overrides,
  };
}

describe("ProbeEngine", () => {
  test("start/stop 不抛错", () => {
    const mockStore = createMockStore(["test"]) as unknown as ProbeStore;
    const targets: ResolvedTarget[] = [makeCommandTarget("test")];
    const engine = new ProbeEngine(mockStore, targets);
    engine.start();
    engine.stop();
    expect(true).toBe(true);
  });

  test("单次 probeGroup 执行 command 检查", async () => {
    const target = makeCommandTarget("cmd-echo");
    const mockStore = createMockStore(["cmd-echo"]) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, [target]);

    const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
      engine,
    );
    await probeGroup([target]);

    const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
    expect(results.length).toBe(1);
    expect(results[0]!.success).toBe(true);
    expect(results[0]!.matched).toBe(true);
    expect(results[0]!.statusDetail).toBe("exitCode=0");
  });

  test("多个目标并发执行", async () => {
    const targetA = makeCommandTarget("echo-a", {
      command: { exec: "echo", args: ["a"], cwd: "/tmp", env: {}, maxOutputBytes: 1024 * 1024 },
    });
    const targetB = makeCommandTarget("echo-b", {
      command: { exec: "echo", args: ["b"], cwd: "/tmp", env: {}, maxOutputBytes: 1024 * 1024 },
    });

    const mockStore = createMockStore(["echo-a", "echo-b"]) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, [targetA, targetB]);

    const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
      engine,
    );
    await probeGroup([targetA, targetB]);

    const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
    expect(results.length).toBe(2);
  });

  test("失败目标不阻塞其他目标", async () => {
    const badTarget = makeCommandTarget("bad-cmd", {
      command: { exec: "false", args: [], cwd: "/tmp", env: {}, maxOutputBytes: 1024 * 1024 },
    });
    const goodTarget = makeCommandTarget("good-cmd");

    const mockStore = createMockStore(["bad-cmd", "good-cmd"]) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, [badTarget, goodTarget]);

    const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
      engine,
    );
    await probeGroup([badTarget, goodTarget]);

    const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
    expect(results.length).toBe(2);

    const badResult = results.find((r) => r.success === false);
    const goodResult = results.find((r) => r.success === true);
    expect(badResult).toBeDefined();
    expect(goodResult).toBeDefined();
  });

  test("并发限制 maxConcurrentChecks", async () => {
    const targets = Array.from({ length: 5 }, (_, i) =>
      makeCommandTarget(`cmd-${i}`, {
        command: { exec: "echo", args: [String(i)], cwd: "/tmp", env: {}, maxOutputBytes: 1024 * 1024 },
      }),
    );

    const mockStore = createMockStore(targets.map((t) => t.name)) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, targets, 2);

    const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
      engine,
    );
    await probeGroup(targets);

    const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
    expect(results.length).toBe(5);
    for (const r of results) {
      expect(r.success).toBe(true);
    }
  });

  test("groupByInterval 按间隔分组", () => {
    const targetA = makeCommandTarget("a", { intervalMs: 30000 });
    const targetB = makeCommandTarget("b", { intervalMs: 30000 });
    const targetC = makeCommandTarget("c", { intervalMs: 60000 });

    const mockStore = createMockStore(["a", "b", "c"]) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, [targetA, targetB, targetC]);
    engine.start();
    engine.stop();
    expect(true).toBe(true);
  });

  test("未注册的 targetName 不写入结果", async () => {
    const target = makeCommandTarget("unknown-target");
    const mockStore = createMockStore(["other-name"]) as unknown as ProbeStore;
    const engine = new ProbeEngine(mockStore, [target]);

    const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
      engine,
    );
    await probeGroup([target]);

    const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
    expect(results.length).toBe(0);
  });

  test("HTTP 目标运行", async () => {
    const httpServer = Bun.serve({
      port: 0,
      fetch() {
        return new Response("ok");
      },
    });

    try {
      const httpTarget: ResolvedHttpTarget = {
        type: "http",
        name: "http-test",
        http: {
          url: `http://localhost:${httpServer.port}/`,
          method: "GET",
          headers: {},
          maxBodyBytes: 1024 * 1024,
        },
        intervalMs: 60000,
        timeoutMs: 5000,
      };

      const mockStore = createMockStore(["http-test"]) as unknown as ProbeStore;
      const engine = new ProbeEngine(mockStore, [httpTarget]);

      const probeGroup = (engine as unknown as { probeGroup: (t: ResolvedTarget[]) => Promise<void> }).probeGroup.bind(
        engine,
      );
      await probeGroup([httpTarget]);

      const results = (mockStore as unknown as { _results: Array<Record<string, unknown>> })._results;
      expect(results.length).toBe(1);
      expect(results[0]!.success).toBe(true);
      expect(results[0]!.statusDetail).toBe("HTTP 200");
    } finally {
      httpServer.stop();
    }
  });
});