import { afterAll, beforeAll, describe, expect, test } from "bun:test";
import { mkdir, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";

import { loadConfig, parseDuration } from "../../../src/server/checker/config-loader";
import { checkerRegistry } from "../../../src/server/checker/runner";
import { CommandChecker } from "../../../src/server/checker/runner/command/runner";
import { HttpChecker } from "../../../src/server/checker/runner/http/runner";
import { readRuntimeConfig } from "../../../src/server/config";

function ensureRegistered() {
  if (!checkerRegistry.supportedTypes.includes("http")) {
    checkerRegistry.register(new HttpChecker());
    checkerRegistry.register(new CommandChecker());
  }
}

beforeAll(() => {
  ensureRegistered();
});

describe("parseDuration", () => {
  test("解析秒", () => {
    expect(parseDuration("30s")).toBe(30000);
    expect(parseDuration("1s")).toBe(1000);
  });

  test("解析分钟", () => {
    expect(parseDuration("5m")).toBe(300000);
    expect(parseDuration("1m")).toBe(60000);
  });

  test("解析毫秒", () => {
    expect(parseDuration("500ms")).toBe(500);
    expect(parseDuration("100ms")).toBe(100);
  });

  test("解析小数", () => {
    expect(parseDuration("1.5s")).toBe(1500);
  });

  test("无效格式抛出错误", () => {
    expect(() => parseDuration("30")).toThrow("无效的时长格式");
    expect(() => parseDuration("abc")).toThrow("无效的时长格式");
    expect(() => parseDuration("30x")).toThrow("无效的时长格式");
    expect(() => parseDuration("")).toThrow("无效的时长格式");
  });
});

describe("readRuntimeConfig", () => {
  test("返回配置文件路径", () => {
    expect(readRuntimeConfig(["./probes.yaml"])).toEqual({ configPath: "./probes.yaml" });
  });

  test("未提供参数抛出错误", () => {
    expect(() => readRuntimeConfig([])).toThrow("需要指定 YAML 配置文件路径");
  });
});

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

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

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

  test("解析最简 HTTP 配置", async () => {
    const configPath = join(tempDir, "minimal-http.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    http:
      url: "http://example.com"
`,
    );

    const config = await loadConfig(configPath);
    expect(config.host).toBe("127.0.0.1");
    expect(config.port).toBe(3000);
    expect(config.dataDir).toBe("./data");
    expect(config.maxConcurrentChecks).toBe(20);
    expect(config.targets).toHaveLength(1);
    const t = config.targets[0]!;
    expect(t.type).toBe("http");
    if (t.type === "http") {
      expect(t.name).toBe("test");
      expect(t.http.url).toBe("http://example.com");
      expect(t.http.method).toBe("GET");
      expect(t.http.headers).toEqual({});
      expect(t.http.ignoreSSL).toBe(false);
      expect(t.http.maxBodyBytes).toBe(104857600);
      expect(t.http.maxRedirects).toBe(0);
      expect(t.intervalMs).toBe(30000);
      expect(t.timeoutMs).toBe(10000);
    }
  });

  test("解析最简 command 配置", async () => {
    const subdir = join(tempDir, "subdir");
    await mkdir(subdir, { recursive: true });
    const configPath = join(subdir, "cmd.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "check-nginx"
    type: command
    command:
      exec: "pgrep"
      args: ["nginx"]
`,
    );

    const config = await loadConfig(configPath);
    expect(config.targets).toHaveLength(1);
    const t = config.targets[0]!;
    expect(t.type).toBe("command");
    if (t.type === "command") {
      expect(t.name).toBe("check-nginx");
      expect(t.command.exec).toBe("pgrep");
      expect(t.command.args).toEqual(["nginx"]);
      expect(t.command.cwd).toBe(subdir);
      expect(t.command.maxOutputBytes).toBe(104857600);
      expect(t.command.env["PATH"]).toBeDefined();
    }
  });

  test("解析完整配置", async () => {
    const configPath = join(tempDir, "full.yaml");
    await writeFile(
      configPath,
      `server:
  host: "0.0.0.0"
  port: 8080
  dataDir: "./my-data"
runtime:
  maxConcurrentChecks: 5
defaults:
  interval: "15s"
  timeout: "5s"
  http:
    method: "POST"
    headers:
      Authorization: "Bearer token"
    maxBodyBytes: "50MB"
  command:
    cwd: "/tmp"
    maxOutputBytes: "10MB"
targets:
  - name: "http-target"
    type: http
    interval: "1m"
    http:
      url: "http://example.com"
      ignoreSSL: true
      maxRedirects: 5
    expect:
      status: ["2xx", 301]
      body:
        - contains: "ok"
  - name: "cmd-target"
    type: command
    command:
      exec: "ls"
      args: ["/tmp"]
    expect:
      exitCode: [0]
`,
    );

    const config = await loadConfig(configPath);
    expect(config.host).toBe("0.0.0.0");
    expect(config.port).toBe(8080);
    expect(config.dataDir).toBe("./my-data");
    expect(config.maxConcurrentChecks).toBe(5);
    expect(config.targets).toHaveLength(2);

    const http = config.targets[0]!;
    expect(http.type).toBe("http");
    if (http.type === "http") {
      expect(http.http.url).toBe("http://example.com");
      expect(http.http.method).toBe("POST");
      expect(http.http.headers).toEqual({ Authorization: "Bearer token" });
      expect(http.http.ignoreSSL).toBe(true);
      expect(http.http.maxBodyBytes).toBe(52428800);
      expect(http.http.maxRedirects).toBe(5);
      expect(http.expect?.status).toEqual(["2xx", 301]);
      expect(http.intervalMs).toBe(60000);
      expect(http.timeoutMs).toBe(5000);
    }

    const cmd = config.targets[1]!;
    expect(cmd.type).toBe("command");
    if (cmd.type === "command") {
      expect(cmd.command.exec).toBe("ls");
      expect(cmd.command.args).toEqual(["/tmp"]);
      expect(cmd.command.maxOutputBytes).toBe(10485760);
    }
  });

  test("per-target 覆盖 defaults", async () => {
    const configPath = join(tempDir, "override.yaml");
    await writeFile(
      configPath,
      `defaults:
  interval: "30s"
  timeout: "10s"
  http:
    method: "GET"
    maxBodyBytes: "10MB"
targets:
  - name: "override-all"
    type: http
    interval: "5m"
    timeout: "30s"
    http:
      url: "http://example.com"
      method: "POST"
      maxBodyBytes: "1MB"
`,
    );

    const config = await loadConfig(configPath);
    const t = config.targets[0]!;
    if (t.type === "http") {
      expect(t.http.method).toBe("POST");
      expect(t.intervalMs).toBe(300000);
      expect(t.timeoutMs).toBe(30000);
      expect(t.http.maxBodyBytes).toBe(1048576);
    }
  });

  test("配置文件不存在抛出错误", async () => {
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig("/nonexistent/file.yaml")).rejects.toThrow("配置文件不存在");
  });

  test("target 缺少 name 抛出错误", async () => {
    const configPath = join(tempDir, "no-name.yaml");
    await writeFile(
      configPath,
      `targets:
  - type: http
    http:
      url: "http://example.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("缺少 name 字段");
  });

  test("target 缺少 type 抛出错误", async () => {
    const configPath = join(tempDir, "no-type.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    http:
      url: "http://example.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("缺少 type 字段");
  });

  test("HTTP target 缺少 url 抛出错误", async () => {
    const configPath = join(tempDir, "no-url.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    http: {}
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("缺少 http.url 字段");
  });

  test("HTTP target 缺少 http 分组抛出清晰错误", async () => {
    const configPath = join(tempDir, "no-http-group.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("缺少 http.url 字段");
  });

  test("HTTP target ignoreSSL 非布尔值抛出错误", async () => {
    const configPath = join(tempDir, "bad-ignore-ssl.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    http:
      url: "http://example.com"
      ignoreSSL: "true"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("ignoreSSL 必须为布尔值");
  });

  test("HTTP target maxRedirects 非负整数校验", async () => {
    const configPath = join(tempDir, "bad-max-redirects.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    http:
      url: "http://example.com"
      maxRedirects: 1.5
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("maxRedirects 必须为非负整数");
  });

  test("HTTP target status 模式非法抛出错误", async () => {
    const configPath = join(tempDir, "bad-status-pattern.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    http:
      url: "http://example.com"
    expect:
      status: ["abc"]
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("status 模式");
  });

  test("command target 缺少 exec 抛出错误", async () => {
    const configPath = join(tempDir, "no-exec.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: command
    command: {}
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("缺少 command.exec 字段");
  });

  test("非法 target type 抛出错误", async () => {
    const configPath = join(tempDir, "bad-type.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: dns
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("不支持的 type");
  });

  test("target name 重复抛出错误", async () => {
    const configPath = join(tempDir, "dup-name.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "dup"
    type: http
    http:
      url: "http://a.com"
  - name: "dup"
    type: http
    http:
      url: "http://b.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("target name 重复");
  });

  test("targets 为空数组抛出错误", async () => {
    const configPath = join(tempDir, "empty-targets.yaml");
    await writeFile(configPath, `targets: []`);
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("至少一个 target");
  });

  test("无效端口号抛出错误", async () => {
    const configPath = join(tempDir, "bad-port.yaml");
    await writeFile(
      configPath,
      `server:
  port: 99999
targets:
  - name: "t"
    type: http
    http:
      url: "http://a.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("无效端口号");
  });

  test("非法 maxConcurrentChecks 抛出错误", async () => {
    const configPath = join(tempDir, "bad-concurrency.yaml");
    await writeFile(
      configPath,
      `runtime:
  maxConcurrentChecks: -1
targets:
  - name: "t"
    type: http
    http:
      url: "http://a.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("maxConcurrentChecks 必须为正整数");
  });

  test("非法 size 格式抛出错误", async () => {
    const configPath = join(tempDir, "bad-size.yaml");
    await writeFile(
      configPath,
      `defaults:
  http:
    maxBodyBytes: "100TB"
targets:
  - name: "t"
    type: http
    http:
      url: "http://a.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("无效的 size 格式");
  });

  test("非法 interval 格式抛出错误", async () => {
    const configPath = join(tempDir, "bad-interval.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "t"
    type: http
    interval: "30x"
    http:
      url: "http://a.com"
`,
    );
    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("无效的时长格式");
  });

  test("解析 expect 配置", async () => {
    const configPath = join(tempDir, "expect.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "with-expect"
    type: http
    http:
      url: "http://example.com"
    expect:
      status: [200, 201]
      body:
        - contains: "ok"
        - json:
            path: "$.status"
            equals: "ok"
      maxDurationMs: 3000
`,
    );

    const config = await loadConfig(configPath);
    const t = config.targets[0]!;
    if (t.type === "http") {
      expect(t.expect).toEqual({
        body: [{ contains: "ok" }, { json: { equals: "ok", path: "$.status" } }],
        maxDurationMs: 3000,
        status: [200, 201],
      });
    }
  });

  test("解析 command expect 配置", async () => {
    const configPath = join(tempDir, "cmd-expect.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "cmd-with-expect"
    type: command
    command:
      exec: "mycheck"
    expect:
      exitCode: [0, 2]
      stdout:
        - contains: "ok"
        - match: "done"
      stderr:
        - empty: true
      maxDurationMs: 5000
`,
    );

    const config = await loadConfig(configPath);
    const t = config.targets[0]!;
    if (t.type === "command") {
      expect(t.expect).toEqual({
        exitCode: [0, 2],
        maxDurationMs: 5000,
        stderr: [{ empty: true }],
        stdout: [{ contains: "ok" }, { match: "done" }],
      });
    }
  });

  test("command cwd 相对配置文件目录", async () => {
    const subdir = join(tempDir, "cwd-test");
    await mkdir(subdir, { recursive: true });
    const configPath = join(subdir, "cwd.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "cwd-test"
    type: command
    command:
      exec: "ls"
      cwd: "scripts"
`,
    );

    const config = await loadConfig(configPath);
    const t = config.targets[0]!;
    if (t.type === "command") {
      expect(t.command.cwd).toBe(join(subdir, "scripts"));
    }
  });

  test("command env 覆盖", async () => {
    const configPath = join(tempDir, "env.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "env-test"
    type: command
    command:
      exec: "echo"
      env:
        LANG: "C"
        CUSTOM_VAR: "test"
`,
    );

    const config = await loadConfig(configPath);
    const t = config.targets[0]!;
    if (t.type === "command") {
      expect(t.command.env["LANG"]).toBe("C");
      expect(t.command.env["CUSTOM_VAR"]).toBe("test");
      expect(t.command.env["PATH"]).toBeDefined();
    }
  });

  test("解析 group 字段", async () => {
    const configPath = join(tempDir, "group.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "grouped"
    type: http
    group: "搜索引擎"
    http:
      url: "http://example.com"
`,
    );

    const config = await loadConfig(configPath);
    expect(config.targets[0]!.group).toBe("搜索引擎");
  });

  test("group 字段默认为 default", async () => {
    const configPath = join(tempDir, "no-group.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "no-group"
    type: http
    http:
      url: "http://example.com"
`,
    );

    const config = await loadConfig(configPath);
    expect(config.targets[0]!.group).toBe("default");
  });

  test("非法 group 类型抛出错误", async () => {
    const configPath = join(tempDir, "bad-group.yaml");
    await writeFile(
      configPath,
      `targets:
  - name: "test"
    type: http
    group: 123
    http:
      url: "http://example.com"
`,
    );

    // eslint-disable-next-line @typescript-eslint/await-thenable
    await expect(loadConfig(configPath)).rejects.toThrow("group 字段必须为字符串");
  });
});