import { describe, expect, test } from "bun:test";
import { checkHttpExpect } from "../../../../src/server/checker/expect/http";
import type { HttpObservation } from "../../../../src/server/checker/expect/http";
import type { HttpExpectConfig } from "../../../../src/server/checker/types";

function obs(overrides: Partial<HttpObservation> = {}): HttpObservation {
  return {
    statusCode: 200,
    headers: {},
    body: "",
    durationMs: 100,
    ...overrides,
  };
}

describe("checkHttpExpect", () => {
  test("无 expect 配置时默认检查 status [200] 匹配成功", () => {
    const r = checkHttpExpect(obs());
    expect(r.matched).toBe(true);
    expect(r.failure).toBeNull();
  });

  test("无 expect 配置时 status 非 200 匹配失败", () => {
    const r = checkHttpExpect(obs({ statusCode: 500 }));
    expect(r.matched).toBe(false);
    expect(r.failure).not.toBeNull();
    expect(r.failure!.phase).toBe("status");
    expect(r.failure!.kind).toBe("mismatch");
  });

  test("status 匹配指定状态码", () => {
    const cfg: HttpExpectConfig = { status: [200, 301] };
    expect(checkHttpExpect(obs({ statusCode: 200 }), cfg).matched).toBe(true);
    expect(checkHttpExpect(obs({ statusCode: 301 }), cfg).matched).toBe(true);
    expect(checkHttpExpect(obs({ statusCode: 404 }), cfg).matched).toBe(false);
  });

  test("status 不匹配返回 phase=status 的失败", () => {
    const r = checkHttpExpect(obs({ statusCode: 503 }), { status: [200] });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("status");
    expect(r.failure!.expected).toEqual([200]);
    expect(r.failure!.actual).toBe(503);
  });

  test("duration 在限制内匹配成功", () => {
    const r = checkHttpExpect(obs({ durationMs: 50 }), { maxDurationMs: 100 });
    expect(r.matched).toBe(true);
  });

  test("duration 超过限制匹配失败", () => {
    const r = checkHttpExpect(obs({ durationMs: 200 }), { maxDurationMs: 100 });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("duration");
  });

  test("duration 恰好等于限制匹配成功", () => {
    const r = checkHttpExpect(obs({ durationMs: 100 }), { maxDurationMs: 100 });
    expect(r.matched).toBe(true);
  });

  test("headers 字符串格式检查（等于）", () => {
    const o = obs({ headers: { "content-type": "application/json", "x-api": "v1" } });
    expect(checkHttpExpect(o, { headers: { "content-type": "application/json" } }).matched).toBe(true);
    expect(checkHttpExpect(o, { headers: { "content-type": "text/html" } }).matched).toBe(false);
  });

  test("headers 操作符格式检查", () => {
    const o = obs({ headers: { "content-type": "application/json" } });
    expect(checkHttpExpect(o, { headers: { "content-type": { contains: "json" } } }).matched).toBe(true);
    expect(checkHttpExpect(o, { headers: { "content-type": { match: "^application/" } } }).matched).toBe(true);
    expect(checkHttpExpect(o, { headers: { "content-type": { contains: "xml" } } }).matched).toBe(false);
  });

  test("headers 大小写不敏感匹配", () => {
    const o = obs({ headers: { "content-type": "application/json" } });
    expect(checkHttpExpect(o, { headers: { "Content-Type": "application/json" } }).matched).toBe(true);
  });

  test("headers 不存在时返回失败", () => {
    const o = obs({ headers: {} });
    const r = checkHttpExpect(o, { headers: { "x-missing": "value" } });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("headers");
  });

  test("body 规则数组按顺序检查", () => {
    const o = obs({ body: JSON.stringify({ status: "ok", count: 5 }) });
    const r = checkHttpExpect(o, {
      body: [{ contains: "ok" }, { json: { path: "$.count", gte: 1 } }],
    });
    expect(r.matched).toBe(true);
  });

  test("body 第一条规则失败立即返回", () => {
    const o = obs({ body: "hello world" });
    const r = checkHttpExpect(o, {
      body: [{ contains: "missing" }, { contains: "hello" }],
    });
    expect(r.matched).toBe(false);
    expect(r.failure!.path).toBe("body[0]");
  });

  test("body 为 null 但有 body 规则时报错", () => {
    const o = obs({ body: null });
    const r = checkHttpExpect(o, { body: [{ contains: "test" }] });
    expect(r.matched).toBe(false);
    expect(r.failure!.kind).toBe("error");
  });

  test("完整流水线 status->duration->headers->body 全部通过", () => {
    const o = obs({
      statusCode: 200,
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ status: "healthy" }),
      durationMs: 50,
    });
    const r = checkHttpExpect(o, {
      status: [200],
      maxDurationMs: 100,
      headers: { "content-type": { contains: "json" } },
      body: [{ json: { path: "$.status", equals: "healthy" } }],
    });
    expect(r.matched).toBe(true);
    expect(r.failure).toBeNull();
  });

  test("完整流水线 status 通过但 duration 失败", () => {
    const o = obs({ statusCode: 200, durationMs: 500 });
    const r = checkHttpExpect(o, {
      status: [200],
      maxDurationMs: 100,
    });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("duration");
  });

  test("完整流水线 status 和 duration 通过但 headers 失败", () => {
    const o = obs({ statusCode: 200, durationMs: 50, headers: { "x-api": "v1" } });
    const r = checkHttpExpect(o, {
      status: [200],
      maxDurationMs: 100,
      headers: { "x-api": "v2" },
    });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("headers");
  });

  test("完整流水线 status/duration/headers 通过但 body 失败", () => {
    const o = obs({
      statusCode: 200,
      durationMs: 50,
      headers: { "content-type": "text/plain" },
      body: "error occurred",
    });
    const r = checkHttpExpect(o, {
      status: [200],
      maxDurationMs: 100,
      headers: { "content-type": "text/plain" },
      body: [{ contains: "success" }],
    });
    expect(r.matched).toBe(false);
    expect(r.failure!.phase).toBe("body");
  });
});