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

import type { Logger } from "../../src/server/logger";

import { createConsoleFallback, createMemoryLogger, createNoopLogger, REDACT_PATHS } from "../../src/server/logger";

function captureConsole(callback: () => void): { errors: string[]; logs: string[]; warns: string[] } {
  const originalError = console.error;
  const originalLog = console.log;
  const originalWarn = console.warn;
  const errors: string[] = [];
  const logs: string[] = [];
  const warns: string[] = [];

  console.error = (...args: unknown[]) => {
    errors.push(args.map(String).join(" "));
  };
  console.log = (...args: unknown[]) => {
    logs.push(args.map(String).join(" "));
  };
  console.warn = (...args: unknown[]) => {
    warns.push(args.map(String).join(" "));
  };

  try {
    callback();
  } finally {
    console.error = originalError;
    console.log = originalLog;
    console.warn = originalWarn;
  }

  return { errors, logs, warns };
}

describe("NoopLogger", () => {
  test("所有方法不抛异常", () => {
    const logger = createNoopLogger();
    logger.trace("trace");
    logger.debug("debug");
    logger.info("info");
    logger.warn("warn");
    logger.error("error");
    logger.fatal("fatal");
    logger.flush();
    const child = logger.child({ component: "test" });
    expect(child).toBeDefined();
  });
});

describe("MemoryLogger", () => {
  test("记录所有等级日志", () => {
    const logger = createMemoryLogger();
    logger.trace("trace-msg");
    logger.debug("debug-msg");
    logger.info("info-msg");
    logger.warn("warn-msg");
    logger.error("error-msg");
    logger.fatal("fatal-msg");

    expect(logger.entries).toHaveLength(6);
    expect(logger.entries[0]).toEqual({ level: "trace", msg: "trace-msg" });
    expect(logger.entries[5]).toEqual({ level: "fatal", msg: "fatal-msg" });
  });

  test("记录结构化日志", () => {
    const logger = createMemoryLogger();
    logger.info({ matched: true, targetId: "abc" }, "check complete");

    expect(logger.entries).toHaveLength(1);
    expect(logger.entries[0]!.level).toBe("info");
    expect(logger.entries[0]!.msg).toBe("check complete");
    expect(logger.entries[0]!.obj).toEqual({ matched: true, targetId: "abc" });
  });

  test("child 返回自身", () => {
    const logger = createMemoryLogger();
    const child = logger.child({ component: "test" });
    child.info("child-msg");
    expect(logger.entries).toHaveLength(1);
  });

  test("flush 不抛异常", () => {
    const logger = createMemoryLogger();
    logger.flush();
  });
});

describe("ConsoleFallbackLogger", () => {
  test("不抛异常", () => {
    const child = captureConsole(() => {
      const logger = createConsoleFallback();
      logger.trace("trace");
      logger.debug("debug");
      logger.info("info");
      logger.warn("warn");
      logger.error("error");
      logger.fatal("fatal");
      logger.flush();
      return logger.child({ component: "test" });
    });
    expect(child).toBeDefined();
  });

  test("按等级写入对应 console 通道", () => {
    const output = captureConsole(() => {
      const logger = createConsoleFallback();
      logger.info("info");
      logger.warn("warn");
      logger.error("error");
      logger.fatal("fatal");
    });

    expect(output.logs).toContain("info");
    expect(output.warns).toContain("warn");
    expect(output.errors).toEqual(["error", "fatal"]);
  });
});

describe("Logger 接口契约", () => {
  function assertLogger(logger: Logger): void {
    logger.trace("trace");
    logger.debug("debug");
    logger.info("info");
    logger.warn("warn");
    logger.error("error");
    logger.fatal("fatal");
    logger.info({ key: "value" }, "structured");
    logger.child({ component: "test" }).info("child");
    logger.flush();
  }

  test("NoopLogger 满足 Logger 接口", () => {
    expect(() => assertLogger(createNoopLogger())).not.toThrow();
  });

  test("MemoryLogger 满足 Logger 接口", () => {
    expect(() => assertLogger(createMemoryLogger())).not.toThrow();
  });

  test("ConsoleFallbackLogger 满足 Logger 接口", () => {
    expect(() => captureConsole(() => assertLogger(createConsoleFallback()))).not.toThrow();
  });
});

describe("redaction 敏感信息保护", () => {
  test("MemoryLogger 不做 redaction（测试用途，仅 Pino 运行时 redact）", () => {
    const logger = createMemoryLogger();
    logger.info({ authorization: "Bearer secret", password: "hunter2" }, "test");
    const entry = logger.entries[0]!;
    expect(entry.obj!["authorization"]).toBe("Bearer secret");
    expect(entry.obj!["password"]).toBe("hunter2");
  });

  test("REDACT_PATHS 覆盖所有敏感字段键名", () => {
    const sensitiveKeys = ["authorization", "cookie", "set-cookie", "authToken", "key", "password", "token", "apiKey"];
    for (const key of sensitiveKeys) {
      expect(REDACT_PATHS).toContain(key);
      expect(REDACT_PATHS).toContain(`*.${key}`);
    }
  });
});