import { describe, expect, mock, test } from "bun:test";
import { act, createElement, useState } from "react";

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

import { useLogger } from "../../../src/web/hooks/use-logger";
import { renderWithProviders } from "../test-utils";

function BindingsHookTester({
  bindings,
  onMount,
}: {
  bindings?: Record<string, unknown>;
  onMount: (logger: Logger) => void;
}) {
  const logger = useLogger(bindings);
  onMount(logger);
  return null;
}

function HookTester({ onMount }: { onMount: (logger: Logger) => void }) {
  const logger = useLogger();
  onMount(logger);
  return null;
}

describe("useLogger", () => {
  test("返回 Logger 实例含所有方法", () => {
    let logger: Logger | undefined;
    const onMount = (l: Logger) => {
      logger = l;
    };

    renderWithProviders(createElement(HookTester, { onMount }));

    expect(logger).toBeDefined();
    expect(typeof logger!.debug).toBe("function");
    expect(typeof logger!.info).toBe("function");
    expect(typeof logger!.warn).toBe("function");
    expect(typeof logger!.error).toBe("function");
    expect(typeof logger!.child).toBe("function");
    expect(typeof logger!.setLevel).toBe("function");
  });

  test("调用 logger.warn 时静默不抛异常", () => {
    const warnSpy = mock(() => {});
    const origWarn = console.warn;
    console.warn = warnSpy;

    let logger: Logger | undefined;
    renderWithProviders(
      createElement(HookTester, {
        onMount: (l: Logger) => {
          logger = l;
        },
      }),
    );

    expect(() => logger!.warn("测试警告")).not.toThrow();

    console.warn = origWarn;
    expect(warnSpy).toHaveBeenCalled();
  });

  test("调用 logger.error 时静默不抛异常", () => {
    const errorSpy = mock(() => {});
    const origError = console.error;
    console.error = errorSpy;

    let logger: Logger | undefined;
    renderWithProviders(
      createElement(HookTester, {
        onMount: (l: Logger) => {
          logger = l;
        },
      }),
    );

    expect(() => logger!.error("测试错误")).not.toThrow();

    console.error = origError;
    expect(errorSpy).toHaveBeenCalled();
  });
});

describe("useLogger bindings 参数", () => {
  test("传入 bindings 返回带上下文前缀的 Logger", () => {
    const spy = mock((..._args: unknown[]) => {});
    const origWarn = console.warn;
    console.warn = spy;

    let logger: Logger | undefined;
    renderWithProviders(
      createElement(BindingsHookTester, {
        bindings: { component: "TestComp" },
        onMount: (l: Logger) => {
          logger = l;
        },
      }),
    );

    logger!.warn("绑定测试");

    console.warn = origWarn;
    expect(spy).toHaveBeenCalledTimes(1);
    expect(spy.mock.calls[0]![0]).toMatch(/\[component=TestComp\]/);
  });

  test("无参调用与空 bindings 行为一致", () => {
    let noBindingsLogger: Logger | undefined;
    let emptyBindingsLogger: Logger | undefined;

    const spy = mock((..._args: unknown[]) => {});
    const origWarn = console.warn;
    console.warn = spy;

    renderWithProviders(
      createElement(HookTester, {
        onMount: (l: Logger) => {
          noBindingsLogger = l;
        },
      }),
    );

    renderWithProviders(
      createElement(BindingsHookTester, {
        bindings: {},
        onMount: (l: Logger) => {
          emptyBindingsLogger = l;
        },
      }),
    );

    noBindingsLogger!.warn("a");
    emptyBindingsLogger!.warn("b");

    console.warn = origWarn;
    expect(spy).toHaveBeenCalledTimes(2);
    expect(spy.mock.calls[0]![0]).not.toMatch(/\[component=/);
    expect(spy.mock.calls[1]![0]).not.toMatch(/\[component=/);
  });

  test("相同 bindings 值多次渲染返回同一 Logger 引用", () => {
    const refs: Logger[] = [];

    function StableTester() {
      const logger = useLogger({ component: "Stable" });
      const [, setTick] = useState(0);
      refs.push(logger);
      return createElement("button", {
        onClick: () => setTick((t) => t + 1),
      });
    }

    const result = renderWithProviders(createElement(StableTester));
    const initialCount = refs.length;

    act(() => {
      result.getByRole("button").click();
    });
    act(() => {
      result.getByRole("button").click();
    });

    expect(refs.length).toBeGreaterThan(initialCount);
    for (let i = 1; i < refs.length; i++) {
      expect(refs[i]).toBe(refs[0]);
    }
  });

  test("bindings 值变化时返回新 Logger 引用", () => {
    const refs: Logger[] = [];
    let currentBindings: Record<string, unknown> = { component: "A" };

    function DynamicTester() {
      const logger = useLogger(currentBindings);
      refs.push(logger);
      return null;
    }

    const { rerender } = renderWithProviders(createElement(DynamicTester));
    const countBefore = refs.length;

    currentBindings = { component: "B" };
    rerender(createElement(DynamicTester));

    expect(refs.length).toBe(countBefore + 1);
    expect(refs[refs.length - 1]).not.toBe(refs[0]);
  });
});