from __future__ import annotations

import asyncio
import logging
import time

import pytest
import httpx

from sync_state_machine.datasource.api.client import ApiClient


class _FakeResponse:
    status_code = 200

    def raise_for_status(self) -> None:
        return None

    def json(self) -> dict:
        return {"code": 200, "data": []}


class _FakeAsyncClient:
    def __init__(self) -> None:
        self.call_times: list[float] = []
        self.closed = False

    async def request(self, **kwargs):
        self.call_times.append(time.monotonic())
        return _FakeResponse()

    async def aclose(self) -> None:
        self.closed = True


class _FailingAsyncClient:
    def __init__(self) -> None:
        self.closed = False

    async def request(self, **kwargs):
        request = httpx.Request(kwargs["method"], kwargs["url"])
        response = httpx.Response(500, request=request, text="boom")
        raise httpx.HTTPStatusError("server error", request=request, response=response)

    async def aclose(self) -> None:
        self.closed = True


@pytest.mark.asyncio
async def test_api_client_global_rate_limit_applies_to_concurrent_requests() -> None:
    client = ApiClient(
        base_url="http://example.com",
        uid="uid",
        secret="secret",
        rate_limit_max_requests=2,
        rate_limit_window_seconds=0.2,
    )
    fake_client = _FakeAsyncClient()
    client._client = fake_client

    await asyncio.gather(
        client.request("GET", "/ping"),
        client.request("GET", "/ping"),
        client.request("GET", "/ping"),
    )

    assert len(fake_client.call_times) == 3
    third_delay = fake_client.call_times[2] - fake_client.call_times[0]
    assert third_delay >= 0.15


@pytest.mark.asyncio
async def test_api_client_request_stats_track_success_and_failure(caplog: pytest.LogCaptureFixture) -> None:
    client = ApiClient(
        base_url="http://example.com",
        uid="uid",
        secret="secret",
    )
    logger_name = "sync_state_machine.datasource.api.client"
    success_client = _FakeAsyncClient()
    client._client = success_client

    with caplog.at_level(logging.INFO, logger=logger_name):
        await client.request("GET", "/ping")

        failing_client = _FailingAsyncClient()
        client._client = failing_client
        with pytest.raises(httpx.HTTPStatusError):
            await client.request("GET", "/ping")

        stats = client.get_request_stats()
        assert stats == {"total": 2, "success": 1, "failure": 1}
        assert client.format_request_stats().endswith("total=2, success=1, failure=1")

        await client.close()

    assert failing_client.closed is True
    assert "📊 ApiClient request stats: total=2, success=1, failure=1" in caplog.text


@pytest.mark.asyncio
async def test_api_client_logs_one_line_request_summary_in_debug_mode(caplog: pytest.LogCaptureFixture) -> None:
    client = ApiClient(
        base_url="http://example.com",
        uid="uid",
        secret="secret",
        debug=True,
    )
    logger_name = "sync_state_machine.datasource.api.client"
    fake_client = _FakeAsyncClient()
    client._client = fake_client

    with caplog.at_level(logging.INFO, logger=logger_name):
        await client.request("GET", "/ping")

    assert "🔎 ApiClient request: method=GET endpoint=/ping elapsed=" in caplog.text