"""Tests for graphs/stats — TDD: tests before implementation."""

import pytest
from i2p_apps.console.app import create_app
from i2p_apps.console.services.stats_collector import StatsCollector


@pytest.fixture
def client():
    app = create_app({"TESTING": True})
    return app.test_client()


class TestGraphsPage:
    def test_graphs_renders(self, client):
        resp = client.get("/graphs")
        assert resp.status_code == 200
        assert b"html" in resp.data.lower()

    def test_graphs_has_chart_container(self, client):
        resp = client.get("/graphs")
        assert b"plotly" in resp.data.lower() or b"chart" in resp.data.lower()


class TestStatsCollector:
    def test_creation(self):
        sc = StatsCollector()
        assert sc is not None

    def test_record_and_get(self):
        sc = StatsCollector()
        sc.record("bandwidth.in", 1024)
        sc.record("bandwidth.in", 2048)
        values = sc.get("bandwidth.in")
        assert len(values) == 2

    def test_get_nonexistent(self):
        sc = StatsCollector()
        assert sc.get("nonexistent") == []

    def test_average(self):
        sc = StatsCollector()
        sc.record("test.stat", 10)
        sc.record("test.stat", 20)
        sc.record("test.stat", 30)
        assert sc.average("test.stat") == 20.0

    def test_average_empty(self):
        sc = StatsCollector()
        assert sc.average("empty") == 0.0

    def test_summary(self):
        sc = StatsCollector()
        sc.record("stat1", 100)
        sc.record("stat2", 200)
        summary = sc.summary()
        assert "stat1" in summary
        assert "stat2" in summary

    def test_max_samples(self):
        sc = StatsCollector(max_samples=3)
        for i in range(10):
            sc.record("test", float(i))
        assert len(sc.get("test")) == 3