import pytest
from unittest.mock import MagicMock, patch
from pygui.backend.controllers.session_controller import SessionController

@pytest.fixture
def controller():
    return SessionController()

def test_initial_default(controller):
    assert controller.mode == "review"
    assert controller.state == "idle"
    assert controller.recording == False

def test_playback_flow(controller):
    controller.loadFile("tests/fixtures/sample_stream.csv")
    controller.play()
    initial_index = controller.frameIndex
    controller._advance()
    assert controller.frameIndex == initial_index + 1

def test_speed_control(controller):
    controller.setSpeed(2.0)
    interval = controller._next_interval_ms()
    controller.setSpeed(0.5)
    assert controller._next_interval_ms() > interval

def test_seek(controller):
    controller.loadFile("tests/fixtures/sample_stream.csv")
    controller.seek(1)
    assert controller.frameIndex == 1

def test_step_forward(controller):
    controller.loadFile("tests/fixtures/sample_stream.csv")
    initial = controller.frameIndex
    controller.step(1)
    assert controller.frameIndex == initial + 1

def test_step_backward(controller):
    controller.loadFile("tests/fixtures/sample_stream.csv")
    controller.seek(2)
    controller.step(-1)
    assert controller.frameIndex == 1

def test_pause_stop_timer(controller):
    controller.loadFile("tests/fixtures/sample_stream.csv")
    controller.seek(2)
    controller.stop()
    assert controller.frameIndex == 0