import pytest

from midi_controller_launchpad_mini import MidiController
from solo_tool import SoloTool
from player_mock import Player as PlayerMock

class MidiWrapperMock:
    def __init__(self):
        self.callback = None
        self.connectedDevice = None
        self.lastMessageSent = None

    def setCallback(self, callback):
        self.callback = callback

    def connect(self, deviceName):
        self.connectedDevice = deviceName
    
    def sendMessage(self, note, velocity=127, channel=0):
        pass
    
    def simulateInput(self, note, velocity=127, channel=0):
        if self.callback is not None:
            from mido import Message
            msg = Message("note_on", note=note, velocity=velocity, channel=channel)
            self.callback(msg)

@pytest.fixture
def playerMock():
    return PlayerMock()

@pytest.fixture
def soloTool(playerMock):
    return SoloTool(playerMock)

@pytest.fixture
def midiWrapperMock():
    return MidiWrapperMock()

@pytest.fixture
def uut(soloTool, midiWrapperMock):
    return MidiController(soloTool, midiWrapperMock)

def test_connect(uut, midiWrapperMock):
    expectedDevice = "Launchpad Mini MIDI 1"
    uut.connect()

    assert midiWrapperMock.connectedDevice == expectedDevice

def test_startStopAndPauseButtons(uut, midiWrapperMock, playerMock):
    playPauseButton = 112
    stopButton = 96
    uut.connect()

    assert playerMock.state == PlayerMock.STOPPED

    midiWrapperMock.simulateInput(playPauseButton)
    assert playerMock.state == PlayerMock.PLAYING

    midiWrapperMock.simulateInput(stopButton)
    assert playerMock.state == PlayerMock.STOPPED

    midiWrapperMock.simulateInput(playPauseButton)
    midiWrapperMock.simulateInput(playPauseButton)
    assert playerMock.state == PlayerMock.PAUSED

    midiWrapperMock.simulateInput(playPauseButton)
    assert playerMock.state == PlayerMock.PLAYING

    midiWrapperMock.simulateInput(playPauseButton)
    midiWrapperMock.simulateInput(stopButton)
    assert playerMock.state == PlayerMock.STOPPED

def test_jumpToAButton(uut, midiWrapperMock, soloTool, playerMock):
    ab = (0.5, 0.6)
    uut.connect()
    
    soloTool.setAbLimits(ab[0], ab[1])
    assert playerMock.position == 0.0

    midiWrapperMock.simulateInput(101)
    assert playerMock.position == ab[0]

def test_previousAndNextSongButtons(uut, midiWrapperMock, soloTool, playerMock):
    songs = [
        "test.flac",
        "test.mp3"
    ]
    for s in songs:
        soloTool.addSong(s)
    uut.connect()

    assert playerMock.currentSong == None
    midiWrapperMock.simulateInput(119)
    assert playerMock.currentSong == songs[0]

    midiWrapperMock.simulateInput(119)
    assert playerMock.currentSong == songs[1]

    midiWrapperMock.simulateInput(118)
    assert playerMock.currentSong == songs[0]

    midiWrapperMock.simulateInput(118)
    assert playerMock.currentSong == songs[0]

def test_unprogrammedButton(uut, midiWrapperMock):
    unusedButton = 48
    uut.connect()

    # expect no crash
    midiWrapperMock.simulateInput(48)